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https://www.readbyqxmd.com/read/29778801/injury-and-stress-responses-of-adult-neural-crest-derived-cells
#1
REVIEW
Vadims Parfejevs, Ana T Antunes, Lukas Sommer
Multipotent neural crest cells can self-renew and give rise to a plethora of neural and non-neural cell types in the vertebrate embryo. Intriguingly, cells reminiscent of such neural crest stem cells (NCSCs) have also been isolated from various postnatal and adult neural crest (NC)-derived structures. However, it has been debated whether NCSC-like cells in the adult correspond to 'in vitro artefacts' emerging upon isolation or fulfil a physiological role in vivo. Here, we discuss recent findings indicating that in different adult NC derivatives, injury or stress responses induce a NCSC-like state, presumably by reprogramming of differentiated cells such as Schwann cells...
May 17, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29775115/immunofluorescent-localization-of-non-myelinating-schwann-cells-and-their-interactions-with-immune-cells-in-mouse-thymus
#2
Dailun Hu, Philip K Nicholls, Changfu Yin, Khama Kelman, Qionglan Yuan, Wayne K Greene, Zhongli Shi, Bin Ma
The thymus is innervated by sympathetic/parasympathetic nerve fibers from the peripheral nervous system (PNS), suggesting a neural regulation of thymic function including T-cell development. Despite some published studies, data on the innervation and nerve-immune interaction inside the thymus remain limited. In the present study, we used immunofluorescent staining of glial fibrillary acidic protein (GFAP) coupled with confocal microscopy/three-dimensional (3D) reconstruction to reveal the distribution of non-myelinating Schwann cells (NMSC) and their interactions with immune cells inside mouse thymus...
May 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29772247/internode-length-is-reduced-during-myelination-and-remyelination-by-neurofilament-medium-phosphorylation-in-motor-axons
#3
Eric Villalón, Devin M Barry, Nathan Byers, Katie Frizzi, Maria R Jones, Dan S Landayan, Jeffrey M Dale, Natalie L Downer, Nigel A Calcutt, Michael L Garcia
The distance between nodes of Ranvier, referred to as internode length, positively correlates with axon diameter, and is optimized during development to ensure maximal neuronal conduction velocity. Following myelin loss, internode length is reestablished through remyelination. However, remyelination results in short internode lengths and reduced conduction rates. We analyzed the potential role of neurofilament phosphorylation in regulating internode length during remyelination and myelination. Following ethidium bromide induced demyelination, levels of neurofilament medium (NF-M) and heavy (NF-H) phosphorylation were unaffected...
May 14, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29771329/regulation-of-the-neuropathy-associated-pmp22-gene-by-a-distal-super-enhancer
#4
Harrison Pantera, John J Moran, Holly A Hung, Evgenia Pak, Amalia Dutra, John Svaren
Peripheral nerve myelination is adversely affected in the most common form of the hereditary peripheral neuropathy called Charcot-Marie-Tooth Disease. This form, classified as CMT1A, is caused by a 1.4 Mb duplication on chromosome 17, which includes the abundantly expressed Schwann cell myelin gene, Peripheral Myelin Protein 22 (PMP22). This is one of the most common copy number variants causing neurological disease. Overexpression of Pmp22 in rodent models recapitulates several aspects of neuropathy, and reduction of Pmp22 in such models results in amelioration of the neuropathy phenotype...
May 16, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29770116/peripheral-glial-cells-in-the-development-of-diabetic-neuropathy
#5
REVIEW
Nádia Pereira Gonçalves, Christian Bjerggaard Vægter, Lone Tjener Pallesen
The global prevalence of diabetes is rapidly increasing, affecting more than half a billion individuals within the next few years. As diabetes negatively affects several physiological systems, this dramatic increase represents not only impaired quality of life on the individual level but also a huge socioeconomic challenge. One of the physiological consequences affecting up to half of diabetic patients is the progressive deterioration of the peripheral nervous system, resulting in spontaneous pain and eventually loss of sensory function, motor weakness, and organ dysfunctions...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29768188/micropatterned-biodegradable-polyesters-clicked-with-cqaasikvav-promote-cell-alignment-directional-migration-and-neurite-outgrowth
#6
Deteng Zhang, Sai Wu, Jianyong Feng, Yiyuan Duan, Dongming Xing, Changyou Gao
The interplay of microstructures and biological cues is critical to regulate the behaviors of Schwann cells (SCs) in terms of cellular spatial arrangement and directional migration as well as neurite orientation for bridging the proximal and distal stumps of the injured peripheral nervous system. In this study, stripe micropatterns having ridges/grooves of width 20/20 and 20/40 μm were fabricated on the surface of maleimide-functionalized biodegradable poly(ester carbonate) (P(LLA-MTMC)) films by the polydimethylsiloxane mold-pressing method, respectively...
