P1-purinoceptors mediate relaxation of the bovine bronchial artery.

@article{Alexander1985P1purinoceptorsMR,
  title={P1-purinoceptors mediate relaxation of the bovine bronchial artery.},
  author={Ian Alexander and Peter J. Eyre},
  journal={European journal of pharmacology},
  year={1985},
  volume={107 3},
  pages={359-62}
}
Adenosine 5'-triphosphate (ATP), adenosine 5'-diphosphate (ADP), adenosine 5'-monophosphate (AMP) and adenosine all relaxed the bronchial artery. All four purines tested were more efficacious than isoproterenol. Dipyridamole (10(-6) M) enhanced the relaxations due to adenosine and ATP while theophylline (10(-6) M) inhibited the relaxations due to adenosine and ATP. The results suggest the presence of P1-type purinoceptors in the bronchial artery of cattle.