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Journal of Molecular Neuroscience: MN

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https://www.readbyqxmd.com/read/28210980/molecular-mechanisms-of-ire1%C3%AE-ask1-pathway-reactions-to-unfolded-protein-response-in-drn-neurons-of-post-traumatic-stress-disorder-rats
#1
Fanzhen Kong, Fang Han, Yanhao Xu, Yuxiu Shi
The goal of this study was to further elucidate the molecular mechanisms of post-traumatic stress disorder (PTSD) pathogenesis and to provide experimental evidence for new drug targets for effective PTSD treatment. Expression changes of IRE1α, ASK1, and other downstream molecules of the IRE1α-ASK1 endoplasmic reticulum stress (ERS) signaling pathway were investigated. JNK, P38, CHOP, Bcl-2, and Bax were analyzed at both protein and mRNA levels of dorsal raphe nucleus (DRN) neurons of PTSD rats. The rat PTSD model was established via the single-prolonged stress (SPS) method...
February 16, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28181149/genome-wide-sequencing-reveals-micrornas-downregulated-in-cerebral-cavernous-malformations
#2
Souvik Kar, Kiran Kumar Bali, Arpita Baisantry, Robert Geffers, Amir Samii, Helmut Bertalanffy
Cerebral cavernous malformations (CCM) are vascular lesions associated with loss-of-function mutations in one of the three genes encoding KRIT1 (CCM1), CCM2, and PDCD10. Recent understanding of the molecular mechanisms that lead to CCM development is limited. The role of microRNAs (miRNAs) has been demonstrated in vascular pathologies resulting in loss of tight junction proteins, increased vascular permeability and endothelial cell dysfunction. Since the relevance of miRNAs in CCM pathophysiology has not been elucidated, the primary aim of the study was to identify the miRNA-mRNA expression network associated with CCM...
February 8, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28176147/antagonism-of-dopamine-d2-receptors-alters-phosphorylation-of-fyn-in-the-rat-medial-prefrontal-cortex
#3
Li-Min Mao, John Q Wang
Several Src family kinase (SFK) members are expressed in the mammalian brain and serve as key kinases in the regulation of a variety of cellular and synaptic events. These SFKs may be subject to the modulation by dopamine, although this topic has been investigated incompletely. In this study, we explored whether dopamine D2 receptors (D2Rs) regulate SFKs in adult rat brains in vivo. We investigated the role of D2Rs in two forebrain areas, the medial prefrontal cortex (mPFC) and hippocampus, since dopamine plays a pivotal role in regulating activity of mPFC and hippocampal neurons and D2Rs are expressed in these regions...
February 7, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28168414/the-anti-aging-effect-of-erythropoietin-via-the-erk-nrf2-are-pathway-in-aging-rats
#4
Haiqin Wu, Jiaxin Zhao, Mengyi Chen, Huqing Wang, Qingling Yao, Jiaxin Fan, Meng Zhang
Erythropoietin (EPO) has a neuroprotective effect and can resist aging, which most likely occur through EPO increasing the activity of antioxidant enzymes and scavenging free radicals. In this study, we verified the anti-aging function of EPO and discussed the mechanism occurring through the extracellular signal-regulated kinase (ERK)/NF-E2-related factor 2 (Nrf2)-ARE pathway. A rat model of aging was induced by the continuous subcutaneous injection of 5 % D-galactose for 6 weeks. At the beginning of the sixth week, physiological saline or EPO was administered twice per day through a lateral ventricle system for a total of 7 days...
February 6, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28168413/early-neurobehavioral-development-of-mice-lacking-endogenous-pacap
#5
Jozsef Farkas, Balazs Sandor, Andrea Tamas, Peter Kiss, Hitoshi Hashimoto, Andras D Nagy, Balazs D Fulop, Tamas Juhasz, Sridharan Manavalan, Dora Reglodi
Pituitary adenylate cyclase activating polypeptide (PACAP) is a multifunctional neuropeptide. In addition to its diverse physiological roles, PACAP has important functions in the embryonic development of various tissues, and it is also considered as a trophic factor during development and in the case of neuronal injuries. Data suggest that the development of the nervous system is severely affected by the lack of endogenous PACAP. Short-term neurofunctional outcome correlates with long-term functional deficits; however, the early neurobehavioral development of PACAP-deficient mice has not yet been evaluated...
