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https://www.readbyqxmd.com/read/29217752/mapping-the-distribution-of-stem-progenitor-cells-across-the-middle-ear-during-homeostasis-and-inflammation
#1
Abigail S Tucker, Carlene J Dyer, Juan M Fons Romero, Tathyane H N Teshima, Jennifer C Fuchs, Hannah Thompson
The middle ear epithelium is derived from neural crest and endoderm, which line distinct regions of the middle ear cavity. Here we investigate the distribution of putative stem cell markers in the middle ear combined with an analysis of the location of label retaining cells (LRCs) to create a map of the middle ear mucosa. We show that proliferating cells and LRCs were associated with specific regions of the ear epithelium, concentrated in the hypotympanum at the base of the auditory bulla and around the ear drum...
December 7, 2017: Development
https://www.readbyqxmd.com/read/29217751/cellular-basis-of-brain-maturation-and-acquisition-of-complex-behaviors-in-salamanders
#2
Alberto Joven, Heng Wang, Tiago Pinheiro, L Shahul Hameed, Laure Belnoue, András Simon
The overall bauplan of the tetrapod brain is highly conserved, yet significant variations exist among species in terms of brain size, structural composition and cellular diversity. Understanding processes underlying neural and behavioral development in a wide range of species is important both from an evolutionary developmental perspective as well as for the identification of cell sources with post-developmental neurogenic potential. Here we characterize germinal processes in the brain of Notophthalmus viridescens and Pleurodeles waltl during both development and adulthood...
December 7, 2017: Development
https://www.readbyqxmd.com/read/29215726/sel1l-knockdown-negatively-influences-zebrafish-embryos-endothelium
#3
A Barbieri, S Carra, P De Blasio, F Cotelli, I Biunno
SEL1L (Suppressor/Enhancer of Lin-12-like) is a highly conserved gene associated with the Endoplasmic Reticulum-Associated Degradation (ERAD) pathway and involved in mediating the balance between stem cells self-renewal and differentiation of neural progenitors. It has been recently shown that SEL1L KO mice are embryonic lethal and display altered organogenesis. To better characterize the function of SEL1L in the early stages of embryonic development, we turned to the zebrafish model (D. rerio). After exploring sel1l expression by RT-PCR and in situ hybridization, we employed a morpholino-mediated down-regulation approach...
December 7, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29214313/rna-sequencing-gene-expression-profiling-of-orbital-adipose-derived-stem-cell-population-implicate-hox-genes-and-wnt-signaling-dysregulation-in-the-pathogenesis-of-thyroid-associated-orbitopathy
#4
Wensi Tao, Juan A Ayala-Haedo, Matthew G Field, Daniel Pelaez, Sara T Wester
Purpose: The purpose of this study was to characterize the intrinsic cellular properties of orbital adipose-derived stem cells (OASC) from patients with thyroid-associated orbitopathy (TAO) and healthy controls. Methods: Orbital adipose tissue was collected from a total of nine patients: four controls and five patients with TAO. Isolated OASC were characterized with mesenchymal stem cell-specific markers. Orbital adipose-derived stem cells were differentiated into three lineages: chondrocytes, osteocytes, and adipocytes...
December 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29212818/the-histone-demethylase-kdm5a-is-required-for-the-repression-of-astrocytogenesis-and-regulated-by-the-translational-machinery-in-neural-progenitor-cells
#5
Sun-Young Kong, Woosuk Kim, Ha-Rim Lee, Hyun-Jung Kim
Histone demethylases are known to play important roles in the determination of the fate of stem cells and in cancer progression. In this study, we show that the lysine 4 of histone H3 (H3K4), lysine-specific demethylase 5A (KDM5A) is essential for the repression of astrocyte differentiation in neural progenitor cells (NPCs), and its expression is regulated by translational machinery. Knockdown of KDM5A in NPCs increased astrocytogenesis, and conversely, KDM5A overexpression reduced the transcriptional activity of the Gfap promoter...
