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Updated: Jun 14, 2026

Yeast Luminometric and Xenopus Oocyte Electrophysiological Examinations of the Molecular Mechanosensitivity of TRPV4
Published on: December 31, 2013
Effects of protostane-type triterpenoids on the 5-HT3A receptor-mediated ion current in Xenopus oocytes
Jun-Ho Lee1, Yoo-Jin Lee, Seok-Woo Kang
1College of Oriental Medicine, Kyung-Hee University, Hoegi-Dong, Dongdaemun-Ku, Seoul 130-701, Republic of Korea.
Abstract:
Alisol derivatives are unique protostane-type triterpenoid compounds that are isolated from Alismatis rhizoma, which is a well-known traditional medicine in East Asia. In the present study, we investigated the effects of protostane-type triterpenoids (AA, Alisol A; AB, Alisol B; AB-ac, Alisol B 23-acetate; AC-ac, Alisol C 23-aceteate) on 5-HT-induced currents mediated by the human 5-HT(3)A receptor expressed in Xenopus laevis oocytes. Co-treatment with triterpenoids regulated the 5-HT-induced inward peak current in a concentration-dependent and reversible manner. In addition, regulation of I(5-HT) by triterpenoids occurred in a non-competitive manner. Taken together, these results indicate that triterpenoids may regulate the 5-HT(3)A receptors that are expressed in Xenopus oocytes. Furthermore, this regulation of the ligand-gated ion channel activity by triterpenoids may be one of the pharmacological actions of Alismatis rhizoma.
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