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https://www.readbyqxmd.com/read/28207737/the-enteric-nervous-system-promotes-intestinal-health-by-constraining-microbiota-composition
#1
Annah S Rolig, Erika K Mittge, Julia Ganz, Josh V Troll, Ellie Melancon, Travis J Wiles, Kristin Alligood, W Zac Stephens, Judith S Eisen, Karen Guillemin
Sustaining a balanced intestinal microbial community is critical for maintaining intestinal health and preventing chronic inflammation. The gut is a highly dynamic environment, subject to periodic waves of peristaltic activity. We hypothesized that this dynamic environment is a prerequisite for a balanced microbial community and that the enteric nervous system (ENS), a chief regulator of physiological processes within the gut, profoundly influences gut microbiota composition. We found that zebrafish lacking an ENS due to a mutation in the Hirschsprung disease gene, sox10, develop microbiota-dependent inflammation that is transmissible between hosts...
February 2017: PLoS Biology
https://www.readbyqxmd.com/read/28186702/direct-conversion-of-human-fibroblasts-into-schwann-cells-that-facilitate-regeneration-of-injured-peripheral-nerve-in-vivo
#2
Yoshihiro Sowa, Tsunao Kishida, Koichi Tomita, Kenta Yamamoto, Toshiaki Numajiri, Osam Mazda
Schwann cells (SCs) play pivotal roles in the maintenance and regeneration of the peripheral nervous system. Although transplantation of SCs enhances repair of experimentally damaged peripheral and central nerve tissues, it is difficult to prepare a sufficient number of functional SCs for transplantation therapy without causing adverse events for the donor. Here, we generated functional SCs by somatic cell reprogramming procedures and demonstrated their capability to promote peripheral nerve regeneration. Normal human fibroblasts were phenotypically converted into SCs by transducing SOX10 and Krox20 genes followed by culturing for 10 days resulting in approximately 43% directly converted Schwann cells (dSCs)...
January 9, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28177135/unveiling-and-initial-characterization-of-neural-crest-like-cells-in-mesenchymal-populations-from-the-human-periodontal-ligament
#3
L Ramírez-García, R Cevallos, K Gazarian
OBJECTIVE: To identify cells with neural crest properties in mesenchymal populations isolated from human periodontal ligament. BACKGROUND: Evidence from tracing experiments on animal embryos revealed proof that dental tissues are among the homing sites of craniofacial neural crest migratory cells. In humans, similar migratory cells were found in early embryos, but whether these cells are progeny of oral multipotent stem cells needs to be confirmed. Searching for the cells with neural crest characteristics in periodontal ligament mesenchymal populations can lead to a solution to the problem...
February 8, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28169300/two-factor-based-reprogramming-of-rodent-and-human-fibroblasts-into-schwann-cells
#4
Pietro Giuseppe Mazzara, Luca Massimino, Marta Pellegatta, Giulia Ronchi, Alessandra Ricca, Angelo Iannielli, Serena Gea Giannelli, Marco Cursi, Cinzia Cancellieri, Alessandro Sessa, Ubaldo Del Carro, Angelo Quattrini, Stefano Geuna, Angela Gritti, Carla Taveggia, Vania Broccoli
Schwann cells (SCs) generate the myelin wrapping of peripheral nerve axons and are promising candidates for cell therapy. However, to date a renewable source of SCs is lacking. In this study, we show the conversion of skin fibroblasts into induced Schwann cells (iSCs) by driving the expression of two transcription factors, Sox10 and Egr2. iSCs resembled primary SCs in global gene expression profiling and PNS identity. In vitro, iSCs wrapped axons generating compact myelin sheaths with regular nodal structures...
February 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28153506/clinicopathologic-study-of-calcifying-fibrous-tumor-of-the-gastrointestinal-tract-a-case-series
#5
Maryam Kherad Pezhouh, M Katayoon Rezaei, Maryam Shabihkhani, Arunima Ghosh, Deborah Belchis, Elizabeth A Montgomery, Lysandra Voltaggio
Calcifying fibrous tumor (CFT) is a rare benign mesenchymal lesion known to arise at multiple body sites that may clinically mimic other more aggressive lesions in the gastrointestinal (GI) tract. In this study we describe the clinicopathologic findings of 28 GI tract CFTs. Tumors predominantly arose in middle aged adults with a slight female predominance. The most commonly involved sites were small bowel and colon, followed by stomach and appendix. Tumors ranged from 0.3 to 9.3cm (median 1.4cm) and submucosa was the most commonly involved layer...
