Lysophosphatidylserine suppression of T-cell activation via GPR174 requires Gαs proteins.
Lysophosphatidylserine suppression of T-cell activation via GPR174 requires Gαs proteins.
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DOI:
10.1111/imcb.12025
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发表时间:
2018-04
影响因子:
4
通讯作者:
Cyster JG
中科院分区:
文献类型:
--
作者:
Barnes MJ;Cyster JG
G protein-coupled receptors regulate diverse aspects of T cell activity and effector function. Recently, we showed that GPR174 mediates the suppression of T cell proliferation in vitro induced by the polar lipid lysophosphatidylserine (LysoPS). Here, we investigated the in vivo activity of this pathway and characterized the mechanisms involved. Using in vivo models of T cell proliferation induced by sublethal irradiation or regulatory T cell depletion, we show that GPR174 expression can constrain T cell proliferation. In vitro experiments established that Gαs G proteins are needed for LysoPS/GPR174-mediated suppression of T cell proliferation. Mechanistically, LysoPS acts via GPR174 and Gαs to suppress IL-2 production by activated T cells and limit upregulation of the activation markers CD25 and CD69. Together, our findings identify GPR174 as an abundantly expressed Gαs-dependent receptor that can negatively regulate naive T cell activation. Lysophosphatidylserine (LysoPS) can suppress T cell proliferation via GPR174. Here, we show that GPR174 negatively regulates T cell proliferation in vivo using models of homeostatic proliferation and regulatory T cell depletion. Mechanistically, LysoPS reduced early T cell activation and IL-2 production, and required G(alpha)s G-protein subunits to mediate these effects.
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影响因子:
32.4
作者:
Ernst, B;Lee, DS;Surh, CD
通讯作者:
Surh, CD
影响因子:
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作者:
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通讯作者:
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影响因子:
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DOI:
10.1073/pnas.0605251103
发表时间:
2006-08-29
影响因子:
11.1
作者:
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通讯作者:
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影响因子:
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作者:
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通讯作者:
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