Abstract
Myocardial ischemia-reperfusion injury (MIRI) can cause myocardial damage. Vaspin can protect against myocardial damage. However, the effect of vaspin on MIRI rats and the expression of NLRP3 remains unclear. Sprague-Dawley rats were separated into sham group; MIRI group and Vaspin group, in which 100 ng/ml vaspin was administrated before model preparation followed by analysis of cardiac function by M-mode ultrasound, level of NLRP3, of type I collagen, IL-6 and TNF-α by ELISA, SOD activity and ROS by spectrophotometry and Bcl-2 and PI3K/AKT signaling protein expression by Western Blot. In MIRI group, left ventricular end-systolic diameter (LVESD), left ventricular mass index (LVMI), left ventricular end-diastolic diameter (LVEDD), NLRP3 expression, contents of type I collagen, IL-6, TNF-α as well as ROS were significantly increased and SOD activity was significantly decreased with decreased Bcl-2 expression and upregulated pAKT and pPI3K (P < 0.05). In Vaspin group, LVESD, LVMI and LVEDD and NLRP3 expression as well as type I collagen, IL-6, TNF-α and ROS was decreased, SOD activity and Bcl-2 expression was significantly increased with downregulated pAKT and pPI3K (P < 0.05). Vaspin can regulate PI3K/AKT signaling pathway, inhibit NLRP3 expression, regulate oxidative stress, inhibit inflammation, reduce apoptosis, improve and improve cardiac function of myocardial ischemia-reperfusion injury in rats.
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