February 6, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28160210/a-novel-krit1-ccm1-gene-insertion-mutation-associated-with-cerebral-cavernous-malformations-in-a-chinese-family
#6
Hui Wang, Yunzhu Pan, Zaiqiang Zhang, Xingang Li, Zhe Xu, Yue Suo, Wei Li, Yongjun Wang
Familial cerebral cavernous malformation (FCCM) is a vascular malformation disorder that closely associated with three identified genes: KRIT1/CCM1, MGC4607/CCM2, and PDCD10/CCM3. Here, we present a Chinese family affected by FCCM due to a novel KRIT1/CCM1 insertion mutation. The proband was hospitalized for sudden unconsciousness and underwent surgical treatment. The section of lesions showed classical cavernous-dilated vessels without intervening brain parenchyma, and hemosiderin-laden macrophages were accumulated in the surrounding tissue...
February 3, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28150190/estrogen-modulates-ubc9-expression-and-synaptic-redistribution-in-the-brain-of-app-ps1-mice-and-cortical-neurons
#7
Yu-Jie Lai, Lu Liu, Xiao-Tong Hu, Ling He, Guo-Jun Chen
Estrogen exerts multiple actions in the brain and is an important neuroprotective factor in a number of neuronal disorders. However, the underlying mechanism remains unknown. Studies demonstrate that ubiquitin-conjugating enzyme 9 (ubc9) has an integral role in synaptic plasticity and may contribute to the pathology of neuronal disorders. We aimed to investigate the effects of estrogen on ubc9 and in the Alzheimer's disease brain. Ubc9 protein and mRNA were significantly increased in the cortex and hippocampus of APP/PS1 mice with enhanced SUMOylation...
February 1, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28144826/neuroprotective-effects-and-mechanisms-of-action-of-multifunctional-agents-targeting-free-radicals-monoamine-oxidase-b-and-cholinesterase-in-parkinson-s-disease-model
#8
Zheng Liu, Wei Cai, Ming Lang, Ruizuo Yan, Zhenshen Li, Gaoxiao Zhang, Pei Yu, Yuqiang Wang, Yewei Sun, Zaijun Zhang
Parkinson's disease (PD) is a complex neurodegenerative disorder with multifactorial pathologies, including progressive loss of dopaminergic (DA) neurons, oxidative stress, mitochondrial dysfunction, and increased monoamine oxidase (MAO) enzyme activity. There are currently only a few agents approved to ameliorate the symptoms of PD; however, no agent is able to reverse the progression of the disease. Due to the multifactorial pathologies, it is necessary to develop multifunctional agents that can affect more than one target involved in the disease pathology...
January 31, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28124770/the-effect-of-stereotactic-injections-on-demyelination-and-remyelination-a-study-in-the-cuprizone-model
#9
Laura Salinas Tejedor, Tanja Wostradowski, Stefan Gingele, Thomas Skripuletz, Viktoria Gudi, Martin Stangel
Remyelination is the natural repair mechanism in demyelinating disorders of the central nervous system (CNS) such as multiple sclerosis. Several animal models have been used to study demyelination and remyelination. Among toxic animal models, oral administration of the toxin cuprizone leads to white and gray matter demyelination. In contrast, focal demyelination models include the stereotactic application of a toxin such as lysolecithin or ethidium bromide. The injection procedure generates a local disruption of the blood-brain barrier (BBB) and might thus trigger a local inflammatory reaction and consequently may influence demyelination and remyelination...
January 26, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28124230/study-on-lentivirus-mediated-abca7-improves-neurocognitive-function-and-related-mechanisms-in-the-c57bl-6-mouse-model-of-alzheimer-s-disease
#10
Mengqian Li, Yefeng Yuan, Bo Hu, Lei Wu
ATP-binding cassette transporter A7 (ABCA7) is expressed in the hippocampus and cortex of the brain and was confirmed to be involved in the development of Alzheimer's disease (AD). Previous studies have demonstrated that ABCA7 regulated Aβ production, lipid transport, leading to AD characteristic pathological changes. However, the role and mechanism of ABCA7 in the context of AD needs further research. We augmented the expression of ABCA7 using lentiviral vector carrying ABCA7 gene to investigate the effect of ABCA7 overexpression on AD mice; then, we further explored the underlying mechanism in vitro...
