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32,554,528
|
AMP-activated protein kinase regulates cytoplasmic dynein behavior and contributes to neuronal migration in the developing neocortex.
|
The microtubule motor cytoplasmic dynein contributes to radial migration of newborn pyramidal neurons in the developing neocortex. Here, we show that AMP-activated protein kinase (AMPK) mediates the nucleus-centrosome coupling, a key process for radial neuronal migration that relies on dynein. Depletion of the catalytic subunit of AMPK in migrating neurons impairs this coupling as well as neuronal migration. AMPK shows overlapping subcellular distribution with cytoplasmic dynein and the two proteins interact with each other. Pharmacological inhibition or activation of AMPK modifies the phosphorylation states of dynein intermediate chain (DIC) and dynein functions. Furthermore, AMPK phosphorylates DIC at Ser81. Expression of a phospho-resistant mutant of DIC retards neuronal migration in a similar way to AMPK depletion. Conversely, expression of the phospho-mimetic mutant of DIC alleviates impaired neuronal migration caused by AMPK depletion. Thus, AMPK-regulated dynein function via Ser81 DIC phosphorylation is crucial for radial neuronal migration.
|
Development (Cambridge, England)
| 2,020
| 7
| 0
| 0
|
33,022,853
|
Are attention deficit hyperactivity disorder symptoms stable irrespective of recovery from eating disorders? A 1-year follow-up of adult females.
|
To explore the influence of recovery from eating disorders (ED) at 1-year follow-up on self-reported attention deficit hyperactivity disorder (ADHD) symptoms in an unselected group of patients in a specialized ED clinic.
|
European eating disorders review : the journal of the Eating Disorders Association
| 2,021
| 1
| 0
| 0
|
22,395,655
|
Stimulation of the subthalamic nucleus improves velocity of ballistic movements in Parkinson's disease.
|
High-frequency stimulation of the subthalamic nucleus can markedly improve motor function in patients with Parkinson's disease. However, the underlying mechanisms mediating these improvements are not well understood. In particular, whether motor function is differentially improved in distal or proximal movements is not fully determined. Also, whether reaction time is improved along with other motor parameters is still a matter of debate. Here, we test patients OFF and ON subthalamic nucleus stimulation by capturing simple ballistic movements across four joints using kinematic motion analysis. We show that velocity, but not reaction time, is significantly improved with stimulation. There was no strong differential effect between joints. These results add evidence that deep brain stimulation of the subthalamic nucleus can enhance performance of ballistic movements in Parkinson's disease, and demonstrate that the subthalamic nucleus may be important in driving parameters of motor control after the response has been initiated.
|
Neuroreport
| 2,012
| 4
| 0
| 0
|
32,866,474
|
High temperature stress response is not sexually dimorphic at the whole-body level and is dependent on androgens to induce sex reversal.
|
The understanding of the molecular and endocrine mechanisms behind environmentally-induced sex reversal in fish is of great importance in the context of predicting the potential effects of climate change, especially increasing temperature. Here, we demonstrate the global effects of high temperature on genome-wide transcription in medaka (Oryzias latipes) during early development. Interestingly, data analysis did not show sexual dimorphic changes, demonstrating that thermal stress is not dependent on genotypic sex. Additionally, our results revealed significant changes in several pathways under high temperature, such as stress response from brain, steroid biosynthesis, epigenetic mechanisms, and thyroid hormone biosynthesis, among others. These microarray data raised the question of what the exact molecular and hormonal mechanisms of action are for female-to-male sex reversal under high temperatures in fish. Complementary gene expression analysis revealed that androgen-related genes increase in females (XX) experiencing high water temperature. To test the involvement of androgens in thermal-induced sex reversal, an androgen antagonist was used to treat XX medaka under a high-temperature setup. Data clearly demonstrated failure of female-to-male sex reversal when androgen action is inhibited, corroborating the importance of androgens in environmentally-induced sex reversal.
|
General and comparative endocrinology
| 2,020
| 12
| 0
| 0
|
32,535,480
|
Predictors of family accommodation in obsessive compulsive disorder.
|
Family accommodation (FA) has been consistently recognized as a predictor of treatment outcome in obsessive-compulsive disorder (OCD). However, the factors determining FA are not clearly understood, especially in adult patients with OCD. We recruited a consecutive sample of predominantly adult subjects (n=100), who presented to the specialty OCD Clinic with a primary diagnosis of OCD along with a suitable caregiver. Patient and family members completed measurements assessing FA along with other clinical variables of interest. Clinical variables found statistically significant in bivariate analyses (p < 0.05) were examined in multivariate linear regression analysis to determine the predictors of FA. Age, gender and marital status of the patient, contamination symptom dimension, severity of avoidance, severity scores on Yale-Brown Obsessive Compulsive Scale (Y-BOCS) and scores on work and social adjustment scale were associated with FA in bivariate analysis. In multiple regression analysis, contamination dimension, the severity of avoidance, relationship of caregiver and poorer work and social adjustment predicted FA. Patients with poor socio-occupational functioning, severe avoidance, caregiver being spouse and contamination related symptoms are accommodated more by family members. Screening and management of FA, particularly in patients with the contamination dimension may thus help improve treatment outcome.
|
Asian journal of psychiatry
| 2,020
| 10
| 0
| 0
|
33,732,800
|
Immuno-electrophysiology on Neuromuscular Junctions of Drosophila Third Instar Larva.
|
Alterations in synaptic transmission are critical early events in neuromuscular disorders. However, reliable methodologies to analyze the functional organization of the neuromuscular synapses are still needed. This manuscript provides a detailed protocol to analyze the molecular assembly of the neuromuscular synapses through immune-electrophysiology in
|
Bio-protocol
| 2,021
| 2
| 0
| 0
|
25,147,677
|
Down Regulation of ackA-pta Pathway in Escherichia coli BL21 (DE3): A Step Toward Optimized Recombinant Protein Expression System.
|
One of the most important problems in production of recombinant protein is to attain over-expression of the target gene and high cell density. In such conditions, the secondary metabolites of bacteria become toxic for the medium and cause cells to die. One of these aforementioned metabolites is acetate, which enormously accumulated in the medium, so that both cell and protein yields are affected.
|
Jundishapur journal of microbiology
| 2,014
| 2
| 0
| 0
|
33,202,601
|
Frailty Assessment in Clinical Practice: Opportunity in the Midst of a Pandemic.
|
Emerging evidence from studies of older adults hospitalised with COVID-19 suggests that there is a high prevalence of frailty in this patient group. We reflect on the measurement of frailty in older patients hospitalized as an emergency and the translation of frailty from a research to a clinical concept. We consider whether, despite the contemporary challenges in the care of older adults as a result of COVID-19, there are opportunities for care quality improvement during a pandemic.
|
Geriatrics (Basel, Switzerland)
| 2,020
| 11
| 0
| 0
|
33,181,147
|
Interaction of chronic intermittent ethanol and repeated stress on structural and functional plasticity in the mouse medial prefrontal cortex.
|
Stress is a risk factor that plays a considerable role in the development and maintenance of alcohol (ethanol) abuse and relapse. Preclinical studies examining ethanol-stress interactions have demonstrated elevated ethanol drinking, cognitive deficits, and negative affective behaviors in mice. However, the neural adaptations in prefrontal cortical regions that drive these aberrant behaviors produced by ethanol-stress interactions are unknown. In this study, male C57BL/6J mice were exposed to chronic intermittent ethanol (CIE) and repeated forced swim stress (FSS). After two cycles of CIE x FSS, brain slices containing the prelimbic (PrL) and infralimbic (IfL) cortex were prepared for analysis of adaptations in dendritic spines and synaptic plasticity. In the PrL cortex, total spine density was increased in mice exposed to CIE. Immediately following induction of long-term potentiation (LTP), the fEPSP slope was increased in the PrL of CIE x FSS treated mice, indicative of a presynaptic adaptation on post-tetanic potentiation (PTP). In the IfL cortex, CIE exposure regardless of FSS experience resulted in an increase in spine density. FSS alone or when combined with CIE exposure increased PTP following LTP induction. Repeated FSS episodes increased IfL cortical paired-pulse facilitation, a second measure of presynaptic plasticity. In summary, CIE exposure resulted in structural adaptations while repeated stress exposure drove metaplastic changes in presynaptic function, demonstrating distinct morphological and functional changes in PrL and IfL cortical neurons. Thus, the structural and functional adaptations may be one mechanism underlying the development of excessive drinking and cognitive deficits associated with ethanol-stress interactions.
|
Neuropharmacology
| 2,021
| 1
| 0
| 0
|
32,663,794
|
Evaluation of emotional intelligence (EI) in neuromyelitis optica spectrum disorder (NMOSD) patients compared to healthy individuals.
|
Neuromyelitis optica spectrum disorder (NMOSD) is known as an autoimmune astrocytopathic disorder involving central nervous system (CNS). The aim of this study was to compare Emotional Intelligence (EI) score between NMOSD patients and healthy individuals, and to find out the possible effect of this disease on EI.
|
Multiple sclerosis and related disorders
| 2,020
| 10
| 0
| 0
|
18,436,510
|
[Neurology of cognition and language in the publications of Kálmán Sántha and today].
|
Based on histopathological investigation of the brain of exceptionally talented persons Sántha found increased volume of parietal association areas with abundance of cells. He supposed that the angular gyrus may be a "memory field". In his publication Genius and inheritance he expressed that: "Talent is a child of the present, but the genius is born for eternity." He discussed the localization of sensory and motor amnestic aphasia analysing the signs of patient with brain tumor and called attention to concomitant psychological symptoms. He found crossed aphasia in twice as many lefthanded than righthanded persons. This may explain the recent observations that the restitution of aphasia is predetermined; speech ability of ambidexterous or latent lefthanded persons improve better. He analysed the topography of emotional and voluntary facial palsy. The currently accepted hierarchical concept of mental and speech ability can be derived from the ouevre of Sántha and his predecessors. Sántha can be honoured as a forerunner of the modern theories of aphasia localization.
|
Orvosi hetilap
| 2,008
| 5
| 0
| 0
|
28,330,568
|
[Evaluation of healing time of osteochemonecrosis of the jaw after surgery: Single-center retrospective study and review of the literature].
|
Osteochemonecrosis of the jaw (ONJ) is a chronic ischemic bone exposure. It has an increasing incidence. ONJ is mainly related to bisphosphonate and denosumab therapies in oncologic settings. Healing is considered uncertain ad as occurring slowly. International recommendations suggest to treat ONJ symptomatically in a first attempt. A surgical procedure, potentially aggressive, should be carefully weight up in patients in poor condition and whose life expectancy is often limited. However, surgical treatment seems to allow for a high rate of clinical remission. Postoperative remission periods, when mentioned in the studies, are disparate. The aim of our study was to clarify the remission period of ONJ after surgical management.
|
Journal of stomatology, oral and maxillofacial surgery
| 2,017
| 2
| 0
| 0
|
25,653,826
|
Characteristics of bipolar disorder patients treated with immediate- and extended-release quetiapine in a real clinical setting: a longitudinal, cohort study of 1761 patients.
|
The objective of this work was to study characteristics and clinical treatment patterns of bipolar disorder (BD) patients admitted to hospital and treated with quetiapine (immediate-release [IR] or extended-release [XR] formulations).
|
Therapeutic advances in psychopharmacology
| 2,015
| 2
| 0
| 0
|
32,622,070
|
Young children's prosocial responses toward peers and adults in two social contexts.
|
Young children help and share with others, but little is known about the "how" and "who" of this early prosocial behavior. In the current study, we compared 2- and 3-year-old children's (N = 203; 101 girls) prosocial behavior of sharing and helping. We asked whether the process was different (a) if the social partner was an adult or a same-age peer and (b) if the child was actively interacting and engaged with the partner or not. The highest prosocial responses were found in bilateral joint tasks such as sharing the spoils after a collaborative effort and helping a partner finish a mutual activity. Prosocial responses were lower in unilateral autonomous tasks such as assisting another person in opening a locked box and distributing a windfall of resources. Children did not show an overall preference for helping or sharing with adults versus peers except that they were more likely to support a peer than an adult in an instrumental helping task. Together, these findings suggest that toddlers' early prosocial skills and motivations are more sensitive to how toddlers are engaged with a partner than to who that partner is, implying that children have a nondiscriminatory general inclination to benefit others, especially in bilateral interactive scenarios.
