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Hematopoietic niche

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https://www.readbyqxmd.com/read/28098778/bone-niches-hematopoietic-stem-cells-and-vessel-formation
#1
REVIEW
Roberto Tamma, Domenico Ribatti
Bone marrow (BM) is a source of hematopoietic stem cells (HSCs). HSCs are localized in both the endosteum, in the so-called endosteal niche, and close to thin-walled and fenestrated sinusoidal vessel in the center of BM, in the so-called vascular niche. HSCs give rise to all types of mature blood cells through a process finely controlled by numerous signals emerging from the bone marrow niches where HSCs reside. This review will focus on the description of the role of BM niches in the control of the fate of HSCs and will also highlight the role of the BM niches in the regulation of vasculogenesis and angiogenesis...
January 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28090484/mesenchymal-stromal-cells-in-myeloid-malignancies
#2
REVIEW
Thomas Schroeder, Stefanie Geyh, Ulrich Germing, Rainer Haas
Myelodysplastic syndromes (MDS) and acute myeloid leukemia (AML) are clonal myeloid disorders characterized by hematopoietic insufficiency. As MDS and AML are considered to originate from genetic and molecular defects of hematopoietic stem and progenitor cells (HSPC), the main focus of research in this field has focused on the characterization of these cells. Recently, the contribution of BM microenvironment to the pathogenesis of myeloid malignancies, in particular MDS and AML has gained more interest. This is based on a better understanding of its physiological role in the regulation of hematopoiesis...
December 2016: Blood Research
https://www.readbyqxmd.com/read/28088984/the-aging-hematopoietic-stem-cell-niche-phenotypic-and-functional-changes-and-mechanisms-that-contribute-to-hematopoietic-aging
#3
REVIEW
Sarah E Latchney, Laura M Calvi
The hematopoietic system has the remarkable ability to provide a lifelong supply of mature cells that make up the entire blood and immune system. However, similar to other adult stem cell niches, the hematopoietic system is vulnerable to the detrimental effects of aging. This is a substantial health concern as the trend for population aging continues to increase. Identifying mechanisms that underlie hematopoietic aging is vital for understanding hematopoietic-related diseases. In this review, we first discuss the cellular hierarchy of the hematopoietic system and the components that make up the surrounding hematopoietic niche...
January 2017: Seminars in Hematology
https://www.readbyqxmd.com/read/28078190/loss-of-quiescence-and-self-renewal-capacity-of-hematopoietic-stem-cell-in-an-in-vitro-leukemic-niche
#4
Natalia-Del Pilar Vanegas, Jean-Paul Vernot
BACKGROUND: Leukemic and mesenchymal stem cells interact in the leukemic microenvironment and affect each other differently. This interplay has also important implications for the hematopoietic stem cell (HSC) biology and function. This study evaluated human HSC self-renewal potential and quiescence in an in vitro leukemic niche without leukemic cells. METHODS: A leukemic niche was established by co-culturing mesenchymal stem cells with a fresh conditioned medium obtained from a leukemic (REH) cell line...
2017: Experimental Hematology & Oncology
https://www.readbyqxmd.com/read/28070554/marrow-inspired-matrix-cues-rapidly-affect-early-fate-decisions-of-hematopoietic-stem-and-progenitor-cells
#5
Ji Sun Choi, Brendan A C Harley
Hematopoiesis is the physiological process where hematopoietic stem cells (HSCs) continuously generate the body's complement of blood and immune cells within unique regions of the bone marrow termed niches. Although previous investigations have revealed gradients in cellular and extracellular matrix (ECM) content across the marrow, and matrix elasticity and ligand type are believed to be strong regulators of stem cell fate, the impact of biophysical signals on HSC response is poorly understood. Using marrow-inspired ECM ligand-coated polyacrylamide substrates that present defined stiffness and matrix ligand cues, we demonstrate that the interplay between integrin engagement and myosin II activation processes affects the morphology, proliferation, and myeloid lineage specification of primary murine HSCs within 24 hours ex vivo...
