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논문 기본 정보

자료유형
학술저널
저자정보
Minji Kang (Institute of Medical Sciences Department of Physiology Kangwon National University School of Medici) Ryeon Heo (Institute of Medical Sciences Department of Physiology Kangwon National University School of Medici) Seojin Park (Institute of Medical Sciences Department of Physiology Kangwon National University School of Medici) Seo-Yeong Mun (Institute of Medical Sciences Department of Physiology Kangwon National University School of Medici) Minju Park (Institute of Medical Sciences Department of Physiology Kangwon National University School of Medici) Eun-Taek Han (Department of Medical Environmental Biology and Tropical Medicine Kangwon National University Schoo) Jin-Hee Han (Department of Medical Environmental Biology and Tropical Medicine Kangwon National University Schoo) Wanjoo Chun (Department of Pharmacology Kangwon National University School of Medicine Chuncheon 24341 Korea) Kwon-Soo Ha (Department of Molecular and Cellular Biochemistry Kangwon National University School of Medicine Ch) Hongzoo Park (Institute of Medical Sciences Department of Urology Kangwon National University School of Medicine) Won-Kyo Jung (Department of Biomedical Engineering and Center for Marine-Integrated Biomedical Technology (BK21 P) Il-Whan Choi (Department of Microbiology College of Medicine Inje University Busan 48516 Korea) 박원선 (강원대학교)
저널정보
대한약리학회 The Korean Journal of Physiology & Pharmacology The Korean Journal of Physiology & Pharmacology 제26권 제4호
발행연도
2022.7
수록면
277 - 285 (9page)
DOI
10.4196/kjpp.2022.26.4.277

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To investigate the adverse effects of clozapine on cardiovascular ion channels, we examined the inhibitory effect of clozapine on voltage-dependent K+ (Kv) channels in rabbit coronary arterial smooth muscle cells. Clozapine-induced inhibition of Kv channels occurred in a concentration-dependent manner with an halfinhibitory concentration value of 7.84 ± 4.86 μM and a Hill coefficient of 0.47 ± 0.06. Clozapine did not shift the steady-state activation or inactivation curves, suggesting that it inhibited Kv channels regardless of gating properties. Application of train pulses (1 and 2 Hz) progressively augmented the clozapine-induced inhibition of Kv channels in the presence of the drug. Furthermore, the recovery time constant from inactivation was increased in the presence of clozapine, suggesting that clozapineinduced inhibition of Kv channels is use (state)-dependent. Pretreatment of a Kv1.5 subtype inhibitor decreased the Kv current amplitudes, but additional application of clozapine did not further inhibit the Kv current. Pretreatment with Kv2.1 or Kv7 subtype inhibitors partially blocked the inhibitory effect of clozapine. Based on these results, we conclude that clozapine inhibits arterial Kv channels in a concentrationand use (state)-dependent manner. Kv1.5 is the major subtype involved in clozapineinduced inhibition of Kv channels, and Kv2.1 and Kv7 subtypes are partially involved

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