Effects of pretreatment with nicorandil on PDCD4/NF-κB/TNF-α pathway in coronary microembolization
10.3760/cma.j.issn.1671-0282.2018.10.004
- VernacularTitle:尼可地尔预处理对冠状动脉微栓塞PDCD4/NF-κB/TNF-α通路的影响及意义
- Author:
Qiang SU
1
;
Lang LI
;
Yuhan SUN
;
Ziliang YE
;
Xuefei YANG
;
Binghui KONG
Author Information
1. 广西医科大学第一附属医院心内科 广西心血管病研究所
- Keywords:
Coronary vessels;
Embolism;
Nicorandil;
Programmed cell death 4;
Nuclear facotr-κappa B;
Tumor necrosis factor α;
Inflammation;
Myocardial damage
- From:
Chinese Journal of Emergency Medicine
2018;27(10):1083-1088
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the role of nicorandil pretreatment on protecting myocardium after coronary microembolization (CME) and on the PDCD4/NF-κB/TNF-α signaling pathway in miniature pigs. Methods Fifteen Bama miniature pigs were randomly(random number) divided into the sham operation group (sham group), microembolization group (CME group) and CME plus nicorandil group, with 5 pigs in each group. The CME model was constructed by injecting polyethylene microspheres via microcatheter into the left anterior descending artery, and pigs in the sham group were injected with the same amount of saline. Pigs in the CME plus nicorandil group were injected intravenously with nicorandil (150 μg/kg) via ear vein 30 min before CME. Cardiac function indexes were measured using cardiac ultrasonography. The expression of PDCD4 and TNF-α mRNA in myocardium were detected by fluorescence quantitative PCR, and the protein expression of PDCD4 and TNF-α in myocardium were detected by Western blotting. NF-κB activation was evaluated by electrophoretic mobility shift assay. Results (1) Cardiac function was significantly lower and the level of serum cTnI was significantly higher in the CME group compared with the sham group. CME reduced myocardial systolic dysfunction and left ventricular dilatation. The CME plus nicorandil group showed improved CME-induced cardiac function and reduced serum cTnI level when compared with the CME Group (P < 0.05). (2) Compared with the CME group, the CME plus nicorandil group showed lower PDCD4 and TNF-α expression and NF-κB activity as well as improved cardiac function (P < 0.05). Conclusions The pretreatment of nicorandil effectively reduced the myocardial damage caused by CME, mainly through inhibiting the PDCD4/NF-κB/TNF-α pathway in cardiomyocytes.
