Jacobson Kenneth A, Gao Zhan-Guo, Tchilibon Susanna, Duong Heng T, Joshi Bhalchandra V, Sonin Dmitry, Liang Bruce T
National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.
J Med Chem. 2005 Dec 29;48(26):8103-7. doi: 10.1021/jm050726b.
Ring-constrained adenosine analogues have been designed to act as dual agonists at tissue-protective A(1) and A(3) adenosine receptors (ARs). 9-Ribosides transformed into the ring-constrained (N)-methanocarba-2-chloro-5'-uronamides consistently lost affinity at A(1)/A(2A)ARs and gained at A(3)AR. Among 9-riboside derivatives, only N(6)-cyclopentyl and 7-norbornyl moieties were extrapolated for mixed A(1)/A(3) selectivity and rat/human A(3)AR equipotency. Consequently, 2 was balanced in affinity and potency at A(1)/A(3)ARs as envisioned and dramatically protected in an intact heart model of global ischemia and reperfusion.
环约束腺苷类似物已被设计为在组织保护性A(1)和A(3)腺苷受体(ARs)上起双重激动剂的作用。转化为环约束(N)-甲碳环-2-氯-5'-脲酰胺的9-核糖苷在A(1)/A(2A)ARs上持续丧失亲和力,而在A(3)AR上获得亲和力。在9-核糖苷衍生物中,只有N(6)-环戊基和7-降冰片基部分被推断具有混合的A(1)/A(3)选择性和大鼠/人类A(3)AR等效性。因此,如预期的那样,化合物2在A(1)/A(3)ARs上的亲和力和效力达到平衡,并在整体缺血再灌注的完整心脏模型中具有显著的保护作用。