|
Journal of experimental child psychology
| 2,020
| 10
| 0
| 0
|
27,831,473
|
Sam Wang.
|
Sam Wang is a pioneer in using statistical methods to analyze U.S. presidential election polls. In this election season interview with Neuron, he discusses diagnosing partisan gerrymandering, his research on the cerebellum, and how he analyzes polls with high accuracy.
|
Neuron
| 2,016
| 10
| 0
| 0
|
30,980,505
|
Gentle Perineal Skin Stimulation for Control of Nocturia.
|
One of the major causes of nocturia is overactive bladder (OAB). Somatic afferent nerve stimuli are used for treating OAB. However, clinical evidence for the efficacy of this treatment is insufficient due to the lack of appropriate control stimuli. Studies on anesthetized animals, which eliminate emotional factors and placebo effects, have demonstrated an influence of somatic stimuli on urinary bladder functions and elucidated the underlying mechanisms. In general, the effects of somatic stimuli are dependent on the modality, location, and physical characteristics of the stimulus. Recently we showed that gentle stimuli applied to the perineal skin using a soft elastomer roller inhibited micturition contractions to a greater extent than a roller with a hard surface. Studies aiming to elucidate the neural mechanisms of gentle stimulation-induced inhibition reported that 1-10 Hz discharges of low-threshold cutaneous mechanoreceptive Aβ, Aδ, and C fibers evoked during stimulation with an elastomer roller inhibited the micturition reflex by activating the spinal cord opioid system, thereby reducing both ascending and descending transmission between bladder and pontine micturition center. The present review will provide a brief summary of (1) the effect of somatic electrical stimulation on the micturition reflex, (2) the effect of gentle mechanical skin stimulation on the micturition reflex, (3) the afferent, efferent, and central mechanisms underlying the effects of gentle stimulation, and (4) a translational clinical study demonstrating the efficacy of gentle skin stimuli for treating nocturia in the elderly with OAB by using the two roller types inducing distinct effects on rat micturition contractions. Anat Rec, 302:1824-1836, 2019. © 2019 American Association for Anatomy.
|
Anatomical record (Hoboken, N.J. : 2007)
| 2,019
| 10
| 0
| 0
|
32,480,313
|
Network dynamics underlie learning and performance of birdsong.
|
Understanding the sensorimotor control of the endless variety of human speech patterns stands as one of the apex problems in neuroscience. The capacity to learn - through imitation - to rapidly sequence vocal sounds in meaningful patterns is clearly one of the most derived of human behavioral traits. Selection pressure produced an analogous capacity in numerous species of vocal-learning birds, and due to an increasing appreciation for the cognitive and computational flexibility of avian cortex and basal ganglia, a general understanding of the forebrain network that supports the learning and production of birdsong is beginning to emerge. Here, we review recent advances in experimental studies of the zebra finch (Taeniopygia guttata), which offer new insights into the network dynamics that support this surprising analogue of human speech learning and production.
|
Current opinion in neurobiology
| 2,020
| 10
| 0
| 0
|
33,451,677
|
Emerging Domain-Based Treatments for Pediatric Anxiety Disorders.
|
Domain-specific cognitive training treatments for pediatric anxiety disorders rely on accurate and reliable identification of specific underlying deficits and biases in neurocognitive functions. Once identified, such biases can serve as specific targets for therapeutic intervention. Clinical translations typically reflect mechanized training protocols designed to rectify the identified biases. Here, we review and synthesize research on key neurocognitive processes that emerge as potential targets for specialized cognitive training interventions in pediatric anxiety disorders in the domains of attention, interpretation, error monitoring, working memory, and fear learning. For each domain, we describe the current status of target establishment (i.e., an association between pediatric anxiety and a specific neurocognitive process), and then review extant translational efforts regarding these targets and the evidence supporting their clinical utility in youths. We then localize each of the domains within the path leading to efficacious, evidence-supported treatments for pediatric anxiety, providing a roadmap for future research. The review indicates that specific cognitive targets in pediatric anxiety have been established in all the reviewed domains except for fear learning, where a clear target is yet to be elucidated. In contrast, evidence for clinical efficacy emerged only in the threat-related attention domain, with some preliminary findings in the domains of interpretation and working memory. The path to clinical translation in the domain of error monitoring is yet unclear. Implications and potential avenues for future research and translation are discussed.
|
Biological psychiatry
| 2,021
| 4
| 0
| 0
|
33,050,239
|
Evaluation of Chromosome Microarray Analysis in a Large Cohort of Females with Autism Spectrum Disorders: A Single Center Italian Study.
|
Autism spectrum disorders (ASD) encompass a heterogeneous group of neurodevelopmental disorders resulting from the complex interaction between genetic and environmental factors. Thanks to the chromosome microarray analysis (CMA) in clinical practice, the accurate identification and characterization of submicroscopic deletions/duplications (copy number variants, CNVs) associated with ASD was made possible. However, the widely acknowledged excess of males on the autism spectrum reflects on a paucity of CMA studies specifically focused on females with ASD (f-ASD). In this framework, we aim to evaluate the frequency of causative CNVs in a single-center cohort of idiopathic f-ASD. Among the 90 f-ASD analyzed, we found 20 patients with one or two potentially pathogenic CNVs, including those previously associated with ASD (located at 16
|
Journal of personalized medicine
| 2,020
| 10
| 0
| 0
|
32,845,208
|
Nicotine evoked efferent transmitter release onto immature cochlear inner hair cells.
|
Olivocochlear neurons make temporary cholinergic synapses on inner hair cells of the rodent cochlea in the first 2 to 3 wk after birth. Repetitive stimulation of these efferent neurons causes facilitation of evoked release and increased spontaneous release that continues for seconds to minutes. Presynaptic nicotinic acetylcholine receptors (nAChRs) are known to modulate neurotransmitter release from brain neurons. The present study explores the hypothesis that presynaptic nAChRs help to increase spontaneous release from efferent terminals on cochlear hair cells. Direct application of nicotine (which does not activate the hair cells' α9α10-containing nAChRs) produces sustained efferent transmitter release, implicating presynaptic nAChRs in this response. The effect of nicotine was reduced by application of ryanodine that reduces release of calcium from intraterminal stores.
|
Journal of neurophysiology
| 2,020
| 11
| 0
| 0
|
33,988,142
|
COVID-19 … What are drugs and strategies now?
|
From February 2019 the World faces the Covid19 pandemic. The data in our possession are still insufficient to effectively combat this pathology. The gold standard for diagnosis remains molecular testing, while clinical and instrumental and serological diagnostics are highly nonspecific leading to a slowdown in the battle against covid19.[3] Can Artificial Intelligence (AI) and Machine Learning (ML) help us? The use of large databases to cross-reference data to stratify the diagnostic scores, to quickly differentiate a critical Covid-19 patient from a non-critical one is the challenge of the future. All to achieve better management of resources in the field and a more effective therapeutic approach.[2].
|
Acta bio-medica : Atenei Parmensis
| 2,021
| 5
| 0
| 0
|
24,938,384
|
Association of Lhermitte-Duclos disease and split cord malformation in a child.
|
Lhermitte-Duclos disease (LDD) or cerebellar gangliocytoma is a rare pathological entity, the etiology of which remains controversial. Numerous developmental anomalies are known to be associated with LDD, but the association between LDD and split cord malformation (SCM) has not been reported to our knowledge. We report LDD in a 3-year-old girl in whom repetitive urinary tract infections led to the diagnosis of a neurogenic bladder. Thorough screening revealed a SCM at the thoracic level which was surgically repaired. The pathogenesis of this entity and management strategies are discussed in this paper.
|
Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia
| 2,014
| 11
| 0
| 0
|
29,363,341
|
Physiotherapy treatment of the diabetic shoulder: health-related quality of life and measures of shoulder function regarding patients with type 1 diabetes.
|
The aim of this study was to investigate how health-related quality of life (HRQoL) and functional shoulder range of motion are affected among patients with diabetes with shoulder problems, treated with a specific physiotherapy programme. A further aim was to investigate how health-related quality of life, functional shoulder range of motion, pain intensity, and shoulder function correlate within the group of patients after the treatment period.
|
Disability and rehabilitation
| 2,019
| 6
| 0
| 0
|
32,592,228
|
Brain structural connectome in relation to PRRT2 mutations in paroxysmal kinesigenic dyskinesia.
|
This study explored the topological characteristics of brain white matter structural networks in patients with Paroxysmal Kinesigenic Dyskinesia (PKD), and the potential influence of the brain network stability gene PRRT2 on the structural connectome in PKD. Thirty-five PKD patients with PRRT2 mutations (PKD-M), 43 PKD patients without PRRT2 mutations (PKD-N), and 40 demographically-matched healthy control (HC) subjects underwent diffusion tensor imaging. Graph theory and network-based statistic (NBS) approaches were performed; the topological properties of the white matter structural connectome were compared across the groups, and their relationships with the clinical variables were assessed. Both disease groups PKD-M and PKD-N showed lower local efficiency (implying decreased segregation ability) compared to the HC group; PKD-M had longer characteristic path length and lower global efficiency (implying decreased integration ability) compared to PKD-N and HC, independently of the potential effects of medication. Both PKD-M and PKD-N had decreased nodal characteristics in the left thalamus and left inferior frontal gyrus, the alterations being more pronounced in PKD-M patients, who also showed abnormalities in the left fusiform and bilateral middle temporal gyrus. In the connectivity characteristics assessed by NBS, the alterations were more pronounced in the PKD-M group versus HC than in PKD-N versus HC. As well as the white matter alterations in the basal ganglia-thalamo-cortical circuit related to PKD with or without PRRT2 mutations, findings in the PKD-M group of weaker small-worldness and more pronounced regional disturbance show the adverse effects of PRRT2 gene mutations on brain structural connectome.
|
Human brain mapping
| 2,020
| 10
| 0
| 0
|
32,770,351
|
Combining the intersubject correlation analysis and the multivariate distance matrix regression to evaluate associations between fNIRS signals and behavioral data from ecological experiments.
|
The development of methods to analyze data acquired using functional near-infrared spectroscopy (fNIRS) in experiments similar to real-life situations is of great value in modern applied neuroscience. One of the most used methods to analyze fNIRS signals consists of the application of the general linear model on the observed hemodynamic signals. However, it implies limitations on the experimental design that must be constrained by triggers related to the stimuli protocols (such as block design or event related). In this work, a novel methodology is proposed to overcome such restrictions and allow more flexible protocols. The method combines the intersubject correlation analysis and the multivariate distance matrix regression to evaluate the brain-behavior relationship of subjects submitted to experiments with no trigger-based protocols. Its applicability is demonstrated throughout a naturalistic experiment about emotions conveyed by music. Thirty-two participants freely listened to instrumental excerpts from the operatic repertoire and reported the valences of the emotions conveyed by the musical segments. The method was able to find a statistically significant correlation between the subjects' fNIRS signals and valences of their emotional responses, for the excerpt that evoked the most negative valence. This result illustrates the potential of this approach as an alternative method to analyze fNIRS signals from experiments in which block design or task-related paradigms might not be suitable.
|
Experimental brain research
| 2,020
| 10
| 0
| 0
|
32,572,621
|
Late-onset post-lesional paroxysmal hypothermia: a case series and literature review.
|
Paroxysmal hypothermia (PH) is a rare condition characterized by recurrent episodes of spontaneous hypothermia, bradycardia, disorders of consciousness and, in some cases, hyperhidrosis. When associated with a detectable hypothalamic lesion, PH episodes usually occur shortly after the brain insult.