January 2017: Science Advances
https://www.readbyqxmd.com/read/28068510/current-knowledge-and-priorities-for-future-research-in-late-effects-after-hematopoietic-stem-cell-transplantation-hct-for-severe-combined-immunodeficiency-patients-a-consensus-statement-from-the-second-pediatric-blood-and-marrow-transplant-consortium-international
#6
REVIEW
Jennifer Heimall, Jennifer Puck, Rebecca Buckley, Thomas A Fleisher, Andrew R Gennery, Benedicte Neven, Mary Slatter, Elie Haddad, Luigi D Notarangelo, K Scott Baker, Andrew C Dietz, Christine Duncan, Michael A Pulsipher, Mort J Cowan
Severe combined immunodeficiency (SCID) is 1 of the most common indications for pediatric hematopoietic cell transplantation (HCT) in patients with primary immunodeficiency. Historically, SCID was diagnosed in infants who presented with opportunistic infections within the first year of life. With newborn screening (NBS) for SCID in most of the United States, the majority of infants with SCID are now diagnosed and treated in the first 3.5 months of life; however, in the rest of the world, the lack of NBS means that most infants with SCID still present with infections...
January 6, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28067666/versatile-humanized-niche-model-enables-study-of-normal-and-malignant-human-hematopoiesis
#7
Ander Abarrategi, Katie Foster, Ashley Hamilton, Syed A Mian, Diana Passaro, John Gribben, Ghulam Mufti, Dominique Bonnet
The BM niche comprises a tightly controlled microenvironment formed by specific tissue and cells that regulates the behavior of hematopoietic stem cells (HSCs). Here, we have provided a 3D model that is tunable in different BM niche components and useful, both in vitro and in vivo, for studying the maintenance of normal and malignant hematopoiesis. Using scaffolds, we tested the capacity of different stromal cell types to support human HSCs. Scaffolds coated with human mesenchymal stromal cells (hMSCs) proved to be superior in terms of HSC engraftment and long-term maintenance when implanted in vivo...
January 9, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28064238/myeloid-malignancies-and-the-microenvironment
#8
Claudia Korn, Simón Méndez-Ferrer
Research in the last few years has revealed a sophisticated interaction network between multiple bone marrow (BM) cells that regulate different hematopoietic stem cell (HSC) properties, such as proliferation, differentiation, localization and self-renewal during homeostasis. These mechanisms are essential to keep the physiological HSC numbers in check and interfere with malignant progression. Besides the identification of multiple mutations and chromosomal aberrations driving the progression of myeloid malignancies, alterations in the niche compartment recently gained attention in contributing to disease progression...
November 15, 2016: Blood
https://www.readbyqxmd.com/read/28046053/human-and-mouse-hematopoietic-stem-cells-are-a-depot-for-dormant-mycobacterium-tuberculosis
#9
Julia Tornack, Stephen T Reece, Wolfgang M Bauer, Alexis Vogelzang, Silke Bandermann, Ulrike Zedler, Georg Stingl, Stefan H E Kaufmann, Fritz Melchers
An estimated third of the world's population is latently infected with Mycobacterium tuberculosis (Mtb), with no clinical signs of tuberculosis (TB), but lifelong risk of reactivation to active disease. The niches of persisting bacteria during latent TB infection remain unclear. We detect Mtb DNA in peripheral blood selectively in long-term repopulating pluripotent hematopoietic stem cells (LT-pHSCs) as well as in mesenchymal stem cells from latently infected human donors. In mice infected with low numbers of Mtb, that do not develop active disease we, again, find LT-pHSCs selectively infected with Mtb...
2017: PloS One
https://www.readbyqxmd.com/read/28030562/heterogeneous-niche-activity-of-ex-vivo-expanded-mscs-as-factor-for-variable-outcomes-in-hematopoietic-recovery
#10
Jung-Ho Kim, Ho-Sun Lee, Hyun-Kyung Choi, Jin-A Kim, In-Sun Chu, Sun-Hee Leem, Il-Hoan Oh
Ex-vivo expanded mesenchymal stromal cells (MSCs) are increasingly used for paracrine support of hematopoietic stem cell (HSC) regeneration, but inconsistent outcomes have hindered ongoing clinical trials. Here, we show that significant heterogeneity in the niche activity of MSCs is created during their culture in various serum-supplemented media. The MSCs cultured under stimulatory or non-stimulatory culture conditions exhibited differences in colony forming unit-fibroblast contents, expression levels of cross-talk molecules (Jagged-1 and CXCL-12) and their support for HSC self-renewal...