January 30, 2017: Human Pathology
https://www.readbyqxmd.com/read/28128317/a-de-novo-deletion-mutation-in-sox10-in-a-chinese-family-with-waardenburg-syndrome-type-4
#6
Xiong Wang, Yaowu Zhu, Na Shen, Jing Peng, Chunyu Wang, Haiyi Liu, Yanjun Lu
Waardenburg syndrome type 4 (WS4) or Waardenburg-Shah syndrome is a rare genetic disorder with a prevalence of <1/1,000,000 and characterized by the association of congenital sensorineural hearing loss, pigmentary abnormalities, and intestinal aganglionosis. There are three types of WS4 (WS4A-C) caused by mutations in endothelin receptor type B, endothelin 3, and SRY-box 10 (SOX10), respectively. This study investigated a genetic mutation in a Chinese family with one WS4 patient in order to improve genetic counselling...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28125654/human-deciduous-teeth-stem-cells-shed-display-neural-crest-signature-characters
#7
Karlen G Gazarian, Luis R Ramírez-García
Human dental tissues are sources of neural crest origin multipotent stem cells whose regenerative potential is a focus of extensive studies. Rational programming of clinical applications requires a more detailed knowledge of the characters inherited from neural crest. Investigation of neural crest cells generated from human pluripotent stem cells provided opportunity for their comparison with the postnatal dental cells. The purpose of this study was to investigate the role of the culture conditions in the expression by dental cells of neural crest characters...
2017: PloS One
https://www.readbyqxmd.com/read/28118374/dynamic-expression-of-sox2-gata3-and-prox1-during-primary-auditory-neuron-development-in-the-mammalian-cochlea
#8
Koji Nishimura, Teppei Noda, Alain Dabdoub
Primary auditory neurons (PANs) connect cochlear sensory hair cells in the mammalian inner ear to cochlear nucleus neurons in the brainstem. PANs develop from neuroblasts delaminated from the proneurosensory domain of the otocyst and keep maturing until the onset of hearing after birth. There are two types of PANs: type I, which innervate the inner hair cells (IHCs), and type II, which innervate the outer hair cells (OHCs). Glial cells surrounding these neurons originate from neural crest cells and migrate to the spiral ganglion...
2017: PloS One
https://www.readbyqxmd.com/read/28107504/sox10-nano-lantern-reporter-human-ips-cells-a-versatile-tool-for-neural-crest-research
#9
Tomoko Horikiri, Hiromi Ohi, Mitsuaki Shibata, Makoto Ikeya, Morio Ueno, Chie Sotozono, Shigeru Kinoshita, Takahiko Sato
The neural crest is a source to produce multipotent neural crest stem cells that have a potential to differentiate into diverse cell types. The transcription factor SOX10 is expressed through early neural crest progenitors and stem cells in vertebrates. Here we report the generation of SOX10-Nano-lantern (NL) reporter human induced pluripotent stem cells (hiPS) by using CRISPR/Cas9 systems, that are beneficial to investigate the generation and maintenance of neural crest progenitor cells. SOX10-NL positive cells are produced transiently from hiPS cells by treatment with TGFβ inhibitor SB431542 and GSK3 inhibitor CHIR99021...