December 6, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29212715/bcas1-expression-defines-a-population-of-early-myelinating-oligodendrocytes-in-multiple-sclerosis-lesions
#6
Maryam K Fard, Franziska van der Meer, Paula Sánchez, Ludovico Cantuti-Castelvetri, Sunit Mandad, Sarah Jäkel, Eugenio F Fornasiero, Sebastian Schmitt, Marc Ehrlich, Laura Starost, Tanja Kuhlmann, Christina Sergiou, Verena Schultz, Claudia Wrzos, Wolfgang Brück, Henning Urlaub, Leda Dimou, Christine Stadelmann, Mikael Simons
Investigations into brain function and disease depend on the precise classification of neural cell types. Cells of the oligodendrocyte lineage differ greatly in their morphology, but accurate identification has thus far only been possible for oligodendrocyte progenitor cells and mature oligodendrocytes in humans. We find that breast carcinoma amplified sequence 1 (BCAS1) expression identifies an oligodendroglial subpopulation in the mouse and human brain. These cells are newly formed, myelinating oligodendrocytes that segregate from oligodendrocyte progenitor cells and mature oligodendrocytes and mark regions of active myelin formation in development and in the adult...
December 6, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29208348/nuclear-migration-in-mammalian-brain-development
#7
REVIEW
Chiara Bertipaglia, João Carlos Gonçalves, Richard Bert Vallee
During development of the mammalian brain, neural stem cells divide and give rise to adult stem cells, glia and neurons, which migrate to their final locations. Nuclear migration is an important feature of neural stem cell (radial glia progenitor) proliferation and subsequent postmitotic neuronal migration. Defects in nuclear migration contribute to severe neurodevelopmental disorders such as microcephaly and lissencephaly. In this review, we address the cellular and molecular mechanisms responsible for nuclear migration during the radial glia cell cycle and postmitotic neuronal migration, with a particular focus on the role of molecular motors and cytoskeleton dynamics in regulating nuclear behavior...
December 2, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/29205638/long-noncoding-rna-1604-orchestrates-neural-differentiation-through-the-mir-200c-zeb-axis
#8
Rong Weng, Chenqi Lu, Xiaoqin Liu, Guoping Li, Yuanyuan Lan, Jing Qiao, Mingliang Bai, Zhaojie Wang, Xudong Guo, Dan Ye, Zeyidan Jiapaer, Yiwei Yang, Chenliang Xia, Guiying Wang, Jiuhong Kang
Clarifying the regulatory mechanisms of embryonic stem cell (ESC) neural differentiation is helpful not only for understanding neural development, but also for obtaining high-quality neural progenitor cells required by stem cell therapy of neurodegenerative diseases. Here, we found that long noncoding RNA 1604 (lncRNA-1604) was highly expressed in cytoplasm during neural differentiation, and knockdown of lncRNA-1604 significantly repressed neural differentiation of mouse ESCs both in vitro and in vivo. Bioinformatics prediction and mechanistic analysis revealed that lncRNA-1604 functioned as a novel competing endogenous RNA of miR-200c and regulated the core transcription factors ZEB1 and ZEB2 during neural differentiation...
December 5, 2017: Stem Cells
https://www.readbyqxmd.com/read/29205371/characterization-of-the-canine-rostral-ventricular-subventricular-zone-morphological-immunohistochemical-ultrastructural-and-neurosphere-assay-studies
#9
Francisco Fernández-Flores, José Manuel García-Verdugo, Raquel Martín-Ibáñez, Cristina Herranz, Dolors Fondevila, Josep María Canals, Carles Arús, Martí Pumarola
The mammalian ventricular-subventricular zone (V-SVZ) presents the highest neurogenic potential in the brain of the adult individual. In rodents, it is mainly composed of chains of neuroblasts. In humans, it is organized in layers where neuroblasts do not form chains. The aim of this study is to describe the cytoarchitecture of canine V-SVZ (cV-SVZ), to assess its neurogenic potential, and to compare our results with those previously described in other species. We have studied by histology, immunohistochemistry (IHC), electron microscopy and neurosphere assay the morphology, cytoarchitecture and neurogenic potential of cV-SVZ...
December 4, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/29204982/assessment-of-the-mri-and-behavioral-test-results-in-focal-cerebral-ischemia-reperfusion-model-in-rat-after-separate-and-combined-use-of-mouse-derived-neural-progenitor-cells-human-derived-neural-progenitor-cells-and-atorvastatin
#10
Alican Tahta, Nail Izgi, Tugba Bagci Onder, Ece Erdag, Yavuz Aras, Cetin Genc
AIM: We aimed to assess the efficacy of Neural progenitor cell (NPC) transplantation in ischemic stroke, and to investigate whether atorvastatin enhances therapeutic potency of NPC after stroke. MATERIAL AND METHODS: Focal cerebral ischemia-reperfusion model was performed by transient occlusion of middle cerebral artery. Rats were assigned randomly to receive intracerebral transplantation of mouse NPC alone (mNPC), human NPC alone (hNPC), mouse NPC plus oral atorvastatin (mNPC+A), human NPC plus oral atorvastatin (hNPC+A), oral atorvastatin alone, or intracerebral Dulbecco's Modified Eagle's medium injection (control group)...
