| Autor: |
Park SI; Department of Physiology, Institute of Bioscience and Biotechnology, Interdisciplinary Graduate Program in BIT Medical Convergence, Kangwon National University School of Medicine., Hwang S; Department of Physiology, Institute of Bioscience and Biotechnology, Interdisciplinary Graduate Program in BIT Medical Convergence, Kangwon National University School of Medicine., Kim JH; Department of Physiology, Institute of Bioscience and Biotechnology, Interdisciplinary Graduate Program in BIT Medical Convergence, Kangwon National University School of Medicine., Yang SR; Department of Thoracic and Cardiovascular Surgery, Kangwon National University., Jo SH; Department of Physiology, Institute of Bioscience and Biotechnology, Interdisciplinary Graduate Program in BIT Medical Convergence, Kangwon National University School of Medicine. |
| Jazyk: |
angličtina |
| Zdroj: |
Biological & pharmaceutical bulletin [Biol Pharm Bull] 2023; Vol. 46 (10), pp. 1394-1402. |
| DOI: |
10.1248/bpb.b23-00170 |
| Abstrakt: |
Dimenhydrinate, an H 1 receptor antagonist, is generally used for the prevention and treatment of nausea and vomiting. However, cardiac arrhythmias have been reported to be associated with the overdose of histamine H 1 receptor antagonists, indicating the probable effect of antihistamines on ion channels. By using a two-microelectrode voltage clamp, we have herein studied the electrophysiological effects of dimenhydrinate on the human Kv1.5 channel in the Xenopus oocyte expression system. Dimenhydrinate acutely and reversibly suppressed the amplitudes of the peak and the steady-state current, within 6 min. The inhibitory effect of dimenhydrinate on the peak and the steady-state Kv1.5 currents increased progressively from -10 to +50 mV. At each test voltage, the drug suppressed both the peak and the steady-state currents to a similar extent. When the oocytes were stimulated at the rates of 5- and 30-s intervals, dimenhydrinate-induced a use-dependent blockade of the human Kv1.5 channel. Dimenhydrinate expedited the timecourse of the Kv1.5 channel activation more effectively than the timecourse of its inactivation. However, the activation and inactivation curves of the channel were not altered by the H 1 receptor antagonist. In conclusion, we found that dimenhydrinate inhibits the human Kv1.5 channel by changing the channel's activation mode, thereby possibly increasing the possibility of triggering cardiac arrhythmias and affecting atrial fibrillation. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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