2017: PloS One
https://www.readbyqxmd.com/read/28077706/connexin-mediated-signaling-in-nonsensory-cells-is-crucial-for-the-development-of-sensory-inner-hair-cells-in-the-mouse-cochlea
#10
Stuart L Johnson, Federico Ceriani, Oliver Houston, Roman Polishchuk, Elena Polishchuk, Giulia Crispino, Veronica Zorzi, Fabio Mammano, Walter Marcotti
: Mutations in the genes encoding for gap junction proteins connexin 26 (Cx26) and connexin 30 (Cx30) have been linked to syndromic and nonsyndromic hearing loss in mice and humans. The release of ATP from connexin hemichannels in cochlear nonsensory cells has been proposed to be the main trigger for action potential activity in immature sensory inner hair cells (IHCs), which is crucial for the refinement of the developing auditory circuitry. Using connexin knock-out mice, we show that IHCs fire spontaneous action potentials even in the absence of ATP-dependent intercellular Ca(2+) signaling in the nonsensory cells...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28072974/-clinicopathologic-features-of-mammary-analogue-secretory-carcinoma-of-salivary-glands
#11
X P Zhang, H Ni, X Wang, H Chen, S S Shi, B Yu, X J Zhou, Q Rao
Objective: To investigate the clinicopathological features of mammary analogue secretory carcinoma (MASC) of salivary glands, and its diagnosis, differential diagnosis, immunohistochemistry and molecular pathology. Methods: Seventeen cases of MASC were enrolled, with 9 cases of salivary acinar cell carcinoma and 18 cases of adenoid cystic carcinoma as control groups from Nanjing General Hospital from 1997 to 2014 were included in this retrospective study, combined with immunohistochemistry and molecular detection of ETV6-NTRK3 gene fusion...
January 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28071739/sox10-adult-stem-cells-contribute-to-biomaterial-encapsulation-and-microvascularization
#12
Dong Wang, Aijun Wang, Fan Wu, Xuefeng Qiu, Ye Li, Julia Chu, Wen-Chin Huang, Kang Xu, Xiaohua Gong, Song Li
Implanted biomaterials and biomedical devices generally induce foreign body reaction and end up with encapsulation by a dense avascular fibrous layer enriched in extracellular matrix. Fibroblasts/myofibroblasts are thought to be the major cell type involved in encapsulation, but it is unclear whether and how stem cells contribute to this process. Here we show, for the first time, that Sox10(+) adult stem cells contribute to both encapsulation and microvessel formation. Sox10(+) adult stem cells were found sparsely in the stroma of subcutaneous loose connective tissues...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28066889/enteric-glial-activity-regulates-secretomotor-function-in-the-mouse-colon-but-does-not-acutely-affect-gut-permeability
#13
Vladimir Grubišić, Brian D Gulbransen
Enteric glial cells are often implicated in the regulation of epithelial barrier and secretomotor functions of the intestines. But whether glial cell activity regulates these functions acutely under physiological conditions is not clear. We addressed this issue by using transgenic animal models to modify the activity of enteric glia, either reducing glial expression of connexin 43 in Sox10::CreER(T2+/-) /Cx43(f/f) mice or activating glial calcium responses in GFAP::hM3Dq mice, and tested the effects on colonic barrier function and electrogenic ion transport in Ussing chambers...
January 8, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28063956/differentiation-of-mouse-enteric-nervous-system-progenitor-cells-is-controlled-by-endothelin-3-and-requires-regulation-of-ednrb-by-sox10-and-zeb2
#14
Yuli Watanabe, Laure Stanchina, Laure Lecerf, Nadjet Gacem, Andrea Conidi, Viviane Baral, Veronique Pingault, Danny Huylebroeck, Nadege Bondurand
BACKGROUND & AIMS: Maintenance and differentiation of progenitor cells in the developing enteric nervous system (ENS) are controlled by molecules such as the signaling protein endothelin 3 (EDN3), its receptor (the endothelin receptor type B, EDNRB), and the transcription factors SRY-box 10 (SOX10) and zinc finger E-box binding homeobox 2 (ZEB2). We used enteric progenitor cell (EPC) cultures and mice to study the roles of these proteins in enteric neurogenesis and their cross regulation...
January 4, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28060852/contribution-of-vascular-cells-to-neointimal-formation
#15
Falei Yuan, Dong Wang, Kang Xu, Jixian Wang, Zhijun Zhang, Li Yang, Guo-Yuan Yang, Song Li
The de-differentiation and proliferation of smooth muscle cells (SMCs) are widely accepted as the major contributor to vascular remodeling. However, recent studies indicate that vascular stem cells (VSCs) also play an important role, but their relative contribution remains to be elucidated. In this study, we used genetic lineage tracing approach to further investigate the contribution of SMCs and VSCs to neointimal thickening in response to endothelium denudation injury or artery ligation. In vitro and in vivo analysis of MYH11-cre/Rosa-loxP-RFP mouse artery showed that SMCs proliferated at a much slower rate than non-SMCs...
