相关实验视频
Updated: Jul 28, 2025

Isolation of Atrial Myocytes from Adult Mice
Published on: July 25, 2019
纳林因通过抑制小鼠心肌细胞中的通道电流来产生抗失律作用
Shi-Han Li1, Guo-Lan Ma1, Shuang-Lin Zhang1
1Institute of Cardiovascular Diseases, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, School of Medicine, Wuhan University of Science and Technology, Wuhan 430065, China.
类黄类的纳林因作为多通道阻塞剂,抑制离子电流,防止心律失常,如室内心动和小鼠心脏动. 这项研究阐明了其抗节律失常的电生理学机制.
科学领域:
- 心血管生理学心血管生理学
- 药理学 药理学是指药理学的学科.
- 电子生理学 电子生理学
背景情况:
- 类植物中的黄类化合物纳林因对心血管有好处.
- 增加黄类药物摄入量可能会减少心律失常的发生率.
- 纳林金抗节律作用的电生理机制尚不清楚.
研究的目的:
- 调查纳林因对小鼠心室肌细胞中跨膜离子通道电流的影响.
- 确定纳林对格登多夫透的小鼠心脏的抗失律作用.
主要方法:
- 全细胞补丁技术用于肌细胞中的作用电位和离子电流.
- 用ATX II诱导早期脱极化后 (EAD) 和用CaCl2.2推迟脱极化后 (DAD).
- 在Langendorff透的小鼠心脏中进行了心电图记录.
主要成果:
- 纳林林缩短了动作潜能持续时间 (APD) 和降低了Vmax.
- 它抑制了L型电流 (ICa.L),晚期电流 (INa.L),峰值电流 (INa·P),延迟整流器电流 (IK) 和短暂的外向电流 (Ito).
- 纳林降低了ATX II诱导的APD延长,EAD和CaCl2诱导的DAD,也降低了隔离心脏中静脉瘤和静脉瘤的发生率.
结论:
- 纳林因在细胞水平上抑制了EAD和DAD.
- 它作为一个多通道阻塞剂,抑制多个离子电流 (INa.L,ICa.L,INa·P,IK,Ito).
- 纳林因表现出显著的抗节律失常作用,可能是通过其多通道阻断活性.
相关概念视频
Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
Antianginal Drugs: Calcium Channel Blockers and Ranolazine
CCBs, a diverse class that includes dihydropyridines (nifedipine) and diphenylalkylamines (verapamil and diltiazem), exert their effect by blocking calcium channels in cardiac and smooth muscle cells. This...
Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers
Mechanism of Cardiac Arrhythmias

