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https://www.readbyqxmd.com/read/29118923/ddx3-binding-with-ck1%C3%AE%C2%B5-was-closely-related-to-motor-neuron-degeneration-of-als-by-affecting-neurite-outgrowth
#1
Yanchun Chen, Qing Wang, Qiaozhen Wang, Huancai Liu, Fenghua Zhou, Yawen Zhang, Meng Yuan, Chunyan Zhao, Yingjun Guan, Xin Wang
Amyotrophic lateral sclerosis (ALS) is a chronic neurodegenerative disease characterized by progressive degeneration of motor neurons. The pathogenesis of ALS remains largely unknown. RNA helicase DDX3 is a multifunctional protein involved in several steps of gene expression. Casein kinase 1ε (CK1ε) is an important signal molecule of Wnt signaling pathway and is closely related to neurite growth. However, the roles of DDX3 and CK1ε in the pathogenesis of ALS remain unclear. In this study, we first investigated the expression of DDX3 and CK1ε in the spinal cord of SOD1-G93A ALS transgenic mice using RT-PCR, Western blot and immunohistochemical technique...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/29115610/overexpression-of-mir%C3%A2-21-promotes-neural-stem-cell-proliferation-and-neural-differentiation-via-the-wnt-%C3%AE-%C3%A2-catenin-signaling-pathway-in-vitro
#2
Wei-Min Zhang, Zhi-Ren Zhang, Xi-Tao Yang, Yong-Gang Zhang, Yan-Sheng Gao
The primary aim of the present study was to examine the effects of microRNA‑21 (miR‑21) on the proliferation and differentiation of rat primary neural stem cells (NSCs) in vitro. miR‑21 was overexpressed in NSCs by transfection with a miR‑21 mimic. The effects of miR‑21 overexpression on NSC proliferation were revealed by Cell Counting kit 8 and 5‑ethynyl‑2'‑deoxyuridine incorporation assay, and miR‑21 overexpression was revealed to increase NSC proliferation. miR‑21 overexpression was confirmed using reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR)...
October 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29114039/neuronal-activity-drives-fmrp-and-hspg-dependent-matrix-metalloproteinase-function-required-for-rapid-synaptogenesis
#3
Mary L Dear, Jarrod Shilts, Kendal Broadie
Matrix metalloproteinase (MMP) functions modulate synapse formation and activity-dependent plasticity. Aberrant MMP activity is implicated in fragile X syndrome (FXS), a disease caused by the loss of the RNA-binding protein FMRP and characterized by neurological dysfunction and intellectual disability. Gene expression studies in Drosophila suggest that Mmps cooperate with the heparan sulfate proteoglycan (HSPG) glypican co-receptor Dally-like protein (Dlp) to restrict trans-synaptic Wnt signaling and that synaptogenic defects in the fly model of FXS are alleviated by either inhibition of Mmp or genetic reduction of Dlp...
November 7, 2017: Science Signaling
https://www.readbyqxmd.com/read/29108471/intranasally-delivered-wnt3a-improves-functional-recovery-after-traumatic-brain-injury-by-modulating-autophagic-apoptotic-and-regenerative-pathways-in-the-mouse-brain
#4
James Ya Zhang, Jinhwan Lee, Xiaohuan Gu, Zheng Wei, Mallory Jessica Harris, Shan Ping P Yu, Ling Wei
Traumatic brain injury (TBI) is a prevalent disorder, but no effective therapies currently exist. An underlying pathophysiology of TBI includes the pathologic elevation of autophagy. β-Catenin, a downstream mediator of the canonical Wnt pathway, is a repressor of autophagy. The Wnt/β-catenin pathway plays a crucial role in cell proliferation and neuronal plasticity/repair in the adult brain. We hypothesized that activation of this pathway could promote neuroprotection and neural regeneration following TBI...
November 6, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29107593/escape-from-pluripotency-via-inhibition-of-tgf-%C3%AE-bmp-and-activation-of-wnt-signaling-accelerates-differentiation-and-aging-in-hpsc-progeny-cells
#5
Koki Fujimori, Takuya Matsumoto, Fumihiko Kisa, Nobutaka Hattori, Hideyuki Okano, Wado Akamatsu
Human pluripotent stem cells (hPSCs) represent a potentially valuable cell source for applications in cell replacement therapy, drug development, and disease modeling. For all these uses, it is necessary to develop reproducible and robust protocols for differentiation into desired cell types. However, differentiation protocols remain unstable and inefficient, which makes minimizing the differentiation variance among hPSC lines and obtaining purified terminally differentiated cells extremely time consuming. Here, we report a simple treatment with three small molecules-SB431542, dorsomorphine, and CHIR99021-that enhanced hPSC differentiation into three germ layers with a chemically transitional embryoid-body-like state (CTraS)...
