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https://www.readbyqxmd.com/read/28109096/-vildagliptin-suppresses-temporal-lobe-epilepsy-by-up-regulating-glucagon-like-peptide-1
#1
Yue-Tao Wen, Kun-Lun Wu, Quan-Hong Shi
OBJECTIVE: To investigate the effect of vildagliptin on pentamethazol (PTZ)-induced epilepsy in rats and explore the molecular mechanism. METHODS: Samples of temporal cortex from 23 patients with temporal lobe epilepsy were collected as epilepsy group and samples of temporal cortex from 14 patients with brain trauma were used as control group. Ninety male SD rats were randomly divided into control group (group A), PTZ-induced epilepsy group (group B), saline 2 mL/kg group (group C), vildagliptin 2...
January 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28108948/erratum-to-autophagy-induction-by-sirt6-is-involved-in-oxidative-stress-induced-neuronal-damage
#2
Jiaxiang Shao, Xiao Yang, Tengyuan Liu, Tingting Zhang, Qian Reuben Xie, Weiliang Xia
No abstract text is available yet for this article.
January 20, 2017: Protein & Cell
https://www.readbyqxmd.com/read/28108850/baicalein-promotes-neuronal-and-behavioral-recovery-after-intracerebral-hemorrhage-via-suppressing-apoptosis-oxidative-stress-and-neuroinflammation
#3
Ning Wei, Yinghai Wei, Binru Li, Linlin Pang
Intracerebral hemorrhage (ICH) is an important public health problem in neurology, which is not only associated with high mortality but also leading to disability. Yet no satisfactory treatment has been developed. The secondary injury that resulted from a number of self-destructive processes such as neuroinflammation, apoptosis and oxidative stress, is the key factor contributing to ICH-induced brain damage. Baicalein has been proved to improve neuronal functional recovery in rat model of subarachnoid hemorrhage and ischemic brain damage...
January 21, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28108849/toll-like-receptor-4-affects-the-cerebral-biochemical-changes-induced-by-mptp-treatment
#4
Carmela Conte, Luca Roscini, Roccaldo Sardella, Giuseppina Mariucci, Stefania Scorzoni, Tommaso Beccari, Laura Corte
The etiology and pathogenesis of Parkinson's disease (PD) are still unclear. However, multiple lines of evidence suggest a critical role of the toll like receptor 4 (TLR4) in inflammatory response and neuronal death. Neuroinflammation may be associated with the misfolding and aggregation of proteins accompanied by a change in their secondary structure. Recent findings also suggest that biochemical perturbations in cerebral lipid content could contribute to the pathogenesis of central nervous system (CNS) disorders, including PD...
January 21, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28108647/effects-of-early-life-exposure-to-thip-on-brainstem-neuronal-excitability-in-the-mecp2-null-mouse-model-of-rett-syndrome-before-and-after-drug-withdrawal
#5
Weiwei Zhong, Christopher M Johnson, Ningren Cui, Max F Oginsky, Yang Wu, Chun Jiang
Rett syndrome (RTT) is mostly caused by mutations of the X-linked MECP2 gene. Although the causal neuronal mechanisms are still unclear, accumulating experimental evidence obtained from Mecp2(-/Y) mice suggests that imbalanced excitation/inhibition in central neurons plays a major role. Several approaches may help to rebalance the excitation/inhibition, including agonists of GABAA receptors (GABAAR). Indeed, our previous studies have shown that early-life exposure of Mecp2-null mice to the extrasynaptic GABAAR agonist THIP alleviates several RTT-like symptoms including breathing disorders, motor dysfunction, social behaviors, and lifespan...
