P2X7 Receptor at the Crossroads of T Cell Fate
Elizabeth Rivas-Yáñez1, Carlos Barrera-Avalos2, Brian Parra-Tello1
1Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile.
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.
Insights
The P2X7 receptor, activated by ATP, influences immune cell responses. This review explores its critical role in T cell differentiation and inflammatory conditions.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- The P2X7 receptor is a cation channel activated by extracellular ATP.
- Its activation leads to ion influx, pore formation, and cell death.
- Extracellular nucleotide levels, regulated by nucleotidases like CD39 and CD38, are crucial for P2X7 receptor function.
Purpose of the Study:
- To review the role of the P2X7 receptor in T cell differentiation.
- To discuss its involvement in controlling T cell responses during inflammation.
Main Methods:
- Literature review of studies on P2X7 receptor function in immune cells.
- Analysis of P2X7 receptor's impact on T cell activation, differentiation, and apoptosis.
- Examination of P2X7 receptor's role in innate and adaptive immune responses.
Main Results:
- P2X7 receptor activation is implicated in inflammasome activation, cytokine production, and immune cell migration.
- The receptor influences T cell activation, differentiation, and programmed cell death.
- Extracellular nucleotide availability regulates P2X7 receptor-mediated immune responses.
Conclusions:
- The P2X7 receptor plays a significant role in modulating T cell differentiation.
- Understanding P2X7 receptor function is key to controlling T cell responses in inflammatory diseases.
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