P2Y12

In the field of purinergic signaling, the P2Y12 protein is found mainly but not exclusively on the surface of blood platelets, and is an important regulator in blood clotting.

P2Y12 belongs to the Gi class of a group of G protein-coupled (GPCR) purinergic receptors and is a chemoreceptor for adenosine diphosphate (ADP). The P2Y family has several receptor subtypes with different pharmacological selectivity, which overlaps in some cases, for various adenosine and uridine nucleotides. This receptor is involved in platelet aggregation, and is a potential target for the treatment of thromboembolisms and other clotting disorders. Two transcript variants encoding the same isoform have been identified for this gene.

Clinical significance

The drugs, clopidogrel (Plavix), prasugrel (Efient, Effient), ticagrelor (Brilinta), and cangrelor (Kengreal) bind to this receptor and are marketed as antiplatelet agents.

P2Y12 inhibitors do not change the risk of death when given as a pretreatment prior to routine percutaneous coronary intervention (PCI) in people who have had a non-ST-elevation myocardial infarction (NSTEMI). They do however increase the risk of bleeding and decrease the risk of further cardiovascular problems. Thus their routine use in this context is of questionable value.

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