Nucleotide receptors on DDT1 MF-2 vas deferens cells.

On exposure to triphosphatic nucleotides vas deferens DDT1 MF-2 smooth muscle cells responded with an outward K+ current as measured with the whole-cell patch clamp configuration. The rank order of potency was: ATP greater than UTP greater than TTP greater than CTP = GTP. The responses evoked by these agonists were blocked by suramin. Adenosine, ADP, alpha, beta-methylene-ATP and 2-methylthio-ATP did not affect the transmembrane current. The responses evoked by the nucleotides in DDT1 MF-2 cells are supposed to be mediated via 'nucleotide' receptors.