|
Journal of neurology
| 2,020
| 11
| 0
| 0
|
33,203,439
|
Are neuropsychiatric symptoms in dementia linked to CSF biomarkers of synaptic and axonal degeneration?
|
The underlying disease mechanism of neuropsychiatric symptoms (NPS) in dementia remains unclear. Cerebrospinal fluid (CSF) biomarkers for synaptic and axonal degeneration may provide novel neuropathological information for their occurrence. The aim was to investigate the relationship between NPS and CSF biomarkers for synaptic (neurogranin [Ng], growth-associated protein 43 [GAP-43]) and axonal (neurofilament light [NFL]) injury in patients with dementia.
|
Alzheimer's research & therapy
| 2,020
| 11
| 0
| 0
|
28,950,685
|
Need for Registration and Reporting of Acupuncture Trials in Parkinson's Disease in Korea.
|
Many people dealing with Parkinson's disease (PD) turn to complementary and alternative medicine when searching for a cure or relief from symptoms. Acupuncture is widely used in the Korean PD population to alleviate symptoms and in hopes of curing the illness. However, acupuncture use for PD patients has only recently begun to be studied scientifically and is still considered an unproven treatment for PD. Therefore, there is an urgent need for acupuncture to be studied, validated and used for PD. Thus, our study's aim is to examine how many acupuncture studies in PD are registered and reported in Korea.
|
Journal of movement disorders
| 2,017
| 9
| 0
| 0
|
33,743,604
|
Need of guidance in disabling and chronic migraine identification in the primary care setting, results from the european MyLife anamnesis survey.
|
Migraine affects 80.8 million people in Western Europe and is the first cause of disability among people between ages 15 and 49 worldwide. Despite being a highly prevalent and disabling condition, migraine remains under-diagnosed and poorly managed.
|
BMC family practice
| 2,021
| 3
| 0
| 0
|
32,329,276
|
[Spike protein in the detection and treatment of novel coronavirus].
|
Recently a COVID-19 pneumonia pandemic caused by a novel coronavirus 2019-nCoV has broken out over the world. In order to better control the spread of the pandemic, there's an urgent need to extensively study the virus' origin and the mechanisms for its infectivity and pathogenicity. Spike protein is a special structural protein on the surface of coronavirus. It contains important information about the evolution of the virus and plays critical roles in the processes of cellular recognition and entry. In the past decades, spike protein has always been one of the most important objects in research works on coronaviruses closely related to human life. In this review we introduce these research works related to spike proteins, hoping it will provide reasonable ideas for the control of the current pandemic, as well as for the diagnosis and treatment of COVID-19.
|
Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi
| 2,020
| 4
| 0
| 0
|
30,348,966
|
A role for genes in the 'caregiver stress process'?
|
The stress that accompanies caring for one's parent, and the contribution of that stress to adverse physical and mental-health outcomes, is extensively studied and widely acknowledged. Yet there has been almost no attempt to incorporate the well-documented role of genetic variation in psychological distress into research on caregiving. We use phenotypic data from a large, population-based sample linked to extensive genotype data to develop a polygenic risk score (PRS) for depression, and test for both direct and interactive effects of the PRS in a multilevel repeat-measures model of caregiver-related stress. We distinguish three groups: potential caregivers (those with a living parent who does not need care), noncaregivers (those who do not provide care to their parent that needs care), and caregivers. We also obtain separate estimates according to the gender of both the parent and child. We found that a parent's need for care, and the child's provision of care, are associated with depression in some but not all cases; in contrast the PRS was significantly associated with the risk for increased depressive symptoms (with P ≤ 0.01) in all cases. These findings support an additive genetic contribution to the diathesis-stress model of depression in the context of caregiving.
|
Translational psychiatry
| 2,018
| 10
| 0
| 0
|
28,829,371
|
Taking Behavioral Sciences Forward.
|
It has been almost one year now since I agreed to become the Editor-in-Chief for this important open access journal, for which I have served as a member of the editorial board since its early inception.[...].
|
Behavioral sciences (Basel, Switzerland)
| 2,017
| 8
| 0
| 0
|
26,993,630
|
Neurokinin-3 Receptor Binding in Guinea Pig, Monkey, and Human Brain: In Vitro and in Vivo Imaging Using the Novel Radioligand, [18F]Lu AF10628.
|
Previous autoradiography studies have suggested a marked interspecies variation in the neuroanatomical localization and expression levels of the neurokinin 3 receptor, with high density in the brain of rat, gerbil, and guinea pig, but at the time offered no conclusive evidence for its presence in the human brain. Hitherto available radioligands have displayed low affinity for the human neurokinin 3 receptor relative to the rodent homologue and may thus not be optimal for cross-species analyses of the expression of this protein.
|
The international journal of neuropsychopharmacology
| 2,016
| 8
| 0
| 0
|
29,860,021
|
Aphonogelia After Recovery From Severe Traumatic Brain Injury: A Case Report.
|
During rehabilitation from a severe traumatic brain injury, a 16-year-old girl became aware that she had lost the ability to laugh out loud. This rare phenomenon previously has been described as "aphonogelia." A discussion of therapeutic avenues that were explored with this patient is presented in the first case, to our knowledge, of aphonogelia after a traumatic brain injury. LEVEL OF EVIDENCE: V.
|
PM & R : the journal of injury, function, and rehabilitation
| 2,019
| 1
| 0
| 0
|
32,939,422
|
Movement assay for the undergraduate neuroscience laboratory.
|
Described is a design for easy-to-construct apparatus that measures movement of flying insects suitable for the undergraduate teaching laboratory. The system does not require the purchase of specialized scientific equipment or software. The apparatus can be constructed and operated without advanced knowledge in electronics or programming. The goal of this apparatus was to expand upon previous research detecting insect flight in response to radiation. We improved upon the quantification and resolution of flight across differing intensities of white light. All of this was achieved using low-cost and commonly available materials and open-source software to collect and analyze data. The only substantial prerequisites for this design are a PC with a 3.5 mm microphone input and an understanding of basic electrical connections. The apparatus was validated with comparative physiological data from two different species of butterfly.
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HardwareX
| 2,020
| 4
| 0
| 0
|
33,207,212
|
The Dueling Duo: IL10 and TNF Face Off in Microglial Recovery from Endotoxin Challenge.
|
The molecular mechanisms that restore microglial quiescence after acute stimulation remain largely unexplored, unlike those that drive microglial activation. In this issue of Immunity, Shemer et al. discover that the microglial IL-10 receptor counteracts the pro-inflammatory effects of TNF to allow restoration of microglial quiescence after peripheral endotoxin challenge.
|
Immunity
| 2,020
| 11
| 0
| 0
|
32,558,380
|
D-Peptide Builder: A Web Service to Enumerate, Analyze, and Visualize the Chemical Space of Combinatorial Peptide Libraries.
|
Peptide-based drug discovery is re-gaining attention in drug discovery. Similarly, combinatorial chemistry continues to be a useful technique for the rapid exploration of chemical space. A current challenge, however, is the enumeration of combinatorial peptide libraries using freely accessible tools. To facilitate the swift enumeration of combinatorial peptide libraries, we introduce herein D-Peptide Builder. In the current version, the user can build up to pentapeptides, linear or cyclic, using the natural pool of 20 amino acids. The user can use non- and/or N-methylated amino acids. The server also enables the rapid visualization of the chemical space of the newly enumerated peptides in comparison with other libraries relevant to drug discovery and preloaded in the server. D-Peptide Builder is freely accessible at http://dpeptidebuilder. quimica.unam.mx:4000/. It is also accessible through the open D-Tools platform (DIFACQUIM Tools for Chemoinformatics https://www.difacquim.com/d-tools/).
|
Molecular informatics
| 2,020
| 11
| 0
| 0
|
33,811,950
|
TNF signaling via TNF receptors does not mediate the effects of short-term exercise on cognition, anxiety and depressive-like behaviors in middle-aged mice.
|
We recently reported that tumor necrosis factor (TNF) signaling via the TNFR1 and TNFR2 receptors mediates the effects of long-term exercise on locomotion, cognition and anxiety, but not depressive-like behavior. We now investigated whether the TNF signaling via its receptors also mediates the effects of short-term exercise on cognition, anxiety and depressive-like behaviors.
|
Behavioural brain research
| 2,021
| 6
| 0
| 0
|
32,942,119
|
Off-label use of tocilizumab in neuromyelitis optica spectrum disorders and MOG-antibody-associated diseases: A case-series.
|
The objective of the study was to evaluate the indication, efficacy and safety of tocilizumab, a humanized anti-interleukin-6 receptor antibody, in patients with neuromyelitis optica spectrum disorders (NMOSD) and myelin oligodendrocyte glycoprotein antibody associated diseases (MOGAD) encountered in current neurological practice.
|
Multiple sclerosis and related disorders
| 2,020
| 11
| 0
| 0
|
33,346,052
|
Neuroendocrine Dysfunction in the Acute Setting of Penetrating Brain Injury: A Systematic Review.
|
Data on neuroendocrine dysfunction (NED) in the acute setting of penetrating brain injury (PBI) are scarce, and the clinical approach to diagnosis and treatment remains extrapolated from the literature on blunt head trauma.
|
World neurosurgery
| 2,021
| 3
| 0
| 0
|
33,262,369
|
Control of response interference: caudate nucleus contributes to selective inhibition.
|
While the role of cortical regions in cognitive control processes is well accepted, the contribution of subcortical structures (e.g., the striatum), especially to the control of response interference, remains controversial. Therefore, the present study aimed to investigate the cortical and particularly subcortical neural mechanisms of response interference control (including selective inhibition). Thirteen healthy young participants underwent event-related functional magnetic resonance imaging while performing a unimanual version of the Simon task. In this task, successful performance required the resolution of stimulus-response conflicts in incongruent trials by selectively inhibiting interfering response tendencies. The behavioral results show an asymmetrical Simon effect that was more pronounced in the contralateral hemifield. Contrasting incongruent trials with congruent trials (i.e., the overall Simon effect) significantly activated clusters in the right anterior cingulate cortex, the right posterior insula, and the caudate nucleus bilaterally. Furthermore, a region of interest analysis based on previous patient studies revealed that activation in the bilateral caudate nucleus significantly co-varied with a parameter of selective inhibition derived from distributional analyses of response times. Our results corroborate the notion that the cognitive control of response interference is supported by a fronto-striatal circuitry, with a functional contribution of the caudate nucleus to the selective inhibition of interfering response tendencies.
|
Scientific reports
| 2,020
| 12
| 0
| 0
|
32,797,165
|
Length of Hospital Stay for Hip Fracture and 30-Day Mortality in People With Alzheimer's Disease: A Cohort Study in Finland.
|
Persons with Alzheimer's disease (AD) are at higher risk of hip fractures (HFs) than general older population and have worse prognosis after HF. Hospital stays after HF have shortened along time. We investigated the association between length of hospital stay after HF and mortality after discharge among persons with AD.
|
The journals of gerontology. Series A, Biological sciences and medical sciences
| 2,020
| 10
| 0
| 0
|
32,993,551
|
A web based dynamic MANA Nomogram for predicting the malignant cerebral edema in patients with large hemispheric infarction.
|
For large hemispheric infarction (LHI), malignant cerebral edema (MCE) is a life-threatening complication with a mortality rate approaching 80%. Establishing a convenient prediction model of MCE after LHI is vital for the rapid identification of high-risk patients as well as for a better understanding of the potential mechanism underlying MCE.
|
BMC neurology
| 2,020
| 9
| 0
| 0
|
30,160,507
|
Acetaminophen disrupts memory in object recognition and increases extracellular signal-regulated kinase phosphorylation in male mice.
