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https://www.readbyqxmd.com/read/28646200/mesenchymal-stem-cells-secretome-induced-axonal-outgrowth-is-mediated-by-bdnf
#1
Luís F Martins, Rui O Costa, Joana R Pedro, Paulo Aguiar, Sofia C Serra, Fabio G Teixeira, Nuno Sousa, António J Salgado, Ramiro D Almeida
Mesenchymal stem cells (MSCs) have been used for cell-based therapies in regenerative medicine, with increasing importance in central and peripheral nervous system repair. However, MSCs grafting present disadvantages, such as, a high number of cells required for transplantation and low survival rate when transplanted into the central nervous system (CNS). In line with this, MSCs secretome which present on its composition a wide range of molecules (neurotrophins, cytokines) and microvesicles, can be a solution to surpass these problems...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28645787/striatal-hypodopamine-phenotypes-found-in-transgenic-mice-that-overexpress-glial-cell-line-derived-neurotrophic-factor
#2
Hidekazu Sotoyama, Yuriko Iwakura, Kanako Oda, Toshikuni Sasaoka, Nobuyuki Takei, Akiyoshi Kakita, Hideki Enomoto, Hiroyuki Nawa
Glial cell line-derived neurotrophic factor (GDNF) positively regulates the development and maintenance of in vitro dopaminergic neurons. However, the in vivo influences of GDNF signals on the brain dopamine system are controversial and not fully defined. To address this question, we analyzed dopaminergic phenotypes of the transgenic mice that overexpress GDNF under the control of the glial Gfap promoter in the brain. Compared with wild-type, the GDNF transgenic mice contained higher levels of GDNF protein and phosphorylated RET receptors in the brain...
June 20, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28645077/increased-blood-bdnf-in-healthy-individuals-with-a-family-history-of-depression
#3
Ulla Knorr, Mia H Greisen Søndergaard, Pernille Koefoed, Anders Jørgensen, Maria Faurholt-Jepsen, Maj Vinberg, Lars Vedel Kessing
The brain-derive neurotrophic factor (BDNF) may play an important role in the course of depression. We aimed to study the associations between peripheral whole blood BDNF levels in healthy individuals with and without a family history of depression. BDNF levels were significantly increased in healthy individuals with (n = 76), compared with healthy individuals without (n = 39) a family history of depression and persisted after adjustment for age and gender differences. Higher BDNF levels were associated with increasing age and seasonality...
June 17, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28645061/the-neurochemical-consequences-of-methamphetamine-self-administration-in-male-and-female-rats
#4
Andrew Johansen, Lisa M McFadden
BACKGROUND: Methamphetamine (METH) is an addictive substance that is used in both males and females. Few preclinical studies have focused on understanding sex-differences in the neurochemical consequences of contingent METH. The purpose of the current study was to investigate potential sex-differences in the neurochemical consequences of METH self-administration. METHODS: Male and female adult rats were given extended access to METH or saline self-administration for 7d...
June 6, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28644021/synthesis-of-11-o-debenzoyltashironin-neurotrophic-sesquiterpenes-cause-hyperexcitation
#5
Masaki Ohtawa, Michael J Krambis, Rok Cerne, Jeffrey M Schkeryantz, Jeffrey Witkin, Ryan A Shenvi
11-O-Debenzoyltashironin (1) is a member of the neurotrophic sesquiterpenes, trace plant metabolites that enhance neurite outgrowth in cultured neurons. Here we report its synthesis in six steps from a butenolide heterodimer via its likely biosynthetic precursor, 3,6-dideoxy-10-hydroxypseudoanisatin, here identified as the chain tautomer of 1. Access to the tashironin chemotype fills a gap in a comparison set of convulsive and neurotrophic sesquiterpenes, which we hypothesized to share a common target. Here we show that both classes mutually hyperexcite rat cortical neurons, consistent with antagonism of inhibitory channels...
