SENP-1/HIF-1α通路对慢性间歇性低氧诱导大鼠血管内皮损伤的影响  

Effect of SENP-1/HIF-1αpathway on vascular endothelial injury in rats with chronic intermittent hypoxia

作　　者：贾远航 江义霞 何振华 陈林 周芳 JIA Yuanhang;JIANG Yixia;HE Zhenhua;CHEN Lin;ZHOU Fang(Department of Respiratory and Critical Care Medicine,Second Affiliated Hospital,Hengyang Medical School,University of South China,Hengyang 421001,China)

机构地区：[1]南华大学衡阳医学院附属第二医院呼吸与危重症医学科,湖南衡阳421001

出　　处：《吉林大学学报（医学版）》2024年第4期1026-1034,共9页Journal of Jilin University：Medicine Edition

基　　金：湖南省卫健委科研基金项目(202203024555)。

摘　　要：目的:探讨小泛素样修饰特异性蛋白酶1(SENP-1)/低氧诱导因子1α(HIF-1α)通路对慢性间歇性低氧(CIH)诱导大鼠血管内皮损伤的影响,阐明其相关作用机制。方法:SD大鼠随机分为对照组和CIH组,再将每组分为2、4和6周3个时间点亚组,每亚组8只。CIH组大鼠暴露于CIH舱中进行CIH诱导,制备阻塞性睡眠呼吸暂停低通气综合征(OSAHS)模型,对照组大鼠暴露于常氧环境中。于各时间点收集各组大鼠血清和胸主动脉组织。HE染色观察各组大鼠胸主动脉血管损伤情况,采用酶联免疫吸附试验(ELISA)法检测各组大鼠血清中一氧化氮(NO)、内皮素1(ET-1)、血管性血友病因子(vWF)和血栓调节蛋白(TM)水平,Western blotting法检测各组大鼠胸主动脉组织中SENP-1、HIF-1α和血管内皮生长因子A(VEGFA)蛋白表达水平。体外培养大鼠主动脉内皮细胞(rAECs),经SENP-1 shRNA腺病毒(sh-SENP-1)感染构建SENP-1基因低表达的rAECs细胞株,采用CIH诱导建立血管内皮细胞损伤模型,分为CIH组、CIH+sh-NC组和CIH+sh-SENP-1组,另设对照组。CCK-8检测各组细胞增殖活性,ELISA法检测各组细胞培养上清中乳酸脱氢酶(LDH)活性及细胞中NO、ET-1、丙二醛(MDA)水平和超氧化物歧化酶(SOD)活性,流式细胞术检测各组细胞凋亡率,Western blotting法检测各组细胞中SENP-1、HIF-1α和VEGFA蛋白表达水平。结果:随着CIH诱导时间的延长,与对照组比较,CIH组大鼠胸主动脉内膜逐渐粗糙并明显增厚,血清中NO水平逐渐减低(P<0.05),血清中ET-1、vWF和TM水平及胸主动脉组织中SENP-1、HIF-1α和VEGFA蛋白表达水平逐渐升高(P<0.05)。与对照组比较,CIH组细胞增殖活性降低(P<0.05),细胞培养上清中LDH活性及细胞中ET-1、MDA水平和细胞凋亡率升高(P<0.05),细胞中NO水平和SOD活性降低(P<0.05),SENP-1、HIF-1α和VEGFA蛋白表达水平升高(P<0.05);与CIH组比较,CIH+sh-SENP-1组细胞增殖活性升高(P<0.05),细胞培养上清中LDH�Objective:To discuss the effect of the small ubiquitin-like modifier-specific protease 1(SENP-1)/hypoxia-inducible factor 1α(HIF-1α)pathway on chronic intermittent hypoxia(CIH)-induced vascular endothelial injury in the rats,and to clarify the related mechanism.Methods:The SD rats were randomly divided into control group and CIH group,and then the rats in each group were further divided into 2,4,and 6-week subgroups,and there were 8 rats in each subgroup.The rats in CIH group were exposed to CIH in a CIH chamber to induce CIH and create the obstructive sleep apnea hypopnea syndrome(OSAHS)models,while the rats in control group were exposed to normoxic conditions.The serum and thoracic aorta tissue of the rats in various groups were collected at each time point.HE staining was used to observe the thoracic aorta vascular injury of the rats in various groups;ELISA method was used to detect the levels of nitric oxide(NO),endothelin-1(ET-1),von Willebrand factor(vWF),and thrombomodulin(TM)in serum of the rats in various groups;Western blotting method was used to detect the expression levels of SENP-1,HIF-1α,and vascular endothelial growth factor A(VEGFA)proteins in thoracic aorta tissue of the rats in various groups.In vitro,the aortic endothelial cells(rAECs)of the rats were cultured and infected with SENP-1 shRNA adenovirus(sh-SENP-1)to construct the cell line with low expression of SENP-1.The CIH was used to induce the vascular endothelial cell injury,and the cells were divided into CIH group,CIH+sh-NC group,and CIH+sh-SENP-1 group;control group was set up separately.CCK-8 method was used to detect the proliferation activities of the cells in various groups;ELISA method was used to detect the activities of lactate dehydrogenase(LDH)in the supernatant and the levels of NO,ET-1,malondialdehyde(MDA),and activities of superoxide dismutase(SOD)in the cells in various groups;flow cytometry was used to detect the apoptotic rates of the cells in various groups;Western blotting method was used to detect the expression lev

关 键 词：慢性间歇性低氧 胸主动脉 小泛素样修饰特异性蛋白酶1 低氧诱导因子1Α 血管内皮损伤 

分 类 号：R364.4[医药卫生—病理学]