Molecular modeling study on potent and selective adenosine A(3) receptor agonists.

School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, Via S. Agostino 1, 62032 Camerino (MC), Italy.
Bioorganic & medicinal chemistry (Impact Factor: 2.82). 09/2010; 18(22):7923-30. DOI: 10.1016/j.bmc.2010.09.038
Source: PubMed

ABSTRACT Adenosine A(3) receptor (A(3)AR) is involved in a variety of key physio-pathological processes and its agonists are potential therapeutic agents for the treatment of rheumatoid arthritis, dry eye disorders, asthma, as anti-inflammatory agents, and in cancer therapy. Recently reported MECA (5'-N-methylcarboxamidoadenosine) derivatives bearing a methyl group in N(6)-position and an arylethynyl substituent in 2-position demonstrated to possess sub-nanomolar affinity and remarkable selectivity for the human A(3)AR, behaving as full agonists of this receptor. In this study, we made an attempt to get a rationalization of the high affinities and selectivities of these molecules for the human A(3)AR, by using adenosine receptor (AR) structural models based on the A(2A)AR crystal structure and molecular docking analysis. Post-docking analysis allowed to evaluate the ability of modeling tools in predicting AA(3)R affinity and in providing interpretation of compound substituents effect on the A(3)AR affinity and selectivity.

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