Towards an integrated understanding of inflammatory pathway influence on hematopoietic stem and progenitor cell differentiation

Bioessays 46 (4):2300142 (2024)
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Abstract

Recent research highlights that inflammatory signaling pathways such as pattern recognition receptor (PRR) signaling and inflammatory cytokine signaling play an important role in both on‐demand hematopoiesis as well as steady‐state hematopoiesis. Knockout studies have demonstrated the necessity of several distinct pathways in these processes, but often lack information about the contribution of specific cell types to the phenotypes in question. Transplantation studies have increased the resolution to the level of specific cell types by testing the necessity of inflammatory pathways specifically in donor hematopoietic stem and progenitor cells (HSPCs) or in recipient niche cells. Here, we argue that for an integrated understanding of how these processes occur in vivo and to inform the development of therapies that modulate hematopoietic responses, we need studies that knockout inflammatory signaling receptors in a cell‐specific manner and compare the phenotypes caused by knockout in individual niche cells versus HSPCs.

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