June 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28642578/human-endothelial-cells-secrete-neurotropic-factors-to-direct-axonal-growth-of-peripheral-nerves
#6
Jonathan M Grasman, David L Kaplan
Understanding how nerves spontaneously innervate tissues or regenerate small injuries is critical to enhance material-based interventions to regenerate large scale, traumatic injuries. During embryogenesis, neural and vascular tissues form interconnected, complex networks as a result of signaling between these tissue types. Here, we report that human endothelial cells (HUVECs) secrete brain-derived neurotrophic factor (BDNF), which significantly stimulated axonal growth from chicken or rat dorsal root ganglia (DRGs)...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642149/activated-mglur5-protects-bv2-cells-against-ogd-r-induced-cytotoxicity-by-modulating-bdnf-trkb-pathway
#7
Xinchun Ye, Lu Yu, Dandan Zuo, Liang Zhang, Jie Zu, Jinxia Hu, Jiao Tang, Lei Bao, Chengcheng Cui, Ruixue Zhang, Guoliang Jin, Kun Zan, Zuohui Zhang, Xinxin Yang, Hongjuan Shi, Zunsheng Zhang, Qihua Xiao, Yonghai Liu, Jie Xiang, Xueling Zhang, Guiyun Cui
Activated Metabotropic glutamate receptors 5(mGluR5) exhibits protective effects against ischemic brain damage, but the underlying mechanisms are not clearly known. Brain-derived neurotrophic factor (BDNF), as a valuable member of neurotrophic factor family, exerts its protection by combining with its high-affinity receptor tyrosine protein kinase B (TrkB). To investigate the role of activated mGluR5 against oxygen-glucose deprivation (OGD)/reoxygenation (R)-mediated cytotoxicity, the cell viability, apoptosis, the release of inflammatory cytokines and accumulation of reactive oxygen species (ROS) were evaluated in BV2 cells (Microglia cell line) with or without OGD/R exposure...
June 19, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28641491/nicotine-and-cigarette-smoke-modulate-nrf2-bdnf-dopaminergic-signal-and-neurobehavioral-disorders-in-adult-rat-cerebral-cortex
#8
Nibedita Naha, D N Gandhi, A K Gautam, J Ravi Prakash
BACKGROUND: Nicotine and cigarette smoking (CS) are associated with addiction behavior, drug-seeking, and abuse. However, the mechanisms that mediate this association especially, the role of brain-derived neurotrophic factor (BDNF), dopamine (DA), and nuclear factor erythroid 2-related factor 2 (Nrf2) signaling in the cerebral cortex, are not fully known. Therefore, we hypothesized that overexpression of BDNF and DA, and suppression of Nrf2 contribute to several pathological and behavioral alterations in adult cerebral cortex...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28640632/gut-microbiota-nitric-oxide-and-microglia-as-pre-requisites-for-neurodegenerative-disorders
#9
Joyce Ka Yu Tse
Regulating fluctuating endogenous nitric oxide (NO) levels is necessary for proper physiological functions. Aberrant NO pathways are implicated in a number of neurological disorders, including Alzheimer's Disease (AD) and Parkinson's Disease. The mechanism of NO in oxidative and nitrosative stress with pathological consequences involves reactions with reactive oxygen species (e.g. superoxide) to form the highly reactive peroxynitrite, hydrogen peroxide, hypochloride ions and hydroxyl radical. NO levels are typically regulated by endogenous nitric oxide synthases (NOS), and inflammatory iNOS is implicated in the pathogenesis of neurodegenerative diseases, in which elevated NO mediates axonal degeneration and activates cyclooxygenases to provoke neuroinflammation...
June 22, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28640008/brain-derived-neurotrophic-factor-propeptide-inhibits-proliferation-and-induces-apoptosis-in-c6-glioma-cells
#10
Bangkun Yang, Jun Qin, Ying Nie, Yong Li, Qianxue Chen
There are several forms of brain-derived neurotrophic factor (BDNF), the precursor of BDNF, mature BDNF, and BDNF propeptide. They exert different effects through different transmembrane receptor signaling systems. Precursor of BDNF is enzymatically cleaved, either by intracellular or by extracellular proteases, to generate mature BDNF and its propeptide (BDNF propeptide). The aim of this study was to evaluate the potential molecular mechanisms that underlie the inhibition of glioma cell growth by the BDNF propeptide...
