期刊
SCIENCE SIGNALING
卷 13, 期 651, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/scisignal.aba3300
关键词
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资金
- NIH [R01 GM-51477, R01 GM-116162, R01 HD-098363, R35 GM-136429, T32 GM-103702]
- Austrian Marshall Plan Foundation
- Harvard Catalyst, Harvard Clinical and Translational Science Center (National Center for Research Resources)
- Harvard Catalyst, Harvard Clinical and Translational Science Center (National Center for Advancing Translational Sciences, NIH) [UL1 TR002541]
- Harvard University
T cells must migrate to encounter antigen-presenting cells and perform their roles in host defense. Here, we found that autocrine stimulation of the purinergic receptor P2Y11 regulates the migration of human CD4 T cells. P2Y11 receptors redistributed from the front to the back of polarized cells where they triggered intracellular cAMP/PKA signals that attenuated mitochondrial metabolism at the back. The absence of P2Y11 receptors at the front of cells resulted in hotspots of mitochondrial metabolism and localized ATP production that stimulated P2X4 receptors, Ca2+ influx, and pseudopod protrusion at the front. This regulatory function of P2Y11 receptors depended on their subcellular redistribution and autocrine stimulation by cellular ATP release and was perturbed by indiscriminate global stimulation. We conclude that excessive extracellular ATP-such as in response to inflammation, sepsis, and cancer-disrupts this autocrine feedback mechanism, which results in defective T cell migration, impaired T cell function, and loss of host immune defense.
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