keyword
MENU ▼
Read by QxMD icon Read
search

Hematopoietic niche

keyword
https://www.readbyqxmd.com/read/29157935/a-quiet-space-during-rush-hour-quiescence-in-primordial-germ-cells
#1
Nathalie Oulhen, Gary Wessel
Quiescence is a common character in stem cells. Low cellular activity in these cells may function to minimize the potential damaging effects of oxidative stress, reduce the number of cells needed for tissue replenishment, and as a consequence, perhaps occupy unique niches. Quiescent stem cells are found in many adult human tissues, the hematopoietic stem cells are paradigmatic, and more recently it appears that stem cell of the germ line in many animals display quiescence characters. Here we explore the diversity of quiescence phenotypes in primordial germ cells, leveraging the diverse mechanisms of germ cell formation to extract evolutionary significance to common processes...
November 7, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29141946/age-related-clonal-hematopoiesis-arch
#2
Liran I Shlush
Age related alterations in the human blood system occur in B cells, T cells, cells of the innate system, as well as in hematopoietic stem and progenitor cells (HSPCs). Interestingly, age related, reduced genetic diversity can be identified both at the stem cell level, but also independently in B cells and T cells. This reduced diversity is most probably related to somatic mutations, or to changes in the micro-environmental niche. Either process can select for specific clones, or cause repeated evolutionary bottlenecks...
November 15, 2017: Blood
https://www.readbyqxmd.com/read/29141868/geographic-clonal-tracking-in-macaques-provides-insights-into-hspc-migration-and-differentiation
#3
Chuanfeng Wu, Diego A Espinoza, Samson J Koelle, E Lake Potter, Rong Lu, Brian Li, Di Yang, Xing Fan, Robert E Donahue, Mario Roederer, Cynthia E Dunbar
The geographic distribution of hematopoiesis at a clonal level is of interest in understanding how hematopoietic stem and progenitor cells (HSPCs) and their progeny interact with bone marrow (BM) niches during regeneration. We tagged rhesus macaque autologous HSPCs with genetic barcodes, allowing clonal tracking over time and space after transplantation. We found marked geographic segregation of CD34(+) HSPCs for at least 6 mo posttransplantation, followed by very gradual clonal mixing at different BM sites over subsequent months to years...
November 15, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29137406/the-forkhead-box-c1-foxc1-transcription-factor-is-downregulated-in-acute-promyelocytic-leukemia
#4
Emiliano Fabiani, Giulia Falconi, Nélida Inés Noguera, Ernestina Saulle, Laura Cicconi, Mariadomenica Divona, Cristina Banella, Alessandra Picardi, Anna Maria Cerio, Letizia Boe, Massimo Sanchez, Elvira Pelosi, Ugo Testa, Francesco Lo-Coco, Maria Teresa Voso
Forkhead box (FOX) genes encode transcription factors, which regulate embryogenesis and play an important role in hematopoietic differentiation and in mesenchymal niche maintenance. Overexpression of the family member FOXC1 has been reported in solid tumors and acute myeloid leukemia (AML). We studied FOXC1 expression and function in acute promyelocytic leukemia (APL) and normal hematopoietic progenitors. FOXC1 mRNA and protein levels were significantly lower in primary marrow samples from 27 APL patients, as compared to samples obtained from 27 patients with other AML subtypes, and 5 normal CD34+ hematopoietic cells...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29132746/diabetes-mellitus-as-a-poor-mobilizer-condition
#5
REVIEW
Gian Paolo Fadini, John F DiPersio
Hematopoietic stem cell (HSC) transplantation in an effective and curative therapy for numerous hematological malignancies. Mobilization of HSCs from bone marrow (BM) to peripheral blood (PB) followed by apheresis is the gold standard for obtaining HSCs for both autologous and allogeneic stem cell transplantation. After administration of granulocyte-colony stimulating factor (G-CSF), up to 30% of patients fail to mobilize "optimal" numbers of HSCs required for engraftment. This review summarizes the current experimental and clinical evidence that diabetes mellitus is a risk factor for poor mobilization...
