Novel multiple opioid ligands based on 4-aminobenzazepinone (Aba), azepinoindole (Aia) and tetrahydroisoquinoline (Tic) scaffolds

BALLET S;MARCZAK E. D;FEYTENS D;SALVADORI S;SASAKI Y;ABELL A. D;LAZARUS L. H;BALBONI, GIANFRANCO;TOURWE' D.

2010-01-01

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Abstract

The dimerization and trimerization of the Dmt-Tic, Dmt-Aia and Dmt-Aba pharmacophores provided multiple ligands which were evaluated in vitro for opioid receptor binding and functional activity. Whereas the Tic- and Aba multimers proved to be dual and balanced delta/mu antagonists, as determined by the functional [S(35)]GTPgammaS binding assay, the dimerization of potent Aia-based 'parent' ligands unexpectedly resulted in substantial less efficient receptor binding and non-active dimeric compounds.