Project description:The non-hematopoietic cell fraction of the bone marrow (BM) is classically identified as CD45– Ter119– CD31– (herein referred to as triple-negative cells or TNCs). Although TNCs are believed to contain heterogeneous stromal cell populations, they remain poorly defined. Here we show, unexpectedly, that the vast majority of TNCs (~85%) have a hematopoietic rather than mesenchymal origin. Single cell RNA-sequencing reveals erythroid and lymphoid progenitor signatures among CD51– TNCs. When cultured with BM-derived stromal cells, Ly6D+ CD44+ CD51–TNCs give rise to B-lymphoid cells, whereas Ly6D–CD44+ CD51–TNCs generate erythroid cells. In addition, CD44+ CD51– TNCs contribute to repopulate B-lymphoid and erythroid cells after transplantation in mice. The CD44+ CD51– TNC population also expands during phenylhydrazine-induced acute hemolysis or in a model of sickle cell anemia. These findings thus uncover physiologically relevant, yet unappreciated, classes of stromal-associated CD45– hematopoietic progenitors.
Project description:RNA and ATAC sequencing data of primary sorting CD45-Ter119-CD31-Scf; GFP+Cxcl12; DsRed+ bone marrow stromal cells ,2D cultured bone marrow stromal cells and 3D cultured bone marrow stromal cells. RNA sequencing data of sorted primary and 3D cocultured Lin-Sca1+C-kit+CD150+CD48+ hematopoietic stem cells from 8-12 weeks and 12-13 months old mice. RNA and ATAC sequencing data of primary sorting CD45-Ter119-CD31-Pdgfra+td-Tomato+ bone marrow stromal cells from young (8 wks), middle aged (12 months) and aged (22-24 months) Lepr-Cre;td-Tomato mice.
Project description:We used single-cell RNA sequencing (scRNA-seq) to analyze the diversity of bone marrow-derived CD45+CD11b+ microglia-like cells (MGLCs) engrafted in the brain of recipient mice that were conditioned using Busulfan and PLX3397 and transplanted with total bone marrow. We compared the gene expression of MGLCs to that of developmentally-derived CD45+ CD11b+ microglia/myeloid cells isolated from the brain of recipient mice (host microglia) and untreated mice (naive microglia). We also compared the gene expression of MGLCs to that of transplant-derived CD45+ CD11b+ cells engrafted in the bone marrow (abbreviated as BM-CD11b+)
Project description:We report the single cell transcriptome of CD45+ cells from the livers of bone marrow chimeric wildtype mice with NASH that had previously been transplanted with bone marrow from TREM2-deficient or wildtype littermate mice. We show that hematopoietic TREM2 deficiency is associated with alterations in the hepatic immune cell composition in the context of NASH.
Project description:Analyze and compare the gene expression profile of human bone marrow primary CD45-CD271+ and CD45-CD271- cells. The hypothesis was some genes were differentially expressed in these two populations. Results provided important information regarding the gene expression difference of these two cell populations.
Project description:To investigate the heterogeneity of lung stromal cells and identify the specific lung stromal subset, we performed single cell RNA-sequencing (scRNA-seq) on lung stromal cells (CD45-CD31-CD326-). Around 6800 cells were captured using the 10x Chromium technology.