Influence of xanthohumol on the binding behavior of GABAA receptors and their lateral mobility at hippocampal neurons

Planta medica
Oliver Meissner, Hanns Häberlein

Abstract

The influence of the xanthohumol from Humulus lupulus L. on the binding of muscimol-Alexa Fluor 532 (Mu-Alexa), a fluorescently labeled GABAA receptor agonist, was studied by fluorescence correlation spectroscopy. An incubation of hippocampal neurons with 75 nM of xanthohumol increased the specific Mu-Alexa binding by approximately 17%, which was selectively found in GABAA receptor Mu-Alexa complexes with hindered lateral mobility [D(bound2) = (0.11 +/- 0.03) microm2/s] as described with midazolam.

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