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L-DOPA cyclohexyl ester is a novel stable and potent competitive antagonist against L-DOPA, as compared to L-DOPA
1Department of Pharmacology, Yokohama City University School of Medicine, Yokohama, Japan.
Japanese Journal of Pharmacology
|January 20, 1998
Abstract:
We explore stable potent competitive antagonists against L-DOPA. In anesthetized rats, DOPA cyclohexyl ester (DOPA CHE) (30-100 ng) microinjected in depressor sites of the nucleus tractus solitarii dose-dependently shifted the dose-response-curve for L-DOPA (18-300 ng) to the right, with DOPA CHE (100 ng)-induced slight reduction of the maximum response. DOPA methyl ester (DOPA ME) at 100 ng also produced competitive antagonism. Antagonistic activity of DOPA CHE (100 ng) was similar to that of DOPA ME (300 ng). DOPA CHE is suitable for the purpose of screening.