Ca(2+)-induced increase in oxidative metabolism of dissociated mammalian brain neurons: effect of extract of ginkgo biloba leaves

Author(s): Hayashi, A., Ueha, T.

Journal/Book: Japanese Journal of Pharmacology. 1993; 61(4): 367-370.

Abstract: Effect of an extract of Ginkgo biloba leaves (EGb) on oxidative metabolism was studied using rat brain neurons and 2',7'-dichlorofluorescin fluorescence. Ionomycin (100 nM to 1 microM), a Ca(2+)-ionophore, dose-dependently augmented the 2',7'-dichlorofluorescin fluorescence in the presence of external Ca2+, but not under the external Ca(2+)-free condition. Preincubation of neurons with EGb (3 micrograms/ml) greatly reduced the ionomycin-induced increase in 2',7'-dichlorofluorescin fluorescence. Results suggest that EGb may reduce the Ca(2+)-induced increase in the oxidative metabolism of brain neurons.

Keyword(s): Brain-Chemistry-drug-effects

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