嗜铬粒蛋白A衍生多肽CGA47-66CGA47酌抑制脓毒症血清所致血管内皮细胞高通透性的研究  被引量:7

A study of inhibitory effect of chromogranin A derived peptide CGA47-66 on hyper-permeability of endothelium induced by serum of septic patient

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作  者:古妮娜[1] 张丹[1] 罗丽[1] 陈晓迎[1] 谢明[1] 刘景仑[1] 姜丽萍[1] 

机构地区:[1]重庆医科大学附属第一医院重症医学科,400016

出  处:《中华危重病急救医学》2013年第12期715-719,共5页Chinese Critical Care Medicine

基  金:国家自然科学基金(81071531);重庆市自然科学基金(csTc2009BB5066)

摘  要:目的观察嗜铬粒蛋白A衍生多肽CGA47-66(Chromfungin,CHR)对脓毒症患者血清引起的血管内皮细胞高通透性的影响。方法分别用CHR、脓毒性休克患者血清、肿瘤坏死因子-α(TNF-α)作用于人脐静脉内皮细胞株EA.hy926,采用四甲基偶氮唑盐(MTT)比色法、Transwell小室法测定EA.hy926的活性[吸光度(A)值]和通透性(A值),免疫荧光法镜下观察细胞纤维肌动蛋白(F—actin)的形态和分布。结果与空白对照组比较,1、10、100nmol/LCHR对EA.hy926细胞活性无明显影响(A值:1.219±0.253、1.179±0.065、1.179±0.062比1.306±0.162,均P〉0.05),而1000nmol/L CHR对EA.hy926细胞活性有显著抑制作用(A值:1.049±0.256比1.306±0.162,f=-2.390,P=0.031)。与空白对照组比较,1、10、100nmol/L CHR作用下EA.hy926细胞通透性明显降低(A值:1.619±0.324、1.496±0.356、1.132±0.280比2.315±0.440,P〈0.05或P〈0.01);脓毒性休克患者血清或TNF—α单独作用下EA.hy926细胞通透性明显升高(血清组A值:1.204±0.248比0.277±0.017,P〈0.01;TNF-α组A值:2.485±0.113比1.602±0.679,P〈0.05);1、10、100nmol/L的CHR既可明显降低脓毒性休克患者血清引起的高通透性(A值:0.299±0.065、0.224±0.028、0.131±0.015比1.204±0.248,均P〈0.01),也可明显降低TNF—α引起的高通透性(A值:1.995±0.394、1.920±0.096、1.744±0.475比2.485±0.113,P〈0.05或P〈0.01),且在1-100nmol/L范围内,CHR的上述作用呈现一定的剂量依赖性。与空白对照组比较,脓毒性休克患者血清或TNF-α单独作用下,F—actin细胞骨架发生明显重组和再分布,应力纤维形成增多,而CHR可以抑制上述变化的发生。结论CHR可以抑制脓毒性休克患者血清引起的血管内皮细胞的高通透性,且呈现一定的剂量依Objective To explore the role ofchromogranin A (CGA) derived peptide CGA47-66 (Chromfungin, CHR) on septic serum induced high permeability of vascular endothelial ceils. Methods Human umbilical venous endothelial cell line (EA.hy926 cells ) was exposed to CHR, serum of septic shock patient, and tumor necrosis faetor-α (TNF-α) respectively. Methyl thiazolyl tetrazolium (MTT) method, Transwell assay and immunofluorescence were performed to determine cell viability (absorbance (A) value], permeability of monotayer endothelial ceils (A value), and the morphological characteristic and distribution of F-actin respectively. Results Compared with the blank control group, when EA.hy926 were exposed to CHR with 1, 10, 100 nmol/L the cell activity was not significantly affected (A value: 1.219 ± 0.253, 1.179 ± 0.065, 1.179 ± 0.062 vs. 1.306 ± 0.162, all P〉0.05), while when the cells was exposed to CHR in 1 000 nmol/L the cell activity was significantly inhibited (A value: 1.049 ± 0.256 vs. 1.306 ± 0.162, t=-2.390, P=0.031 ). Compared with blank control group, when the cells were exposed to CHR of 1, 10, 100 nmol/L a significant decrease in permeability in EA.hy926 cells was observed (A value: 1.619 ± 0.324, 1.496 ±0.356, 1.132 ± 0.280 vs. 2.315 ± 0.440, P〈0.05 or P〈0.01 ). Treatment of septic shock patient's serum or TNF-α to EA. hy926 produced an obvious increase in its permeability (septic serum group A value: 1.204 ± 0.248 vs. 0.277 ± 0.017, P〈 0.01 ; TNF-α group A value : 2.485 ± 0.113 vs. 1.602 ± 0.679, P〈 0.05 ). High-permeability induced by TNF-α or septic shock patient's serum was alleviated by CHR in the concentration of 1, 10, 100 nmol/L in a dose-dependent manner (septic serum + CHR group A value: 0.299 ± 0.065, 0.224 ± 0.028, 0.131 ± 0.015 vs. 1.204 ± 0.248; TNF-α + CHR group A value : 1.995 ± 0.394, 1.920 ± 0.096, 1.744 ± 0.475 vs. 2.485 ± 0.113, P〈0.05 or P〈0.01 ). Under a laser scanning confocal m

关 键 词:嗜铬粒蛋白A 嗜铬粒蛋白A衍生多肽 血管内皮细胞 人脐静脉内皮细胞株EA hy926 内皮细胞通透性 脓毒症 

分 类 号:R459.7[医药卫生—急诊医学]

 

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