November 8, 2017: Blood Reviews
https://www.readbyqxmd.com/read/29118813/the-leukemic-stem-cell-niche-adaptation-to-hypoxia-versus-oncogene-addiction
#6
Giulia Cheloni, Martina Poteti, Silvia Bono, Erico Masala, Nathalie M Mazure, Elisabetta Rovida, Matteo Lulli, Persio Dello Sbarba
Previous studies based on low oxygen concentrations in the incubation atmosphere revealed that metabolic factors govern the maintenance of normal hematopoietic or leukemic stem cells (HSC and LSC). The physiological oxygen concentration in tissues ranges between 0.1 and 5.0%. Stem cell niches (SCN) are placed in tissue areas at the lower end of this range ("hypoxic" SCN), to which stem cells are metabolically adapted and where they are selectively hosted. The data reported here indicated that driver oncogenic proteins of several leukemias are suppressed following cell incubation at oxygen concentration compatible with SCN physiology...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29113449/where-hematopoietic-stem-cells-live-the-bone-marrow-niche
#7
Krzysztof Tomasz Szade, Gunsagar Singh Gulati, Charles K F Chan, Kevin S Kao, Masanori Miyanishi, Kristopher Marjon, Rahul Sinha, Benson George, James Y Chen, Irving Weissman
Hematopoietic stem cells (HSCs) can sustain the production of blood throughout one's lifetime. However, for proper self-renewal of its own population and differentiation to blood, the HSC requires a specialized microenvironment called the "niche". Recent Advances: Recent studies using novel mouse models have shed new light on the cellular architecture and function of the HSC niche. Here, we review the different cells that constitute the HSC niche and the molecular mechanisms that underlie HSC and niche interaction...
November 7, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29105864/study-of-bone-metabolism-and-angiogenesis-in-patients-undergoing-high-dose-chemotherapy-autologous-hematopoietic-stem-cell-transplantation
#8
Georgios Boutsikas, Evangelos Terpos, Athanasios Papatheodorou, Pantelis Tsirkinidis, Panayiotis Tsirigotis, Anastasia Meletiou, Eleni Lalou, Vasileios Telonis, Anna Zannou, Alexander Kanellopoulos, Zacharoula Galani, Angeliki Stefanou, Panayiotis Tsaftaridis, Nora-Athina Viniou, Panayiotis Panayiotidis, Marie-Christine Kyrtsonis, John Meletis, Theodoros P Vassilakopoulos, Maria K Angelopoulou
OBJECTIVES: Since the interaction between Hematopoietic Stem Cells (HSCs) and endosteal and endothelial niches in HSCs homing is essential, we aimed to study bone turnover and angiogenesis in 29 patients with lymphoma/multiple myeloma undergoing Hematopoietic Stem Cell Transplantation (HSCT). METHODS: Serum samples were collected before High Dose Chemotherapy (HDT), at the end of HDT, after HSC infusion, at the nadir of myelotoxicity and at engraftment. Bone metabolism (CTX, TRACP-5b, bALP, OC, DKK1, RANKL, OPG) and angiogenesis (Ang1, Ang2) markers were measured...
November 6, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/29101431/the-emerging-role-of-bone-marrow-adipose-tissue-in-bone-health-and-dysfunction
#9
REVIEW
Thomas H Ambrosi, Tim J Schulz
Replacement of red hematopoietic bone marrow with yellow adipocyte-rich marrow is a conserved physiological process among mammals. The extent of this conversion is influenced by a wide array of pathological and non-pathological conditions. Of particular interest is the observation that some marrow adipocyte-inducing factors seem to oppose each other, for instance obesity and caloric restriction. Intriguingly, several important molecular characteristics of bone marrow adipose tissue (BMAT) are distinct from the classical depots of white and brown fat tissue...
December 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/29098141/the-osteoblastic-niche-in-hematopoiesis-and-hematological-myeloid-malignancies
#10
Marta Galán-Díez, Stavroula Kousteni
Purpose of review: This review focuses on evidence highlighting the bidirectional crosstalk between the hematopoietic stem cell (HSC) and their surrounding stromal cells, with a particular emphasis on cells of the osteoblast lineage. The role and molecular functions of osteoblasts in normal hematopoiesis and in myeloid hematological malignancies is discussed. Recent findings: Cells of the osteoblast lineage have emerged as potent regulators of HSC expansion that regulate their recruitment and, depending on their stage of differentiation, their activity, proliferation and differentiation along the lymphoid, myeloid and erythroid lineages...
