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Cell Stem Cell

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https://www.readbyqxmd.com/read/27889318/neurogenic-radial-glia-like-cells-in-meninges-migrate-and-differentiate-into-functionally-integrated-neurons-in-the-neonatal-cortex
#1
Francesco Bifari, Ilaria Decimo, Annachiara Pino, Enric Llorens-Bobadilla, Sheng Zhao, Christian Lange, Gabriella Panuccio, Bram Boeckx, Bernard Thienpont, Stefan Vinckier, Sabine Wyns, Ann Bouché, Diether Lambrechts, Michele Giugliano, Mieke Dewerchin, Ana Martin-Villalba, Peter Carmeliet
Whether new neurons are added in the postnatal cerebral cortex is still debated. Here, we report that the meninges of perinatal mice contain a population of neurogenic progenitors formed during embryonic development that migrate to the caudal cortex and differentiate into Satb2(+) neurons in cortical layers II-IV. The resulting neurons are electrically functional and integrated into local microcircuits. Single-cell RNA sequencing identified meningeal cells with distinct transcriptome signatures characteristic of (1) neurogenic radial glia-like cells (resembling neural stem cells in the SVZ), (2) neuronal cells, and (3) a cell type with an intermediate phenotype, possibly representing radial glia-like meningeal cells differentiating to neuronal cells...
November 17, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27889319/cell-type-specific-chromatin-states-differentially-prime-squamous-cell-carcinoma-tumor-initiating-cells-for-epithelial-to-mesenchymal-transition
#2
Mathilde Latil, Dany Nassar, Benjamin Beck, Soufiane Boumahdi, Li Wang, Audrey Brisebarre, Christine Dubois, Erwin Nkusi, Sandrine Lenglez, Agnieszka Checinska, Alizée Vercauteren Drubbel, Michael Devos, Wim Declercq, Rui Yi, Cédric Blanpain
Epithelial to mesenchymal transition (EMT) in cancer cells has been associated with metastasis, stemness, and resistance to therapy. Some tumors undergo EMT while others do not, which may reflect intrinsic properties of their cell of origin. However, this possibility is largely unexplored. By targeting the same oncogenic mutations to discrete skin compartments, we show that cell-type-specific chromatin and transcriptional states differentially prime tumors to EMT. Squamous cell carcinomas (SCCs) derived from interfollicular epidermis (IFE) are generally well differentiated, while hair follicle (HF) stem cell-derived SCCs frequently exhibit EMT, efficiently form secondary tumors, and possess increased metastatic potential...
November 16, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27867037/cardiac-fibroblasts-adopt-osteogenic-fates-and-can-be-targeted-to-attenuate-pathological-heart-calcification
#3
Indulekha C L Pillai, Shen Li, Milagros Romay, Larry Lam, Yan Lu, Jie Huang, Nathaniel Dillard, Marketa Zemanova, Liudmilla Rubbi, Yibin Wang, Jason Lee, Ming Xia, Owen Liang, Ya-Hong Xie, Matteo Pellegrini, Aldons J Lusis, Arjun Deb
Mammalian tissues calcify with age and injury. Analogous to bone formation, osteogenic cells are thought to be recruited to the affected tissue and induce mineralization. In the heart, calcification of cardiac muscle leads to conduction system disturbances and is one of the most common pathologies underlying heart blocks. However the cell identity and mechanisms contributing to pathological heart muscle calcification remain unknown. Using lineage tracing, murine models of heart calcification and in vivo transplantation assays, we show that cardiac fibroblasts (CFs) adopt an osteoblast cell-like fate and contribute directly to heart muscle calcification...
November 15, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27867035/two-way-conversion-between-lipogenic-and-myogenic-fibroblastic-phenotypes-marks-the-progression-and-resolution-of-lung-fibrosis
#4
Elie El Agha, Alena Moiseenko, Vahid Kheirollahi, Stijn De Langhe, Slaven Crnkovic, Grazyna Kwapiszewska, Djuro Kosanovic, Felix Schwind, Ralph T Schermuly, Ingrid Henneke, BreAnne MacKenzie, Jennifer Quantius, Susanne Herold, Aglaia Ntokou, Katrin Ahlbrecht, Rory E Morty, Andreas Günther, Werner Seeger, Saverio Bellusci
Idiopathic pulmonary fibrosis (IPF) is a form of progressive interstitial lung disease with unknown etiology. Due to a lack of effective treatment, IPF is associated with a high mortality rate. The hallmark feature of this disease is the accumulation of activated myofibroblasts that excessively deposit extracellular matrix proteins, thus compromising lung architecture and function and hindering gas exchange. Here we investigated the origin of activated myofibroblasts and the molecular mechanisms governing fibrosis formation and resolution...
