Table 2.
Expression profiles and functional responses of the purinergic receptor subtypes in different immune cells
Inflammatory cell type | Functional response to purines | P2 receptor subtype (expression profile and/or involvement in functional response) |
---|---|---|
Neutrophils | Undefined roles | P2Y1, P2Y4, P2Y11, P2Y14 and P2X7 |
Calcium mobilization | P2Y2 | |
Actin polymerization | P2Y2 | |
Primary granule release | P2Y2 | |
Chemotaxis | P2Y2, P2Y6 and P2X1 | |
Reduced cAMP accumulation | P2Y14 | |
Delay in constitutive neutrophil apoptosis | P2Y11 | |
Macrophages | Undefined roles | P2Y4, P2Y6, P2Y11, P2Y12, P2Y13, P2Y14 and P2X1–P2X6 |
Intracellular calcium increase | P2Y1, P2Y2, P2Y4, P2Y11, P2X4 and P2X7 | |
IL-1β/IL-18 maturation/release via the NLRP3 inflammasome, caspase-1 and cytosolic K+ depletion | P2X7 | |
Release of cathepins, PGE2, MMP-9 phosphatidilserine (caspase independent) | P2X7 | |
Promoting chemotaxis/phagocytosis | P2Y2, P2Y12, P2X1 and P2X3 | |
Regulation of autophagy | P2X4 and P2X7 | |
Multinucleated giant cells formation | P2X7 | |
Dendritic cells | Undefined roles | P2X1, P2X4, P2X5, P2X7, P2Y1, P2Y4, P2Y6 and P2Y11 |
Regulation in cytokine release | P2Y11 | |
DC maturation | P2Y11, P2Y12 and P2Y14 | |
Apoptosis | P2X7 | |
DC migration | P2Y2 and P2Y11 | |
Lymphocytes | ||
B and T cells | Undefined roles | P2X2, P2X3, P2X5, P2X6 and all P2Y |
T cell activation (p38 MAPK activation and IL-2 gene transcription ) | P2X1, P2X4 and P2X7 | |
T cell activation (CD62L shedding) | P2X7 | |
cAMP accumulation | P2Y14 | |
Inhibition of immunosuppressive potential of Tregs | P2X7 | |
Natural killer cells | Regulation of NK cytoxicity and chemotaxis | P2Y11 |
Eosinophils | Undefined roles | P2Y1, P2Y4, P2Y6, P2Y11, P2Y14, P2X1, P2X4 and P2X7 |
Chemotaxis | P2Y2 | |
Release of chemokines and cytokines | P2Y2, P2X1, P2X7 and P2Y6 | |
Mast cells | Undefined roles | P2X1, P2X4, P2X6, P2X7, P2Y1, P2Y2, P2Y11, P2Y12 and P2Y13 |
Degranulation | P2Y13 and P2Y14 |
Reproduced from [550], with permission from Springer