June 21, 2017: Neuroreport
https://www.readbyqxmd.com/read/28639367/a-polydopamine-peptide-coating-enables-adipose-derived-stem-cell-growth-on-the-silicone-surface-of-cochlear-implant-electrode-arrays
#11
Philipp Schendzielorz, Kristen Rak, Katrin Radeloff, Johannes Völker, Thomas Gehrke, Agmal Scherzad, Norbert Kleinsasser, Rudolf Hagen, Andreas Radeloff
The simultaneous application of neurotrophic factors with cochlear implantation is proposed to enhance the bioelectrical interface between electrodes and auditory neurons, and thus improve speech intelligibility in patients with cochlear implants (CIs). In cell-based approaches, the goal is to colonize CIs with cells producing neurotrophic factors. This study aims to evaluate whether a polydopamine (PD) functionalization of the hydrophobic silicone surface of the electrode carrier enables colonization of adipose-derived stem cells known to deliver neurotrophic factors...
June 22, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28638713/the-behavioral-and-physiological-effects-of-high-fat-diet-and-alcohol-consumption-sex-differences-in-c57bl6-j-mice
#12
Rachel R Gelineau, Nicole L Arruda, Jasmin A Hicks, Isabella Monteiro De Pina, Aikaterini Hatzidis, Joseph A Seggio
BACKGROUND AND OBJECTIVE: Animal studies can be a great tool to investigate sex differences in a variety of different ways, including behavioral and physiological responses to drug treatments and different "lifestyle variables" such as diets. Consumption of both high-fat diets and alcohol is known to affect anxiety behaviors and overall health. This project investigated how high-fat diet and alcohol access and its combination affected the behavior and physiology of male and female C57BL/6J mice...
June 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28638711/decrease-in-brain-derived-neurotrophic-factor-at-plasma-level-but-not-in-serum-concentrations-in-suicide-behavior-a%C3%A2-systematic-review-and-meta-analysis
#13
Marisol Salas-Magaña, Carlos A Tovilla-Zárate, Thelma B González-Castro, Isela E Juárez-Rojop, María L López-Narváez, José M Rodríguez-Pérez, Julián Ramírez Bello
INTRODUCTION: Suicide is known as a major health concern worldwide. There is evidence for the role of brain-derived neurotrophic factor (BDNF) in suicide behavior. Therefore, this factor has been proposed as a biomarker for suicide behavior. Clinical studies have measured BDNF concentrations at central and peripheral levels. As a consequence, the aim of this study was to assess BDNF levels in blood plasma and serum to see whether there is a difference in concentrations in patients with suicide behavior when compared to those in controls, using a meta-analysis approach...
June 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28637335/astrocyte-produced-mir-146a-as-a-mediator-of-motor-neuron-loss-in-spinal-muscular-atrophy
#14
Samantha L Sison, Teresa N Patitucci, Emily R Seminary, Eric Villalon, Christian L Lorson, Allison D Ebert
Spinal muscular atrophy (SMA), the leading genetic cause of infant mortality, is caused by loss of the survival motor neuron-1 (SMN1) gene, which leads to motor neuron loss, muscle atrophy, respiratory distress, and death. Motor neurons exhibit the most profound loss, but the mechanisms underlying disease pathogenesis are not fully understood. Recent evidence suggests that motor neuron extrinsic influences, such as those arising from astrocytes, contribute to motor neuron malfunction and loss. Here we investigated both loss-of-function and toxic gain-of-function astrocyte mechanisms that could play a role in SMA pathology...
June 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28637174/effect-of-prenatal-exposure-to-waterpipe-tobacco-smoke-on-learning-and-memory-of-adult-offspring-rats
#15
Nour Al-Sawalha, Karem Alzoubi, Omar Khabour, Weam Alyacoub, Yehya Almahmmod, Thomas Eissenberg
Introduction: Waterpipe tobacco smoking has increased in prevalence worldwide, including among pregnant women. In this study, we investigated the effect of prenatal maternal waterpipe tobacco smoke (WTS) exposure during different stages of pregnancy on learning and memory of adult offspring rats. Methods: Pregnant rats received either fresh air or mainstream WTS (two hours daily) during early, mid, late, or whole gestational period. Male offspring rats were followed through 20 weeks...