November 14, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27889317/the-p53-family-coordinates-wnt-and-nodal-inputs-in-mesendodermal-differentiation-of-embryonic-stem-cells
#5
Qiong Wang, Yilong Zou, Sonja Nowotschin, Sang Yong Kim, Qing V Li, Chew-Li Soh, Jie Su, Chao Zhang, Weiping Shu, Qiaoran Xi, Danwei Huangfu, Anna-Katerina Hadjantonakis, Joan Massagué
In this study, we outline a regulatory network that involves the p53 tumor suppressor family and the Wnt pathway acting together with the TGF-β pathway in mesendodermal differentiation of mouse and human embryonic stem cells. Knockout of all three members, p53, p63, and p73, shows that the p53 family is essential for mesendoderm specification during exit from pluripotency in embryos and in culture. Wnt3 and its receptor Fzd1 are direct p53 family target genes in this context, and induction of Wnt signaling by p53 is critical for activation of mesendodermal differentiation genes...
November 9, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27840021/conversion-of-terminally-committed-hepatocytes-to-culturable-bipotent-progenitor-cells-with-regenerative-capacity
#6
Takeshi Katsuda, Masaki Kawamata, Keitaro Hagiwara, Ryou-U Takahashi, Yusuke Yamamoto, Fernando D Camargo, Takahiro Ochiya
A challenge for advancing approaches to liver regeneration is loss of functional differentiation capacity when hepatocyte progenitors are maintained in culture. Recent lineage-tracing studies have shown that mature hepatocytes (MHs) convert to an immature state during chronic liver injury, and we investigated whether this conversion could be recapitulated in vitro and whether such converted cells could represent a source of expandable hepatocytes. We report that a cocktail of small molecules, Y-27632, A-83-01, and CHIR99021, can convert rat and mouse MHs in vitro into proliferative bipotent cells, which we term chemically induced liver progenitors (CLiPs)...
November 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27840022/myogenic-progenitor-cells-control-extracellular-matrix-production-by-fibroblasts-during-skeletal-muscle-hypertrophy
#7
Christopher S Fry, Tyler J Kirby, Kate Kosmac, John J McCarthy, Charlotte A Peterson
Satellite cells, the predominant stem cell population in adult skeletal muscle, are activated in response to hypertrophic stimuli and give rise to myogenic progenitor cells (MPCs) within the extracellular matrix (ECM) that surrounds myofibers. This ECM is composed largely of collagens secreted by interstitial fibrogenic cells, which influence satellite cell activity and muscle repair during hypertrophy and aging. Here we show that MPCs interact with interstitial fibrogenic cells to ensure proper ECM deposition and optimal muscle remodeling in response to hypertrophic stimuli...
October 25, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27840020/functional-human-oocytes-generated-by-transfer-of-polar-body-genomes
#8
Hong Ma, Ryan C O'Neil, Nuria Marti Gutierrez, Manoj Hariharan, Zhuzhu Z Zhang, Yupeng He, Cengiz Cinnioglu, Refik Kayali, Eunju Kang, Yeonmi Lee, Tomonari Hayama, Amy Koski, Joseph Nery, Rosa Castanon, Rebecca Tippner-Hedges, Riffat Ahmed, Crystal Van Dyken, Ying Li, Susan Olson, David Battaglia, David M Lee, Diana H Wu, Paula Amato, Don P Wolf, Joseph R Ecker, Shoukhrat Mitalipov
Oocyte defects lie at the heart of some forms of infertility and could potentially be addressed therapeutically by alternative routes for oocyte formation. Here, we describe the generation of functional human oocytes following nuclear transfer of first polar body (PB1) genomes from metaphase II (MII) oocytes into enucleated donor MII cytoplasm (PBNT). The reconstructed oocytes supported the formation of de novo meiotic spindles and, after fertilization with sperm, meiosis completion and formation of normal diploid zygotes...