June 2017: Current Molecular Biology Reports
https://www.readbyqxmd.com/read/29093266/macrophage-derived-oncostatin-m-contributes-to-human-and-mouse-neurogenic-heterotopic-ossifications
#11
Frédéric Torossian, Bernadette Guerton, Adrienne Anginot, Kylie A Alexander, Christophe Desterke, Sabrina Soave, Hsu-Wen Tseng, Nassim Arouche, Laetitia Boutin, Irina Kulina, Marjorie Salga, Beulah Jose, Allison R Pettit, Denis Clay, Nathalie Rochet, Erica Vlachos, Guillaume Genet, Charlotte Debaud, Philippe Denormandie, François Genet, Natalie A Sims, Sébastien Banzet, Jean-Pierre Levesque, Jean-Jacques Lataillade, Marie-Caroline Le Bousse-Kerdilès
Neurogenic heterotopic ossification (NHO) is the formation of ectopic bone generally in muscles surrounding joints following spinal cord or brain injury. We investigated the mechanisms of NHO formation in 64 patients and a mouse model of spinal cord injury-induced NHO. We show that marrow from human NHOs contains hematopoietic stem cell (HSC) niches, in which mesenchymal stromal cells (MSCs) and endothelial cells provide an environment supporting HSC maintenance, proliferation, and differentiation. The transcriptomic signature of MSCs from NHOs shows a neuronal imprinting associated with a molecular network required for HSC support...
November 2, 2017: JCI Insight
https://www.readbyqxmd.com/read/29093060/a-molecular-roadmap-of-the-agm-region-reveals-bmper-as-a-novel-regulator-of-hsc-maturation
#12
Alison C McGarvey, Stanislav Rybtsov, Céline Souilhol, Sara Tamagno, Ritva Rice, David Hills, Duncan Godwin, David Rice, Simon R Tomlinson, Alexander Medvinsky
In the developing embryo, hematopoietic stem cells (HSCs) emerge from the aorta-gonad-mesonephros (AGM) region, but the molecular regulation of this process is poorly understood. Recently, the progression from E9.5 to E10.5 and polarity along the dorso-ventral axis have been identified as clear demarcations of the supportive HSC niche. To identify novel secreted regulators of HSC maturation, we performed RNA sequencing over these spatiotemporal transitions in the AGM region and supportive OP9 cell line. Screening several proteins through an ex vivo reaggregate culture system, we identify BMPER as a novel positive regulator of HSC development...
November 1, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29091025/reactive-oxygen-species-dependent-toll-nf-%C3%AE%C2%BAb-activation-in-the-drosophila-hematopoietic-niche-confers-resistance-to-wasp-parasitism
#13
Isabelle Louradour, Anurag Sharma, Ismael Morin-Poulard, Manon Letourneau, Alain Vincent, Michèle Crozatier, Nathalie Vanzo
Hematopoietic stem/progenitor cells in the adult mammalian bone marrow ensure blood cell renewal. Their cellular microenvironment, called 'niche', regulates hematopoiesis both under homeostatic and immune stress conditions. In the Drosophila hematopoietic organ, the lymph gland, the posterior signaling center (PSC) acts as a niche to regulate the hematopoietic response to immune stress such as wasp parasitism. This response relies on the differentiation of lamellocytes, a cryptic cell type, dedicated to pathogen encapsulation and killing...
November 1, 2017: ELife
https://www.readbyqxmd.com/read/29079596/erythropoietin-inhibits-osteoblast-function-in-myelodysplastic-syndromes-via-the-canonical-wnt-pathway
#14
Ekaterina Balaian, Manja Wobus, Heike Weidner, Ulrike Baschant, Maik Stiehler, Gerhard Ehninger, Martin Bornhäuser, Lorenz C Hofbauer, Martina Rauner, Uwe Platzbecker
The effects of erythropoietin on osteoblasts and bone formation are controversially discussed. Since patients with myelodysplastic syndromes often display excessively high erythropoietin level, we aimed to analyze the effect of erythropoietin on osteoblast function in myelodysplastic syndromes and define the role of Wnt signaling in this process. Expression of osteoblast-specific genes and subsequent osteoblasts mineralization was increased in mesenchymal stromal cells from healthy young donors by in vitro erythropoietin treatment...