|
Acetaminophen (also known as paracetamol) is a commonly used over-the-counter pain medication, but recent evidence suggests that a single exposure or prenatal exposure may have significant behavioral effects. This investigation aimed to determine whether acetaminophen could disrupt memory formation in an object-recognition task and to quantify potential changes in memory-related signaling cascades in the hippocampus of mice after acetaminophen administration. Using male mice, we examined the effect of a single subcutaneous injection of acetaminophen on the object-recognition task, a single-trial, hippocampus-dependent memory task. We also investigated potential changes in the activation of extracellular signal-regulated kinase (ERK) in the dorsal mouse hippocampus 1 hr after a subcutaneous injection of acetaminophen. We found that 50 mg/kg and 100 mg/kg interfered with performance in the object-recognition memory task, whereas 10 mg/kg did not. We also found that a single 50 mg/kg injection of acetaminophen significantly increased p42 ERK phosphorylation in the dorsal mouse hippocampus. Overall, these results suggest that a single dose of acetaminophen can have significant effects on memory and alters signaling kinases critical for memory consolidation. Further work is needed to determine the involved mechanisms. (PsycINFO Database Record (c) 2018 APA, all rights reserved).
|
Behavioral neuroscience
| 2,018
| 12
| 0
| 0
|
33,229,564
|
Synaptotagmin-7 deficiency induces mania-like behavioral abnormalities through attenuating GluN2B activity.
|
Synaptotagmin-7 (Syt7) probably plays an important role in bipolar-like behavioral abnormalities in mice; however, the underlying mechanisms for this have remained elusive. Unlike antidepressants that cause mood overcorrection in bipolar depression,
|
Proceedings of the National Academy of Sciences of the United States of America
| 2,020
| 12
| 0
| 0
|
30,562,529
|
Neuroscience: To Eat or to Sleep?
|
Energy and sleep homeostasis are entwined, each capable of exerting priority based on need. The identification of central nodes involved in the appropriate orchestration of these systems is critical to our understanding of how the brain regulates behavior.
|
Current biology : CB
| 2,018
| 12
| 0
| 0
|
32,502,669
|
Quantifying uncertainty in brain-predicted age using scalar-on-image quantile regression.
|
Prediction of subject age from brain anatomical MRI has the potential to provide a sensitive summary of brain changes, indicative of different neurodegenerative diseases. However, existing studies typically neglect the uncertainty of these predictions. In this work we take into account this uncertainty by applying methods of functional data analysis. We propose a penalised functional quantile regression model of age on brain structure with cognitively normal (CN) subjects in the Alzheimer's Disease Neuroimaging Initiative (ADNI), and use it to predict brain age in Mild Cognitive Impairment (MCI) and Alzheimer's Disease (AD) subjects. Unlike the machine learning approaches available in the literature of brain age prediction, which provide only point predictions, the outcome of our model is a prediction interval for each subject.
|
NeuroImage
| 2,020
| 10
| 0
| 0
|
32,561,476
|
Rapid changes in brain activity during learning of grapheme-phoneme associations in adults.
|
Learning to associate written letters with speech sounds is crucial for the initial phase of acquiring reading skills. However, little is known about the cortical reorganization for supporting letter-speech sound learning, particularly the brain dynamics during the learning of grapheme-phoneme associations. In the present study, we trained 30 Finnish participants (mean age: 24.33 years, SD: 3.50 years) to associate novel foreign letters with familiar Finnish speech sounds on two consecutive days (first day ~ 50 min; second day ~ 25 min), while neural activity was measured using magnetoencephalography (MEG). Two sets of audiovisual stimuli were used for the training in which the grapheme-phoneme association in one set (Learnable) could be learned based on the different learning cues provided, but not in the other set (Control). The learning progress was tracked at a trial-by-trial basis and used to segment different learning stages for the MEG source analysis. The learning-related changes were examined by comparing the brain responses to Learnable and Control uni/multi-sensory stimuli, as well as the brain responses to learning cues at different learning stages over the two days. We found dynamic changes in brain responses related to multi-sensory processing when grapheme-phoneme associations were learned. Further, changes were observed in the brain responses to the novel letters during the learning process. We also found that some of these learning effects were observed only after memory consolidation the following day. Overall, the learning process modulated the activity in a large network of brain regions, including the superior temporal cortex and the dorsal (parietal) pathway. Most interestingly, middle- and inferior-temporal regions were engaged during multi-sensory memory encoding after the cross-modal relationship was extracted from the learning cues. Our findings highlight the brain dynamics and plasticity related to the learning of letter-speech sound associations and provide a more refined model of grapheme-phoneme learning in reading acquisition.
|
NeuroImage
| 2,020
| 10
| 0
| 0
|
23,279,992
|
[Are variations of structural neuro-anatomy promising endophenotype candidates in bipolar disorder?].
|
Bipolar disorder is a complex pathology which has a strong heritability component. Epidemiologic studies have pinpointed the contribution of genetic factors to the heritability component. The molecular studies, that have used classical genetic approaches, have been inconclusive at indentifying genes involved in the etiology of this disorder. To overcome these difficulties, a number of strategies have been developed. One of them is the endophenotypic approach. Its main scope is to identify biological markers that are influenced by genetic factors that are less complex than those involved in the clinical expression of the disorder. Thus, it is likely these markers will be more readily linked to specific genetic loci. In this article, we describe the main phenotypes of neuro-anatomic measurements that are widely used in research, and report data on their heritability in the general population. Then, we focus on the results of the few structural neuro-imaging studies that have been carried out in families of patients suffering of bipolar disorders. The current data converge to indicate that subtle structural abnormalities, particularly at the level white matter tracts, seem to be promising endophenotype candidates for bipolar disorder.
|
L'Encephale
| 2,012
| 12
| 0
| 0
|
30,972,577
|
Correction to: Predictors of abatacept retention over 2 years in patients with rheumatoid arthritis: results from the real-world ACTION study.
|
The article listed above was initially published with incorrect copyright information. Upon publication of this Correction, the copyright of this article changed to "The Author(s)". The original article has been corrected.
|
Clinical rheumatology
| 2,019
| 5
| 0
| 0
|
33,111,973
|
Cumulative incidences of hospital-treated psychiatric disorders are increasing in five Finnish birth cohorts.
|
The aim of this study was to explore changes in the incidences of childhood and early adulthood hospital-treated psychiatric disorders in five large Finnish birth cohorts of individuals born between 1966 and 1997.
|
Acta psychiatrica Scandinavica
| 2,021
| 2
| 0
| 0
|
19,068,050
|
Relatives' perspective on the quality of geriatric care and rehabilitation--development and testing of a questionnaire.
|
We perceived a need for relatives' evaluation of geriatric care and rehabilitation during the care period as well as the first few weeks after discharge. The aim of this study was therefore to develop and test a questionnaire for use in telephone interviews with relatives of patients discharged from geriatric wards to measure their perceptions of the quality of care. The instrument development process comprised a literature review, focus group interviews, construction of items, test of content validity, a pilot study and finally the main data collection to test the construct validity and reliability. A Likert-type questionnaire was used containing 26 items with five response alternatives; totally disagree, partly disagree, doubtful, partly agree and totally agree. The main data collection comprised 238 telephone interviews. The factor analysis revealed four factors with an eigenvalue >1.0. Cronbach's alpha coefficient was 0.89, which indicates high reliability. The duration of the telephone interview was approximately 10-20 minutes. The relatives appreciated the opportunity to evaluate the care, and a majority stated that they preferred a telephone interview to answering in writing. The questionnaire is considered reliable, valid and useful for identifying areas in need of quality improvement interventions.
|
Scandinavian journal of caring sciences
| 2,008
| 12
| 0
| 0
|
33,259,628
|
Do Current Measures of Polygenic Risk for Mental Disorders Contribute to Population Variance in Mental Health?
|
The polygenic risk score (PRS) allows for quantification of the relative contributions of genes and environment in population-based studies of mental health. We analyzed the impact of transdiagnostic schizophrenia PRS and measures of familial and environmental risk on the level of and change in general mental health (Short-Form-36 mental health) in the Netherlands Mental Health Survey and Incidence Study-2 general population sample, interviewed 4 times over a period of 9 years, yielding 8901 observations in 2380 individuals. Schizophrenia PRS, family history, somatic pain, and a range of environmental risks and social circumstances were included in the regression model of level of and change in mental health. We calculated the relative contribution of each (group of) risk factor(s) to the variance in (change in) mental health. In the combined model, familial and environmental factors explained around 17% of the variance in mental health, of which around 5% was explained by age and sex, 30% by social circumstances, 16% by pain, 22% by environmental risk factors, 24% by family history, and 3% by PRS for schizophrenia (PRS-SZ). Results were similar, but attenuated, for the model of mental health change over time. Childhood trauma and gap between actual and desired social status explained most of the variance. PRS for bipolar disorder, cross-disorder, and depression explained less variance in mental health than PRS-SZ. Polygenic risk for mental suffering, derived from significance-testing in massive samples, lacks impact in analyses focusing on prediction in a general population epidemiological setting. Social-environmental circumstances, particularly childhood trauma and perceived status gap, drive most of the attributable variation in population mental health.
|
Schizophrenia bulletin
| 2,020
| 12
| 0
| 0
|
29,800,333
|
Resection of Large Petrotentorial Tumor via a Retrosigmoid Approach: 3-Dimensional Operative Video.
|
A 22-yr-old female college athlete had noted ataxia during competitive gymnastic events. Magnetic resonance imaging revealed a large tumor compatible with preoperative diagnosis of meningioma arising from the petrotentorial region with marked brainstem compression. The technical challenges associated with this removal include safe dissection of cranial nerves IV to VIII and dissection from the brainstem and cerebellum, taking care to not interfere with blood supply to these structures. The vascular tumor was removed via standard suboccipital approach, with the trajectory above the seventh/eighth nerve complex. The attachment was at the petrotentorial junction, and the fourth nerve was intimately involved with the tumor as the tumor was emanating from the tentorial edge where the fourth nerve entered. In most instances, the nerves are displaced by the tumor but in this case injury to the fourth nerve ensued with dissection at the tumor attachment. After tumor resection, the interrupted fourth nerve was repaired microsurgically. A hemangiopericytoma was identified on pathological analysis, and the patient received postoperative radiation therapy, which has been given postoperatively or at recurrence in the literature. Technical nuances of removal are discussed. Patient consent was granted for publication of this video.
|
Operative neurosurgery (Hagerstown, Md.)
| 2,019
| 2
| 0
| 0
|
26,105,741
|
Structure and function of cerebral and mesenteric resistance arteries in low-dose endotoxin-infused pregnant rats.
|
Since the cerebrovasculature likely plays a prominent role in the pathophysiology of eclampsia, we assessed the effects of low-dose endotoxin-induced experimental preeclampsia on the function and structure of rat posterior cerebral arteries (PCA) and mesenteric arteries (MA).
|
Pregnancy hypertension
| 2,013
| 1
| 0
| 0
|
26,560,947
|
[Neurophysiology in Guillain-Barré syndrome].
|
The electrodiagnostic features for the demyelinating and axonal subtypes of Guillain-Barré syndrome (GBS) were described. In the early stage of demyelinating GBS, the most prominent neurophysiologic feature is the patchy demyelination in the peripheral nerves. Conduction slowing presents in the clinical recovery stage, which indicates the conduction slowing is due to mainly remyelination. Axonal GBS shows "reversible conduction failure", as well as primary axonal degeneration. "Reversible conduction failure" is thought to be the most common cause of the underestimation of axonal GBS. The electrodiagnostic criteria for GBS subtypes should be revised based on the knowledge acquired in recent years.
|
Brain and nerve = Shinkei kenkyu no shinpo
| 2,015
| 11
| 0
| 0
|
32,052,226
|
Subunit-Specific Augmentation of AMPA Receptor Ubiquitination by Phorbol Ester.
