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- W4313356626 abstract "Abstract Bone marrow failure (BMF) is a devastating disease where regeneration of peripheral blood lineages is compromised, resulting in anemia and mortality. In IL-2 KO BALB/c mice, the balance between early myeloid and lymphoid progenitor cell populations is skewed resulting in insufficient myelopoiesis with accumulation of CD8 T cells in the BM. It is widely accepted that crosstalk between cells of the bone microenvironment and hematopoietic cells affects each other’s behavior. However, it remains unknown how the BM niche in this mouse model contribute to the BMF. Multipotent stromal cells (MSCs), osteoblasts (OBs) and endothelial cells (ECs) are the three types of BM stromal cells (BMSCs) that may serve as the distinct functional niche to maintain HSCs. Repots have shown the interplay between CD8 T cells and MSCs cause a change in myelopoiesis and that MSCs promote the formation of Tregs. Our data also indicates that IL-2 KO CD8 T cells are important for the expansion of CD4 T cells in the bone. Since IL-2 KO bones are extremely brittle and CD4 T cells produce RANKL, the ligand needed for osteoclast (OC) differentiation, we evaluated the frequency of BMSCs and OCs. Our preliminary data shows clear differences in BMSCs profiles of IL-2 KO mice, namely elevated stromal cell numbers and a shift in Sca-1 expression in ECs and CD51 expression in OBs. Additionally, OC precursor frequency is elevated in the BM, indicating an increase in bone resorption. The ability of the different subsets of the BMSCs to support the differentiation of HSCs in vitro and the role of CD8 T cells in promoting these changes in vivo is being currently evaluated. Overall, our preliminary data suggests that the change in the bone microenvironment may contribute to the BMF observed in these mice." @default.
- W4313356626 created "2023-01-06" @default.
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- W4313356626 date "2016-05-01" @default.
- W4313356626 modified "2023-09-23" @default.
- W4313356626 title "The contribution of the HSCs niche to bone marrow failure in the IL-2 deficient model" @default.
- W4313356626 doi "https://doi.org/10.4049/jimmunol.196.supp.186.14" @default.
- W4313356626 hasPublicationYear "2016" @default.
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