May 13, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29766020/amelioration-of-muscle-and-nerve-pathology-in-lama2-muscular-dystrophy-by-aav9-mini-agrin
#7
Chunping Qiao, Yi Dai, Viktoriya D Nikolova, Quan Jin, Jianbin Li, Bin Xiao, Juan Li, Sheryl S Moy, Xiao Xiao
LAMA2-related muscular dystrophy (LAMA2 MD) is the most common and fatal form of early-onset congenital muscular dystrophies. Due to the large size of the laminin α2 cDNA and heterotrimeric structure of the protein, it is challenging to develop a gene-replacement therapy. Our group has developed a novel adeno-associated viral (AAV) vector carrying the mini-agrin, which is a non-homologous functional substitute for the mutated laminin α2. A significant therapeutic effect in skeletal muscle was observed in our previous study using AAV serotype 1 (AAV1)...
June 15, 2018: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/29764009/a-rare-duodenal-subepithelial-tumor-duodenal-schwannoma
#8
Dong Hwahn Kahng, Gwang Ha Kim, Sang Gyu Park, So Jeong Lee, Do Youn Park
Schwannomas are uncommon neoplasms that arise from Schwann cells of the neural sheath. Gastrointestinal schwannomas are rare among mesenchymal tumors of the gastrointestinal tract, and only a few cases have been reported to date. Duodenal schwannomas are usually discovered incidentally and achieving a preoperative diagnosis is difficult. Schwannomas can be distinguished from other subepithelial tumors on endoscopic ultrasonography; however, any typical endosonographic features of duodenal schwannomas have not been reported due to the rarity of these tumors...
May 15, 2018: Clinical Endoscopy
https://www.readbyqxmd.com/read/29761119/antibodies-against-cell-adhesion-molecules-and-neural-structures-in-paraneoplastic-neuropathies
#9
Ana M Siles, Eugenia Martínez-Hernández, Josefa Araque, Jordi Diaz-Manera, Ricard Rojas-Garcia, Eduard Gallardo, Isabel Illa, Francesc Graus, Luis Querol
Objective: Paraneoplastic neurological syndromes (PNS) are rare neurological disorders in which ectopic expression of neural antigens by a tumor results in an autoimmune attack against the nervous system. Onconeural antibodies not only guide PNS diagnosis but may also help detecting underlying malignancies. Our project aims to uncover new potential antibodies in paraneoplastic neuropathies (PN). Methods: Thirty-four patients fulfilling diagnostic criteria of possible ( n = 9; 26...
May 2018: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/29756618/intraparotid-facial-nerve-schwannoma-two-case-reports-and-a-review-of-the-literature
#10
M Simone, E Vesperini, C Viti, A Camaioni, L Lepanto, F Raso
Schwannomas are rare benign tumours that arise from Schwann cells. The most known and studied is the intracranial vestibular schwannoma, even if it is not the most frequent. More often schwannomas arise from peripheral sensitive nerves, and the vagous is most involved among the cranial nerves. Intraparotid schwannomas account for just 10% of all facial involvement, so they are an extremely rare localisation. At present, there are less than 100 cases described in the literature. We performed a retrospective analysis of parotidectomy in two Italian hospitals and present two cases of intraparotid schwannoma and a review of the literature...
February 2018: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29753078/isolated-pediatric-intramedullary-schwannoma-case-report-and-review-of-the-literature
#11
Alessandro Landi, Giovanni Grasso, Fabrizio Gregori, Giorgia Iacopino, Andrea Ruggeri, Roberto Delfini
BACKGROUND: Intramedullary (IM) schwannomas are rare entities representing the 0.3-1% of intramedullary tumors and 1.1% of spinal schwannomas. Beside many theories proposed, their rare occurrence might be related to the absence of Schwann cells into the spinal cord. Pediatric IM schwannomas are uncommon and in absence of neurofibromatosis (NF) they are extremely rare. To date, very few cases have been reported in the literature. CASE DESCRIPTION: We describe the case of a 8 year-old female affected by a progressive paraparesis...
