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https://www.readbyqxmd.com/read/29038238/delayed-maturation-of-fast-spiking-interneurons-is-rectified-by-activation-of-the-trkb-receptor-in-the-mouse-model-of-fragile-x-syndrome
#1
Toshihiro Nomura, Timothy F Musial, John J Marshall, Yiwen Zhu, Christine L Remmers, Jian Xu, Daniel A Nicholson, Anis Contractor
Fragile X syndrome (FXS) is a neurodevelopmental disorder that is a leading cause of inherited intellectual disability, and the most common known cause of autism spectrum disorder (ASD). FXS is broadly characterized by sensory hypersensitivity and several developmental alterations in synaptic and circuit function have been uncovered in the sensory cortex of the mouse model of FXS (Fmr1 KO). GABA mediated neurotransmission and fast-spiking (FS) GABAergic interneurons are central to cortical circuit development in the neonate...
October 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29029315/7-8-dihydroxyflavone-rescues-lead-induced-impairment-of-vesicular-release-a-novel-therapeutic-approach-for-lead-intoxicated-children
#2
Xiao-Lei Zhang, Jennifer L McGlothan, Omid Miry, Kirstie H Stansfield, Meredith K Loth, Patric K Stanton, Tomás R Guilarte
Childhood lead (Pb2+) intoxication is a public health problem of global proportion. Lead exposure during development produces multiple effects on the central nervous system including impaired synapse formation, altered synaptic plasticity, and learning deficits.In primary hippocampal neurons in culture and hippocampal slices, Pb2+ exposure inhibits vesicular release and reduces the number of fast-releasing sites, an effect associated with Pb2+ inhibition of NMDA receptor-mediated trans-synaptic Brain-Derived Neurotrophic Factor (BDNF) signaling...
October 4, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29028593/genetic-variations-in-the-p11-tpa-bdnf-pathway-are-associated-with-post-stroke-depression
#3
Jinfeng Liang, Yingying Yue, Haitang Jiang, Deqin Geng, Jun Wang, Jianxin Lu, Shenghua Li, Kezhong Zhang, Aiqin Wu, Yonggui Yuan
BACKGROUND: The effects of BDNF on post stroke depression (PSD) may be influenced by genetic variations in intracellular signal transduction pathways, such as the p11/tPA/BDNF pathway. In this study, we aimed to determine the association of polymorphisms in candidate genes of the gene transduction pathway with PSD, as well as the effects of the interactions between genes in our Chinese sample. METHODS: Two-hundred-fifty-four Chinese samples with acute ischaemic stroke included 122 PSD patients and 132 nonPSD patients...
September 29, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29024578/morpho-functional-features-of-the-gonads-of-danio-rerio-the-role-of-brain-derived-neurotrophic-factor
#4
Pietro Cacialli, Livia D'Angelo, Paolo de Girolamo, Luigi Avallone, Carla Lucini, Elisabeth Pellegrini, Luciana Castaldo
Zebrafish, a suitable and widely used teleost fish model in basic biomedical research, displays morphophysiological features of adult gonads that share some commonalities with those of mammalian species. In mammals, gametogenesis is regulated, among several factors, by brain derived neurotrophic factor (BDNF). This neurotrophin has a well-established role in the developing and adult nervous system, as well as gonads development and functions in vertebrates pecies. We hypothesize that BDNF has a role also in the gonadal functions of zebrafish...
October 12, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29021191/enhancement-of-phrenic-long-term-facilitation-following-repetitive-acute-intermittent-hypoxia-is-blocked-by-the-glycolytic-inhibitor-2-deoxyglucose
#5
Peter M MacFarlane, Stephane Vinit, Gordon S Mitchell
Moderate acute intermittent hypoxia (mAIH) elicits a form of respiratory motor plasticity known as phrenic long-term facilitation (pLTF). Preconditioning with modest protocols of chronic intermittent hypoxia enhances pLTF, demonstrating pLTF metaplasticity. Since "low dose" protocols of repetitive acute intermittent hypoxia show promise as a therapeutic modality to restore respiratory (and non-respiratory) motor function in clinical disorders with compromised breathing, we tested the hypothesis that preconditioning with a mild repetitive AIH (rAIH) protocol enhances pLTF and hypoglossal (XII) LTF, and whether the enhancement is regulated by glycolytic flux...
