alexa Hyperforin represents the neurotransmitter reuptake inhibiting constituent of hypericum extract.
Medicine

Medicine

Evidence based Medicine and Practice

Author(s): Mller WE, Singer A, Wonnemann M, Hafner U, Rolli M, , Mller WE, Singer A, Wonnemann M, Hafner U, Rolli M,

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Abstract Hydroalcoholic hypericum extract inhibits the synaptosomal uptake of serotonin, norepinephrine, and dopamine with about similar affinities and leads to a significant down-regulation of cortical beta-adrenoceptors and 5-HT2-receptors after subchronic treatment of rats. While neither hypericine nor kaempferol did show any reuptake inhibiting properties, hyperforin was identified as the unspecific reuptake inhibitor of hypericum extracts with half-maximal inhibitory concentrations for the three synaptosomal uptake systems mentioned above between 80 and 200 nmol/l. Moreover, a hyperforin-enriched (38\%) CO2 extract also leads to a significant beta-receptor down-regulation after subchronic treatment. The data suggest hyperforin as the active principle of hypericum extracts in biochemical models of antidepressant activity. This article was published in Pharmacopsychiatry and referenced in Evidence based Medicine and Practice

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