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Sca1+ macrophages activate hematopoietic stem/progenitor cells upon bone marrow stress. [scRNA-Seq]

ABSTRACT: Although hematopoietic stem and progenitor cells (HSPCs) become activated in the cell-cycle status after chemotherapy to supply hematopoietic loss, the detailed mechanisms of activation remain unknown. Here we show that Sca1+ macrophages play a key role for bone marrow (BM) recovery through granulocyte-macrophage colony-stimulating factor (GM-CSF) secretion. By analyzing gene expression profiles of HSPCs lodged in 5-fluolouracil (5-FU)-treated mice, we found GM-CSF as a key proliferative signal. Sca1+ macrophages in BM after 5-FU treatment expressed high levels of GM-CSF. GM-CSF-knockout mice treated with 5-FU were lethal because of severe BM suppression. Up-regulation of Csf2 in Sca1+ macrophages by 5-FU was suppressed in MyD88-knockout mice, suggesting that TLR signaling via damage-associated molecular patterns caused by cell death is critical for up-regulation of Csf2. In 5-FU treated BM, majority of Sca1+ macrophages and transplanted HSPCs locate perivascular areas. These findings together indicate that Sca1+ macrophages induce HSPCs to proliferate through GM-CSF signaling in the stressed BM environments.

ORGANISM(S): Mus musculus

PROVIDER: GSE120112 | GEO | 2021/01/20

REPOSITORIES: GEO

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Sca1+ macrophages activate hematopoietic stem/progenitor cells upon bone marrow stress. [RNA-Seq]

Project description:Although hematopoietic stem and progenitor cells (HSPCs) become activated in the cell-cycle status after chemotherapy to supply hematopoietic loss, the detailed mechanisms of activation remain unknown. Here we show that Sca1+ macrophages play a key role for bone marrow (BM) recovery through granulocyte-macrophage colony-stimulating factor (GM-CSF) secretion. By analyzing gene expression profiles of HSPCs lodged in 5-fluolouracil (5-FU)-treated mice, we found GM-CSF as a key proliferative signal. Sca1+ macrophages in BM after 5-FU treatment expressed high levels of GM-CSF. GM-CSF-knockout mice treated with 5-FU were lethal because of severe BM suppression. Up-regulation of Csf2 in Sca1+ macrophages by 5-FU was suppressed in MyD88-knockout mice, suggesting that TLR signaling via damage-associated molecular patterns caused by cell death is critical for up-regulation of Csf2. In 5-FU treated BM, majority of Sca1+ macrophages and transplanted HSPCs locate perivascular areas. These findings together indicate that Sca1+ macrophages induce HSPCs to proliferate through GM-CSF signaling in the stressed BM environments.

2021-01-20 | GSE120111 | GEO

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Microarray analysis of WT bone marrow myeloid progenitors, BM cultured with GM-CSF and M-CSF, and monocytes treated with GM-CSF

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Proteome-wide diet-independent adipose tissue alterations link dendritic cells to 2-aminoadipoate associated insulin sensitivity.

Project description:Adipose tissue dysfunction in obese humans is associated with disrupted metabolic homeostasis, insulin resistance, and type 2 diabetes mellitus (T2DM). In a mouse model that has preserved insulin sensitivity despite increased adiposity, we used unbiased three-dimensional integration of proteome profiles, metabolic profiles, and gene regulatory networks to understand adipose tissue proteome-wide changes and their metabolic implications. Multiple-dimensional liquid chromatography tandem mass spectrometry and extended multiplexing TMT labeling (24 biological samples) was used to analyze proteomes of epididymal adipose tissues isolated from wildtype (Csf2+/+) and GM-CSF driven dendritic cell deficient (Csf2-/-) mice that were fed low fat, high fat, or high fat plus cholesterol diets for 8 weeks. The peripheral metabolic health (as measured by body weight, adiposity, plasma fasting glucose, insulin, triglycerides, phospholipids, total cholesterol levels, and glucose and insulin tolerance tests) deteriorated with diet for both genotypes, while mice lacking Csf2 were protected from insulin resistance. Regardless of diet, 30, mostly mitochondrial metabolism proteins participating in amino acid and branched chain amino acid pathways were altered, between Csf2-/- and Csf2+/+ mice. Tissue DHTKD1 levels were >4-fold upregulated and plasma 2-aminoadipoate (2-AA) levels were >2 fold reduced in Csf2-/- mice. GM-CSF driven dendritic cells play a detrimental role in insulin sensitivity via lysine metabolism involving Dhtkd1/2-AA axis.

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Microarray Experiments for mice lacking or with the Stat5a and 5b genes in blood cells that were treated w/o CMP

Project description:GM-CSF controls the development of granulocytes but little is known about the contribution of the downstream mediating transcription factor STAT5A/B. To elucidate this pathway, we generated mice lacking the Stat5a and 5b genes in blood cells. Peripheral neutrophils were decreased and administration of 5-FU and GM-CSF failed to induce granulopoiesis in Stat5a/b-mutant mice. CMPs were isolated and cultured with GM-CSF. Experiment Overall Design: Microarray Experiments for mice lacking or with the Stat5a and 5b genes in blood cells that were treated w/o CMP

2010-02-21 | E-GEOD-14698 | biostudies-arrayexpress

Microarray Experiments for mice lacking or with the Stat5a and 5b genes in blood cells that were treated w/o CMP

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Gene therapy of Csf2ra-/- deficiency in long-term cultured fetal monocyte precursors restores bona fide alveolar macrophage development and function in mice

Project description:Tissue-resident macrophage-based immune therapies have been proposed for various diseases. However, generation of sufficient numbers that possess tissue-specific functions remains a major handicap. Here, we show that fetal liver monocytes cultured with GM-CSF (CSF2-cFLiMo) rapidly differentiate into a long-lived, homogeneous alveolar macrophage (AM)-like population in vitro. CSF2-cFLiMo remained the capacity to develop into bona fide AM upon transfer into Csf2ra-/- neonates and prevented development of alveolar proteinosis and accumulation of apoptotic cells for at least 1 year in vivo. CSF2-cFLiMo more efficiently engrafted empty AM niches in the lung and protected mice from severe pathology induced by respiratory viral infection, compared to transplantation of macrophages derived from bone marrow cells cultured with M-CSF (CSF1-cBMM) in the presence or absence of GM-CSF. Harnessing the potential of this approach for gene therapy, we restored a disrupted Csf2ra gene in FLiMo and demonstrated their capacity to develop into AM in vivo. Together, we provide a novel platform for generation of immature AM-like precursors amenable for genetic manipulation, which will be useful to dissect AM development and function and pulmonary transplantation therapy.

2022-01-15 | GSE193537 | GEO

miRNA in mouse macrophages

Project description:By employing miRCURY LNAM-bM-^DM-" microRNA Array, we have identified a subset of 21 top miRNAs that are differentially expressed between GM-BMM and M-BMM cells To know the differential expression of miRNA in mouse GM-CSF-induced bone marrow-derived macrophages (GM-BMM) vs. M-CSF-induced BMM (M-BMM)

2013-04-17 | E-GEOD-46085 | biostudies-arrayexpress

Microarray analysis of WT bone marrow myeloid progenitors, BM cultured with GM-CSF and M-CSF, and monocytes treated with GM-CSF

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