|
Excitatory neurotransmission relies on the precise targeting of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA)-type glutamate receptors to the neuronal plasma membrane. Activity-dependent ubiquitination of AMPA receptor (AMPAR) subunits sorts internalised receptors to late endosomes for degradation, which ultimately determines the number of AMPARs on neuronal membrane. Our recent study has demonstrated a functional cross-talk between the phosphorylation and ubiquitination of the GluA1 subunit in mammalian central neurons. However, the existence of such a cross modulation for the GluA2 subunit remains unknown. Here, we have shown that bicuculline induced GluA2 ubiquitination on the same lysine residues (Lys-870 and Lys-882) in the C-terminal as those elicited by the AMPA treatment. Interestingly, bicuculline-induced ubiquitination was markedly enhanced by the phospho-mimetic GluA2 S880E mutant. Pharmacological activation of protein kinase C (PKC) by phorbol ester, which mediates the phosphorylation of GluA2 at Ser-880, augmented bicuculline-induced ubiquitination of GluA2 in cultured neurons. This effect was specific for the GluA2 subunit because phorbol ester did not alter the level of GluA1 ubiquitination. However, phorbol ester-induced enhancement of GluA2 ubiquitination did not require Ser-880 phosphorylation. This suggests that pseudo-phosphorylation of Ser-880 is sufficient but is not necessary for the augmentation of bicuculline-induced GluA2 ubiquitination. Collectively, these data provide the first demonstration of subunit-specific modulation of AMPAR ubiquitination by the PKC-dependent signalling pathway in mammalian central neurons.
|
Cellular and molecular neurobiology
| 2,020
| 10
| 0
| 0
|
32,820,459
|
Emerging Therapeutic Promise of Ketogenic Diet to Attenuate Neuropathological Alterations in Alzheimer's Disease.
|
Alzheimer's disease (AD) is a multifactorial and chronic neurodegenerative disorder that interferes with memory, thinking, and behavior. The consumption of dietary fat has been considered a vital factor for AD as this disease is related to blood-brain barrier function and cholesterol signaling. The ε4 allele of apolipoprotein E (APOE4) is a primary genetic risk factor that encodes one of many proteins accountable for the transport of cholesterol and it is deemed as the leading cholesterol transport proteins in the brain. In case of AD development, the causative factor is the high level of serum/plasma cholesterol. However, this statement is arguable and, in the meantime, the levels of brain cholesterol in individuals with AD are extremely inconstant and levels of cholesterol in the brain and serum/plasma of AD individuals do not reflect cholesterol as a risk factor. In fact, APOE4 is neither fundamental nor sufficient for the advancement of AD; it just acts as a synergistic and increases the danger of AD. Another noticeable characteristic of AD is area-specific decreases in the metabolism of brain glucose. It has been found that the brain cells cannot efficiently metabolize fats; hence, they totally rely upon glucose as a vitality substrate. Thus, suppression of glucose metabolism can possess an intense effect on brain actions. Hypometabolism is frequently found in AD and has quite recently achieved impressive consideration as a plausible target for interfering in the progression of the disease. One promising approach is to keep up the normal supply of glucose to the brain with ketone bodies from the ketogenic diet signifies a potential therapeutic agent for AD. Therefore, this review represents the role of ketogenic diets to combat AD pathogenesis by considering the influence of APOE.
|
Molecular neurobiology
| 2,020
| 12
| 0
| 0
|
33,287,888
|
Impaired lipid metabolism in astrocytes underlies degeneration of cortical projection neurons in hereditary spastic paraplegia.
|
Hereditary spastic paraplegias (HSPs) are caused by a length-dependent axonopathy of long corticospinal neurons, but how axons of these cortical projection neurons (PNs) degenerate remains elusive. We generated isogenic human pluripotent stem cell (hPSC) lines for two ATL1 missense mutations associated with SPG3A, the most common early-onset autosomal dominant HSP. In hPSC-derived cortical PNs, ATL1 mutations resulted in reduced axonal outgrowth, impaired axonal transport, and accumulated axonal swellings, recapitulating disease-specific phenotypes. Importantly, ATL1 mutations dysregulated proteolipid gene expression, reduced lipid droplet size in astrocytes, and unexpectedly disrupted cholesterol transfer from glia to neurons, leading to cholesterol deficiency in SPG3A cortical PNs. Applying cholesterol or conditioned medium from control astrocytes, a major source of cholesterol in the brain, rescued aberrant axonal transport and swellings in SPG3A cortical PNs. Furthermore, treatment with the NR1H2 agonist GW3965 corrected lipid droplet defects in SPG3A astrocytes and promoted cholesterol efflux from astrocytes, leading to restoration of cholesterol levels and rescue of axonal degeneration in SPG3A cortical PNs. These results reveal a non-cell autonomous mechanism underlying axonal degeneration of cortical PNs mediated by impaired cholesterol homeostasis in glia.
|
Acta neuropathologica communications
| 2,020
| 12
| 0
| 0
|
33,689,491
|
Functional analysis of information rates conveyed by rat whisker-related trigeminal nuclei neurons.
|
The rat whisker system connects the tactile environment with the somatosensory thalamocortical system using only two synaptic stages. Encoding properties of the first stage, the primary afferents with somas in the trigeminal ganglion (TG), has been well studied, whereas much less is known from the second stage, the brainstem trigeminal nuclei (TN). The TN are a computational hub giving rise to parallel ascending tactile pathways and receiving feedback from many brain sites. We asked the question, whether encoding properties of TG neurons are kept by two trigeminal nuclei, the principalis (Pr5) and the spinalis interpolaris (Sp5i), respectively giving rise to two "lemniscal" and two "nonlemniscal" pathways. Single units were recorded in anesthetized rats while a single whisker was deflected on a band-limited white noise trajectory. Using information theoretic methods and spike-triggered mixture models (STM), we found that both nuclei encode the stimulus locally in time, i.e., stimulus features more than 10 ms in the past do not significantly influence spike generation. They further encode stimulus kinematics in multiple, distinct response fields, indicating encoding characteristics beyond previously described directional responses. Compared with TG, Pr5 and Sp5i gave rise to lower spike and information rates, but information rate per spike was on par with TG. Importantly, both brainstem nuclei were found to largely keep encoding properties of primary afferents, i.e. local encoding and kinematic response fields. The preservation of encoding properties in channels assumed to serve different functions seems surprising. We discuss the possibility that it might reflect specific constraints of frictional whisker contact with object surfaces.
|
Journal of neurophysiology
| 2,021
| 4
| 0
| 0
|
30,799,848
|
Disruption of Frontal Lobe Neural Synchrony During Cognitive Control by Alcohol Intoxication.
|
Decision making relies on dynamic interactions of distributed, primarily frontal brain regions. Extensive evidence from functional magnetic resonance imaging (fMRI) studies indicates that the anterior cingulate (ACC) and the lateral prefrontal cortices (latPFC) are essential nodes subserving cognitive control. However, because of its limited temporal resolution, fMRI cannot accurately reflect the timing and nature of their presumed interplay. The present study combines distributed source modeling of the temporally precise magnetoencephalography (MEG) signal with structural MRI in the form of "brain movies" to: (1) estimate the cortical areas involved in cognitive control ("where"), (2) characterize their temporal sequence ("when"), and (3) quantify the oscillatory dynamics of their neural interactions in real time. Stroop interference was associated with greater event-related theta (4 - 7 Hz) power in the ACC during conflict detection followed by sustained sensitivity to cognitive demands in the ACC and latPFC during integration and response preparation. A phase-locking analysis revealed co-oscillatory interactions between these areas indicating their increased neural synchrony in theta band during conflict-inducing incongruous trials. These results confirm that theta oscillations are fundamental to long-range synchronization needed for integrating top-down influences during cognitive control. MEG reflects neural activity directly, which makes it suitable for pharmacological manipulations in contrast to fMRI that is sensitive to vasoactive confounds. In the present study, healthy social drinkers were given a moderate alcohol dose and placebo in a within-subject design. Acute intoxication attenuated theta power to Stroop conflict and dysregulated co-oscillations between the ACC and latPFC, confirming that alcohol is detrimental to neural synchrony subserving cognitive control. It interferes with goal-directed behavior that may result in deficient self-control, contributing to compulsive drinking. In sum, this method can provide insight into real-time interactions during cognitive processing and can characterize the selective sensitivity to pharmacological challenge across relevant neural networks.
|
Journal of visualized experiments : JoVE
| 2,019
| 2
| 0
| 0
|
31,728,925
|
Visual noise consisting of X-junctions has only a minimal adverse effect on object recognition.
|
In 1968, Guzman showed that the myriad of surfaces composing a highly complex and novel assemblage of volumes can readily be assigned to their appropriate volumes in terms of the constraints offered by the vertices of coterminating edges. Of particular importance was the L-vertex, produced by the cotermination of two contours, which provides strong evidence for the termination of a 2-D surface. An X-junction, formed by the crossing of two contours without a change of direction at the crossing, played no role in the segmentation of a scene. If the potency of noise elements to affect recognition performance reflects their relevancy to the segmentation of scenes, as was suggested by Guzman, gaps in an object's contours bounded by irrelevant X-junctions would be expected to have little or no adverse effect on shape-based object recognition, whereas gaps bounded by L-junctions would be expected to have a strong deleterious effect when they disrupt the smooth continuation of contours. Guzman's roles for the various vertices and junctions have never been put to systematic test with respect to human object recognition. By adding identical noise contours to line drawings of objects that produced either L-vertices or X-junctions, these shape features could be compared with respect to their disruption of object recognition. Guzman's insights that irrelevant L-vertices should be highly disruptive and irrelevant X-vertices would have only a minimal deleterious effect were confirmed.
|
Attention, perception & psychophysics
| 2,020
| 6
| 0
| 0
|
33,144,681
|
NEXMIF encephalopathy: an X-linked disorder with male and female phenotypic patterns.
|
Pathogenic variants in the X-linked gene NEXMIF (previously KIAA2022) are associated with intellectual disability (ID), autism spectrum disorder, and epilepsy. We aimed to delineate the female and male phenotypic spectrum of NEXMIF encephalopathy.
|
Genetics in medicine : official journal of the American College of Medical Genetics
| 2,021
| 2
| 0
| 0
|
32,827,705
|
Gastrointestinal symptoms associated with COVID-19: impact on the gut microbiome.
|
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused the greatest worldwide pandemic since the 1918 flu. The consequences of the coronavirus disease 2019 (COVID-19) are devastating and represent the current major public health issue across the globe. At the onset, SARS-CoV-2 primarily attacks the respiratory system as it represents the main point of entry in the host, but it also can affect multiple organs. Although most of the patients do not present symptoms or are mildly symptomatic, some people infected with SARS-CoV-2 that experience more severe multiorgan dysfunction. The severity of COVID-19 is typically combined with a set of comorbidities such as hypertension, diabetes, obesity, and/or advanced age that seriously exacerbates the consequences of the infection. Also, SARS-CoV-2 can cause gastrointestinal symptoms, such as vomiting, diarrhea, or abdominal pain during the early phases of the disease. Intestinal dysfunction induces changes in intestinal microbes, and an increase in inflammatory cytokines. Thus, diagnosing gastrointestinal symptoms that precede respiratory problems during COVID-19 may be necessary for improved early detection and treatment. Uncovering the composition of the microbiota and its metabolic products in the context of COVID-19 can help determine novel biomarkers of the disease and help identify new therapeutic targets. Elucidating changes to the microbiome as reliable biomarkers in the context of COVID-19 represent an overlooked piece of the disease puzzle and requires further investigation.
|
Translational research : the journal of laboratory and clinical medicine
| 2,020
| 12
| 0
| 0
|
18,331,156
|
Identical neural risk factors predict cognitive deficit in dyslexia and schizophrenia.
|
In previous work, the authors found that an anatomical risk index created from the combination of 7 neuroanatomical measures predicted reading and oral language skills in individuals with learning disabilities. Individuals with small auditory brain structures and reduced asymmetry had more deficits than those with large structures and exaggerated asymmetry. In the present study, the same anatomical index predicted reading and other cognitive abilities in 45 individuals with chronic schizophrenia. The anatomical risk index was significantly associated with broad cognitive ability (Pearson r = .53, p < .0001), reading comprehension (r = .58, p < .0001), and a measure of nonverbal reasoning (r = .39, p < .01), but not with age, parental socioeconomic status, symptom measures, alcohol use, or processing speed. These findings support the prediction that reduced size and asymmetry in temporal lobe auditory cortex and cerebellum may not be specific risk factors for schizophrenia but for cognitive deficits that characterize a broad spectrum of developmental disorders.
