Abstract

The GABAergic and glutamatergic systems play key roles in controlling activity of the central nervous system. Important membrane proteins in the mammalian central nervous system transporting extracellular GABA and glutamate are the GABA transporter GAT1 and the glutamate transporter EAAC1. We investigated the effect of catechins of green tea (Camellia sinensis) on the activity of GAT1 and EAAC1 by detecting the respective electrogenic transporter-mediated current under voltage clamp. Epigallocatechin-3-gallate inhibited GAT1-mediated current to 50% at about 100 μM. The EAAC1-mediated current could be stimulated up to 80% by (-)-epicatechin; 50% of maximum stimulation was achieved by about 5 μM. Inhibition of GAT1 and stimulation of EAAC1 will counteract hyperexcitability.

Details

Title
Catechins from green tea modulate neurotransmitter transporter activity in Xenopus oocytes
Author
Wang, Y X 1 ; Engelmann, T 1 ; Xu, Y F 2 ; Schwarz, W 1 

 Shanghai Research Center for Acupuncture and Meridians, Shanghai, China; Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai, China; Institute for Biophysics, Goethe-University Frankfurt, Frankfurt am Main, Germany 
 Shanghai Research Center for Acupuncture and Meridians, Shanghai, China; Shanghai Key Laboratory of Acupuncture Mechanism and Acupoint Function, Fudan University, Shanghai, China 
Publication year
2016
Publication date
Dec 2016
Publisher
Taylor & Francis Ltd.
e-ISSN
23312025
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2500692413
Copyright
© 2016 The Author(s). This open access article is distributed under a Creative Commons Attribution (CC-BY) 4.0 license. This work is licensed under the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.