P2X7 Receptor at the Crossroads of T Cell Fate.

International Journal of Molecular Sciences
Elizabeth Rivas-YáñezDaniela Sauma

Abstract

The P2X7 receptor is a ligand-gated, cation-selective channel whose main physiological ligand is ATP. P2X7 receptor activation may also be triggered by ARTC2.2-dependent ADP ribosylation in the presence of extracellular NAD. Upon activation, this receptor induces several responses, including the influx of calcium and sodium ions, phosphatidylserine externalization, the formation of a non-selective membrane pore, and ultimately cell death. P2X7 receptor activation depends on the availability of extracellular nucleotides, whose concentrations are regulated by the action of extracellular nucleotidases such as CD39 and CD38. The P2X7 receptor has been extensively studied in the context of the immune response, and it has been reported to be involved in inflammasome activation, cytokine production, and the migration of different innate immune cells in response to ATP. In adaptive immune responses, the P2X7 receptor has been linked to T cell activation, differentiation, and apoptosis induction. In this review, we will discuss the evidence of the role of the P2X7 receptor on T cell differentiation and in the control of T cell responses in inflammatory conditions.

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Citations

Jan 6, 2021·Immunotherapy·Carlos Barrera-AvalosClaudio Acuña-Castillo
Mar 3, 2021·Current Opinion in Organ Transplantation·Nathan HaywoodVictor E Laubach
Jun 15, 2021·Frontiers in Cellular Neuroscience·Ágatha Oliveira-GiacomelliHenning Ulrich

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