期刊
JOURNAL OF MEDICINAL CHEMISTRY
卷 54, 期 22, 页码 7911-7919出版社
AMER CHEMICAL SOC
DOI: 10.1021/jm2009919
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资金
- Deutsche Forschungsgemeinschaft (DFG) [Gm 13/8]
Bivalent D-2 agonists may function as useful molecular probes for the discovery of novel neurological therapeutics. On the basis of our recently developed bivalent dopamine D-2 receptor antagonists of type 1, the bivalent agonist 2 was synthesized when a spacer built from 22 atoms was employed. Compared to the monovalent control compound 6 containing a capped spacer, the bis-aminoindane derivative 2 revealed substantial steepening of the competition curve, indicating a bivalent binding mode. Dimer-specific Hill slopes were not a result of varying functional properties because both the dopaminergic 2 and the monovalent control agent 6 proved to be D-2 agonists substantially inhibiting cAMP accumulation and inducing D-2 receptor internalization. Investigation of the heterobivalent ligands 8 and 9, containing an agonist and a phenylpiperazine-based antagonist pharmacophore, revealed moderate steepening of the displacement curves and antagonist to very weak partial agonist properties.
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