Salusin-β对大鼠胸主动脉血管平滑肌细胞c-fos、c-jun和增殖细胞核抗原表达的影响

摘要

Objective To observe the effect of Salusin-β on c-fos, c-jun and proliferating cell nuclear antigen (PCNA) in vascular smooth muscle cells (VSMCs) of thoracic aorta of rat. Methods Fifty male Wistar rats were randomly divided into normal saline (NS)group (n=25) and Salusin-β group (n= 25) . Rats in Salusin-β group were injected Salusin-β(5nmol/kg) uia the femoral vein, while in NS group were injected equal amount of NS. All the rats were infused with paraform at 0.5, 1, 2, 4 and 24h after the injection, and then the thoracic aortas were harvested. The expressions of c-fos, c-jun and PCNA in VSMCs of rats' thoracic aorta were detected by immunocytochemistry and analyzed by Image-Pro Plus 5.0 image software. Results Compared with NS group, in Salusin-β group, the expression of c-fos at 1h and 2h, of c-jun at 1h, 2h and 4h, and of PCNA at 24h were up-regulated significantly (P＜0.0001). Conclusion Salusin-β may promote the proliferation of VSMCs.%目的 观察Salusin-β对大鼠胸主动脉血管平滑肌细胞(VSMCs)中c-fos、c-jun和增殖细胞核抗原(PCNA)表达的影响.方法 健康雄性Wiser大鼠50只,随机均分为生理盐水(NS)组(n=25)和Salusin-β组(n=25).经股静脉向Salusin-β组大鼠体内注射Salusin-β(5nmol/kg),NS组注射等量生理盐水.分别于0.5、1、2、4、24h后用多聚甲醛灌注大鼠,取其胸主动脉,采用免疫组织化学方法,检测两组大鼠胸主动脉VSMCs中c-fos、c-jun和PCNA的表达情况,使用Image-Pro Plus 5.0图像分析软件对结果进行面积密度分析.结果 Salusin-β组c-fos表达量在1、2h明显高于NS组(P＜0.0001),c-jun表达量在1、2和4h Salusin-β组明显高于NS组(P＜0.0001),PCNA表达量在24h明显高于NS组(P＜0.0001).结论 Salusin-β可促进胸主动脉VSMCs的增殖.