Knockout of interleukin-17A diminishes ventricular arrhythmia susceptibility in diabetic mice via inhibiting NF-κB-mediated electrical remodeling  

作　　者：De-sheng Li Gen-long Xue Ji-ming Yang Chang-zhu Li Rui-xin Zhang Tao Tian Zheng Li Ke-wei Shen Yang Guo Xue-ning Liu Jin Wang Yan-jie Lu Zhen-wei Pan 

机构地区：[1]Department of Pharmacology(State-Province Key Laboratories of Biomedicine Pharmaceutics of China,Key Laboratory of Cardiovascular research,Ministry of Education),College of Pharmacy,Harbin Medical University,Harbin 150081,China

出　　处：《Acta Pharmacologica Sinica》2022年第2期307-315,共9页中国药理学报（英文版）

基　　金：This work was supported by National Key R&D Program of China(2017YFC1307404 to ZP);National Natural Science Foundation of China(82070344,81870295 to ZP 81861128022 to BY);Heilongjiang Touyan Innovation Team Program and CAMS Innovation Fund for Medical Sciences(CIFMS),2019-I2M-5-078(to BY).

摘　　要：Interleukin-17A(IL-17),a potent proinflammatory cytokine,has been shown to participate in cardiac electrical disorders.Diabetes mellitus is an independent risk factor for ventricular arrhythmia.In this study,we investigated the role of IL-17 in ventricular arrhythmia of diabetic mice.Diabetes was induced in both wild-type and IL-17 knockout mice by intraperitoneal injection of streptozotocin(STZ).High-frequency electrical stimuli were delivered into the right ventricle to induce ventricular arrhythmias.We showed that the occurrence rate of ventricular tachycardia was significantly increased in diabetic mice,which was attenuated by IL-17 knockout.We conducted optical mapping on perfused mouse hearts and found that cardiac conduction velocity(CV)was significantly decreased,and action potential duration(APD)was prolonged in diabetic mice,which were mitigated by IL-17 knockout.We performed whole-cell patch clamp recordings from isolated ventricular myocytes,and found that the densities of Ito,INa and ICa,L were reduced,the APDs at 50%and 90%repolarization were increased,and early afterdepolarization(EAD)was markedly increased in diabetic mice.These alterations were alleviated by the knockout of IL-17.Moreover,knockout of IL-17 alleviated the downregulation of Nav1.5(the pore forming subunit of INa),Cav1.2(the main component subunit of ICa,L)and KChIP2(potassium voltage-gated channel interacting protein 2,the regulatory subunit of Ito)in the hearts of diabetic mice.The expression of NF-κB was significantly upregulated in the hearts of diabetic mice,which was suppressed by IL-17 knockout.In neonatal mouse ventricular myocytes,knockdown of NF-κB significantly increased the expression of Nav1.5,Cav1.2 and KChIP2.These results imply that IL-17 may represent a potential target for the development of agents against diabetes-related ventricular arrhythmias.

关 键 词：diabetes mellitus ventricular arrhythmia IL-17 action potential duration transient outward potassium current sodium current L-type calcium current NF-ΚB 

分 类 号：R54[医药卫生—心血管疾病]