Herbrechter R, Beltrán LR, Ziemba PM, Titt S, Lashuk K, Gottemeyer A, Levermann J, Hoffmann KM, Beltrán M, Hatt H, Störtkuhl KF, Werner M, Gisselmann G. Effect of 158 herbal remedies on human TRPV1 and the two-pore domain potassium channels KCNK2, 3 and 9.
J Tradit Complement Med 2020;
10:446-453. [PMID:
32953560 PMCID:
PMC7484967 DOI:
10.1016/j.jtcme.2020.04.005]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 11/22/2022] Open
Abstract
Background and aim
Herbal medicines are used to treat a broad number of maladies. However, the pharmacological profile of most remedies is poorly understood. We investigated the effect of herbal remedies from kampo, traditional Chinese medicine (TCM) and other phytotherapies on human two-pore domain potassium channels (KCNK channels; TREK-1, TASK-1 and TASK-3) as well as the human TRPV1 channel. KCNK channels are responsible for the background potassium current of excitable cells, thus essential for the maintenance of the resting membrane potential. Hence, modulators of KCNK channels are of medical significance, e.g. for the treatment of sleep disorders and pain. The transient receptor potential channel TRPV1 is a pain detector for noxious heat. Agonists of this receptor are still used for the treatment of pain in ectopic applications.
Experimental procedure
We evaluated the effect of 158 herbal remedies on these channels in a heterologous expression system (Xenopus laevis oocytes) using the two-electrode voltage-clamp technique with the aim of increasing the comprehension of their pharmacological profile.
Results and conclusion
Some remedies with modulating effects were identified such as Angelica pubescens (radix), which inhibit TASK-1 and TASK-3 channels. Furthermore, the modulatory effects of the most effective remedies on the two TASK family members TASK-1 and TASK-3 correlate positively, reflecting their close relation. For the TRPV1 channel Terminalia chebula and Alchemilla xanthochlora were identified as potentiators. This study identifies a variety of herbal remedies as modulators of human K2P and TRPV1 channels and gives new insights into the pharmacological profile of these herbal remedies.
Effect of kampo and TCM herbs on human two-pore domain potassium and TRP channels.
Effect of 158 herbal remedies on heterologously expressed ion channels.
Angelica pubescens (radix) extracts inhibit KCNK3 and KCNK9 channels.
Modulatory effects of effective remedies on KCNK3 and KCNK9 correlate positively.
Terminalia chebula and Alchemilla xanthochlora are TRPV1 potentiators.
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