2016: PloS One
https://www.readbyqxmd.com/read/28026131/sphingosine-1-phosphate-receptor-3-supports-hematopoietic-stem-and-progenitor-cell-residence-within-the-bone-marrow-niche
#11
Molly E Ogle, Claire E Olingy, Anthony O Awojoodu, Anusuya Das, Rafael A Ortiz, Hoi Yin Cheung, Edward A Botchwey
Hematopoietic stem and progenitor cells (HSPCs) egress from bone marrow (BM) during homeostasis and at increased rates during stress; however, the mechanisms regulating their trafficking remain incompletely understood. Here we describe a novel role for lipid receptor, sphingosine-1-phosphate receptor 3 (S1PR3), in HSPC residence within the BM niche. HSPCs expressed increased levels of S1PR3 compared to differentiated BM cells. Pharmacological antagonism or knockout (KO) of S1PR3 mobilized HSPCs into blood circulation, suggesting that S1PR3 influences niche localization...
December 27, 2016: Stem Cells
https://www.readbyqxmd.com/read/28026128/ets-transcription-factor-etv2-er71-etsrp-in-hematopoietic-and-vascular-development-injury-and-regeneration
#12
REVIEW
Haiyong Zhao, Canxin Xu, Taejin Lee, Fang Liu, Kyunghee Choi
The major goal in regenerative medicine is to repair and restore injured, diseased or aged tissue function, thereby promoting general health. As such, the field of regenerative medicine has great translational potential in undertaking many of the health concerns and needs that we currently face. In particular, hematopoietic and vascular systems supply oxygen and nutrients and thus play critical roles in tissue development and tissue regeneration. Additionally, tissue vasculature serves as a tissue stem cell niche and thus contributes to tissue homeostasis...
December 27, 2016: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28024466/-role-of-nf-%C3%AE%C2%BAb-inhibitor-in-acute-myeloid-leukemia
#13
Wei-Li Wang, Qiao-Zhu Xu, Xiao-Huan Mu, Le Wang, Li-Yan Zhang, Jing Xu, Ying-Dai Gao, Tao Cheng, Wei-Ping Yuan
OBJECTIVE: To investigate the role of NF-κB inhibitor in occurence and development of AML. METHODS: AML and normal bone marrow samples were collected from 8 AML patients and 8 normal persons. The expression of NF-κB signaling pathway genes was detected by NF-κB PCR array. Then, AML mouse model was constructed to test the role of NF-κB inhibitor in AML. RESULTS: The NF-κB signal pathway was activated in AML patients. The up-regulated genes, EDARADD, TNFSF14, could activate the NF-κB signal pathway, IL6 could regulate the inflammatory signal...
December 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28017869/endosteal-like-extracellular-matrix-expression-on-melt-electrospun-written-scaffolds
#14
Maria Lourdes Muerza-Cascante, Ali Shokoohmand, Kiarash Khosrotehrani, David Haylock, Paul D Dalton, Dietmar W Hutmacher, Daniela Loessner
: Tissue engineering technology platforms constitute a unique opportunity to integrate cells and extracellular matrix (ECM) proteins into scaffolds and matrices that mimic the natural microenvironments in vitro. The developments of tissue-engineered 3D models that mimic the endosteal microenvironment enable researchers to discover the causes and improve treatments for blood and immune-related diseases. The aim of this study was to establish a physiologically relevant in vitro model using 3D printed scaffolds to assess the contribution of human cells to the formation of a construct that mimics human endosteum...
December 22, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/28009288/engineered-murine-hscs-reconstitute-multi-lineage-hematopoiesis-and-adaptive-immunity
#15
Yi-Fen Lu, Patrick Cahan, Samantha Ross, Julie Sahalie, Patricia M Sousa, Brandon K Hadland, Wenqing Cai, Erik Serrao, Alan N Engelman, Irwin D Bernstein, George Q Daley
Hematopoietic stem cell (HSC) transplantation is curative for malignant and genetic blood disorders, but is limited by donor availability and immune-mismatch. Deriving HSCs from patient-matched embryonic/induced-pluripotent stem cells (ESCs/iPSCs) could address these limitations. Prior efforts in murine models exploited ectopic HoxB4 expression to drive self-renewal and enable multi-lineage reconstitution, yet fell short in delivering robust lymphoid engraftment. Here, by titrating exposure of HoxB4-ESC-HSC to Notch ligands, we report derivation of engineered HSCs that self-renew, repopulate multi-lineage hematopoiesis in primary and secondary engrafted mice, and endow adaptive immunity in immune-deficient recipients...
