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https://www.readbyqxmd.com/read/29335606/conserved-properties-of-dentate-gyrus-neurogenesis-across-postnatal-development-revealed-by-single-cell-rna-sequencing
#1
Hannah Hochgerner, Amit Zeisel, Peter Lönnerberg, Sten Linnarsson
The dentate gyrus of the hippocampus is a brain region in which neurogenesis persists into adulthood; however, the relationship between developmental and adult dentate gyrus neurogenesis has not been examined in detail. Here we used single-cell RNA sequencing to reveal the molecular dynamics and diversity of dentate gyrus cell types in perinatal, juvenile, and adult mice. We found distinct quiescent and proliferating progenitor cell types, linked by transient intermediate states to neuroblast stages and fully mature granule cells...
January 15, 2018: Nature Neuroscience
https://www.readbyqxmd.com/read/29323290/clonal-analysis-of-lineage-fate-in-native-haematopoiesis
#2
Alejo E Rodriguez-Fraticelli, Samuel L Wolock, Caleb S Weinreb, Riccardo Panero, Sachin H Patel, Maja Jankovic, Jianlong Sun, Raffaele A Calogero, Allon M Klein, Fernando D Camargo
Haematopoiesis, the process of mature blood and immune cell production, is functionally organized as a hierarchy, with self-renewing haematopoietic stem cells and multipotent progenitor cells sitting at the very top. Multiple models have been proposed as to what the earliest lineage choices are in these primitive haematopoietic compartments, the cellular intermediates, and the resulting lineage trees that emerge from them. Given that the bulk of studies addressing lineage outcomes have been performed in the context of haematopoietic transplantation, current models of lineage branching are more likely to represent roadmaps of lineage potential than native fate...
January 11, 2018: Nature
https://www.readbyqxmd.com/read/29311234/mycoplasma-bovis-induced-inhibition-of-bovine-pbmc-proliferation-is-ameliorated-after-blocking-the-immune-inhibitory-programmed-death-1-pd-1-receptor
#3
Muhammad Suleman, Farhan S Cyprian, Steve Jimbo, Teresia Maina, Tracy Prysliak, Claire Windeyer, Jose Perez-Casal
Mycoplasma bovis (M. bovis) induced-immune suppression is a major obstacle faced by the host for controlling infections. M. bovis impairment of antigen-specific T-cells responses is achieved through inhibiting the proliferation of peripheral-blood mononuclear cells (PBMC). This impairment may contribute to the persistence of M. bovis infection in various sites including lungs and its systemic spread to various organs like joints, with the underlying mechanisms remaining elusive. Here, we elucidated the role of the immune-inhibitory receptor programmed death-1 (PD-1) and its ligand (PD-L1) in M...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29305158/tbr2-antagonizes-retinoic-acid-dependent-neuronal-differentiation-by-repressing-zfp423-during-corticogenesis
#4
Luca Massimino, Lisbeth Flores-Garcia, Bruno Di Stefano, Gaia Colasante, Cecilia Icoresi-Mazzeo, Mattia Zaghi, Bruce A Hamilton, Alessandro Sessa
During cerebral cortex development, neural progenitors are required to elaborate a variety of cell differentiation signals to which they are continuously exposed. RA acid is a potent inducer of neuronal differentiation as it was found to influence cortical development. We report herein that TBR2, a transcription factor specific to Intermediate (Basal) Neural Progenitors (INPs), represses activation of the RA responsive element and expression of RA target genes in cell lines. This repressive action on RA signaling was functionally confirmed by the decrease of RA-mediated neuronal differentiation in neural stem cells stably overexpressing TBR2...
