IL-7 signaling must be intermittent, not continuous, during CD8⁺ T cell homeostasis to promote cell survival instead of cell death.
IL-7 signaling must be intermittent, not continuous, during CD8⁺ T cell homeostasis to promote cell survival instead of cell death.
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Maintenance of naive CD8 T cells is necessary for lifelong immunocompetence but for unknown reasons requires both interleukin-7 (IL-7) and T cell receptor (TCR) signaling. We now report that naive CD8 T cells require IL-7 signaling to be intermittent, not continuous, because prolonged IL-7 signaling induces naive CD8 T cells to proliferate, produce interferon-γ (IFN-γ), and undergo IFN-γ-triggered cell death. Homeostatic TCR engagements interrupt IL-7 signaling and thereby support CD8 T cell survival and quiescence. However, CD8 T cells with insufficient TCR affinity for self-ligands receive prolonged IL-7 signaling and die during homeostasis. This study identifies the regulation of IL-7 signaling duration by homeostatic TCR engagements as the basis for in vivo CD8 T cell homeostasis.
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影响因子:
32.4
作者:
Ernst, B;Lee, DS;Surh, CD
通讯作者:
Surh, CD
DOI:
10.1084/jem.172.6.1735
发表时间:
1990-12-01
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Liu Y;Janeway CA Jr
通讯作者:
Janeway CA Jr
DOI:
10.1038/nri2580
发表时间:
2009-07
期刊:
Nature reviews. Immunology
影响因子:
--
作者:
通讯作者:
--
影响因子:
30.5
作者:
通讯作者:
--
DOI:
10.1016/j.bbrc.2008.10.103
发表时间:
2008-12-19
影响因子:
3.1
作者:
Pyo, Chul-Woong;Lee, Shin-Hee;Choi, Sang-Yun
通讯作者:
Choi, Sang-Yun