January 2017: Physiological Reports
https://www.readbyqxmd.com/read/28108570/retinal-sensitivity-changes-associated-with-diabetic-neuropathy-in-the-absence-of-diabetic-retinopathy
#6
Srividya Neriyanuri, Shahina Pardhan, Laxmi Gella, Sakshyar Saumya Pal, Suganeswari Ganesan, Tarun Sharma, Rajiv Raman
PURPOSE: To explore any relationship between the markers of early retinal neuronal damage and peripheral diabetic neuropathy in subjects with no diabetic retinopathy (DR). METHODS: A cross-sectional study in which type 2 diabetic subjects (n=743) without DR were studied. Visual functions including visual acuity, contrast sensitivity, colour vision, retinal sensitivity using microperimeter and retinal thicknesses by spectral domain optical coherence tomography were measured...
January 20, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28108555/immune-dysregulation-may-contribute-to-disease-pathogenesis-in-spinal-muscular-atrophy-mice
#7
Marc-Olivier Deguise, Yves De Repentigny, Emily McFall, Nicole Auclair, Subash Sad, Rashmi Kothary
Spinal muscular atrophy (SMA) has long been solely considered a neurodegenerative disorder. However, recent work has highlighted defects in many other cell types that could contribute to disease aetiology. Interestingly, the immune system has never been extensively studied in SMA. Defects in lymphoid organs could exacerbate disease progression by neuroinflammation or immunodeficiency. Smn depletion led to severe alterations in the thymus and spleen of two different mouse models of SMA. The spleen from Smn depleted mice was dramatically smaller at a very young age and its histological architecture was marked by mislocalization of immune cells in the Smn(2B/-) model mice...
January 19, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28108553/the-bright-fluorescent-protein-mneongreen-facilitates-protein-expression-analysis-in-vivo
#8
Lola Hostettler, Laura Grundy, Stéphanie Käser-Pébernard, Chantal Wicky, William R Schafer, Dominique A Glauser
The Green Fluorescent Protein (GFP) has been tremendously useful to investigate cell architecture, protein localization, and protein function. While recent developments in transgenesis and genome editing methods enable working with few transgene copies and, consequently, with physiological expression levels, lower signal intensity might become a limiting factor. The recently developed mNeonGreen protein is a brighter alternative to GFP in vitro The goal of the present study was to determine how mNeonGreen performs in vivo in Caenorhabditis elegans, a model extensively used for fluorescence imaging in intact animals...
January 20, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28108534/cell-biology-and-pathophysiology-of-%C3%AE-synuclein
#9
Jacqueline Burré, Manu Sharma, Thomas C Südhof
α-Synuclein is an abundant neuronal protein that is highly enriched in presynaptic nerve terminals. Genetics and neuropathology studies link α-synuclein to Parkinson's disease (PD) and other neurodegenerative disorders. Accumulation of misfolded oligomers and larger aggregates of α-synuclein defines multiple neurodegenerative diseases called synucleinopathies, but the mechanisms by which α-synuclein acts in neurodegeneration are unknown. Moreover, the normal cellular function of α-synuclein remains debated...
January 20, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28108532/tdp-43-prions
#10
Takashi Nonaka, Masato Hasegawa
The most common neurodegenerative diseases, such as Alzheimer's, Parkinson's, and amyotrophic lateral sclerosis, are all protein-misfolding diseases and are characterized by the presence of disease-specific protein aggregates in affected neuronal cells. Recent studies have shown that, like tau and α-synuclein, TAR-DNA binding protein of 43 kDa (TDP-43) can form aggregates in vitro in a seed-dependent, self-templating, prion-like manner. Insoluble TDP-43 prepared from the brains of patients has been classified into several strains, which can be transferred from cell to cell in vitro, suggesting the involvement of mechanisms reminiscent of those by which prions spread through the nervous system...
January 20, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28108494/the-rich-club-organization-in-rat-functional-brain-network-to-balance-between-communication-cost-and-efficiency
#11
Xia Liang, Li-Ming Hsu, Hanbing Lu, Akira Sumiyoshi, Yong He, Yihong Yang
Network analyses of structural connectivity in the brain have highlighted a set of highly connected hubs that are densely interconnected, forming a "rich-club" substrate in diverse species. Here, we demonstrate the existence of rich-club organization in functional brain networks of rats. Densely interconnected rich-club regions are found to be distributed in multiple brain modules, with the majority located within the putative default mode network. Rich-club members exhibit high wiring cost (as measured by connection distance) and high metabolic running cost (as surrogated by cerebral blood flow), which may have evolved to achieve high network communications to support efficient brain functions...
