Arzneimittelforschung. 2000 Mar;50(3):232-5.

Evaluation of a ginkgo biloba extract (EGb 761) in functional tests for monoamine oxidase inhibition.

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Porsolt and Partners Pharmacology, Boulogne-Billancourt, France. rporsolt@porsolt.com

Abstract

A standardized extract of ginkgo biloba (EGb 761) was evaluated in functional tests for monoamine oxidase (MAO) inhibition in mice: l-dihydroxyphenylalanine (CAS 59-92-7,1-DOPA) potentiation, tryptamine (CAS 61-54-1) potentiation, 5-hydroxytryptophan (CAS 4350-07-6,5-HTP) potentiation and phenylethylamine (CAS 64-04-0) potentiation. The doses investigated (25, 50 and 100 mg/kg p.o once daily for 5 days) were those known to possess anti-stress properties in other animal models. In contrast to the reference substances investigated (nialamide (CAS 51-12-7), clorgyline (CAS 17780-75-5) and 1-deprenyl (CAS 14611-52-01), EGb 761 did not exhibit any activity indicative of MAO inhibition. It was concluded that MAO inhibition was not the mechanism primarily responsible for EGb 761's anti-stress activity.

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Evaluation of a ginkgo biloba extract (EGb 761) in functional tests for monoamine oxidase inhibition.

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