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Journal Article
Review
The impact of prenatal inflammation on hematopoietic development.
Current Opinion in Hematology 2023 July 2
PURPOSE OF REVIEW: Inflammation is now recognized as a major regulator of hematopoietic stem cell (HSC) function. Adult hematopoietic stem cells can adaptively modulate hematopoietic output in direct response to acute infection and inflammation. Conversely, prolonged exposure to inflammation can drive impaired HSC function, clonal expansion, and malignant transformation. As compared with adult hematopoiesis, the effects of prenatal inflammation on developing hematopoietic stem cells are understudied.
RECENT FINDINGS: Inflammatory cues directly activate adult HSCs in the bone marrow, but the response of fetal HSCs to maternal inflammation is underexplored. Recent evidence demonstrates that maternal inflammation can be detected by fetal hematopoietic stem and progenitor cells (HSPCs) within the fetal liver and that the same inflammatory cues evoke fundamentally distinct responses during development. The responses of developing stem and progenitor cells and the specialized immune cells they produce have important implications for postnatal hematopoietic output and immune function.
SUMMARY: We discuss recent insights into the response of fetal hematopoiesis to prenatal inflammation and examine how recent discoveries regarding the contribution of fetal hematopoiesis to the adult hematopoietic system will influence future studies.
RECENT FINDINGS: Inflammatory cues directly activate adult HSCs in the bone marrow, but the response of fetal HSCs to maternal inflammation is underexplored. Recent evidence demonstrates that maternal inflammation can be detected by fetal hematopoietic stem and progenitor cells (HSPCs) within the fetal liver and that the same inflammatory cues evoke fundamentally distinct responses during development. The responses of developing stem and progenitor cells and the specialized immune cells they produce have important implications for postnatal hematopoietic output and immune function.
SUMMARY: We discuss recent insights into the response of fetal hematopoiesis to prenatal inflammation and examine how recent discoveries regarding the contribution of fetal hematopoiesis to the adult hematopoietic system will influence future studies.
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