|
Neuropsychology
| 2,008
| 3
| 0
| 0
|
33,137,475
|
The macaque brain ONPRC18 template with combined gray and white matter labelmap for multimodal neuroimaging studies of Nonhuman Primates.
|
Macaques are the most common nonhuman primate (NHP) species used in neuroscience research. With the advancement of many neuroimaging techniques, new studies are beginning to apply multiple types of in vivo magnetic resonance imaging (MRI), such as structural imaging (sMRI) with T1 and T2 weighted contrasts alongside diffusion weighed (DW) imaging. In studies involving rhesus macaques, this approach can be used to better understand micro-structural changes that occur during development, in various disease states or with normative aging. However, many of the available rhesus brain atlases have been designed for only one imaging modality, making it difficult to consistently define the same brain regions across multiple imaging modalities in the same subject. To address this, we created a brain atlas from 18 adult rhesus macaques that includes co-registered templates constructed from images frequently used to characterize macroscopic brain structure (T2/SPACE and T1/MP-RAGE), and a diffusion tensor imaging (DTI) template. The DTI template was up-sampled from 1 mm isotropic resolution to resolution match to the T1 and T2-weighted images (0.5 mm isotropic), and the parameter maps were derived for FA, AD, RD and MD.The labelmap volumes delineate 57 gray matter regions of interest (ROIs; 36 cortical regions and 21 subcortical structures), as well as 74 white matter tracts. Importantly, the labelmap overlays both the structural and diffusion templates, enabling the same regions to be consistently identified across imaging modalities. A specialized condensed version of the labelmap ROIs are also included to further extend the usefulness of this tool for imaging data with lower spatial resolution, such as functional MRI (fMRI) or positron emission tomography (PET).
|
NeuroImage
| 2,021
| 1
| 0
| 0
|
30,692,689
|
A genome-wide association study of shared risk across psychiatric disorders implicates gene regulation during fetal neurodevelopment.
|
There is mounting evidence that seemingly diverse psychiatric disorders share genetic etiology, but the biological substrates mediating this overlap are not well characterized. Here we leverage the unique Integrative Psychiatric Research Consortium (iPSYCH) study, a nationally representative cohort ascertained through clinical psychiatric diagnoses indicated in Danish national health registers. We confirm previous reports of individual and cross-disorder single-nucleotide polymorphism heritability for major psychiatric disorders and perform a cross-disorder genome-wide association study. We identify four novel genome-wide significant loci encompassing variants predicted to regulate genes expressed in radial glia and interneurons in the developing neocortex during mid-gestation. This epoch is supported by partitioning cross-disorder single-nucleotide polymorphism heritability, which is enriched at regulatory chromatin active during fetal neurodevelopment. These findings suggest that dysregulation of genes that direct neurodevelopment by common genetic variants may result in general liability for many later psychiatric outcomes.
|
Nature neuroscience
| 2,019
| 3
| 0
| 0
|
33,433,687
|
Morphology, localization, and postnatal development of dural macrophages.
|
The dura mater contains abundant macrophages whose functions remain largely elusive. Recent studies have demonstrated the origin, as well as the gene expression pattern, of dural macrophages (dMΦs). However, their histological features have not been explored yet. In this study, we performed immunohistochemistry and electron microscopy to elucidate their precise morphology, localization, and postnatal development in mice. We found that the morphology, as well as the localization, of dMΦs changed during postnatal development. In neonatal mice, dMΦ exhibited an amoeboid morphology. During postnatal development, their cell bodies elongated longitudinally and became aligned along dural blood vessels. In adulthood, nearly half of the dMΦs aligned along blood vessel networks. However, most of these cells were not directly attached to vessels; pericytes and fibroblasts interposed between dMΦs and vessels. This morphological information may provide further indications for the functional significance of dMΦs.
|
Cell and tissue research
| 2,021
| 4
| 0
| 0
|
32,707,433
|
Basic Fibroblast Growth Factor 2-Induced Proteome Changes Endorse Lewy Body Pathology in Hippocampal Neurons.
|
Hippocampal Lewy body pathology (LBP) is associated with changes in neurotrophic factor signaling and neuronal energy metabolism. LBP progression is attributed to the aggregation of α-synuclein (α-Syn) and its cell-to-cell transmission via extracellular vehicles (EVs). We recently discovered an enhanced EV release in basic fibroblast growth factor (bFGF)-treated hippocampal neurons. Here, we examined the EV and cell lysate proteome changes in bFGF-treated hippocampal neurons. We identified n = 2,310 differentially expressed proteins (DEPs) induced by bFGF. We applied weighted protein co-expression network analysis (WPCNA) to generate protein modules from DEPs and mapped them to published LBP datasets. This approach revealed n = 532 LBP-linked DEPs comprising key α-Syn-interacting proteins, LBP-associated RNA-binding proteins (RBPs), and neuronal ion channels and receptors that can impact LBP onset and progression. In summary, our deep proteomic analysis affirms the potential influence of bFGF signaling on LBP-related proteome changes and associated molecular interactions.
|
iScience
| 2,020
| 8
| 0
| 0
|
32,909,070
|
Ultrasound-guided percutaneous brachiocephalic vein cannulation for ventriculoatrial shunt placement in a child.
|
As far as the ventriculoatrial shunt placement in children is concerned, the percutaneous approach to the internal jugular vein under ultrasonographic control has been hitherto strongly recommended. Unfortunately, children still represent a challenge, having them peculiar characteristics for which the internal jugular vein cannulation shows some disadvantages.
|
Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery
| 2,020
| 12
| 0
| 0
|
34,909,057
|
TAT-peptide conjugated repurposing drug against SARS-CoV-2 main protease (3CLpro): Potential therapeutic intervention to combat COVID-19.
|
The Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that originated in Chinese city of Wuhan has caused around 906,092 deaths and 28,040,853 confirmed cases worldwide (https://covid19.who.int/, 11 September 2020). In a life-threatening situation, where there is no specific and licensed anti-COVID-19 vaccine or medicine available; the repurposed drug might act as a silver bullet. Currently, more than 211 vaccines, 80 antibodies, 31 antiviral drugs, 35 cell-based, 6 RNA-based and 131 other drugs are in clinical trials. It is therefore utter need of the hour to develop an effective drug that can be used for the treatment of COVID-19 before a vaccine can be developed. One of the best-characterized and attractive drug targets among coronaviruses is the main protease (3CL
|
Arabian journal of chemistry
| 2,020
| 11
| 0
| 0
|
32,862,045
|
Astrocytes as cellular mediators of cue reactivity in addiction.
|
Relapse to addictive drug use remains a major medical problem worldwide. In rodents, glutamate release in the nucleus accumbens core triggers reinstated drug seeking in response to stress, and drug-associated cues and contexts. Glutamatergic dysregulation in addiction results in part from long-lasting adaptations in accumbens astroglia, including downregulation of the glutamate transporter GLT-1 and retraction from synapses after withdrawal from psychostimulants and opioids. While their capacity to clear glutamate is disrupted by drug use and withdrawal, accumbens astrocytes undergo rapid, transient plasticity in response to drug-associated cues that reinstate seeking. Cued reinstatement of heroin seeking, for example, restores synaptic proximity of astrocyte processes through ezrin phosphorylation, and enhances GLT-1 surface expression. These adaptations limit drug seeking behavior and largely occur on non-overlapping populations of astroglia. Here we review the growing literature supporting a critical role for accumbens astrocytes in modulating glutamate transmission during drug seeking in rodent models of relapse.
|
Current opinion in pharmacology
| 2,021
| 2
| 0
| 0
|
33,038,380
|
The protective effects of prolactin on brain injury.
|
Brain injuries based on their causes are divided into two categories, TBI and NTBI. TBI is caused by damages such as head injury, but non-physical injury causes NTBI. Prolactin is one of the blood factors that increase during brain injury. It has been assumed to play a regenerative role in post-injury recovery.
|
Life sciences
| 2,020
| 12
| 0
| 0
|
29,656,267
|
A naturalistic examination of the perceived effects of cannabis on negative affect.
|
Cannabis is commonly used to alleviate symptoms of negative affect. However, a paucity of research has examined the acute effects of cannabis on negative affect in everyday life. The current study provides a naturalistic account of perceived changes in symptoms of depression, anxiety, and stress as a function of dose and concentration of Δ
|
Journal of affective disorders
| 2,018
| 8
| 0
| 0
|
22,414,402
|
[For an integrative approach of Alzheimer's disease. Relevance and limits].
|
Alzheimer's disease could be studied according to neurological, cognitive, and psychopathological aspects. We propose an integrative approach fitting together the theoretical advances of the various dimensions to develop a better understanding of the disorders, then a better care for the patients. The integrative approach deviates deliberately from any attempt to formulate etiological hypotheses, and considers the disorder in its functional complexity, simultaneously taking into account the somatic and psychological factors involved. According to this monistic view, the traditional cleavage between the soma and psyche, usually found in Alzheimer's disease, should be rejected and substituted for the principle of compatibility intending to identify the points of convergence of various conceptual approaches in order to emphasize their potential overlap and areas of clinical complementarity rather than their epistemological antagonisms. The neuro-psychic link is therefore central to the conceptual development proposed here, and more specifically for the memory disorders, the concept of memory trace belonging both to psychoanalytic and neuropsychological theories.
|
Geriatrie et psychologie neuropsychiatrie du vieillissement
| 2,012
| 3
| 0
| 0
|
33,631,507
|
The basal turning point of optic radiation (bTPOR): The location of optic radiation in the cerebral basal surface.
|
Optic radiation protection is crucial in the basal temporal approach to the mesial temporal lobe. Clear description of the optic radiation in the basal brain surface is lacking. Our aim is to describe the anatomy of optic radiation in the basal cerebral surface and define safety zone of basal temporal approach avoiding of optic radiation injury.
|
Clinical neurology and neurosurgery
| 2,021
| 4
| 0
| 0
|
33,017,599
|
Suicidal behaviors and ideation during emerging viral disease outbreaks before the COVID-19 pandemic: A systematic rapid review.
|
The current COVID-19 pandemic is the most severe pandemic of the 21st century, on track to having a rising death toll. Beyond causing respiratory distress, COVID-19 may also cause mortality by way of suicide. The pathways by which emerging viral disease outbreaks (EVDOs) and suicide are related are complex and not entirely understood. We aimed to systematically review the evidence on the association between EVDOs and suicidal behaviors and/or ideation. An electronic search was conducted using five databases: Medline, Embase, Web of Science, PsycINFO and Scopus in April 2020. A rapid systematic review was carried out, which involved separately and independently extracting quantitative data of selected articles. The electronic search yielded 2480 articles, of which 9 met the inclusion criteria. Most of the data were collected in Hong Kong (n = 3) and the USA (n = 3). Four studies reported a slight but significant increase in deaths by suicide during EVDOs. The increase in deaths by suicide was mainly reported during the peak epidemic and in older adults. Psychosocial factors such as the fear of being infected by the virus or social isolation related to quarantine measures were the most prominent factors associated with deaths by suicide during EVDOs. Overall, we found scarce and weak evidence for an increased risk of deaths by suicide during EVDOs. Our results inform the need to orient public health policies toward suicide prevention strategies targeting the psychosocial effects of EVDOs. High-quality research on suicide risk and prevention are warranted during the current pandemic.
|
Preventive medicine
| 2,020
| 12
| 0
| 0
|
32,508,193
|
Risk factors for mortality in patients with Coronavirus disease 2019 (COVID-19) infection: a systematic review and meta-analysis of observational studies.
|
Coronavirus disease 2019 (COVID-19) is an emerging disease that was first reported in Wuhan city, the capital of Hubei province in China, and has subsequently spread worldwide. Risk factors for mortality have not been well summarized. Current meta-analysis of retrospective cohort studies was done to summarize available findings on the association between age, gender, comorbidities and risk of death from COVID-19 infection.