January 26, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28105535/the-neuropeptide-orexin-a-inhibits-the-gabaa-receptor-by-pkc-and-ca-2-camkii-dependent-phosphorylation-of-its-%C3%AE-1-subunit
#11
Divya Sachidanandan, Haritha P Reddy, Anitha Mani, Geoffrey J Hyde, Amal Kanti Bera
Orexin-A and orexin-B (Ox-A, Ox-B) are neuropeptides produced by a small number of neurons that originate in the hypothalamus and project widely in the brain. Only discovered in 1998, the orexins are already known to regulate several behaviours. Most prominently, they help to stabilise the waking state, a role with demonstrated significance in the clinical management of narcolepsy and insomnia. Orexins bind to G-protein-coupled receptors (predominantly postsynaptic) of two subtypes, OX1R and OX2R. The primary effect of Ox-OXR binding is a direct depolarising influence mediated by cell membrane cation channels, but a wide variety of secondary effects, both pre- and postsynaptic, are also emerging...
January 19, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28097492/activation-of-trpm2-and-trpv1-channels-in-dorsal-root-ganglion-by-nadph-oxidase-and-protein-kinase-c-molecular-pathways-a-patch-clamp-study
#12
Mustafa Nazıroğlu
Despite considerable research, the mechanisms of neuropathic pain induced by excessive oxidative stress production and overload calcium ion (Ca(2+)) entry in dorsal root ganglion (DRG) remain substantially unidentified. The transient receptor potential melastatin 2 (TRPM2) and vanilloid 1 (TRPV1) channels are activated with different stimuli including oxidative stress. TRPM2 and TRPV1 have been shown to be involved in induction of neuropathic pain. However, the activation mechanisms of TRPM2 and TRPV1 via NADPH oxidase and protein kinase C (PKC) pathways are poorly understood...
January 17, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28097491/small-interfering-rna-targeting-dickkopf-1-contributes-to-neuroprotection-after-intracerebral-hemorrhage-in-rats
#13
Zhihua Li, Xi Chen, Xiaoyang Zhang, Xiuhua Ren, Xuemei Chen, Jing Cao, Weidong Zang, Xianzhi Liu, Fuyou Guo
Excessive Dickkopf-1 (Dkk-1) plays a vital role in secondary brain injury following ischemic stroke and psychotic disease. However, it is unclear whether an increased expression of Dkk-1 occurred after intracerebral hemorrhage (ICH). The present study examined the potential role of Dkk-1 after ICH. ICH was induced by a single injection of autologous blood into the basal ganglia of rats. Dkk-1 protein levels in brain tissue and serum were detected by enzyme-linked immunosorbent assay after ICH. Rats were treated with small interfering RNA targeting Dkk-1 (siDkk-1) or vehicle following ICH...
January 17, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28054226/picroside-ii-exerts-a-neuroprotective-effect-by-inhibiting-the-mitochondria-cytochrome-c-signal-pathway-following-ischemia-reperfusion-injury-in-rats
#14
Hongyan Zhang, Li Zhai, Tingting Wang, Shan Li, Yunliang Guo
Stroke is a common neurodegenerative disease in the wide world, and mitochondrial defects underlie the pathogenesis of ischemia, especially during reperfusion. Picroside II, the principal active component of Picrorhiza, is a traditional Chinese medicine. Our previous study demonstrated that the best therapeutic dose and time window were injection of picroside II at a dose of 10-20 mg/kg body weight following cerebral ischemia by 1.5-2.0 h. In this paper, the neuroprotective effect and the mechanism of picroside II were investigated, as well as its involvement in antioxidant and mitochondria cytochrome C (CytC) signal pathway following ischemia reperfusion (I/R) injury in rats...
January 4, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28035555/erratum-to-17%C3%AE-estradiol-induced-synaptic-rearrangements-are-accompanied-by-altered-ectonucleotidase-activities-in-male-rat-hippocampal-synaptosomes
#15
Nataša Mitrović, Marina Zarić, Dunja Drakulić, Jelena Martinović, Jean Sévigny, Miloš Stanojlović, Nadežda Nedeljković, Ivana Grković
No abstract text is available yet for this article.