May 9, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29751848/differentiation-of-adipose-derived-stem-cells-into-schwann-cell-like-cells-through-intermittent-induction-potential-advantage-of-cellular-transient-memory-function
#12
Xun Sun, Yun Zhu, He-Yong Yin, Zhi-Yuan Guo, Feng Xu, Bo Xiao, Wen-Li Jiang, Wei-Min Guo, Hao-Ye Meng, Shi-Bi Lu, Yu Wang, Jiang Peng
BACKGROUND: Peripheral nerve injury (PNI) is a worldwide issue associated with severe social and economic burden. Autologous nerve grafting, the gold standard treatment for peripheral nerve defects, still has a number of technical limitations. Tissue engineering technology is a novel therapeutic strategy, and mesenchymal stromal cells (MSCs) are promising seed cells for nerve tissue engineering. However, the efficiency of traditional methods for inducing the differentiation of MSCs to Schwann cell-like cells (SCLCs) remains unsatisfactory...
May 11, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29748249/maf-links-neuregulin1-signaling-to-cholesterol-synthesis-in-myelinating-schwann-cells
#13
Minchul Kim, Hagen Wende, Jan Walcher, Johannes Küehnemund, Cyril Cheret, Stefan Kempa, Erik McShane, Matthias Selbach, Gary R Lewin, Carmen Birchmeier
Cholesterol is a major constituent of myelin membranes, which insulate axons and allow saltatory conduction. Therefore, Schwann cells, the myelinating glia of the peripheral nervous system, need to produce large amounts of cholesterol. Here, we define a crucial role of the transcription factor Maf in myelination and cholesterol biosynthesis and show that Maf acts downstream from Neuregulin1 (Nrg1). Maf expression is induced when Schwann cells begin myelination. Genetic ablation of Maf resulted in hypomyelination that resembled mice with defective Nrg1 signaling...
May 10, 2018: Genes & Development
https://www.readbyqxmd.com/read/29746890/use-of-a-capillary-alginate-gel-capgel%C3%A2-to-study-the-three-dimensional-development-of-sensory-nerves-reveals-the-formation-of-a-rudimentary-perineurium
#14
Wesley A Anderson, Alicia R Willenberg, Alexander J Bosak, Bradley J Willenberg, Stephen Lambert
BACKGROUND: Peripheral neuropathies affect approximately 20 million people in the United States and often stem from other chronic conditions, such as diabetes. In vitro methodologies to facilitate the understanding and treatment of these disorders often lack the cellular and functional complexity required to accurately model peripheral neuropathies. In particular, they are often 2D and fail to faithfully reproduce the 3D in vivo microenvironment. NEW METHOD: Embryonic dorsal root ganglion (DRG) explants were inserted into laminin derivatized capillary alginate gel (Capgel™), a bioabsorbable, self-assembling biomaterial, possessing parallel microchannel architecture, and cultured to mimic normal nerve development, including Schwann cell myelination...
May 7, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29742816/angiostrongylus-cantonensis-conditioned-culture-medium-induces-myelin-basic-protein-alterations-via-erk1-2-and-nf-%C3%AE%C2%BAb-activation-in-rat-rsc-96-schwann-cells
#15
Jo-Ping Chin, Chien-Min Chen, Tsong-Hai Lee, Chii-Wen Chou, Cheng-You Lu
Eating of excessive raw or undercooked environmental snails produces Angiostrongyliasis demyelination caused by Angiostrongylus cantonensis. The aim of this study was to investigate the association between extracellular signal-regulated kinase (Erk)1/2-nuclear factor (NF)-κB pathway and myelin basic protein (MBP) expression in RSC 96 Schwann cells treated with A. cantonensis- conditioned culture medium, which was prepared by culturing the third-stage (L3) nematode larvae in DMEM for 72 h. The supernatants were collected and filtered before use...
