Interferon gamma signaling positively regulates hematopoietic stem cell emergence.
Interferon gamma signaling positively regulates hematopoietic stem cell emergence.
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DOI:
10.1016/j.devcel.2014.11.007
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发表时间:
2014-12-08
影响因子:
11.8
通讯作者:
Stainier, Didier Y. R.
中科院分区:
文献类型:
--
作者:
Sawamiphak, Suphansa;Kontarakis, Zacharias;Stainier, Didier Y. R.
Vertebrate hematopoietic stem cells (HSCs) emerge in the aorta-gonad-mesonephros (AGM) region from “hemogenic” endothelium. Here we show that the pro-inflammatory cytokine Ifn-γ and its receptor Crfb17 positively regulate HSC development in zebrafish. This regulation does not appear to modulate the proliferation or survival of HSCs or endothelial cells, but rather the endothelial to HSC transition. Notch signaling and blood flow positively regulate the expression of ifng and crfb17 in the AGM. Notably, Ifn-γ overexpression partially rescues the HSC loss observed in the absence of blood flow or Notch signaling. Importantly, Ifn-γ signaling acts cell-autonomously to control the endothelial to HSC transition. Ifn-γ activates Stat3, an atypical transducer of Ifn-γ signaling, in the AGM, and Stat3 inhibition decreases HSC formation. Together, our findings uncover a developmental role for an inflammatory cytokine and place its action downstream of Notch signaling and blood flow to control Stat3 activation and HSC emergence.
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影响因子:
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通讯作者:
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