January 19, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28108491/transcriptome-analysis-identifies-multifaceted-regulatory-mechanisms-dictating-a-genetic-switch-from-neuronal-network-establishment-to-maintenance-during-postnatal-prefrontal-cortex-development
#12
Yvet Kroeze, Martin Oti, Ellen van Beusekom, Roel H M Cooijmans, Hans van Bokhoven, Sharon M Kolk, Judith R Homberg, Huiqing Zhou
The prefrontal cortex (PFC) is one of the latest brain regions to mature, which allows the acquisition of complex cognitive abilities through experience. To unravel the underlying gene expression changes during postnatal development, we performed RNA-sequencing (RNA-seq) in the rat medial PFC (mPFC) at five developmental time points from infancy to adulthood, and analyzed the differential expression of protein-coding genes, long intergenic noncoding RNAs (lincRNAs), and alternative exons. We showed that most expression changes occur in infancy, and that the number of differentially expressed genes reduces toward adulthood...
January 19, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28108489/processing-of-egomotion-consistent-optic-flow-in-the-rhesus-macaque-cortex
#13
Benoit R Cottereau, Andrew T Smith, Samy Rima, Denis Fize, Yseult Héjja-Brichard, Luc Renaud, Camille Lejards, Nathalie Vayssière, Yves Trotter, Jean-Baptiste Durand
The cortical network that processes visual cues to self-motion was characterized with functional magnetic resonance imaging in 3 awake behaving macaques. The experimental protocol was similar to previous human studies in which the responses to a single large optic flow patch were contrasted with responses to an array of 9 similar flow patches. This distinguishes cortical regions where neurons respond to flow in their receptive fields regardless of surrounding motion from those that are sensitive to whether the overall image arises from self-motion...
January 19, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28108397/aav9-igf1-protects-tdp-25-cells-from-apoptosis-and-oxidative-stress-partly-via-up-regulating-the-expression-of-vegf-in-vitro
#14
Zhongyao Li, Weisong Duan, Can Cui, Yaling Liu, Chunyan Li, Yakun Liu
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease lacking of curable treatments to date. Adeno-associated virus (AAV) vectors make gene therapy an effective strategy in treating neurological disorders. Despite Kaspar and colleagues have showed that AAV-IGF1 delivery successfully prolonged the survival of SOD1G93A mice, whether IGF-1 act as a protective role in the TDP-43 mutant model still have not been reported. In this study, we proved that AAV9 vector mediated expression of human wild-type IGF-1 protected TDP-25 cells from apoptosis and oxidative stress...
January 17, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28108396/serotonin-5-ht4-receptors-modulate-the-development-of-glutamatergic-input-to-the-dorsal-raphe-nucleus
#15
Angela Chen, Katherine D Hubbert, Pasha F Foroudi, Vivian F Lu, Skirmantas Janušonis
The dorsal raphe nucleus (DRN) is a major serotonin (5-hydroxytryptamine, 5-HT)-producing region in the central nervous system. It receives glutamatergic inputs from several brain regions, which are reciprocally modulated by serotonergic signals. We investigated whether serotonin 5-HT4 receptors (5-HT4Rs) play a role in the development of glutamatergic control of the DRN, with an emphasis on cortical inputs. Double-label immunohistochemistry and confocal microscopy were used to quantify vesicular glutamate transporter 1 (vGluT1)-immunoreactive terminals in the DRN of mice with a null-mutation in the 5-HT4R gene...
