ArticlebioRxiv : the preprint server for biology2024
Bnip3lb-driven mitophagy sustains expansion of the embryonic hematopoietic stem cell pool.
Article in bioRxiv : the preprint server for biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Embryonic hematopoietic stem and progenitor cells (HSPCs) have the unique ability to undergo rapid proliferation while maintaining multipotency, a clinically-valuable quality which currently cannot be replicated in vitro. Here, we show that embryonic HSPCs achieve this state by precise spatio-temporal regulation of reactive oxygen species (ROS) via Bnip3lb-associated developmentally-programmed mitophagy, a distinct autophagic regulatory mechanism from that of adult HSPCs. While ROS drives HSPC specification in the dorsal aorta, scRNAseq and live-imaging of HIGHLIGHTS: ROS promotes HSPC formation in the dorsal aorta but negatively affects maintenance thereafter.HSPCs colonizing secondary niches control ROS levels via Bnip3lb-directed mitophagy.Mitophagy protects nascent HSPCs from ROS-associated apoptosis and maintains multipotency.Induction of mitophagy enhances long-term hematopoietic potential of iPSC-derived HSPCs.
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