May 10, 2018: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/29742699/effect-of-photobiomodulation-treatment-in-the-sublingual-radial-artery-region-and-along-the-spinal-column-in-individuals-with-multiple-sclerosis-protocol-for-a-randomized-controlled-double-blind-clinical-trial
#16
RANDOMIZED CONTROLLED TRIAL
Tamiris da Silva, Fernanda Cordeiro da Silva, Andréa Oliver Gomes, Ariane Oliveira Viana, Marcela Letícia Leal Gonçalves, Maria Fernanda Setúbal Destro Rodrigues, Anna Carolina Ratto Tempestini Horliana, Daniela de Fátima Teixeira da Silva, Maria Cristina Chavantes, Yara Dadalti Fragoso, Luciana Prats Branco, Lara Jansiski Motta, Kristianne Porta Santos Fernandes, Raquel Agnelli Mesquita-Ferrari, Sandra Kalil Bussadori
BACKGROUND: Multiple sclerosis (MS) is an autoimmune disease, for which the forms of treatment are medication and rehabilitation. However, in vitro and in vivo studies have demonstrated that photobiomodulation can be an effective treatment modality for inflammatory diseases, including MS. Photobiomodulation has a broad range of benefits, such as the avoidance of cell and tissue death, the stimulation of healing and injury repair, reductions in pain, edema and inflammation, cell proliferation, and even apoptosis...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29742495/progressive-degeneration-and-inhibition-of-peripheral-nerve-regeneration-in-the-sod1-g93a-mouse-model-of-amyotrophic-lateral-sclerosis
#17
Binbin Deng, Wenjing Lv, Weisong Duan, Yakun Liu, Zhongyao Li, Yanqin Ma, Guisen Zhang, Xueqin Song, Can Cui, Xiaoming Qi, Yuan Li, Chunyan Li
BACKGROUND: Myelination, degeneration and regeneration are implicated in crucial responses to injury in the peripheral nervous system. Considering the progression of amyotrophic lateral sclerosis (ALS), we used the superoxide dismutase 1 (SOD1)-G93A transgenic mouse model of ALS to investigate the effects of mutant SOD1 on the peripheral nerves. METHODS: Changes in peripheral nerve morphology were analyzed in SOD1 mutant mice at various stages of the disease by toluidine blue staining and electron microscopy (EM)...
May 4, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29740613/big1-arfgef1-and-arf1-regulate-the-initiation-of-myelination-by-schwann-cells-in-mice
#18
Yuki Miyamoto, Tomohiro Torii, Kenji Tago, Akito Tanoue, Shou Takashima, Junji Yamauchi
During development of the peripheral nervous system in mammals, Schwann cells wrap their plasma membranes around neuronal axons, forming multiple myelin sheaths. A mature myelin sheath insulates axons and increases nerve conduction velocity while protecting nerve fibers from various stresses such as physical ones. Despite this functional importance, the molecular units that underlie dynamic morphological changes in formation of myelin sheaths are not sufficiently understood. Arf1 is a small guanosine triphosphate-binding protein that plays multiple roles in intracellular trafficking and related signaling, both of which are processes involved in cell morphogenesis...
April 2018: Science Advances
https://www.readbyqxmd.com/read/29740279/activation-of-neuregulin-1-erbb-signaling-is-involved-in-the-development-of-tocp-induced-delayed-neuropathy
#19
Hai-Yang Xu, Pan Wang, Ying-Jian Sun, Ming-Yuan Xu, Li Zhu, Yi-Jun Wu
Organophosphate-induced delayed neuropathy (OPIDN) is characterized by progressive axonal degeneration and demyelination of the spinal cord and sciatic nerves. The neuregulin 1/epidermal growth factor receptor (ErbB) signaling pathway is crucial for axonal myelination. In this study, we investigated whether the neuregulin 1/ErbB signaling pathway mediated the progression of OPIDN. Adult hens were given tri- o -cresyl phosphate (TOCP), a typical neuropathic organophosphorus compound, to induce OPIDN. The ErbB inhibitor lapatinib was administered to hens 4 h prior to and 4 days after TOCP exposure...
2018: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29738063/-a-rare-cause-of-forearm-pain-schwannoma-of-the-posterior-interosseous-nerve
#20
Rana Terlemez, Deniz Palamar, Beril Doğu, Figen Yılmaz, Banu Kuran
A schwannoma, also known as a neurilemoma, is composed of Schwann cells, and is the most common benign tumor of the peripheral nerves. It commonly appears as a solitary lesion in the head and neck region. The diagnosis is based on ultrasonography, magnetic resonance imaging, and histopathological examination. This encapsulated tumor has a good prognosis with a low recurrence rate after surgical removal. This case report is a description of a forearm schwannoma that initially appeared to be a ganglion cyst.
April 2018: Aǧrı: Ağrı (Algoloji) Derneği'nin Yayın Organıdır, the Journal of the Turkish Society of Algology
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