November 14, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/29106556/location-matters-distinct-dna-methylation-patterns-in-gabaergic-interneuronal-populations-from-separate-microcircuits-within-the-human-hippocampus
#6
W Brad Ruzicka, Sivan Subburaju, Joseph T Coyle, Francine M Benes
Recent studies describe distinct DNA methylomes among phenotypic subclasses of neurons in the human brain, but variation in DNA methylation between common neuronal phenotypes distinguished by their function within distinct neural circuits remains an unexplored concept. Studies able to resolve epigenetic profiles at the level of microcircuits are needed to illuminate chromatin dynamics in the regulation of specific neuronal populations and circuits mediating normal and abnormal behaviors.The Illumina HumanMethylation450 BeadChip was used to assess genome-wide DNA methylation in stratum oriens GABAergic interneurons sampled by laser-microdissection from two discrete microcircuits along the trisynaptic pathway in postmortem human hippocampus from eight control, eight schizophrenia, and eight bipolar disorder subjects...
November 2, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29092889/a-statistically-oriented-asymmetric-localization-soal-model-for-neuronal-outgrowth-patterning-by-caenorhabditis-elegans-unc-5-unc5-and-unc-40-dcc-netrin-receptors
#7
Gerard Limerick, Xia Tang, Won Suk Lee, Ahmed Mohamed, Aseel Al-Aamiri, William G Wadsworth
Neurons extend processes that vary in number, length, and direction of outgrowth. Extracellular cues help determine outgrowth patterns. In Caenorhabditis elegans, neurons respond to the extracellular UNC-6 (netrin) cue via UNC-40 (DCC) and UNC-5 (UNC5) receptors. Previously we presented evidence that UNC-40 asymmetric localization at the plasma membrane is self-organizing and that UNC-40 can localize and mediate outgrowth at randomly selected sites. Here we provide further evidence for a statistically oriented asymmetric localization (SOAL) model in which UNC-5 receptor activity affects patterns of axon outgrowth by regulating UNC-40 asymmetric localization...
November 1, 2017: Genetics
https://www.readbyqxmd.com/read/29090066/lithium-chloride-can-induce-differentiation-of-human-immortalized-renvm-cells-into-dopaminergic-neurons
#8
Mitra Soleimani, Nazem Ghasemi
BACKGROUND: Stem cell-based therapy is a novel strategy for the treatment of neurodegenerative diseases. The transplantation of fully differentiated cells instead of stem cells in order to decrease serious adverse complications of stem cell therapy is a new idea. In this study, the effect of lithium chloride on dopaminergic differentiation of human immortalized RenVm cells was investigated in order to access a population of fully differentiated cells for transplantation in Parkinson disease...
October 2017: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/29079819/perturbed-wnt-signaling-leads-to-neuronal-migration-delay-altered-interhemispheric-connections-and-impaired-social-behavior
#9
Riccardo Bocchi, Kristof Egervari, Laura Carol-Perdiguer, Beatrice Viale, Charles Quairiaux, Mathias De Roo, Michael Boitard, Suzanne Oskouie, Patrick Salmon, Jozsef Z Kiss
Perturbed neuronal migration and circuit development have been implicated in the pathogenesis of neurodevelopmental diseases; however, the direct steps linking these developmental errors to behavior alterations remain unknown. Here we demonstrate that Wnt/C-Kit signaling is a key regulator of glia-guided radial migration in rat somatosensory cortex. Transient downregulation of Wnt signaling in migrating, callosal projection neurons results in delayed positioning in layer 2/3. Delayed neurons display reduced neuronal activity with impaired afferent connectivity causing permanent deficit in callosal projections...