June 20, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28635142/protective-effects-induced-by-microwave-assisted-aqueous-harpagophytum-extract-on-rat-cortex-synaptosomes-challenged-with-amyloid-%C3%AE-peptide
#16
Claudio Ferrante, Lucia Recinella, Marcello Locatelli, Paolo Guglielmi, Daniela Secci, Lidia Leporini, Annalisa Chiavaroli, Sheila Leone, Sara Martinotti, Luigi Brunetti, Michele Vacca, Luigi Menghini, Giustino Orlando
Harpagophytum procumbens is a plant species that displays anti-inflammatory properties in multiple tissues. The iridoid glycosides arpagoside, harpagide, and procumbide appear to be the most therapeutically important constituents. In addition, harpagoside treatment exerted neuroprotective effects both in vitro and in vivo. Considering these findings, the aim of the present work is to explore the possible protective role of the previously described microwave-assisted aqueous extract of H. procumbens on rat hypothalamic (Hypo-E22) cells, and in rat cortex challenged with amyloid β-peptide (1-40)...
June 21, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28634464/anti-inflammatory-and-neuroprotective-effects-of-co-ultrapealut-in-a-mouse-model-of-vascular-dementia
#17
Rosalba Siracusa, Daniela Impellizzeri, Marika Cordaro, Rosalia Crupi, Emanuela Esposito, Stefania Petrosino, Salvatore Cuzzocrea
Vascular dementia (VaD), the second most common cause of cognitive impairment in the population, is a disease that results from reduction in regional cerebral blood flow and involves oxidative stress and inflammation. Co-ultramicronized PEALut (co-ultra PEALut) is a new compound with beneficial effects, which include anti-inflammatory and antioxidant properties. Recently, co-ultraPEALut has been shown to exhibit neuroprotective effects in models of Parkinson's disease, cerebral ischemia and Alzheimer's disease...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28634349/synuclein-impairs-trafficking-and-signaling-of-bdnf-in-a-mouse-model-of-parkinson-s-disease
#18
Fang Fang, Wanlin Yang, Jazmin B Florio, Edward Rockenstein, Brian Spencer, Xavier M Orain, Stephanie X Dong, Huayan Li, Xuqiao Chen, Kijung Sung, Robert A Rissman, Eliezer Masliah, Jianqing Ding, Chengbiao Wu
Recent studies have demonstrated that hyperphosphorylation of tau protein plays a role in neuronal toxicities of α-synuclein (ASYN) in neurodegenerative disease such as familial Alzheimer's disease (AD), dementia with Lewy bodies (DLB) and Parkinson's disease. Using a transgenic mouse model of Parkinson's disease (PD) that expresses GFP-ASYN driven by the PDGF-β promoter, we investigated how accumulation of ASYN impacted axonal function. We found that retrograde axonal trafficking of brain-derived neurotrophic factor (BDNF) in DIV7 cultures of E18 cortical neurons was markedly impaired at the embryonic stage, even though hyperphosphorylation of tau was not detectable in these neurons at this stage...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634074/distinct-regulation-of-activity-dependent-transcription-of-immediate-early-genes-in-cultured-rat-cortical-neurons
#19
Mamoru Fukuchi, Tomofumi Sanabe, Toshifumi Watanabe, Takane Kubota, Akiko Tabuchi, Masaaki Tsuda
The activity-regulated expression of immediate early genes (IEGs) contributes to long-lasting neuronal functions underlying long-term memory. However, their response properties following neuronal activity are unique and remain poorly understood. To address this knowledge gap, here we further investigated the response properties of two representative IEGs, c-fos and brain-derived neurotrophic factor (Bdnf). Treatment of cultured cortical cells with KCl produces a depolarization process that results in the increase of intracellular calcium concentration in a KCl concentration-dependent manner...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28632969/vegf-is-neuroprotective-against-ischemic-brain-injury-by-inhibiting-scavenger-receptor-a-expression-on-microglia
#20
Zheng Xu, Kaiwei Han, Jigang Chen, Chunhui Wang, Yan Dong, Mingkun Yu, Rulin Bai, Chenguang Huang, Lijun Hou
Vascular endothelial growth factor (VEGF) is a secreted mitogen associated with angiogenesis. VEGF has long been thought to be a potent neurotrophic factor for the survival of spinal cord neuron. However, the role of VEGF in the regulation of ischemic brain injury remains unclear. In the study rats were subjected to MCAO (middle cerebral artery occlusion) followed by intraperitoneal injection of VEGF165 (10 mg/kg) immediately after surgery and once daily till the day 10, and the expression of target genes was assayed using qPCR, western blot and immunofluorescence, and the role of VEGF165 in regulating ischemic brain injury was assayed...
June 20, 2017: Journal of Neurochemistry
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