January 2, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29288875/ecsit-links-tlr-and-bmp-signaling-in-fop-connective-tissue-progenitor-cells
#5
REVIEW
Haitao Wang, Edward M Behrens, Robert J Pignolo, Frederick S Kaplan
Clinical and laboratory observations strongly suggest that the innate immune system induces flare-ups in the setting of dysregulated bone morphogenetic protein (BMP) signaling in fibrodysplasia ossificans progressiva (FOP). In order to investigate the signaling substrates of this hypothesis, we examined toll-like receptor (TLR) activation and bone morphogenetic protein (BMP) signaling in connective tissue progenitor cells (CTPCs) from FOP patients and unaffected individuals. We found that inflammatory stimuli broadly activate TLR expression in FOP CTPCs and that TLR3/TLR4 signaling amplifies BMP pathway signaling through both ligand dependent and independent mechanisms...
December 27, 2017: Bone
https://www.readbyqxmd.com/read/29273475/plectin-controls-biliary-tree-architecture-and-stability-in-cholestasis
#6
Marketa Jirouskova, Katerina Nepomucka, Gizem Oyman-Eyrilmez, Alzbeta Kalendova, Helena Havelkova, Lenka Sarnova, Karel Chalupsky, Bjoern Schuster, Oldrich Benada, Petra Miksatkova, Martin Kuchar, Ondrej Fabian, Radislav Sedlacek, Gerhard Wiche, Martin Gregor
BACKGROUND & AIMS: Plectin, a highly versatile cytolinker protein, controls intermediate filament (IF) cytoarchitecture and cellular stress response. In the present study, we investigate the role of plectin in the liver under basal conditions and in experimental cholestasis. METHODS: We generated liver-specific Plectin knockout (PleΔalb) mice and analyzed them using two cholestatic liver injury models: bile duct ligation (BDL) and 3,5-diethoxycarbonyl-1,4-dihydrocollidine (DDC) feeding...
December 19, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/29234272/differential-roles-of-glycogen-synthase-kinase-3-subtypes-alpha-and-beta-in-cortical-development
#7
Yan-Xia Ma, Xiu-Li Wang, Jian-Quan Chen, Bin Li, Eun-Mi Hur, Saijilafu
Glycogen synthase kinases 3 (GSK3) α and β are expressed in the nervous system, and disruption of GSK3 signaling has been implicated in a wide range of neurodevelopmental and psychiatric disorders. Although several studies have established a role of GSK3 signaling in the nervous system, much less is known about isoform-specific functions. Here, we have examined the role of GSK3α and GSK3β in the developing neocortex by performing in utero electroporation with specific small interfering RNAs targeting each isoform...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29225342/differentiation-dynamics-of-mammary-epithelial-cells-revealed-by-single-cell-rna%C3%A2-sequencing
#8
Karsten Bach, Sara Pensa, Marta Grzelak, James Hadfield, David J Adams, John C Marioni, Walid T Khaled
Characterising the hierarchy of mammary epithelial cells (MECs) and how they are regulated during adult development is important for understanding how breast cancer arises. Here we report the use of single-cell RNA sequencing to determine the gene expression profile of MECs across four developmental stages; nulliparous, mid gestation, lactation and post involution. Our analysis of 23,184 cells identifies 15 clusters, few of which could be fully characterised by a single marker gene. We argue instead that the epithelial cells-especially in the luminal compartment-should rather be conceptualised as being part of a continuous spectrum of differentiation...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29194577/cerebral-cortex-development-an-outside-in-perspective
#9
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
#10
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/29191977/the-tumor-suppressor-brat-controls-neuronal-stem-cell-lineages-by-inhibiting-deadpan-and-zelda
#11
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/29183988/development-and-differentiation-of-early-innate-lymphoid-progenitors
#12
Christelle Harly, Maggie Cam, Jonathan Kaye, Avinash Bhandoola
Early innate lymphoid progenitors (EILPs) have recently been identified in mouse adult bone marrow as a multipotential progenitor population specified toward innate lymphoid cell (ILC) lineages, but their relationship with other described ILC progenitors is still unclear. In this study, we examine the progenitor-successor relationships between EILPs, all-lymphoid progenitors (ALPs), and ILC precursors (ILCps). Functional, bioinformatic, phenotypical, and genetic approaches collectively establish EILPs as an intermediate progenitor between ALPs and ILCps...
