Abstract
Hematopoietic stem cells (HSCs) reside in the bone marrow and are responsible for the lifetime maintenance of the blood and bone marrow, achieved through their differentiation into the myriad cellular components and their ability to generate additional stem cells via self-renewal. Identification of intrinsic and extrinsic factors that regulate how the HSC population is maintained over the lifespan of an organism, or those that trigger differentiation into mature hematopoietic cell types, are important goals for regenerative medicine. Recent studies have found that inflammatory signals play a role in the regulation of adult HSC homeostasis and tonic innate immune signals influence HSC development during embryogenesis. Additionally, dysregulation of inflammatory cytokines, and the consequent impact of this on hematopoietic progenitors, may be a contributing factor to the hematopoietic defects that occur during aging and in patients with bone marrow failure syndromes or blood cancers. To update recent findings on this topic, the International Society for Experimental Hematology (ISEH) organized a webinar entitled "The Role of Inflammatory Signals in Embryonic HSC Development and Adult HSC Function," which we summarize here.
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