December 29, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28025777/brain-development-and-akt-signaling-the-crossroads-of-signaling-pathway-and-neurodevelopmental-diseases
#16
REVIEW
Long Wang, Kai Zhou, Zhi Fu, Di Yu, Hesuyuan Huang, Xiaodong Zang, Xuming Mo
Neurodevelopmental biology, coupled with the application of advanced histological, imaging, molecular, cellular, biochemical, and genetic approaches, has provided new insights into these intricate genetic, cellular, and molecular events. During telencephalic development, specific neural progenitor cells (NPCs) proliferate, differentiate into numerous cell types, migrate to their apposite positions, and form an integrated circuitry. Critical disturbance to this dynamic process via genetic and environmental risk can cause neurological disorders and disability...
December 26, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28012097/mirna-expression-change-in-dorsal-root-ganglia-after-peripheral-nerve-injury
#17
Hsueh-Ling Chang, Hung-Chen Wang, Yi-Ta Chunag, Chao-Wen Chou, I-Ling Lin, Chung-Sheng Lai, Lin-Li Chang, Kuang-I Cheng
The role of microRNAs (miRNAs) in the regulation of nerve injury-induced neuropathic pain is unclear. The aims of this study were to assess and compare miRNA expression profiles in dorsal root ganglia (DRG) following three different kinds of peripheral nerve injury, including spinal nerve ligation (SNL), dorsal root transection (DRT), and ventral root transection (VRT), in Sprague-Dawley rats. Responses to thermal and mechanical stimuli were measured preoperatively and on postoperative days (PODs) 1, 4, and 7...
December 24, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28012096/a-sodium-channel-myotonia-presenting-with-intermittent-dysphagia-as-a-manifestation-of-a-rare-scn4a-variant
#18
Jihane N Benhammou, Jennifer Phan, Hane Lee, Kevin Ghassemi, William Parsons, Wayne W Grody, Joseph R Pisegna
The voltage gated sodium channel SCN4A mutations account for non-dystrophic myotonia and include a heterogeneous group of conditions that include hyperkalemic periodic paralysis, paramyotonica congenita, potassium-aggravated myotonia, and hypokalemic periodic paralysis type 2. This case report proposes that a rare variant p.Pro1629Leu in SCN4A can cause a skeletal muscle deficit with intermittent dysphagia.
December 23, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28000143/update-on-novel-ccm-gene-mutations-in-patients-with-cerebral-cavernous-malformations
#19
Concetta Scimone, Placido Bramanti, Concetta Alafaci, Francesca Granata, Francesco Piva, Carmela Rinaldi, Luigi Donato, Federica Greco, Antonina Sidoti, Rosalia D'Angelo
Cerebral cavernous malformations (CCMs) are lesions affecting brain microvessels. The pathogenesis is not clearly understood. Conventional classification criterion is based on genetics, and thus, familial and sporadic forms can be distinguished; however, classification of sporadic cases with multiple lesions still remains uncertain. To date, three CCM causative genes have been identified: CCM1/KRIT1, CCM2/MGC4607 and CCM3/PDCD10. In our previous mutation screening, performed in a cohort of 95 Italian patients, with both sporadic and familial cases, we identified several mutations in CCM genes...
December 20, 2016: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/27981419/the-novel-membrane-bound-proteins-mfsd1-and-mfsd3-are-putative-slc-transporters-affected-by-altered-nutrient-intake
#20
Emelie Perland, Sofie V Hellsten, Emilia Lekholm, Mikaela M Eriksson, Vasiliki Arapi, Robert Fredriksson
Membrane-bound solute carriers (SLCs) are essential as they maintain several physiological functions, such as nutrient uptake, ion transport and waste removal. The SLC family comprise about 400 transporters, and we have identified two new putative family members, major facilitator superfamily domain containing 1 (MFSD1) and 3 (MFSD3). They cluster phylogenetically with SLCs of MFS type, and both proteins are conserved in chordates, while MFSD1 is also found in fruit fly. Based on homology modelling, we predict 12 transmembrane regions, a common feature for MFS transporters...
December 16, 2016: Journal of Molecular Neuroscience: MN
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