Exploring human adenosine A3 receptor complementarity and activity for adenosine analogues modified in the ribose and purine moiety
摘要:
In this paper we investigated the influence on affinity, selectivity and intrinsic activity upon modification of the adenosine agonist scaffold at the 3- and 5'-positions of the ribofuranosyl moiety and the 2- and N-6-positions of the purine base. This resulted in the synthesis of various analogues, that is, 3-12 and 24-33, with good hA(3)AR selectivity and moderate-to-high affinities (as in 32, K-i = 27 nM). Interesting was the ability to tune the intrinsic activity depending on the substituent introduced at the 3'-position. (C) 2004 Elsevier Ltd. All rights reserved.