%0 Journal Article %1 Volpini2007 %A Volpini, R. %A Ben, D. Dal %A Lambertucci, C. %A Taffi, S. %A Vittori, S. %A Klotz, K. N. %A Cristalli, G. %D 2007 %J J Med Chem %K & *Models, A3/*agonists AMP/biosynthesis Acid Adenosine Adenosine/*analogs Alkynes/*chemical Amino Animals Assay CHO Cricetinae Cricetulus Cyclic Homology, Humans Ligands Molecular Proteins/agonists Radioligand Recombinant Relationship Rhodopsin/chemistry Sequence Structure-Activity derivatives/*chemical synthesis/chemistry/pharmacology Receptor Cell %N 6 %P 1222-30 %T N6-methoxy-2-alkynyladenosine derivatives as highly potent and selective ligands at the human A3 adenosine receptor %U http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17309246 %V 50 %X A new series of N6-methoxy-2-(ar)alkynyladenosine derivatives has been synthesized and tested at the human recombinant adenosine receptors. Binding studies demonstrated that the new compounds possess high affinity and selectivity for the A3 subtype. Among them, compounds bearing an N-methylcarboxamido substituent in the 4'-position showed the highest A3 affinity and selectivity. In particular, the N6-methoxy-2-p-acetylphenylethynylMECA (40; Ki A3 = 2.5 nM, A3 selectivity versus A1 = 21 500 and A2A = 4200) results in one of the most potent and selective agonists at the human A3 adenosine receptor reported so far. Furthermore, functional assay, performed with selected new compounds, revealed that the presence of an alkylcarboxamido group in the 4'-position seems to be essential to obtain full agonists at the A3 subtype. Finally, results of molecular docking analysis were in agreement with binding and functional data and could explain the high affinity and potency of the new compounds.

@article{Volpini2007, abstract = {A new series of N6-methoxy-2-(ar)alkynyladenosine derivatives has been synthesized and tested at the human recombinant adenosine receptors. Binding studies demonstrated that the new compounds possess high affinity and selectivity for the A3 subtype. Among them, compounds bearing an N-methylcarboxamido substituent in the 4'-position showed the highest A3 affinity and selectivity. In particular, the N6-methoxy-2-p-acetylphenylethynylMECA (40; Ki A3 = 2.5 nM, A3 selectivity versus A1 = 21 500 and A2A = 4200) results in one of the most potent and selective agonists at the human A3 adenosine receptor reported so far. Furthermore, functional assay, performed with selected new compounds, revealed that the presence of an alkylcarboxamido group in the 4'-position seems to be essential to obtain full agonists at the A3 subtype. Finally, results of molecular docking analysis were in agreement with binding and functional data and could explain the high affinity and potency of the new compounds.}, added-at = {2010-12-14T18:12:02.000+0100}, author = {Volpini, R. and Ben, D. Dal and Lambertucci, C. and Taffi, S. and Vittori, S. and Klotz, K. N. and Cristalli, G.}, biburl = {https://www.bibsonomy.org/bibtex/217b0e2c1dc96434edd6b96c1d8756609/pharmawuerz}, endnotereftype = {Journal Article}, interhash = {495be9bbe19b3adc18bb4b28b02b0391}, intrahash = {17b0e2c1dc96434edd6b96c1d8756609}, issn = {0022-2623 (Print) 0022-2623 (Linking)}, journal = {J Med Chem}, keywords = {& *Models, A3/*agonists AMP/biosynthesis Acid Adenosine Adenosine/*analogs Alkynes/*chemical Amino Animals Assay CHO Cricetinae Cricetulus Cyclic Homology, Humans Ligands Molecular Proteins/agonists Radioligand Recombinant Relationship Rhodopsin/chemistry Sequence Structure-Activity derivatives/*chemical synthesis/chemistry/pharmacology Receptor Cell}, month = {Mar 22}, note = {Volpini, Rosaria Dal Ben, Diego Lambertucci, Catia Taffi, Sara Vittori, Sauro Klotz, Karl-Norbert Cristalli, Gloria Research Support, Non-U.S. Gov't United States Journal of medicinal chemistry J Med Chem. 2007 Mar 22;50(6):1222-30. Epub 2007 Feb 20.}, number = 6, pages = {1222-30}, shorttitle = {N6-methoxy-2-alkynyladenosine derivatives as highly potent and selective ligands at the human A3 adenosine receptor}, timestamp = {2010-12-14T18:22:03.000+0100}, title = {N6-methoxy-2-alkynyladenosine derivatives as highly potent and selective ligands at the human A3 adenosine receptor}, url = {http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17309246}, volume = 50, year = 2007 }