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논문 기본 정보

자료유형
학위논문
저자정보

안진렬 (강원대학교, 강원대학교 대학원)

지도교수
박원선
발행연도
2019
저작권
강원대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

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This study examined the inhibitory effect of flecainide, a class 1c antiarrhythmic agent (Na+ channel blocker), on voltage-dependent K+ (Kv) currents in smooth muscle cells isolated from coronary arteries. Flecainide decreased the vascular Kv current with an IC50 value of 5.90 ± 0.87 μM and a Hill coefficient of 0.77 ± 0.06 in a concentration-dependent manner, respectively. Although flecainide was not affected the activation curve, but affected the inactivation kinetics by shifting the inactivation curve to negative potential. Application of train pulses such as 1 or 2 Hz did not change the flecainide-induced inhibition of Kv channel currents, suggesting that the inhibitory effect of flecainide was not use-dependent. Using perforated-patch clamp experiments, we found that inhibition of Kv channels by flecainide caused membrane depolarization. Together, these results suggest that flecainide inhibits Kv channels in a concentration-dependent, but not use-dependent manner by changing the inactivation gating properties. Furthermore, Kv channel inhibition by flecainide occurs regardless of Na+ channel inhibition.

목차

1. Inhibition of the voltage-dependent K+ current by the class Ic anti-arrhythmic drug flecainide in rabbit coronary arterial smooth muscle cells
I. Abstract…………………………………………1
II. Introduction…………………………………………2
III. Materials and Methods…………………………………………5
IV. Results…………………………………………9
V. Discussion…………………………………………23
VI. References…………………………………………29
Ⅶ. Graphic Abstract…………………………………………35
2. Inhibition of voltage-dependent K+ current in rabbit coronary arterial smooth muscle cells by the class Ic antiarrhythmic drug propafenone
I. Abstract…………………………………………37
II. Introduction…………………………………………38
III. Materials and Methods…………………………………………40
IV. Results…………………………………………45
V. Discussion…………………………………………63
VI. References…………………………………………68
Ⅶ. Graphic Abstract…………………………………………75
Ⅷ. Summary in Korean…………………………………………76
Acknowledgement…………………………………………78

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