November 28, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29183944/clones-of-cells-switch-from-reduction-to-enhancement-of-size-variability-in-arabidopsis-sepals
#13
Satoru Tsugawa, Nathan Hervieux, Daniel Kierzkowski, Anne-Lise Routier-Kierzkowska, Aleksandra Sapala, Olivier Hamant, Richard S Smith, Adrienne H K Roeder, Arezki Boudaoud, Chun-Biu Li
Organs form with remarkably consistent sizes and shapes during development, whereas a high variability in growth is observed at the cell level. Given this contrast, it is unclear how such consistency in organ scale can emerge from cellular behavior. Here, we examine an intermediate scale, the growth of clones of cells in Arabidopsis sepals. Each clone consists of the progeny of a single progenitor cell. At early stages, we find that clones derived from a small progenitor cell grow faster than those derived from a large progenitor cell...
December 1, 2017: Development
https://www.readbyqxmd.com/read/29173895/mode-of-surgical-injury-influences-the-source-of-urothelial-progenitors-during-bladder-defect-repair
#14
Frank-Mattias Schäfer, Khalid Algarrahi, Alyssa Savarino, Xuehui Yang, Catherine Seager, Debra Franck, Kyle Costa, Shanshan Liu, Tanya Logvinenko, Rosalyn Adam, Joshua R Mauney
The bladder urothelium functions as a urine-blood barrier and consists of basal, intermediate, and superficial cell populations. Reconstructive procedures such as augmentation cystoplasty and focal mucosal resection involve localized surgical damage to the bladder wall whereby focal segments of the urothelium and underlying submucosa are respectively removed or replaced and regeneration ensues. We demonstrate using lineage-tracing systems that urothelial regeneration following augmentation cystoplasty with acellular grafts exclusively depends on host keratin 5-expressing basal cells to repopulate all lineages of the de novo urothelium at implant sites...
November 17, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/29158510/construction-of-developmental-lineage-relationships-in-the-mouse-mammary-gland-by-single-cell-rna-profiling
#15
Bhupinder Pal, Yunshun Chen, François Vaillant, Paul Jamieson, Lavinia Gordon, Anne C Rios, Stephen Wilcox, Naiyang Fu, Kevin He Liu, Felicity C Jackling, Melissa J Davis, Geoffrey J Lindeman, Gordon K Smyth, Jane E Visvader
The mammary epithelium comprises two primary cellular lineages, but the degree of heterogeneity within these compartments and their lineage relationships during development remain an open question. Here we report single-cell RNA profiling of mouse mammary epithelial cells spanning four developmental stages in the post-natal gland. Notably, the epithelium undergoes a large-scale shift in gene expression from a relatively homogeneous basal-like program in pre-puberty to distinct lineage-restricted programs in puberty...
November 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/29158446/drosophila-embryonic-type-ii-neuroblasts-origin-temporal-patterning-and-contribution-to-the-adult-central-complex
#16
Kathleen T Walsh, Chris Q Doe
Drosophila neuroblasts are an excellent model for investigating how neuronal diversity is generated. Most brain neuroblasts generate a series of ganglion mother cells (GMCs) that each make two neurons (type I lineage), but sixteen brain neuroblasts generate a series of intermediate neural progenitors (INPs) that each produce 4-6 GMCs and 8-12 neurons (type II lineage). Thus, type II lineages are similar to primate cortical lineages, and may serve as models for understanding cortical expansion. Yet the origin of type II neuroblasts remains mysterious: do they form in the embryo or larva? If they form in the embryo, do their progeny populate the adult central complex, as do the larval type II neuroblast progeny? Here we present molecular and clonal data showing that all type II neuroblasts form in the embryo, produce INPs, and express known temporal transcription factors...