October 11, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28993209/rotigotine-a-dopamine-receptor-agonist-increased-bdnf-protein-levels-in-the-rat-cortex-and-hippocampus
#6
Naoki Adachi, Aya Yoshimura, Shuichi Chiba, Shintaro Ogawa, Hiroshi Kunugi
Brain-derived neurotrophic factor (BDNF) critically controls the fate and function of the neuronal network and has received much attention as a target of many brain diseases. Dopaminergic system dysfunction has also been implicated in a variety of neuropsychiatric diseases. Rotigotine, a non-ergot dopamine receptor agonist, is used in the treatment of Parkinson's disease and restless legs syndrome. To investigate the effects of rotigotine on neuronal functions both in vivo and in vitro, rats and primary cortical neurons were administered rotigotine, and the mRNA and protein expression levels of BDNF, its receptor TrkB and downstream signaling molecules, and synaptic proteins were determined...
October 6, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28981195/nhe5-deficiency-enhances-learning-and-memory-via-upregulating-bdnf-trkb-signaling-in-mice
#7
Xuejiao Chen, Xiyi Wang, Lingyun Tang, Jinjin Wang, Chunling Shen, Jianbing Liu, Shunyuan Lu, Hongxin Zhang, Ying Kuang, Jian Fei, Zhugang Wang
Nhe5, a Na(+) /H(+) exchanger, is predominantly expressed in brain tissue and is proposed to act as a negative regulator of dendritic spine growth. Up to now, its physiological function in vivo remains unclear. Here we show that Nhe5-deficient mice exhibit markedly enhanced learning and memory in Morris water maze, novel object recognition, and passive avoidance task. Meanwhile, the pre- and post-synaptic components, synaptophysin (Syn) and post-synaptic density 95 (PSD95) expression levels were found increased in hippocampal regions lacking of Nhe5, suggesting a possible alterations in neuronal synaptic structure and function in Nhe5(-/-) mice...
October 5, 2017: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
https://www.readbyqxmd.com/read/28968898/loss-of-trkb-signaling-in-parvalbumin-expressing-basket-cells-results-in-network-activity-disruption-and-abnormal-behavior
#8
Dionysios Xenos, Marija Kamceva, Simone Tomasi, Jessica A Cardin, Michael L Schwartz, Flora M Vaccarino
The GABAergic system is regulated by the brain-derived neurotrophic factor (BDNF)/Tropomyosin-related kinase B (TrkB) pathway, but the cell-intrinsic role of TrkB signaling in parvalbumin cortical interneuron development and function is unclear. We performed conditional ablation of the TrkB receptor in parvalbumin-expressing (PV) interneurons to study whether postnatal loss of TrkB in parvalbumin cells affects their survival, connectivity, spontaneous and evoked neuronal activity and behavior. Using in vivo recordings of local field potentials, we found reduced gamma oscillations in the sensory cortex of PVcre+; TrkBF/F conditional knockout mice (TrkB cKO), along with increased firing of putative excitatory neurons...
August 18, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28967682/differential-expression-of-micrornas-in-tm3-leydig-cells-of-mice-treated-with-brain-derived-neurotrophic-factor
#9
Shan Gao, Chunjin Li, Ying Xu, Shuxiong Chen, Yun Zhao, Lu Chen, Yanwen Jiang, Zhuo Liu, Rong Fan, Liting Sun, Fengge Wang, Xiaoling Zhu, Jing Zhang, Xu Zhou
Brain-derived neurotrophic factor (BDNF) is a neurotrophin that can promote the development and proliferation of neurons. BDNF has been found to be involved in male reproduction. Leydig cells in testicular interstitial tissues can secrete testosterone in a luteinizing hormone-dependent manner. We showed that BDNF and its receptor TrkB were expressed in mice TM3 Leydig cells in the present study. Furthermore, BDNF can promote proliferation of mouse TM3 Leydig cells in vitro. Results of microRNA (miRNA) deep sequencing showed that BDNF can alter the expression profile of miRNAs in TM3 Leydig cells...
October 2, 2017: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/28966935/brain-derived-neutrophic-factor-bdnf-coordinates-lympho-vascular-metastasis-through-a-fibroblast-governed-paracrine-axis-in-the-tumor-microenvironment
#10
Tilahun Jiffar, Turker Yilmaz, Junegoo Lee, Yair Miller, Lei Feng, Adel El-Naggar, Michael E Kupferman
It has long been known that the tumor microenvironment contributes to the proliferation and survival of neoplasms through the constant interaction with the stromal and immune compartments. In this investigation, we explored the role of cancer-associated fibroblasts (CAFs) in the regulation of the tumor microenvironment in head and neck squamous cell carcinoma (HNSCC) though a complex intercellular BDNF-TrkB signaling system. Our studies show that conditioned media derived from patient-derived CAFs promoted HNSCC cell proliferation, in vitro cell migration, cell invasion and chemotherapy resistance, compared to normal fibroblasts...
