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Liu X, Duan X, Fan H, Wang H, Jiang X, Fang Y, Tang Q, Xiao J, Li Q. 8-hydroxypinoresinol-4-O-β-D-glucoside from Valeriana officinalis L. Is a Novel Kv1.5 Channel Blocker. J Ethnopharmacol 2021; 276:114168. [PMID: 33932511 DOI: 10.1016/j.jep.2021.114168] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGY RELEVANCE In folkloric medicine of many cultures, one of the medical uses of Valeriana officinalis Linn is to treat heart-related disease. Recently, it was shown that the ethanol extracts from V. officinalis could effectively prevent auricular fibrillation, and 8-hydroxypinoresinol-4-O-β-D-glucoside (HPG) from the extracts is one of the two active compounds showing antiarrhythmia activities. AIM OF THE STUDY The human Kv1.5 channel (hKv1.5) has potential antiarrhythmia activities, and this study arms at investigating the current blocking effects of HPG on hKv1.5 channel. MATERIAL AND METHODS HPG was obtained from V. officinalis extracts, and hKv1.5 channels were expressed in HEK 293 cells. HPG was perfused while recording the current through hKv1.5 channels. Patch-clamp recording techniques were used to study the effects of HPG at various concentrations (10 μM, 30 μM, and 50 μM) on hKv1.5 channels. RESULTS The present study demonstrated that HPG inhibited hKv1.5 channel current in a concentration-dependent manner; the higher the concentration, the greater is the inhibition at each depolarization potential. During washout, the channels did not full recover indicating that the un-coupling between HPG and hKv1.5 channels is a slow process. CONCLUSION HPG may be an effective and safe active ingredient for AF having translational potential.
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Affiliation(s)
- Xingxing Liu
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Liberty Rd., Wuhan, Hubei, 430022, China
| | - Xueyun Duan
- Pharmaceutical Department, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, 430061, Hubei Province, China
| | - Heng Fan
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Liberty Rd., Wuhan, Hubei, 430022, China
| | - Hongfei Wang
- Department of Cardiac Surgery, Department of Integrated Traditional Chinese Medicine and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Liberty Rd., Wuhan, Hubei, 430022, China
| | - Xionggang Jiang
- Department of Cardiac Surgery, Department of Integrated Traditional Chinese Medicine and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Liberty Rd., Wuhan, Hubei, 430022, China
| | - Ying Fang
- Hubei University of Chinese Medicine, 16 Huangjiahu W Rd, Hongshan, Wuhan, Hubei, 430065, China
| | - Qing Tang
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Liberty Rd., Wuhan, Hubei, 430022, China
| | - Jun Xiao
- The Macrohard Institute of Health, 231 North Ave, Battle Creek, MI, 49017, USA.
| | - Qian Li
- The Macrohard Institute of Health, 231 North Ave, Battle Creek, MI, 49017, USA; The American Academy of Tradition Chinese Medicine Inc., 1925 W County Rd B2, Roseville, MN, 55113, USA.
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