November 20, 2017: Development
https://www.readbyqxmd.com/read/29158085/generation-of-branching-ureteric-bud-tissues-from-human-pluripotent-stem-cells
#17
Shin-Ichi Mae, Makoto Ryosaka, Taro Toyoda, Kyoko Matsuse, Yoichi Oshima, Hiraku Tsujimoto, Shiori Okumura, Aya Shibasaki, Kenji Osafune
Recent progress in kidney regeneration research is noteworthy. However, the selective and robust differentiation of the ureteric bud (UB), an embryonic renal progenitor, from human pluripotent stem cells (hPSCs) remains to be established. The present study aimed to establish a robust induction method for branching UB tissue from hPSCs towards the creation of renal disease models. Here, we found that anterior intermediate mesoderm (IM) differentiates from anterior primitive streak, which allowed us to successfully develop an efficient two-dimensional differentiation method of hPSCs into Wolffian duct (WD) cells...
January 1, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29130118/sox10-positive-cells-emerge-in-the-rat-pituitary-gland-during-late-embryogenesis-and-start-to-express-s100%C3%AE
#18
Hiroki Ueharu, Saishu Yoshida, Naoko Kanno, Kotaro Horiguchi, Naoto Nishimura, Takako Kato, Yukio Kato
In the pituitary gland, S100β-positive cells localize in the neurohypophysis and adenohypophysis but the lineage of the two groups remains obscure. S100β is often observed in many neural crest-derived cell types. Therefore, in this study, we investigate the origin of pituitary S100β-positive cells by immunohistochemistry for SOX10, a potent neural crest cell marker, using S100β-green fluorescence protein-transgenic rats. On embryonic day 21.5, a SOX10-positive cell population, which was also positive for the stem/progenitor cell marker SOX2, emerged in the pituitary stalk and posterior lobe and subsequently expanded to create a rostral-caudal gradient on postnatal day 3 (P3)...
November 13, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29109083/activated-hedgehog-gli-signaling-causes-congenital-ureteropelvic-junction-obstruction
#19
Sepideh Sheybani-Deloui, Lijun Chi, Marian V Staite, Jason E Cain, Brain J Nieman, R Mark Henkelman, Brandon J Wainwright, S Steven Potter, Darius J Bagli, Armando J Lorenzo, Norman D Rosenblum
Intrinsic ureteropelvic junction obstruction is the most common cause of congenital hydronephrosis, yet the underlying pathogenesis is undefined. Hedgehog proteins control morphogenesis by promoting GLI-dependent transcriptional activation and inhibiting the formation of the GLI3 transcriptional repressor. Hedgehog regulates differentiation and proliferation of ureteric smooth muscle progenitor cells during murine kidney-ureter development. Histopathologic findings of smooth muscle cell hypertrophy and stroma-like cells, consistently observed in obstructing tissue at the time of surgical correction, suggest that Hedgehog signaling is abnormally regulated during the genesis of congenital intrinsic ureteropelvic junction obstruction...
November 6, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29093521/zika-virus-infects-intermediate-progenitor-cells-and-post-mitotic-committed-neurons-in-human-fetal-brain-tissues
#20
Ming-Yi Lin, Yi-Ling Wang, Wan-Lin Wu, Victoria Wolseley, Ming-Ting Tsai, Vladimir Radic, Matthew E Thornton, Brendan H Grubbs, Robert H Chow, I-Chueh Huang
Zika virus (ZIKV) infection is associated with microcephaly in fetuses, but the pathogenesis of ZIKV-related microcephaly is not well understood. Here we show that ZIKV infects the subventricular zone in human fetal brain tissues and that the tissue tropism broadens with the progression of gestation. Our research demonstrates also that intermediate progenitor cells (IPCs) are the main target cells for ZIKV. Post-mitotic committed neurons become susceptible to ZIKV infection as well at later stages of gestation...
November 1, 2017: Scientific Reports
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