|
The aging male : the official journal of the International Society for the Study of the Aging Male
| 2,020
| 12
| 0
| 0
|
27,287,450
|
Social behavioral testing and brain magnetic resonance imaging in chicks exposed to mobile phone radiation during development.
|
The potential adverse effect of mobile phone radiation is currently an area of great concern in the field of public health. In the present study, we aimed to investigate the effect of mobile phone radiation (900 MHz radiofrequency) during hatching on postnatal social behaviors in chicks, as well as the effect on brain size and structural maturity estimated using 3.0 T magnetic resonance imaging. At day 4 of incubation, 76 normally developing chick embryos were divided into the control group (n = 39) and the radiation group (n = 37). Eggs in the radiation group were exposed to mobile phone radiation for 10 h each day from day 4 to 19 of incubation. Behavioral tests were performed 4 days after hatching. T2-weighted MR imaging and diffusion tensor imaging (DTI) were subsequently performed. The size of different brain subdivisions (telencephalon, optic lobe, brain stem, and cerebellum) and corresponding DTI parameters were measured. The Chi-square test and the student's t test were used for statistical analysis. P < 0.05 was considered statistically significant.
|
BMC neuroscience
| 2,016
| 6
| 0
| 0
|
32,615,147
|
Neural oscillations and brain stimulation in Alzheimer's disease.
|
Aging is associated with alterations in cognitive processing and brain neurophysiology. Whereas the primary symptom of amnestic mild cognitive impairment (aMCI) is memory problems greater than normal for age and education, patients with Alzheimer's disease (AD) show impairments in other cognitive domains in addition to memory dysfunction. Resting-state electroencephalography (rsEEG) studies in physiological aging indicate a global increase in low-frequency oscillations' power and the reduction and slowing of alpha activity. The enhancement of slow and the reduction of fast oscillations, and the disruption of brain functional connectivity, however, are characterized as major rsEEG changes in AD. Recent rodent studies also support human evidence of age- and AD-related changes in resting-state brain oscillations, and the neuroprotective effect of brain stimulation techniques through gamma-band stimulations. Cumulatively, current evidence moves toward optimizing rsEEG features as reliable predictors of people with aMCI at risk for conversion to AD and mapping neural alterations subsequent to brain stimulation therapies. The present paper reviews the latest evidence of changes in rsEEG oscillations in physiological aging, aMCI, and AD, as well as findings of various brain stimulation therapies from both human and non-human studies.
|
Progress in neurobiology
| 2,020
| 11
| 0
| 0
|
34,589,867
|
Perinatal IL-1β-induced inflammation suppresses Tbr2
|
Meta-analyses have revealed associations between the incidence of maternal infections during pregnancy, premature birth, smaller brain volumes, and subsequent cognitive, motor and behavioral deficits as these children mature. Inflammation during pregnancy in rodents produces cognitive and behavioral deficits in the offspring that are similar to those reported in human studies. These deficits are accompanied by decreased neurogenesis and proliferation in the subgranular zone (SGZ) of the dentate gyrus (DG) of the hippocampus. As systemically administering interleukin-1 β (IL-1β) to neonatal mice recapitulates many of the brain abnormalities seen in premature babies including developmental delays, the goal of this study was to determine whether IL-1-mediated neuroinflammation would affect hippocampal growth during development to produce cognitive and behavioral abnormalities. For these studies, 10 ng/g IL-1β was administered twice daily to Swiss Webster mice during the first 5 days of life, which increased hippocampal levels of IL-1α and acutely reduced the proliferation of Tbr2
|
Brain, behavior, & immunity - health
| 2,020
| 8
| 0
| 0
|
33,097,540
|
Versatile phenotype-activated cell sorting.
|
Unraveling the genetic and epigenetic determinants of phenotypes is critical for understanding and re-engineering biology and would benefit from improved methods to separate cells based on phenotypes. Here, we report SPOTlight, a versatile high-throughput technique to isolate individual yeast or human cells with unique spatiotemporal profiles from heterogeneous populations. SPOTlight relies on imaging visual phenotypes by microscopy, precise optical tagging of single target cells, and retrieval of tagged cells by fluorescence-activated cell sorting. To illustrate SPOTlight's ability to screen cells based on temporal properties, we chose to develop a photostable yellow fluorescent protein for extended imaging experiments. We screened 3 million cells expressing mutagenesis libraries and identified a bright new variant, mGold, that is the most photostable yellow fluorescent protein reported to date. We anticipate that the versatility of SPOTlight will facilitate its deployment to decipher the rules of life, understand diseases, and engineer new molecules and cells.
|
Science advances
| 2,020
| 10
| 0
| 0
|
20,090,531
|
Stratification of American hearing aid users by age and audiometric characteristics: a method for representative sampling.
|
Stratified sampling plans can increase the accuracy and facilitate the interpretation of a dataset characterizing a large population. However, such sampling plans have found minimal use in hearing aid (HA) research, in part because of a paucity of quantitative data on the characteristics of HA users. The goal of this study was to devise a quantitatively derived stratified sampling plan for HA research, so that such studies will be more representative and generalizable, and the results obtained using this method are more easily reinterpreted as the population changes.
|
Ear and hearing
| 2,010
| 6
| 0
| 0
|
31,975,491
|
Differential calcium channel-mediated dopaminergic modulation in the subthalamonigral synapse.
|
Dopamine (DA) modulates basal ganglia (BG) activity for initiation and execution of goal-directed movements and habits. While most studies are aimed to striatal function, the cellular and molecular mechanisms underlying dopaminergic regulation in other nuclei of the BG are not well understood. Therefore, we set to analyze the dopaminergic modulation occurring in subthalamo-nigral synapse, in both pars compacta (SNc) and pars reticulata (SNr) neurons, because these synapses are important for the integration of information previously processed in striatum and globus pallidus. In this study, electrophysiological and pharmacological evidence of dopaminergic modulation on glutamate release through calcium channels is presented. Using paired pulse ratio (PPR) measurements and selective blockers of these ionic channels, together with agonists and antagonists of DA D
|
Synapse (New York, N.Y.)
| 2,020
| 7
| 0
| 0
|
33,531,622
|
Increased functional coupling of the mu opioid receptor in the anterior insula of depressed individuals.
|
The mu opioid receptor (MOR) is a G protein-coupled receptor that plays an essential role in reward and hedonic processes, and that has been implicated in disorders such as depression and addiction. Over the last decade, several brain imaging studies in depressed patients have consistently found that dysregulation of MOR function occurs in particular in the anterior insular cortex, an important brain site for the perception of internal states and emotional regulation. To investigate molecular mechanisms that may underlie these effects, here we assessed genetic polymorphisms, expression, and functional G-protein coupling of MOR in a large post-mortem cohort (N = 95) composed of depressed individuals who died by suicide, and healthy controls. Results indicated that depression, but not comorbid substance use disorder or acute opiate consumption, was associated with increased MOR activity. This effect was partly explained by a specific increase in expression of the inhibitory alpha G-protein subunit GNAI2. Consistent with previous neuroimaging studies, our findings support the notion that enhanced endogenous opioidergic tone in the anterior insula may buffer negative affective states in depressed individuals, a mechanism that could potentially contribute to the antidepressant efficacy of emerging opioid-based medications.
|
Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology
| 2,021
| 4
| 0
| 0
|
32,682,097
|
Developing a neurally informed ontology of creativity measurement.
|
A central challenge for creativity research-as for all areas of experimental psychology and cognitive neuroscience-is to establish a mapping between constructs and measures (i.e., identifying a set of tasks that best captures a set of creative abilities). A related challenge is to achieve greater consistency in the measures used by different researchers; inconsistent measurement hinders progress toward shared understanding of cognitive and neural components of creativity. New resources for aggregating neuroimaging data, and the emergence of methods for identifying structure in multivariate data, present the potential for new approaches to address these challenges. Identifying meta-analytic structure (i.e., similarity) in neural activity associated with creativity tasks might help identify subsets of these tasks that best reflect the similarity structure of creativity-relevant constructs. Here, we demonstrated initial proof-of-concept for such an approach. To build a model of similarity between creativity-relevant constructs, we first surveyed creativity researchers. Next, we used NeuroSynth meta-analytic software to generate maps of neural activity robustly associated with tasks intended to measure the same set of creativity-relevant constructs. A representational similarity analysis-based approach identified particular constructs-and particular tasks intended to measure those constructs-that positively or negatively impacted the model fit. This approach points the way to identifying optimal sets of tasks to capture elements of creativity (i.e., dimensions of similarity space among creativity constructs), and has long-term potential to meaningfully advance the ontological development of creativity research with the rapid growth of creativity neuroscience. Because it relies on neuroimaging meta-analysis, this approach has more immediate potential to inform longer-established fields for which more extensive sets of neuroimaging data are already available.
|
NeuroImage
| 2,020
| 11
| 0
| 0
|
25,497,885
|
No man is an island. A personal tribute to Bob Blanchard and ethoexperimental approaches to the study of behaviour.
|
I first met Bob Blanchard at an international conference in Paris some 40 years ago. We collaborated intensively during the late 1980s/early 1990s on the ethopharmacology of antipredator defence in wild and laboratory rats, and remained good friends until his untimely passing in November 2013. Bob will undoubtedly be remembered as one of the most influential behavioural neuroscientists of the 20th century and, with Caroline, the most eloquent advocate of ethoexperimental approaches to the study of behaviour. In this brief trip down memory lane, I describe when and where Bob and I first met and how, over a lengthy period, he directly and indirectly helped shape my own research career. His profound influence in this regard is illustrated by reference to not only our collaborative research on antipredator behaviour but also my other work on the ethopharmacology of agonistic behaviour, social conflict analgesia, anxiety, and appetite. The element common to all of this work has been ethoexperimental analysis and, for teaching me the true value of this approach, I shall always remain indebted to the big man. Literally and figuratively, Bob was most certainly larger than life.
|
Physiology & behavior
| 2,015
| 7
| 0
| 0
|
32,997,569
|
Online control of reach accuracy in mice.
|
Reaching movements, as a basic yet complex motor behavior, are a foundational model system in neuroscience. In particular, there has been a significant recent expansion of investigation into the neural circuit mechanisms of reach behavior in mice. Nevertheless, quantification of mouse reach kinematics remains lacking, limiting comparison to the primate literature. In this study, we quantitatively demonstrate the homology of mouse reach kinematics to primate reach and also discover novel late-phase correlational structure that implies online control. Overall, our results highlight the decelerative phase of reach as important in driving successful outcome. Specifically, we develop and implement a novel statistical machine-learning algorithm to identify kinematic features associated with successful reaches and find that late-phase kinematics are most predictive of outcome, signifying online reach control as opposed to preplanning. Moreover, we identify and characterize late-phase kinematic adjustments that are yoked to midflight position and velocity of the limb, allowing for dynamic correction of initial variability, with head-fixed reaches being less dependent on position in comparison to freely behaving reaches. Furthermore, consecutive reaches exhibit positional error correction but not hot-handedness, implying opponent regulation of motor variability. Overall, our results establish foundational mouse reach kinematics in the context of neuroscientific investigation, characterizing mouse reach production as an active process that relies on dynamic online control mechanisms.
|
Journal of neurophysiology
| 2,020
| 12
| 0
| 0
|
32,289,319
|
Glutamatergic fast-spiking parvalbumin neurons in the lateral hypothalamus: Electrophysiological properties to behavior.
|
Throughout the central nervous system, neurons expressing the calcium-binding protein parvalbumin have been typically classified as GABAergic with fast-spiking characteristics. However, new methods that allow systematic characterization of the cytoarchitectural organization, connectivity, activity patterns, neurotransmitter nature, and function of genetically-distinct cell types have revealed populations of parvalbumin-positive neurons that are glutamatergic. Remarkably, such findings challenge longstanding concepts that fast-spiking neurons are exclusively GABAergic, suggesting conservation of the fast-spiking phenotype across at least two neurotransmitter systems. This review focuses on the recent advancements that have begun to reveal the functional roles of lateral hypothalamic parvalbumin-positive neurons in regulating behaviors essential for survival.