October 20, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27666011/mesenchymal-inflammation-drives-genotoxic-stress-in-hematopoietic-stem-cells-and-predicts-disease-evolution-in-human-pre-leukemia
#9
Noemi A Zambetti, Zhen Ping, Si Chen, Keane J G Kenswil, Maria A Mylona, Mathijs A Sanders, Remco M Hoogenboezem, Eric M J Bindels, Maria N Adisty, Paulina M H Van Strien, Cindy S van der Leije, Theresia M Westers, Eline M P Cremers, Chiara Milanese, Pier G Mastroberardino, Johannes P T M van Leeuwen, Bram C J van der Eerden, Ivo P Touw, Taco W Kuijpers, Roland Kanaar, Arjan A van de Loosdrecht, Thomas Vogl, Marc H G P Raaijmakers
Mesenchymal niche cells may drive tissue failure and malignant transformation in the hematopoietic system, but the underlying molecular mechanisms and relevance to human disease remain poorly defined. Here, we show that perturbation of mesenchymal cells in a mouse model of the pre-leukemic disorder Shwachman-Diamond syndrome (SDS) induces mitochondrial dysfunction, oxidative stress, and activation of DNA damage responses in hematopoietic stem and progenitor cells. Massive parallel RNA sequencing of highly purified mesenchymal cells in the SDS mouse model and a range of human pre-leukemic syndromes identified p53-S100A8/9-TLR inflammatory signaling as a common driving mechanism of genotoxic stress...
September 10, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27912091/genetic-ablation-of-axl-does-not-protect-human-neural-progenitor-cells-and-cerebral-organoids-from-zika-virus-infection
#10
Michael F Wells, Max R Salick, Ole Wiskow, Daniel J Ho, Kathleen A Worringer, Robert J Ihry, Sravya Kommineni, Bilada Bilican, Joseph R Klim, Ellen J Hill, Liam T Kane, Chaoyang Ye, Ajamete Kaykas, Kevin Eggan
Zika virus (ZIKV) can cross the placental barrier, resulting in infection of the fetal brain and neurological defects including microcephaly. The cellular tropism of ZIKV and the identity of attachment factors used by the virus to gain access to key cell types involved in pathogenesis are under intense investigation. Initial studies suggested that ZIKV preferentially targets neural progenitor cells (NPCs), providing an explanation for the developmental phenotypes observed in some pregnancies. The AXL protein has been nominated as a key attachment factor for ZIKV in several cell types including NPCs...
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27912090/advances-in-zika-virus-research-stem-cell-models-challenges-and-opportunities
#11
REVIEW
Guo-Li Ming, Hengli Tang, Hongjun Song
The re-emergence of Zika virus (ZIKV) and its suspected link with various disorders in newborns and adults led the World Health Organization to declare a global health emergency. In response, the stem cell field quickly established platforms for modeling ZIKV exposure using human pluripotent stem cell-derived neural progenitors and brain organoids, fetal tissues, and animal models. These efforts provided significant insight into cellular targets, pathogenesis, and underlying biological mechanisms of ZIKV infection as well as platforms for drug testing...
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27912089/regulatory-circuits-and-bi-directional-signaling-between-stem-cells-and-their-progeny
#12
Purushothama Rao Tata, Jayaraj Rajagopal
Feedback signals from daughter cells to stem cells are well studied and known to provide important feedback cues. Emerging evidence shows that stem cells also send feedforward signals to their progeny. Complex circuits involving both negative and positive feedback and feedforward signals likely contribute to robust tissue maintenance and regeneration.
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27912088/enhancing-stem-cell-transplantation-with-nutri-technology
#13
Valter D Longo, Salvatore Cortellino
It is necessary to employ myeloablative irradiation or chemotherapy to deplete the HSC niche to optimize hematopoietic stem cell transplantation. In a recent issue of Science, Taya and colleagues provide evidence for an alternative to the toxic chemoirradiative procedure by showing that a valine-restricted diet is sufficient to empty the bone marrow niche.
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27912087/plug-and-play-brain-understanding-integration-of-transplanted-neurons-for-brain-repair
#14
Shane Grealish, Malin Parmar
In a recent issue of Nature,Falkner et al. (2016) use chronic two-photon imaging, virus-based transsynaptic tracing, and dynamic calcium indicators to elegantly demonstrate extensive in vivo functional maturation and target-specific functional integration of transplanted embryonic mouse cortical progenitors into adult lesioned visual cortical circuits.