November 1, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29204830/being-a-neural-stem-cell-a-matter-of-character-but-defined-by-the-microenvironment
#11
Evangelia Andreopoulou, Asterios Arampatzis, Melina Patsoni, Ilias Kazanis
The cells that build the nervous system, either this is a small network of ganglia or a complicated primate brain, are called neural stem and progenitor cells. Even though the very primitive and the very recent neural stem cells (NSCs) share common basic characteristics that are hard-wired within their character, such as the expression of transcription factors of the SoxB family, their capacity to give rise to extremely different neural tissues depends significantly on instructions from the microenvironment...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29202481/bone-marrow-drives-central-nervous-system-regeneration-after-radiation-injury
#12
Jorg Dietrich, Ninib Baryawno, Naema Nayyar, Yannis K Valtis, Betty Yang, Ina Ly, Antoine Besnard, Nicolas Severe, Karin U Gustafsson, Ovidiu C Andronesi, Tracy T Batchelor, Amar Sahay, David T Scadden
Nervous system injury is a frequent result of cancer therapy involving cranial irradiation, leaving patients with marked memory and other neurobehavioral disabilities. Here, we report an unanticipated link between bone marrow and brain in the setting of radiation injury. Specifically, we demonstrate that bone marrow-derived monocytes and macrophages are essential for structural and functional repair mechanisms, including regeneration of cerebral white matter and improvement in neurocognitive function. Using a granulocyte-colony stimulating factor (G-CSF) receptor knockout mouse model in combination with bone marrow cell transplantation, MRI, and neurocognitive functional assessments, we demonstrate that bone marrow-derived G-CSF-responsive cells home to the injured brain and are critical for altering neural progenitor cells and brain repair...
December 4, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29201059/a-look-into-stem-cell-therapy-exploring-the-options-for-treatment-of-ischemic-stroke
#13
REVIEW
Cesar Reis, Michael Wilkinson, Haley Reis, Onat Akyol, Vadim Gospodarev, Camila Araujo, Sheng Chen, John H Zhang
Neural stem cells (NSCs) offer a potential therapeutic benefit in the recovery from ischemic stroke. Understanding the role of endogenous neural stem and progenitor cells under normal physiological conditions aids in analyzing their effects after ischemic injury, including their impact on functional recovery and neurogenesis at the site of injury. Recent animal studies have utilized unique subsets of exogenous and endogenous stem cells as well as preconditioning with pharmacologic agents to better understand the best situation for stem cell proliferation, migration, and differentiation...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29194577/cerebral-cortex-development-an-outside-in-perspective
#14
REVIEW
Gulistan Agirman, Loic Broix, Laurent Nguyen
The cerebral cortex is a complex structure that contains different classes of neurons distributed within six layers and regionally organized into a highly specialized area. Cortical layering arises during embryonic development in an inside-out manner as forebrain progenitors proliferate and generate distinct waves of interneurons and projection neurons. Radial glial cells (RGCs) derive from neuroepithelial cells and are the founding cortical progenitors. At the onset of corticogenesis, RGCs expand their pool by proliferative divisions...
November 30, 2017: FEBS Letters
https://www.readbyqxmd.com/read/29193520/physiological-significance-of-multipolar-cells-generated-from-neural-stem-cells-and-progenitors-for-the-establishment-of-neocortical-cytoarchitecture
#15
REVIEW
Ken-Ichi Mizutani
Neurogenesis encompasses an entire set of events that leads to the generation of newborn neurons from neural stem cells and more committed progenitor cells, including cell division, the production of migratory precursors and their progeny, differentiation and integration into circuits. In particular, the precise control of neuronal migration and morphological changes is essential for the development of the neocortex. Postmitotic cells within the intermediate zone have been found to transiently assume a characteristic "multipolar" morphology, after which a multipolar-to-bipolar transition occurs before the cells enter the cortical plate; however, the importance of this multipolar phase in the establishment of mature cortical cytoarchitecture and the precise genetic control of this phase remains largely unknown...