October 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/29079753/norrin-protects-optic-nerve-axons-from-degeneration-in-a-mouse-model-of-glaucoma
#10
Stephanie A Leopold, Ludwig F Zeilbeck, Gregor Weber, Roswitha Seitz, Michael R Bösl, Herbert Jägle, Rudolf Fuchshofer, Ernst R Tamm, Andreas Ohlmann
Norrin is a secreted signaling molecule activating the Wnt/β-catenin pathway. Since Norrin protects retinal neurons from experimental acute injury, we were interested to learn if Norrin attenuates chronic damage of retinal ganglion cells (RGC) and their axons in a mouse model of glaucoma. Transgenic mice overexpressing Norrin in the retina (Pax6-Norrin) were generated and crossed with DBA/2J mice with hereditary glaucoma and optic nerve axonal degeneration. One-year old DBA/2J/Pax6-Norrin animals had significantly more surviving optic nerve axons than their DBA/2J littermates...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29058015/wnt-signaling-the-development-of-the-sympathoadrenal-paraganglionic-system-and-neuroblastoma
#11
REVIEW
Jürgen Becker, Jörg Wilting
Neuroblastoma (NB) is a tumor of the sympathoadrenal system arising in children under 15 years of age. In Germany, NB accounts for 7% of childhood cancer cases, but 11% of cancer deaths. It originates from highly migratory progenitor cells that leave the dorsal neural tube and contribute neurons and glial cells to sympathetic ganglia, and chromaffin and supportive cells to the adrenal medulla and paraganglia. Clinically, histologically and molecularly, NBs present as extremely heterogeneous, ranging from very good to very poor prognosis...
October 22, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29055813/amyloid-%C3%AE-synaptotoxicity-is-wnt-pcp-dependent-and-blocked-by-fasudil
#12
Katherine J Sellers, Christina Elliott, Joshua Jackson, Anshua Ghosh, Elena Ribe, Ana I Rojo, Heledd H Jarosz-Griffiths, Iain A Watson, Weiming Xia, Mikhail Semenov, Peter Morin, Nigel M Hooper, Rod Porter, Jane Preston, Raya Al-Shawi, George Baillie, Simon Lovestone, Antonio Cuadrado, Michael Harte, Paul Simons, Deepak P Srivastava, Richard Killick
INTRODUCTION: Synapse loss is the structural correlate of the cognitive decline indicative of dementia. In the brains of Alzheimer's disease sufferers, amyloid β (Aβ) peptides aggregate to form senile plaques but as soluble peptides are toxic to synapses. We previously demonstrated that Aβ induces Dickkopf-1 (Dkk1), which in turn activates the Wnt-planar cell polarity (Wnt-PCP) pathway to drive tau pathology and neuronal death. METHODS: We compared the effects of Aβ and of Dkk1 on synapse morphology and memory impairment while inhibiting or silencing key elements of the Wnt-PCP pathway...
October 19, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29052243/wnt-%C3%AE-catenin-signalling-pathway-mediated-aberrant-hippocampal-neurogenesis-in-kainic-acid-induced-epilepsy
#13
Zhengyi Qu, Fang Su, Xueting Qi, Jianbo Sun, Hongcai Wang, Zhenkui Qiao, Hong Zhao, Yulan Zhu
Temporal lobe epilepsy is a chronic disorder of nerve system, mainly characterized by hippocampal sclerosis with massive neuronal loss and severe gliosis. Aberrant neurogenesis has been shown in the epileptogenesis process of temporal lobe epilepsy. However, the molecular mechanisms underlying aberrant neurogenesis remain unclear. The roles of Wnt signalling cascade have been well established in neurogenesis during multiple aspects. Here, we used kainic acid-induced rat epilepsy model to investigate whether Wnt/β-catenin signalling pathway is involved in the aberrant neurogenesis in temporal lobe epilepsy...
October 19, 2017: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/29037191/ascorbic-acid-alters-cell-fate-commitment-of-human-neural-progenitors-in-a-wnt-%C3%AE-catenin-ros-signaling-dependent-manner
#14
Tareck Rharass, Margareta Lantow, Adam Gbankoto, Dieter G Weiss, Daniela Panáková, Stéphanie Lucas
BACKGROUND: Improving the neuronal yield from in vitro cultivated neural progenitor cells (NPCs) is an essential challenge in transplantation therapy in neurological disorders. In this regard, Ascorbic acid (AA) is widely used to expand neurogenesis from NPCs in cultures although the mechanisms of its action remain unclear. Neurogenesis from NPCs is regulated by the redox-sensitive WNT/β-catenin signaling pathway. We therefore aimed to investigate how AA interacts with this pathway and potentiates neurogenesis...
October 16, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/29036835/therapeutic-role-of-long-non-coding-rna-tcons_00019174-in-depressive-disorders-is-dependent-on-wnt-%C3%AE-catenin-signaling-pathway
#15
Xinqiang Ni, Yingzhao Liao, Limin Li, Xiaoli Zhang, Zhengzhi Wu
Chronic stress is one of the major causes that lead to major depressive disorder (MDD), which is a prevalent mood disorder worldwide. Lots of MDD patients could not benefit from available medication due to the complex etiology of MDD. Recently, long non-coding RNAs (lncRNAs), molecular switches of downstream genes expression, have been reported to be involved in the pathogenesis of MDD. LncRNA TCONS_00019174 has been implicated in MDD risk and antidepressant effects, However, the effect of lncRNA TCONS_00019174 on antidepressant responses has not been investigated...
