title: Synthesis and adenosine receptor affinity and potency of 8-alkynyl derivatives of adenosine.
abstract: Adenosine derivatives bearing different (ar)alkynyl chains at the 8-position were synthesized and tested at human adenosine receptors. Binding studies showed that all compounds possess affinity for the A3 subtype in the high nM range. Moreover, guanosine 5'-O-(3-[35S]thio)triphosphate binding assay indicated that the 8-alkynyl adenosines behaved as antagonists of NECA at A3 receptors.
authors.affiliation: Dipartimento di Scienze Chimiche, University of Camerino, I-62032 Camerino, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Lambertucci
authors.forename: S
authors.initials: S
authors.lastname: Costanzi
authors.forename: S
authors.initials: S
authors.lastname: Vittori
authors.forename: R
authors.initials: R
authors.lastname: Volpini
authors.forename: G
authors.initials: G
authors.lastname: Cristalli
mesh_terms: D000241:Adenosine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000378:metabolism / Q000494:pharmacology; D019830:Adenosine-5'-(N-ethylcarboxamide) / Q000037:antagonists & inhibitors / Q000378:metabolism / Q000494:pharmacology; D000478:Alkylation; D000818:Animals; D016466:CHO Cells; D006224:Cricetinae; D016244:Guanosine 5'-O-(3-Thiotriphosphate) / Q000378:metabolism; D006801:Humans; D058906:Purinergic P1 Receptor Agonists; D043684:Receptor, Adenosine A3; D018047:Receptors, Purinergic P1 / Q000378:metabolism*
chemical_list: D058906:Purinergic P1 Receptor Agonists; D043684:Receptor, Adenosine A3; D018047:Receptors, Purinergic P1; D019830:Adenosine-5'-(N-ethylcarboxamide); D016244:Guanosine 5'-O-(3-Thiotriphosphate); D000241:Adenosine