Labeling of A1 adenosine receptors in porcine atria with the antagonist radioligand 8-cyclopentyl-1,3-[3H]dipropylxanthine

Mark Leid, Paul H. Franklin, Thomas F. Murray

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We have used the antagonist radioligand 8-cyclopentyl-1,3-[3H]dipropylxanthine to label adenosine recognition sites in porcine atrial membranes. 8-Cyclopentyl-1,3-[3H]dipropylxanthine bound saturably, reversibly and with high affinity to an apparently homogenous population of recognition sites with a Bmax of 32.0 ± 0.9 fmol/mg protein and a KD of 0.394 ± 0.049 nM. Prototypic adenosine receptor agonists inhibited the specific binding of 8-cyclopentyl-1,3-[3H]dipropylxanthi in a manner consistent with the labeling of an A1 adenosine receptor. 8-Cyclopentyl-1,3-[3H]dipropylxanthine appears to be a valuable antagonist radioligand for the characterization of cardiac adenosine receptors.

Original languageEnglish (US)
Pages (from-to)141-144
Number of pages4
JournalEuropean Journal of Pharmacology
Issue number1
StatePublished - Feb 16 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Pharmacology


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