|
Physiology & behavior
| 2,020
| 7
| 0
| 0
|
29,733,988
|
Cardiac-Related Spinal Cord Tissue Motion at the Foramen Magnum is Increased in Patients with Type I Chiari Malformation and Decreases Postdecompression Surgery.
|
Type 1 Chiari malformation (CM-I) is a craniospinal disorder historically defined by cerebellar tonsillar position greater than 3-5 mm below the foramen magnum (FM). This definition has come under question because quantitative measurements of cerebellar herniation do not always correspond with symptom severity. Researchers have proposed several additional radiographic diagnostic criteria based on dynamic motion of fluids and/or tissues. The present study objective was to determine if cardiac-related craniocaudal spinal cord tissue displacement is an accurate indicator of the presence of CM-I and if tissue displacement is altered with decompression.
|
World neurosurgery
| 2,018
| 8
| 0
| 0
|
20,388,651
|
An interview with Steve Wilson. Interview by Kathryn Senior.
|
Stephen Wilson is Professor of Developmental Genetics at University College, London, UK. He was recently awarded the Remedios Caro Almela Prize for Research in Developmental Neurobiology. We interviewed Steve to find out about how he started on the road to developmental biology research, how he got interested in the brain, his achievements and future challenges.
|
Development (Cambridge, England)
| 2,010
| 5
| 0
| 0
|
25,221,847
|
Influence of vision and posture on grip-lift task parameters in healthy adults.
|
The grip-lift task enables a quantitative assessment of grasping ability. Patients are regularly assessed in a supine position, which offers a different view of the grasped object from that in the sitting position. To our knowledge, no data are currently available on the influence of posture and vision on grip-lift task parameters. We therefore aimed to determine the effects of posture and vision on these parameters. Twenty-six healthy right-handed adults performed grip-lift tasks with a manipulandum that measured different temporal and dynamic parameters in four conditions: sitting eyes open, sitting blindfolded, lying down eyes open and lying down blindfolded. A repeated-measures analysis of variance with two factors (vision and position) showed that the absence of vision affected all the parameters measured. The lying down position increased the time between the first contact with the object and the modification of the vertical force as well as the delay between the first increase of the horizontal force and the increase of the vertical force. In addition, there was a lower adaption of the horizontal force, required to squeeze the object, to the vertical force. Finally, the interaction of position and vision was associated with significant differences in the delay between the contact of each digit with the object, the maximum horizontal force and the ratio between the horizontal and vertical force during a static holding period. Both position and vision appear to affect the grip-lift task. Consequently, sequential assessments should be performed in the same condition to obtain reliable data.
|
International journal of rehabilitation research. Internationale Zeitschrift fur Rehabilitationsforschung. Revue internationale de recherches de readaptation
| 2,014
| 12
| 0
| 0
|
32,828,971
|
AMPed-up adolescents: The role of age in the abuse of amphetamines and its consequences on cognition and prefrontal cortex development.
|
Adolescent use of amphetamine and its closely related, methylated version methamphetamine, is alarmingly high in those who use drugs for nonmedical purposes. This raises serious concerns about the potential for this drug use to have a long-lasting, detrimental impact on the normal development of the brain and behavior that is ongoing during adolescence. In this review, we explore recent findings from both human and laboratory animal studies that investigate the consequences of amphetamine and methamphetamine exposure during this stage of life. We highlight studies that assess sex differences in adolescence, as well as those that are designed specifically to address the potential unique effects of adolescent exposure by including groups at other life stages (typically young adulthood). We consider epidemiological studies on age and sex as vulnerability factors for developing problems with the use of amphetamines, as well as human and animal laboratory studies that tap into age differences in use, its short-term effects on behavior, and the long-lasting consequences of this exposure on cognition. We also focus on studies of drug effects in the prefrontal cortex, which is known to be critically important for cognition and is among the later maturing brain regions. Finally, we discuss important issues that should be addressed in future studies so that the field can further our understanding of the mechanisms underlying adolescent use of amphetamines and its outcomes on the developing brain and behavior.
|
Pharmacology, biochemistry, and behavior
| 2,020
| 11
| 0
| 0
|
33,203,002
|
Complex Interaction between Resident Microbiota and Misfolded Proteins: Role in Neuroinflammation and Neurodegeneration.
|
Neurodegenerative diseases such as Alzheimer's disease (AD), Parkinson's disease (PD) and Creutzfeldt-Jakob disease (CJD) are brain conditions affecting millions of people worldwide. These diseases are associated with the presence of amyloid-β (Aβ), alpha synuclein (α-Syn) and prion protein (PrP) depositions in the brain, respectively, which lead to synaptic disconnection and subsequent progressive neuronal death. Although considerable progress has been made in elucidating the pathogenesis of these diseases, the specific mechanisms of their origins remain largely unknown. A body of research suggests a potential association between host microbiota, neuroinflammation and dementia, either directly due to bacterial brain invasion because of barrier leakage and production of toxins and inflammation, or indirectly by modulating the immune response. In the present review, we focus on the emerging topics of neuroinflammation and the association between components of the human microbiota and the deposition of Aβ, α-Syn and PrP in the brain. Special focus is given to gut and oral bacteria and biofilms and to the potential mechanisms associating microbiome dysbiosis and toxin production with neurodegeneration. The roles of neuroinflammation, protein misfolding and cellular mediators in membrane damage and increased permeability are also discussed.
|
Cells
| 2,020
| 11
| 0
| 0
|
33,440,199
|
Distinct feedback actions of behavioural arousal to the master circadian clock in nocturnal and diurnal mammals.
|
The master clock in the suprachiasmatic nucleus (SCN) of the hypothalamus provides a temporal pattern of sleep and wake that - like many other behavioural and physiological rhythms - is oppositely phased in nocturnal and diurnal animals. The SCN primarily uses environmental light, perceived through the retina, to synchronize its endogenous circadian rhythms with the exact 24 h light/dark cycle of the outside world. The light responsiveness of the SCN is maximal during the night in both nocturnal and diurnal species. Behavioural arousal during the resting period not only perturbs sleep homeostasis, but also acts as a potent non-photic synchronizing cue. The feedback action of arousal on the SCN is mediated by processes involving several brain nuclei and neurotransmitters, which ultimately change the molecular functions of SCN pacemaker cells. Arousing stimuli during the sleeping period differentially affect the circadian system of nocturnal and diurnal species, as evidenced by the different circadian windows of sensitivity to behavioural arousal. In addition, arousing stimuli reduce and increase light resetting in nocturnal and diurnal species, respectively. It is important to address further question of circadian impairments associated with shift work and trans-meridian travel not only in the standard nocturnal laboratory animals but also in diurnal animal models.
|
Neuroscience and biobehavioral reviews
| 2,021
| 4
| 0
| 0
|
23,384,820
|
A summary of the proceedings of the Eleventh International Symposium on the Neurobiology and Neuroendocrinology of Aging, Bregenz, Austria, July 29-August 3, 2012.
|
A summary of the Eleventh International Symposium on the Neurobiology and Neuroendocrinology of Aging that was held in July 29-August 3 in Bregenz, Austria, is presented. Sixteen of the speakers who presented at the conference submitted review papers covering the topic of their presentation as well as an overview of their respective fields and are included in this special issue. The abstracts from each poster presentation are also included at the end of the special issue.
|
Experimental gerontology
| 2,013
| 7
| 0
| 0
|
25,011,063
|
C6 deficiency does not alter intrinsic regeneration speed after peripheral nerve crush injury.
|
Peripheral nerve injury leads to Wallerian degeneration, followed by regeneration, in which functionality and morphology of the nerve are restored. We previously described that deficiency for complement component C6, which prevents formation of the membrane attack complex, slows down degeneration and results in an earlier recovery of sensory function after sciatic nerve injury compared to WT animals. In this study, we determine whether C6(-/-) rats have an intrinsic trait that affects sciatic nerve regeneration after injury. To study the contribution of complement activation on degeneration and regeneration with only minimal effect of complement activation, a crush injury model with only modest complement deposition was used. We compared the morphological and functional aspects of crushed nerves during degeneration and regeneration in C6(-/-) and WT animals. Morphological changes of myelin and axons showed similar degeneration and regeneration patterns in WT and C6(-/-) injured nerves. Functional degeneration and regeneration, recorded by ex vivo electrophysiology and in vivo foot flick test, showed that the timeline of the restoration of nerve conduction and sensory recovery also followed similar patterns in WT and C6(-/-) animals. Our findings suggest that C6 deficiency by itself does not alter the regrowth capacity of the peripheral nerve after crush injury.
|
Neuroscience research
| 2,014
| 10
| 0
| 0
|
32,722,556
|
Intravitreal Dexamethasone Implant as a Sustained Release Drug Delivery Device for the Treatment of Ocular Diseases: A Comprehensive Review of the Literature.
|
Drug delivery into the vitreous chamber remains a great challenge in the pharmaceutical industry due to the complex anatomy and physiology of the eye. Intravitreal injection is the mainstream route of drug administration to the posterior segment of the eye. The purpose of this review is to assess the current literature about the widening use of the intravitreal 0.7 mg dexamethasone (Dex) implant, and to provide a comprehensive collection of all the ocular disorders that benefit from Dex administration. Although anti-vascular endothelial growth-factors (VEGFs) have been largely indicated as a first-choice level, the Dex implant represents an important treatment option, especially in selected cases, such as vitrectomized eyes or patients in whom anti-VEGF failed or are contraindicated. In this article, the safety profile as well as the list of the possible complications related to intravitreal Dex injection are also discussed.
|
Pharmaceutics
| 2,020
| 7
| 0
| 0
|
32,988,456
|
Unexplained repeated pregnancy loss is associated with altered perceptual and brain responses to men's body-odor.
|
Mammalian olfaction and reproduction are tightly linked, a link less explored in humans. Here, we asked whether human unexplained repeated pregnancy loss (uRPL) is associated with altered olfaction, and particularly altered olfactory responses to body-odor. We found that whereas most women with uRPL could identify the body-odor of their spouse, most control women could not. Moreover, women with uRPL rated the perceptual attributes of men's body-odor differently from controls. These pronounced differences were accompanied by an only modest albeit significant advantage in ordinary, non-body-odor-related olfaction in uRPL. Next, using structural and functional brain imaging, we found that in comparison to controls, most women with uRPL had smaller olfactory bulbs, yet increased hypothalamic response in association with men's body-odor. These findings combine to suggest altered olfactory perceptual and brain responses in women experiencing uRPL, particularly in relation to men's body-odor. Whether this link has any causal aspects to it remains to be explored.
|
eLife
| 2,020
| 9
| 0
| 0
|
33,007,503
|
Insight into the mechanism of cytotoxicity of membrane-permeant psoralenic Kv1.3 channel inhibitors by chemical dissection of a novel member of the family.
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The potassium channel Kv1.3, involved in several important pathologies, is the target of a family of psoralen-based drugs whose mechanism of action is not fully understood. Here we provide evidence for a physical interaction of the mitochondria-located Kv1.3 (mtKv1.3) and Complex I of the respiratory chain and show that this proximity underlies the death-inducing ability of psoralenic Kv1.3 inhibitors. The effects of PAP-1-MHEG (PAP-1, a Kv1.3 inhibitor, with six monomeric ethylene glycol units attached to the phenyl ring of PAP-1), a more soluble novel derivative of PAP-1 and of its various portions on mitochondrial physiology indicate that the psoralenic moiety of PAP-1 bound to mtKv1.3 facilitates the diversion of electrons from Complex I to molecular oxygen. The resulting massive production of toxic Reactive Oxygen Species leads to death of cancer cells expressing Kv1.3. In vivo, PAP-1-MHEG significantly decreased melanoma volume. In summary, PAP-1-MHEG offers insights into the mechanisms of cytotoxicity of this family of compounds and may represent a valuable clinical tool.
|
Redox biology
| 2,020
| 10
| 0
| 0
|
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