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• W4378172023 abstract "Abstract The bone marrow niche maintains hematopoietic stem cell (HSC) homeostasis and declines in function in the physiologically aging population and in patients with hematological malignancies. A fundamental question is now whether and how HSCs are able to renew or repair their niche. Here, we show that disabling HSCs based on disrupting autophagy accelerated niche aging in mice, whereas transplantation of young, but not aged or impaired, donor HSCs normalized niche cell populations and restored niche factors in host mice carrying an artificially harassed niche and in physiologically aged host mice, as well as in leukemia patients. Mechanistically, HSCs, identified using a donor lineage fluorescence‐tracing system, transdifferentiate in an autophagy‐dependent manner into functional niche cells in the host that include mesenchymal stromal cells and endothelial cells, previously regarded as “nonhematopoietic” sources. Our findings thus identify young donor HSCs as a primary parental source of the niche, thereby suggesting a clinical solution to revitalizing aged or damaged bone marrow hematopoietic niche." @default.
• W4378172023 created "2023-05-26" @default.
• W4378172023 creator A5006355763 @default.
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• W4378172023 creator A5092014373 @default.
• W4378172023 date "2023-05-24" @default.
• W4378172023 modified "2023-10-14" @default.
• W4378172023 title "Young donor hematopoietic stem cells revitalize aged or damaged bone marrow niche by transdifferentiating into functional niche cells" @default.
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