October 27, 2017: Haematologica
https://www.readbyqxmd.com/read/29076088/analyzing-the-formation-morphology-and-integrity-of-erythroblastic-islands
#15
Jia Hao Yeo, Matthew P Cosgriff, Stuart T Fraser
The bone marrow is the primary site of erythropoiesis in healthy adult mammals. In the bone marrow, erythroid cells mature within specialized microenvironments termed erythroblastic islands (EBIs). EBIs are multi-cellular clusters comprised of a central macrophage surrounded by red blood cell (erythroid) progenitors. It has been proposed that the central macrophage functions as a "nurse-cell" providing iron, cytokines, and growth factors for the developing erythroid cells. The central macrophage also engulfs and destroys extruded erythroid nuclei...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29066511/a-subpopulation-of-stromal-cells-controls-cancer-cell-homing-to-the-bone-marrow
#16
Stephanie Rossnagl, Hiba Ghura, Christopher Groth, Eva Altrock, Franz Jakob, Sarah Schott, Pauline Wimberger, Theresa Link, Jan Dominik Kuhlmann, Arnulf Stenzl, Jörg Hennenlotter, Tilman Todenhöfer, Markus Rojewski, Karen Bieback, Inaam A Nakchbandi
Breast and prostate cancer cells home to the bone marrow where they presumably hijack the hematopoietic stem cell niche. We characterize here the elusive premetastatic niche by examining the role of mesenchymal stromal cells (MSC) in cancer cell homing. Decreasing the number of MSC pharmacologically enhanced cancer cell homing to the bone marrow in mice. In contrast, increasing the number of these MSC by various interventions including G-CSF administration diminished cancer cell homing. The MSC subpopulation that correlated best with cancer cells expressed stem, endothelial, and pericytic cell markers suggesting these cells represent an undifferentiated component of the niche with vascular commitment...
October 24, 2017: Cancer Research
https://www.readbyqxmd.com/read/29058691/endothelial-jagged-2-sustains-hematopoietic-stem-and-progenitor-reconstitution-after-myelosuppression
#17
Peipei Guo, Michael G Poulos, Brisa Palikuqi, Chaitanya R Badwe, Raphael Lis, Balvir Kunar, Bi-Sen Ding, Sina Y Rabbany, Koji Shido, Jason M Butler, Shahin Rafii
Angiocrine factors, such as Notch ligands, supplied by the specialized endothelial cells (ECs) within the bone marrow and splenic vascular niche play an essential role in modulating the physiology of adult hematopoietic stem and progenitor cells (HSPCs). However, the relative contribution of various Notch ligands, specifically jagged-2, to the homeostasis of HSPCs is unknown. Here, we show that under steady state, jagged-2 is differentially expressed in tissue-specific vascular beds, but its expression is induced in hematopoietic vascular niches after myelosuppressive injury...
October 23, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29056332/mouse-genetic-analysis-of-bone-marrow-stem-cell-niches-technological-pitfalls-challenges-and-translational-considerations
#18
REVIEW
Kevin G Chen, Kory R Johnson, Pamela G Robey
The development of mouse genetic tools has made a significant contribution to the understanding of skeletal and hematopoietic stem cell niches in bone marrow (BM). However, many experimental designs (e.g., selections of marker genes, target vector constructions, and choices of reporter murine strains) have unavoidable technological limitations and bias, which lead to experimental discrepancies, data reproducibility issues, and frequent data misinterpretation. Consequently, there are a number of conflicting views relating to fundamental biological questions, including origins and locations of skeletal and hematopoietic stem cells in the BM...
November 14, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/29050516/human-bone-marrow-mesenchymal-stromal-cell-derived-osteoblasts-promote-the-expansion-of-hematopoietic-progenitors-through-beta-catenin-and-notch-signaling-pathways
#19
Matthew Michalicka, Gavin Boisjoli, Suria Jahan, Owen Hovey, Emily Doxtator, Ahmad Abu-Khader, Roya Pasha, Nicolas Pineault
Coculture of hematopoietic stem cells (HSC) with primary stromal cells from HSC niches supports the maintenance and expansion of HSC and progenitors ex vivo. However, a major drawback is the availability of primary human samples for research and clinical applications. We investigated the use of in vitro derived osteoblasts as a new source of feeder cells and characterized the molecular pathways that mediate their growth promoting activities. First, we compared the growth and differentiation modulating activities of mesenchymal stromal cells (MSC)-derived osteoblasts (M-OST) to that of their undifferentiated precursor on umbilical cord blood (UCB) progenitors...
October 19, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/29030484/aubergine-and-pirnas-promote-germline-stem-cell-self-renewal-by-repressing-the-proto-oncogene-cbl
#20
Patricia Rojas-Ríos, Aymeric Chartier, Stéphanie Pierson, Martine Simonelig
PIWI proteins play essential roles in germ cells and stem cell lineages. In Drosophila, Piwi is required in somatic niche cells and germline stem cells (GSCs) to support GSC self-renewal and differentiation. Whether and how other PIWI proteins are involved in GSC biology remains unknown. Here, we show that Aubergine (Aub), another PIWI protein, is intrinsically required in GSCs for their self-renewal and differentiation. Aub needs to be loaded with piRNAs to control GSC self-renewal and acts through direct mRNA regulation...
November 2, 2017: EMBO Journal
keyword
keyword
17149
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"