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27912086/the-mediator-of-hematopoietic-stem-cell-homeostasis
#15
Sneha Borikar, Jennifer J Trowbridge
Mechanisms establishing and maintaining promoter-enhancer interactions in hematopoietic stem cells (HSCs) to maintain stem cell identity are not fully understood. In this issue of Cell Stem Cell, Aranda-Orgilles et al. (2016) describe a role for a member of the Mediator complex in maintaining HSC-specific enhancers and hematopoietic homeostasis.
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27912085/pdgfa-makes-thin-skin-thicker-molecular-regulation-of-adipose-progenitor-maintenance
#16
Shingo Kajimura
Adipocyte progenitor proliferation and self-renewal contribute to adipose tissue maintenance; however, the regulatory circuits of these processes are less understood. In this issue of Cell Stem Cell, Rivera-Gonzalez et al. (2016) show that PDGFA, which acts through PI3K-Akt pathways, plays a vital role in the proliferation and maintenance of adipocyte progenitors in dermal adipose tissues.
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27912084/fetal-to-adult-hematopoiesis-with-the-flk-of-a-switch
#17
Stijn Vanhee, Joan Yuan
Blood development relies on discrete stem and progenitor cell populations with unclear lineage relationships and distinct functional characteristics that change during ontogeny. In this issue of Cell Stem Cell, Beaudin et al. (2016) identify a hematopoietic stem cell population with fetal characteristics that is developmentally restricted yet capable of long-term multi-lineage reconstitution upon transplantation into adult recipients.
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27867036/dna-methylation-dynamics-of-human-hematopoietic-stem-cell-differentiation
#18
Matthias Farlik, Florian Halbritter, Fabian Müller, Fizzah A Choudry, Peter Ebert, Johanna Klughammer, Samantha Farrow, Antonella Santoro, Valerio Ciaurro, Anthony Mathur, Rakesh Uppal, Hendrik G Stunnenberg, Willem H Ouwehand, Elisa Laurenti, Thomas Lengauer, Mattia Frontini, Christoph Bock
Hematopoietic stem cells give rise to all blood cells in a differentiation process that involves widespread epigenome remodeling. Here we present genome-wide reference maps of the associated DNA methylation dynamics. We used a meta-epigenomic approach that combines DNA methylation profiles across many small pools of cells and performed single-cell methylome sequencing to assess cell-to-cell heterogeneity. The resulting dataset identified characteristic differences between HSCs derived from fetal liver, cord blood, bone marrow, and peripheral blood...
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27746098/skin-adipocyte-stem-cell-self-renewal-is-regulated-by-a-pdgfa-akt-signaling-axis
#19
Guillermo C Rivera-Gonzalez, Brett A Shook, Johanna Andrae, Brandon Holtrup, Katherine Bollag, Christer Betsholtz, Matthew S Rodeheffer, Valerie Horsley
Tissue growth and maintenance requires stem cell populations that self-renew, proliferate, and differentiate. Maintenance of white adipose tissue (WAT) requires the proliferation and differentiation of adipocyte stem cells (ASCs) to form postmitotic, lipid-filled mature adipocytes. Here we use the dynamic adipogenic program that occurs during hair growth to uncover an unrecognized regulator of ASC self-renewal and proliferation, PDGFA, which activates AKT signaling to drive and maintain the adipogenic program in the skin...
December 1, 2016: Cell Stem Cell
https://www.readbyqxmd.com/read/27666010/a-transient-developmental-hematopoietic-stem-cell-gives-rise-to-innate-like-b-and-t-cells
#20
Anna E Beaudin, Scott W Boyer, Jessica Perez-Cunningham, Gloria E Hernandez, S Christopher Derderian, Chethan Jujjavarapu, Eric Aaserude, Tippi MacKenzie, E Camilla Forsberg
The generation of distinct hematopoietic cell types, including tissue-resident immune cells, distinguishes fetal from adult hematopoiesis. However, the mechanisms underlying differential cell production to generate a layered immune system during hematopoietic development are unclear. Using an irreversible lineage-tracing model, we identify a definitive hematopoietic stem cell (HSC) that supports long-term multilineage reconstitution upon transplantation into adult recipients but does not persist into adulthood in situ...
December 1, 2016: Cell Stem Cell
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