November 29, 2017: Genes to Cells: Devoted to Molecular & Cellular Mechanisms
https://www.readbyqxmd.com/read/29193426/low-osteogenic-yield-in-human-pluripotent-stem-cells-associates-with-differential-neural-crest-promoter-methylation
#16
Nicole Renee Lee Sparks, Ivann Kenneth Carvajal Martinez, Cristina Helen Soto, Nicole Isolde Zur Nieden
Human pluripotent stem cell-derived osteoblasts possess great potential for utilization in bone disorder elucidation and repair; yet, while the general ability of human pluripotent stem cells to differentiate into osteoblasts and lay down bone-specific matrix has been shown, previous studies lack the complete characterization of the process whereby such osteoblasts are derived as well as a comparison between the osteogenic efficiency of multiple cell lines. Here, we compared the osteogenic potential of two human induced pluripotent stem cell lines (RIV9 and RIV4) to human H9 embryonic stem cells...
November 29, 2017: Stem Cells
https://www.readbyqxmd.com/read/29192282/functionalized-gold-nanorod-nanocomposite-system-to-modulate-differentiation-of-human-mesenchymal-stem-cells-into-neural-like-progenitors
#17
Karrer M Alghazali, Steven D Newby, Zeid A Nima, Rabab N Hamzah, Fumiya Watanabe, Shawn E Bourdo, Thomas J Masi, Stacy M Stephenson, David E Anderson, Madhu S Dhar, Alexandru S Biris
A 2D multifunctional nanocomposite system of gold nanorods (AuNRs) was developed. Gold nanorods were functionalized via polyethylene glycol with a terminal amine, and, were characterized using transmission and scanning electron microscopy, ultra violet-visible and X-ray photoelectron spectroscopy, and Zeta-potential. The system was cytocompatible to and maintained the integrity of Schwann cells. The neurogenic potential of adipose tissue - derived human mesenchymal stem cells (hMSCs) was evaluated in vitro...
November 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29192200/crispr-cas9-mediated-genome-editing-in-na%C3%A3-ve-human-embryonic-stem-cells
#18
Eva Z Jacobs, Sharat Warrier, Pieter-Jan Volders, Eva D'haene, Eva Van Lombergen, Lies Vantomme, Margot Van der Jeught, Björn Heindryckx, Björn Menten, Sarah Vergult
The combination of genome-edited human embryonic stem cells (hESCs) and subsequent neural differentiation is a powerful tool to study neurodevelopmental disorders. Since the naïve state of pluripotency has favourable characteristics for efficient genome-editing, we optimized a workflow for the CRISPR/Cas9 system in these naïve stem cells. Editing efficiencies of respectively 1.3-8.4% and 3.8-19% were generated with the Cas9 nuclease and the D10A Cas9 nickase mutant. Next to this, wildtype and genome-edited naïve hESCs were successfully differentiated to neural progenitor cells...
November 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29191977/the-tumor-suppressor-brat-controls-neuronal-stem-cell-lineages-by-inhibiting-deadpan-and-zelda
#19
Ilka Reichardt, François Bonnay, Victoria Steinmann, Inga Loedige, Thomas R Burkard, Gunter Meister, Juergen A Knoblich
The TRIM-NHL protein Brain tumor (Brat) acts as a tumor suppressor in the Drosophila brain, but how it suppresses tumor formation is not completely understood. Here, we combine temperature-controlled brat RNAi with transcriptome analysis to identify the immediate Brat targets in Drosophila neuroblasts. Besides the known target Deadpan (Dpn), our experiments identify the transcription factor Zelda (Zld) as a critical target of Brat. Our data show that Zld is expressed in neuroblasts and required to allow re-expression of Dpn in transit-amplifying intermediate neural progenitors...
November 30, 2017: EMBO Reports
https://www.readbyqxmd.com/read/29189064/the-updated-world-health-organization-glioma-classification-cellular-and-molecular-origins-of-adult-infiltrating-gliomas
#20
David J Pisapia
CONTEXT: - In the recently updated World Health Organization (WHO) classification of central nervous system tumors, our concept of infiltrating gliomas as a molecular dichotomy between oligodendroglial and astrocytic tumors has been codified. Advances in animal models of glioma and a wealth of sophisticated molecular analyses of human glioma tissue have led to a greater understanding of some of the biologic underpinnings of gliomagenesis. OBJECTIVE: - To review our understanding of gliomagenesis in the setting of the recently updated WHO classification of central nervous system tumors...
December 2017: Archives of Pathology & Laboratory Medicine
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