January 17, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28108359/synaptic-targets-chronic-alcohol-actions
#16
REVIEW
Marisa Roberto, Florence Varodayan
Alcohol acts on numerous cellular and molecular targets to regulate neuronal communication within the brain. Chronic alcohol exposure and acute withdrawal generate prominent neuroadaptations at synapses, including compensatory effects on the expression, localization and function of synaptic proteins, channels and receptors. The present article reviews the literature describing the synaptic effects of chronic alcohol exposure and their relevance for synaptic transmission in the central nervous system. This review is not meant to be comprehensive, but rather to highlight the effects that have been observed most consistently and that are thought to contribute to the development of alcohol dependence and the negative aspects of withdrawal...
January 17, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28108358/neurochemical-and-metabolic-effects-of-acute-and-chronic-alcohol-in-the-human-brain-studies-with-positron-emission-tomography
#17
REVIEW
Nora D Volkow, Corinde E Wiers, Ehsan Shokri-Kojori, Dardo Tomasi, Gene-Jack Wang, Ruben Baler
The use of Positron emission tomography (PET) to study the effects of acute and chronic alcohol on the human brain has enhanced our understanding of the mechanisms underlying alcohol's rewarding effects, the neuroadaptations from chronic exposure that contribute to tolerance and withdrawal, and the changes in fronto-striatal circuits that lead to loss of control and enhanced motivation to drink that characterize alcohol use disorders (AUD). These include studies showing that alcohol's reinforcing effects may result not only from its enhancement of dopaminergic, GABAergic and opioid signaling but also from its caloric properties...
January 17, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28108357/sigma-1-receptor-deficiency-reduces-gabaergic-inhibition-in-the-basolateral-amygdala-leading-to-ltd-impairment-and-depressive-like-behaviors
#18
Baofeng Zhang, Ling Wang, Tingting Chen, Juan Hong, Sha Sha, Jun Wang, Hang Xiao, Ling Chen
Sigma-1 receptor knockout (σ1R-/-) in male mice causes depressive-like phenotype. We observed the expression of σ1R in principal neurons of basolateral amygdala (BLA), a main region for affective regulation. The present study investigated the influence of σ1R deficiency in BLA neurons on synaptic properties and plasticity at cortico-BLA pathway. In comparison with wild-type (WT) mice, the slopes of field excitatory postsynaptic potentials (fEPSP) were reduced in σ1R-/- mice with the increases in paired-pulse facilitation (PPF) and paired-pulse inhibition (PPI) values...
January 17, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28108338/dietary-zinc-promotes-immuno-biochemical-plasticity-and-protects-fish-against-multiple-stresses
#19
Neeraj Kumar, K K Krishnani, Paritosh Kumar, Ashish Kumar Jha, Sanjay Kumar Gupta, N P Singh
The abiotic and biotic stress is an episode that effect on regulatory, neuron, endocrine and immune systems of animals including fish. The stress creates stimulatory and suppressive of immune system resulting in increases the incidence of infection. In view of these points, we have conducted an experiment to mitigate the stress through a nutritional approach through Zinc (Zn) supplementation in Pangasius hypophthalmus (initial weight-3.65 ± 0.75 g). Three isocaloric and isonitrogenous diets with graded levels of zinc 0, 10 and 20 mg/kg were prepared and fed to seven different groups with each in triplicate...
January 17, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28108332/sex-dependent-effects-of-early-life-inflammatory-pain-on-sucrose-intake-and-sucrose-associated-hippocampal-arc-expression-in-adult-rats
#20
Yoko O Henderson, Rebecca Nalloor, Almira Vazdarjanova, Anne Z Murphy, Marise B Parent
We hypothesize that dorsal hippocampal (dHC) neurons, which are critical for episodic memory, form a memory of a meal and inhibit the initiation of the next meal and the amount ingested during that meal. In support, we showed previously that (1) consuming a sucrose meal induces expression of the synaptic plasticity marker activity-regulated cytoskeleton-associated protein (Arc) in dHC neurons and (2) reversible inactivation of these neurons immediately following a sucrose meal accelerates the onset of the next meal and increases the size of that meal...
January 17, 2017: Physiology & Behavior
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