October 13, 2017: Journal of Integrative Neuroscience
https://www.readbyqxmd.com/read/29033786/wnt5a-promotes-cortical-neuron-survival-by-inhibiting-cell-cycle-activation
#16
Li Zhou, Di Chen, Xu-Ming Huang, Fei Long, Hua Cai, Wen-Xia Yao, Zhong-Cheng Chen, Zhi-Jian Liao, Zhe-Zhi Deng, Sha Tan, Yi-Long Shan, Wei Cai, Yu-Ge Wang, Ri-Hong Yang, Nan Jiang, Tao Peng, Ming-Fan Hong, Zheng-Qi Lu
β-Amyloid protein (Aβ) is thought to cause neuronal loss in Alzheimer's disease (AD). Aβ treatment promotes the re-activation of a mitotic cycle and induces rapid apoptotic death of neurons. However, the signaling pathways mediating cell-cycle activation during neuron apoptosis have not been determined. We find that Wnt5a acts as a mediator of cortical neuron survival, and Aβ42 promotes cortical neuron apoptosis by downregulating the expression of Wnt5a. Cell-cycle activation is mediated by the reduced inhibitory effect of Wnt5a in Aβ42 treated cortical neurons...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29030052/primary-cilia-in-brain-development-and-diseases
#17
REVIEW
Yong H Youn, Young-Goo Han
The primary cilium, a sensory appendage that is present in most mammalian cells, plays critical roles in signaling pathways and cell cycle progression. Mutations that affect the structure or function of primary cilia result in ciliopathies, a group of developmental and degenerative diseases that affect almost all organs and tissues. Our understanding of the constituents, development, and function of primary cilia has advanced considerably in recent years, revealing pathogenic mechanisms that potentially underlie ciliopathies...
October 10, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/29029394/long-non-coding-rna-h19-induces-hippocampal-neuronal-apoptosis-via-wnt-signaling-in-a-streptozotocin-induced-rat-model-of-diabetes-mellitus
#18
Yu-Hao Zhao, Tie-Feng Ji, Qi Luo, Jin-Lu Yu
Defects in hippocampal synaptic plasticity and disorders of memory and learning are the central nervous system complications of diabetes mellitus (DM). Here, we used a streptozotocin-induced rat DM model to investigate the effects of long non-coding RNA H19 (lncRNA H19) on learning and memory and apoptosis of hippocampal neurons, and the involvement of the Wnt signaling. Our data demonstrate that lncRNA H19 is highly expressed in rats with DM. Over-expression of lncRNA H19 increased positioning navigation latency in DM rats and decreased duration of space exploration...
September 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29021340/downregulation-of-the-wnt-%C3%AE-catenin-signaling-pathway-by-cacnb4
#19
Mohamad Rima, Marwa Daghsni, Anaïs Lopez, Ziad Fajloun, Lydie Lefrancois, Mireia Dunach, Yasuo Mori, Philippe Merle, Juan L Brusés, Michel de Waard, Michel Ronjat
The β4 isoform of the β-subunits of Voltage-Gated Calcium Channel regulates cell proliferation and cell cycle progression. Herein we show that co-expression of the β4-subunit with actors of the canonical Wnt/β-catenin signaling pathway in a hepatoma cell line inhibits Wnt responsive gene transcription and decreases cell division, in agreement with the role of the Wnt pathway in cell proliferation. β4-subunit-mediated inhibition of Wnt signaling is observed in the presence of LiCl, an inhibitor of GSK3 that promotes β-catenin translocation to the nucleus...
October 11, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28993416/regulation-of-axon-guidance-by-the-wnt-receptor-ror-cam-1-in-the-pvt-guidepost-cell-in%C3%A2-caenorhabditis-elegans
#20
Jason Chien, Ranjan Devkota, Nebeyu Yosef, Catarina Mörck
The Caenorhabditis elegans ventral nerve cord (VNC) consists of two asymmetric bundles of neurons and axons that are separated by the midline. How the axons are guided to stay on the correct sides of the midline remains poorly understood. Here we provide evidence that the conserved Wnt signaling pathway along with the Netrin and Robo pathways constitute a combinatorial code for midline guidance of PVP and PVQ axons that extend into the VNC. Combined loss of the Wnts CWN-1, CWN-2 and EGL-20 or loss of the Wnt receptor CAM-1 caused more than 70 % of PVP and PVQ axons to inappropriately cross over from the left side to the right side...
October 9, 2017: Genetics
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