Transcriptomics

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Interleukin-33 contributes to anemia of chronic inflammation by inhibiting differentiation of erythroid progenitors


ABSTRACT: Mature blood cells are produced continuously from hematopoietic stem and progenitor cells (HSPCs) in the bone marrow (BM). During chronic inflammation, this process may be perturbed by inflammatory cytokines acting on HSPCs to cause anemia of inflammatory disease. Among BM HSPCs, we found the receptor for interleukin (IL)-33, ST2, was expressed preferentially and highly on erythroid progenitors. Induction of inflammatory spondyloarthritis in mice increased IL-33 in BM plasma, and IL-33 was required for inflammation-dependent suppression of erythropoiesis in BM. Conversely, administration of IL-33 in healthy mice suppressed erythropoiesis, decreased hemoglobin expression, and caused anemia. Using purified erythroid progenitors in vitro, we showed that IL-33 directly inhibited terminal maturation. This effect was dependent on NF-kB activation and was associated with altered signalling events downstream of the erythropoietin receptor. Accordingly, IL-33 also suppressed erythropoietin-induced stress erythropoiesis in vivo. These results reveal a role for IL-33 in regulation of erythropoiesis during inflammatory disease and define a new target for its treatment.

ORGANISM(S): Mus musculus

PROVIDER: GSE141480 | GEO | 2020/05/15

REPOSITORIES: GEO

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