Uridine adenosine tetraphosphate (UP4A) is an endothelium-derived vasoconstrictor that primarily acts through the P2X1 receptor and possibly through the P2Y2 and P2Y4 receptors. Uridine adenosine tetraphosphate can be used in the study of cardiovascular diseases[1].
References
[1] Jankowski, et al. "Uridine adenosine tetraphosphate: a novel endothelium-derived vasoconstrictive factor." Nature medicine 11.2 (2005): 223-227. DOI:10.1038/nm1188
