Ripk3 signaling regulates HSCs during stress and represses radiation-induced leukemia in mice

Lei Zhang, Huacheng Luo, Hong Min Ni, Shanhui Liu, Hongyun Xing, Jun Zhang, Mark Sellin, Peter S.J. Breslin, Wei Wei, Mitchell F. Denning, William Small, Wen Xing Ding, Suming Huang, Jiwang Zhang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Receptor-interacting protein kinase 3 (Ripk3) is one of the critical mediators of inflammatory cytokine-stimulated signaling. Here we show that Ripk3 signaling selectively regulates both the number and the function of hematopoietic stem cells (HSCs) during stress conditions. Ripk3 signaling is not required for normal homeostatic hematopoiesis. However, in response to serial transplantation, inactivation of Ripk3 signaling prevents stress-induced HSC exhaustion and functional HSC attenuation, while in response to fractionated low doses of ionizing radiation (IR), inactivation of Ripk3 signaling accelerates leukemia/lymphoma development. In both situations, Ripk3 signaling is primarily stimulated by tumor necrosis factor-α. Activated Ripk3 signaling promotes the elimination of HSCs during serial transplantation and pre-leukemia stem cells (pre-LSCs) during fractionated IR by inducing Mlkl-dependent necroptosis. Activated Ripk3 signaling also attenuates HSC functioning and represses a pre-LSC-to-LSC transformation by promoting Mlkl-independent senescence. Furthermore, we demonstrate that Ripk3 signaling induces senescence in HSCs and pre-LSCs by attenuating ISR-mediated mitochondrial quality control.

Original languageEnglish (US)
Pages (from-to)1428-1441
Number of pages14
JournalStem Cell Reports
Volume17
Issue number6
DOIs
StatePublished - Jun 14 2022

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Genetics
  • Developmental Biology
  • Cell Biology

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