摘要
目的:探讨晚期糖基化终产物(AGE)对大鼠血管外膜成纤维细胞(AF)中烟酰胺腺嘌呤二核苷酸磷酸(NADPH)氧化酶p22phox亚基及活性氧表达的影响。方法:用组织贴块法培养SD大鼠的血管外膜成纤维细胞,用逆转录—聚合酶链反应、蛋白质印迹检测不同浓度的糖基化人血清白蛋白(AGE-HSA,分为对照组、100μg/ml AGE-HSA组,200μg/ml AGE-HSA组、300μg/ml AGE-HSA组)对NADPH氧化酶p22phox亚基信使核糖核酸(mRNA)及蛋白的表达的影响,并观察不同干预因素[分为对照组1、200μg/ml AGE-HSA组(200μg/ml处理组1)、200μg/ml AGE-HSA+50μg/ml抗RAGE中和抗体组(抗RAGE中和抗体组1)及200μg/ml AGE-HSA+30 nmol/L坎地沙坦组(坎地沙坦组1)对AGE-HSA上调NADPH氧化酶p22phox亚基mRNA和蛋白表达的影响。用2’,7’-二氯荧光黄双乙酸盐检测不同干预因素[空白对照组、AGE-HSA 200μg/ml组(200μg/ml处理组2)、200μg/ml AGE-HSA+50μg/ml抗RAGE中和抗体组(抗RAGE中和抗体组2)、200μg/ml AGE-HSA+30μmol/L夹竹桃素组(夹竹桃组),200μg/ml AGE-HSA+30 nmol/L坎地沙坦组(坎地沙坦组2)对血管外膜成纤维细胞内活性氧表达的影响。结果:3个浓度(100μg/ml、200μg/ml和300μg/ml)的AGE-HSA组均与对照组比较,血管外膜成纤维细胞NADPH氧化酶p22phox亚基mRNA及蛋白的表达随AGE-HSA增加呈浓度依赖性上调;抗RAGE中和抗体组1、坎地沙坦组1比200μg/ml处理组1的p22phox mRNA及蛋白表达降低;抗RAGE中和抗体组2、夹竹桃素组2及坎地沙坦组2比200μg/mlAGE-HSA处理组2血管外膜成纤维细胞内活性氧相对荧光强度降低,上述比较差异均有统计学意义(P<0.05)。结论:AGE-HSA经由RAGE影响活性氧与NADPH氧化酶p22phox亚基的表达上调,活性氧的上调与NADPH氧化酶p22phox亚基表达相关。NADPH氧化酶抑制剂及坎地沙坦可通过下调NADPH氧化酶p22phox亚基的表达减少血管外膜成纤维细胞内活性氧的产生。
Objective: To investigate the effect of advanced glycation end products (AGE) on NADPH oxidase subunit p22phox expression and reactive oxygen species (ROS) production in vascular adventitial fibroblasts (VAF) in rats. Methods : The isolated VAF of SD rats were cultured with the adherent tissue explants method. ①The effect of AGE-HSA on p22phox mRNA and protein expression were measured by RT-PCR and Western-blot with different concentrations of AGE-HSA at 100 μg/ml, 200 μg/ml,300μg/ml and Control group respectively. ②The effect of different reagents on AGE-HSA regulating p22phox mRNA and protein expression were conducted as 200 μg/ml AGE-HSA group,200 μg/ml AGE-HSA + anti-RAGE neu-tralizing antibody group, and 200 μg/ml AGE-HSA + Candesartan group. ③The effect of different reagents on ROS production in AF were measured by ROS assay kit as 200 μg/ml AGE-HSA group,200 μg/ml AGE-HSA + anti-RAGE neutralizing antibody group,200 μg/ml AGE-HSA + Apopcin group,and 200 μg/ml AGE-HSA + Candesartan group. Results: ①Compared with Control group, p22phox mRNA and protein expression were up-regulated by AGE-HSA in a dose- dependent manner. ②Compared with 200 μg/ml AGE-HSA group, p22phox mRNA and protein expression decreased in 200 μg/ ml AGE-HSA + anti-RAGE neutralizing antibody group and 200 μg/ml AGE-HSA + Candesartan group. ③Compared with 200 vg/ml AGE-HSA group,the ROS production in VAF decreased in 200 μg/ml AGE-HSA + anti-RAGE neutralizing antibody group,200 tLg/ml AGE-HSA + Apopcin group,and 200 μg/ml AGE-HSA + Candesartan group. All P〈0. 05. Conclusion: The mRNA and protein expression of p22phox,the ROS production in VAF were up-regulated by AGE-HSA in rats, and those effects could be inhibited by RAGE. NADPH oxidase inhibitors and candesartan can reduce ROS by down-regula- ting p22phox expression.
出处
《中国循环杂志》
CSCD
北大核心
2012年第3期228-231,共4页
Chinese Circulation Journal
关键词
晚期糖基化终产物
晚期糖基化终产物受体
血管外膜成纤维细胞
NADPH氧化酶
P22PHOX
Advanced glycation end-products
Receptor for advanced glycation end products (RAGE)
Vascular adventitial fibroblasts
Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase
Subunit p22phox.