December 20, 2016: Cell Reports
https://www.readbyqxmd.com/read/28007480/paternal-insulin-like-growth-factor-2-igf2-regulates-stem-cell-activity-during-adulthood
#16
Vilma Barroca, Daniel Lewandowski, Agnieszka Jaracz-Ros, Sylvie-Nathalie Hardouin
Insulin-like Growth Factor 2 (IGF2) belongs to the IGF/Insulin pathway, a highly conserved evolutionarily network that regulates growth, aging and lifespan. Igf2 is highly expressed in the embryo and in cancer cells. During mouse development, Igf2 is expressed in all sites where hematopoietic stem cells (HSC) successively expand, then its expression drops at weaning and becomes undetectable when adult HSC have reached their niches in bones and start to self-renew. In the present study, we aim to discover the role of IGF2 during adulthood...
February 2017: EBioMedicine
https://www.readbyqxmd.com/read/28004388/lcn2-overexpression-in-bone-enhances-the-hematopoietic-compartment-via-modulation-of-the-bone-marrow-microenvironment
#17
Delfina Costa, Elisa Principi, Edoardo Lazzarini, Fiorella Descalzi, Ranieri Cancedda, Patrizio Castagnola, Sara Tavella
Lipocalin-2 (LCN2) is a member of the lipocalin family whose expression is modulated in several conditions, including cell differentiation, innate immunity, stress and cancer. Although it is known that it is expressed in bone, its function in this tissue remains poorly studied. To this end, we took advantage of transgenic mice lines that expressed LCN2 driven by a bone specific type I collagen (LCN2-Tg). In the bone marrow (BM) of LCN2-Tg mice we observed an increased number of phenotypically long-term hematopoietic stem cells (LT-HSC) that also displayed a higher proliferation rate compared to wild type controls (Wt)...
December 22, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28002722/one-niche-to-rule-both-maintenance-and-loss-of-stemness-in-hscs
#18
Motonari Kondo
Hemato-lymphopoiesis initiated by hematopoietic stem cells (HSCs) is tightly regulated by factors present in the bone marrow (BM) niche. Using genetically modified mice, Gomes et al. (2016) show that IL-7 is produced by HSC niche-forming cells and find that the same niche that controls HSC self-renewal can also support differentiation.
December 20, 2016: Immunity
https://www.readbyqxmd.com/read/28000662/hematopoietic-stem-cells-in-neural-crest-derived-bone-marrow
#19
Nan Jiang, Mo Chen, Guodong Yang, Lusai Xiang, Ling He, Thomas K Hei, Gregory Chotkowski, Dennis P Tarnow, Myron Finkel, Lei Ding, Yanheng Zhou, Jeremy J Mao
Hematopoietic stem cells (HSCs) in the endosteum of mesoderm-derived appendicular bones have been extensively studied. Neural crest-derived bones differ from appendicular bones in developmental origin, mode of bone formation and pathological bone resorption. Whether neural crest-derived bones harbor HSCs is elusive. Here, we discovered HSC-like cells in postnatal murine mandible, and benchmarked them with donor-matched, mesoderm-derived femur/tibia HSCs, including clonogenic assay and long-term culture. Mandibular CD34 negative, LSK cells proliferated similarly to appendicular HSCs, and differentiated into all hematopoietic lineages...
December 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27998927/niche-wnt5a-regulates-the-actin-cytoskeleton-during-regeneration-of-hematopoietic-stem-cells
#20
Christina Schreck, Rouzanna Istvánffy, Christoph Ziegenhain, Theresa Sippenauer, Franziska Ruf, Lynette Henkel, Florian Gärtner, Beate Vieth, M Carolina Florian, Nicole Mende, Anna Taubenberger, Áine Prendergast, Alina Wagner, Charlotta Pagel, Sandra Grziwok, Katharina S Götze, Jochen Guck, Douglas C Dean, Steffen Massberg, Marieke Essers, Claudia Waskow, Hartmut Geiger, Mathias Schiemann, Christian Peschel, Wolfgang Enard, Robert A J Oostendorp
Here, we show that the Wnt5a-haploinsufficient niche regenerates dysfunctional HSCs, which do not successfully engraft in secondary recipients. RNA sequencing of the regenerated donor Lin(-) SCA-1(+) KIT(+) (LSK) cells shows dysregulated expression of ZEB1-associated genes involved in the small GTPase-dependent actin polymerization pathway. Misexpression of DOCK2, WAVE2, and activation of CDC42 results in apolar F-actin localization, leading to defects in adhesion, migration and homing of HSCs regenerated in a Wnt5a-haploinsufficient microenvironment...
January 2017: Journal of Experimental Medicine
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