2017: Cancer Cell & Microenvironment
https://www.readbyqxmd.com/read/28966252/inhibitory-effects-of-polyacetylene-compounds-from-panax-ginseng-on-neurotrophin-receptor-mediated-hair-growth
#11
Aoi Suzuki, Daisuke Matsuura, Hirotoshi Kanatani, Shingo Yano, Mitsuo Tsunakawa, Shigeru Matsuyama, Hideyuki Shigemori
Neurotrophins play an important role in the control of the hair growth cycle. Therefore, neurotrophin receptor antagonists have therapeutic potential for the treatment of hair growth disorders. In this study, we investigated the inhibitory effect of Panax ginseng, a medicinal plant commonly used to treat alopecia, on the binding of neurotrophins to their receptors. In addition, we isolated and characterized the bioactive compounds of P. ginseng extracts. P. ginseng hexane extracts strongly inhibited brain-derived neurotrophic factor (BDNF)-TrkB and β-nerve growth factor (β-NGF)-p75 neurotrophin receptor (p75NTR) binding...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28965325/location-and-number-of-astrocytes-determine-dopaminergic-neuron-survival-and-function-under-6-ohda-stress-mediated-through-differential-bdnf-release
#12
Indrani Datta, Kavina Ganapathy, Rema Razdan, Ramesh Bhonde
While astrocytes throughout the CNS share many common traits, they exhibit significant differences in function and number among brain regions. The aim of the present study is to assess the effect of region-specificity and number of astrocytes on the survival of dopaminergic neurons under stress, and to understand the possible mechanism by which these astrocytes extend neuroprotection to dopaminergic neurons. Purified astrocytes obtained from forebrain, midbrain, and hindbrain region were characterized through FACS and immunofluorescence...
September 30, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28962922/treadmill-exercise-alleviated-prenatal-buprenorphine-exposure-induced-depression-in-rats
#13
Chih-Cheng Wu, Chih-Jen Hung, Shih-Yi Lin, Ya-Yu Wang, Cheng-Yi Chang, Wen-Ying Chen, Su-Lan Liao, Shue-Ling Raung, Ching-Ping Yang, Chun-Jung Chen
Mounting evidence suggests that physical exercise shows health benefits in a range of diseases, including psychiatric disorders. Perinatal opioid exposure produces neurobehavioral abnormality, which includes depression symptoms, in patients and their offspring following chronic use of buprenorphine, a mixed agonist/antagonist with a high affinity to opioid receptors, for pain control. Previously, we demonstrated that prenatal buprenorphine exposure in pregnant Sprague-Dawley rats starting from gestation day 7 and lasting for 14 days caused the development of depression-like phenotypes in pups at postnatal day 21...
September 27, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28962170/electro-acupuncture-ameliorates-cognitive-impairment-via-improvement-of-brain-derived-neurotropic-factor-mediated-hippocampal-synaptic-plasticity-in-cerebral-ischemia-reperfusion-injured-rats
#14
Ruhui Lin, Xiaojie Li, Weilin Liu, Wenlie Chen, Kunqiang Yu, Congkuai Zhao, Jia Huang, Shanli Yang, Hongwei Peng, Jing Tao, Lidian Chen
A previous study by our group found that electro-acupuncture (EA) at the Shenting (DU24) and Baihui (DU20) acupoints ameliorates cognitive impairment in rats with cerebral ischemia-reperfusion (I/R) injury. However, the precise mechanism of action has remained largely unknown. The present study investigated whether brain-derived neurotropic factor (BDNF) mediates hippocampal synaptic plasticity as the underlying mechanism. Rats were randomly divided into three groups: The sham operation control (Sham) group, the focal cerebral ischemia-reperfusion (I/R) group, and the I/R with EA treatment (I/R+EA) group...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28958685/saikosaponin-a-attenuates-perimenopausal-depression-like-symptoms-by-chronic-unpredictable-mild-stress
#15
Xue-Qin Chen, Shu-Jiao Chen, Wen-Na Liang, Miao Wang, Cheng-Fu Li, Shuang-Shuang Wang, Shu-Qi Dong, Li-Tao Yi, Can-Dong Li
Accumulating studies have shown that a traditional Chinese decoction Chaihu-Shugan-San produced the antidepressant-like effects in rodents including in perimenopausal. Previous studies and our preliminary study indicated that saikosaponin A, one of the main constituents of Chaihu-Shugan-San, enhanced brain-derived neurotrophic factor (BDNF) expression in rats. Herein, this study aimed to evaluate the antidepressant-like effects of saikosaponin A in perimenopausal rats exposed to chronic unpredictable mild stress (CUMS)...