2017: PloS One
https://www.readbyqxmd.com/read/28038710/differentiated-squamous-intraepithelial-lesion-dsil-like-changes-in-the-epidermis-overlying-anogenital-melanocytic-nevi-a-diagnostic-pitfall
#16
Kvetoslava Michalova, Dmitry V Kazakov, Michael Michal, Ladislav Hadravsky, Denisa Kacerovska, Boris Rychly, Marketa Miesbauerova, Michal Michal
BACKGROUND: Differentiated squamous intraepithelial lesion (dSIL) is morphologically and immunohistochemically analogous in the whole anogenital region. dSIL is a premalignant lesion frequently misinterpreted histopathologically as a benign dermatosis. The authors describe a peculiar change in the basal cell layer of the epidermis/epithelium overlying anogenital melanocytic nevi that may histopathologically imitate dSIL. The aim of this study is to familiarize the pathologists with this pitfall to avoid its possible overdiagnosis as dysplasia...
February 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28013333/semaphorin-3a-expression-following-intestinal-ischemia-reperfusion-injury-in-sox10-venus-mice
#17
Masahiro Takeda, Katsumi Miyahara, Manabu Okawada, Chihiro Akazawa, Geoffrey J Lane, Atsuyuki Yamataka
PURPOSE: Semaphorin 3A (Sema3A) is a protein secreted during development of the nervous system that plays an important role in neuronal pathophysiology. However, there is no known correlation between Sema3A and intestinal ischemia/reperfusion (I/R) injury. We assessed Sema3A expression and distribution in relation to enteric nervous system (ENS) damage seen after intestinal I/R injury in Sox10-Venus mice. METHODS: Intestinal I/R injury was induced by vascular occlusion for 3 h...
December 24, 2016: Pediatric Surgery International
https://www.readbyqxmd.com/read/28012818/tissue-specific-regulation-of-the-chick-sox10e1-enhancer-by-different-sox-family-members
#18
Christina Murko, Marianne E Bronner
The transcription factor Sox10 is a key regulator of vertebrate neural crest development and serves crucial functions in the differentiation of multiple neural crest lineages. In the chick neural crest, two cis-regulatory elements have been identified that mediate Sox10 expression: Sox10E2, which initiates expression in cranial neural crest; Sox10E1 driving expression in vagal and trunk neural crest. Both also mediate Sox10 expression in the otic placode. Here, we have dissected and analyzed the Sox10E1 enhancer element to identify upstream regulatory inputs...
December 22, 2016: Developmental Biology
https://www.readbyqxmd.com/read/27979767/regulator-of-g-protein-signaling-2-rgs2-regulates-neural-crest-development-through-ppar%C3%AE-sox10-cascade
#19
Sheng-Jia Lin, Ming-Chang Chiang, Hung-Yu Shih, Li-Sung Hsu, Tu-Hsueh Yeh, Yin-Cheng Huang, Ching-Yu Lin, Yi-Chuan Cheng
Neural crest cells are multipotent progenitors that migrate extensively and differentiate into numerous derivatives. The developmental plasticity and migratory ability of neural crest cells render them an attractive model for studying numerous aspects of cell progression. We observed that zebrafish rgs2 was expressed in neural crest cells. Disrupting Rgs2 expression by using a dominant negative rgs2 construct or rgs2 morpholinos reduced GTPase-activating protein activity, induced the formation of neural crest progenitors, increased the proliferation of nonectomesenchymal neural crest cells, and inhibited the formation of ectomesenchymal neural crest derivatives...
December 13, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27973735/the-role-of-p38alpha-in-schwann-cells-in-regulating-peripheral-nerve-myelination-and-repair
#20
Sheridan L Roberts, Xin-Peng Dun, Gemma Dee, Bethany Gray, Thomas Mindos, David B Parkinson
Myelination in the peripheral nervous system (PNS) is controlled by both positive and negative regulators within Schwann cells to ensure timely onset and correct myelin thickness for saltatory conduction by neurons. Transcription factors such as Sox10, Oct6 and Krox20 form a positive regulatory network, whereas negative regulators such as cJun and Sox2 oppose myelination in Schwann cells. The role of the p38 mitogen activated protein kinase (MAPK) pathway has been studied in PNS myelination, but its precise function remains unclear, with both positive and negative effects of p38 activity reported upon both myelination and processes of nerve repair...
December 14, 2016: Journal of Neurochemistry
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