Transcriptomics

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TFPI from Erythroblasts Drives Heme Production in Central Macrophages Promoting Erythropoiesis in Polycythemia Vera


ABSTRACT: Erythropoietic homeostasis is coordinated by erythroblast development and challenged by a number of genetic diseases including polycythemia vera. Erythroblasts and central macrophages form erythroblastic islands to provide a specific environment for erythropoiesis. However, how central macrophages interplay with erythroblasts during erythropoiesis remains to be further clarified. In this study, we found that erythroid-specific TFPI knockout decreased the number of erythroblasts under both steady-state and stress conditions, and the function of TFPI in erythropoiesis was mediated by macrophages. TFPI affects the downstream heme synthesis pathway of central macrophages, as shown by RNA sequencing analysis, and the deletion of TFPI reduced the heme content of macrophages by inhibiting ferrochelatase (Fech) expression. Our results show that TFPI plays an important role in the regulation of erythropoiesis and reveal a new mechanism of interplay between erythroblasts and macrophages. TFPI will also provide a new potential treatment strategy for polycythemia vera.

ORGANISM(S): Mus musculus

PROVIDER: GSE224994 | GEO | 2024/03/01

REPOSITORIES: GEO

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