September 25, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28951257/protective-effects-of-the-neurosteroid-allopregnanolone-in-a-mouse-model-of-spontaneous-motoneuron-degeneration
#16
Maria Meyer, Laura I Garay, María Sol Kruse, Agustina Lara, Gisella Gargiulo-Monachelli, Michael Schumacher, Rachida Guennoun, Hector Coirini, Alejandro F De Nicola, Maria Claudia Gonzalez Deniselle
Amyotrophic lateral sclerosis (ALS) is a devastating disorder characterized by progressive death of motoneurons. The Wobbler (WR) mouse is a preclinical model sharing neuropathological similarities with human ALS. We have shown that progesterone (PROG) prevents the progression of motoneuron degeneration. We now studied if allopregnanolone (ALLO), a reduced metabolite of PROG endowed with gabaergic activity, also prevents WR neuropathology. Sixty-day old WRs remained untreated or received two steroid treatment regimens in order to evaluate the response of several parameters during early or prolonged steroid administration...
September 22, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28947394/ptpn11-induces-endoplasmic-stress-and-apoptosis-in-sh-sy5y-cells
#17
Nitin Chitranshi, Yogita Dheer, Veer Gupta, Mojdeh Abbasi, Mehdi Mirzaei, Yuyi You, Roger Chung, Stuart L Graham, Vivek Gupta
PTPN11 is associated with regulation of growth factor signaling pathways in neuronal cells. Using SH-SY5Y neuroblastoma cells, we showed that adeno-associated virus (AAV)-mediated PTPN11 upregulation was associated with TrkB antagonism, reduced neuritogenesis and enhanced endoplasmic reticulum (ER) stress response leading to apoptotic changes. Genetic knock-down of PTPN11 on the other hand leads to increased TrkB phosphorylation in SH-SY5Y cells. ER stress response induced by PTPN11 upregulation was alleviated pharmacologically by a TrkB agonist...
September 22, 2017: Neuroscience
https://www.readbyqxmd.com/read/28945929/fisetin-provides-antidepressant-effects-by-activating-the-trkb-signal-pathway-in-mice
#18
Yamin Wang, Bin Wang, Jiaqi Lu, Haixia Shi, Siyi Gong, Yufan Wang, Ronald C Hamdy, Balvin H L Chua, Lingli Yang, Xingshun Xu
Depression has been associated with a low-grade chronic inflammatory state, suggesting a potential therapeutic role for anti-inflammatory agents. Fisetin is a naturally occurring flavonoid in strawberries that has anti-inflammatory activities, but whether fisetin has antidepressant effects is unknown. In this study, we exposed mice to spatial restraint for 2 weeks with or without treatment with fisetin. Immobility time in the forced swimming and tail suspension test after this restraint increased in the untreated group, but this increase did not occur in the fisetin group...
September 25, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28944854/effect-of-hippocampal-l%C3%A2-nbp-on-bdnf-and-trkb-expression-and-neurological-function-of-vascular-dementia-rats
#19
Yujing Huang, Zhaohui Li, Guangxian Nan
The pathogenesis of vascular dementia (VD) is associated with neuronal degeneration, apoptosis or necrosis following ischemic brain injury. L‑butylphthalide (L‑NBP), has been demonstrated to exhibit potent anti‑ischemic and anti‑VD effects, however the associated specific mechanism remains to be elucidated. The present study generated a VD rat model, in which the effect of L‑NBP on neurological function and expression levels of brain‑derived neurotrophic factor (BDNF) and tyrosine kinase receptor B (TrkB) were observed...
November 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28943602/deltamethrin-increases-neurite-outgrowth-in-cortical-neurons-through-endogenous-bdnf-trkb-pathways
#20
Daisuke Ihara, Mamoru Fukuchi, Momoko Katakai, Yo Shinoda, Ritsuko Katoh-Semba, Teiichi Furuichi, Mitsuru Ishikawa, Akiko Tabuchi, Masaaki Tsuda
Deltamethrin (DM), a type II pyrethroid, robustly increases brain-derived neurotrophic factor (Bdnf) expression and has a neurotrophic effect in primary cultures of rat cortical neurons. In this study, we investigated the effect of DM on neurite morphology in cultured rat cortical neurons. DM significantly increased neurite outgrowth, but this increase was abolished when the BDNF scavenger tropomyosin receptor kinase B (TrkB)-Fc was added 10 min before the DM treatment. In contrast, the addition of TrkB-Fc 1 h after the treatment did not affect DM-induced neurite outgrowth...
September 23, 2017: Cell Structure and Function
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