丁苯酞对Aβ1-42诱导人脐静脉内皮细胞凋亡的保护作用及机制研究
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篇名: 丁苯酞对Aβ1-42诱导人脐静脉内皮细胞凋亡的保护作用及机制研究
TITLE:
摘要: 目的:研究丁苯酞对β-淀粉样蛋白1-42(Aβ1-42)诱导人脐静脉内皮细胞(HUVEC)凋亡的保护作用及其机制。方法:将HUVEC分为正常对照组、Aβ1-42组、TAK242组(10 nmol/L)、二甲基亚砜(DMSO)组(1‰DMSO)和丁苯酞低、中、高浓度组(40、80、160 μg/L),除正常对照组和DMSO组外,其余各组细胞均加入50 μmol/L Aβ1-42培养HUVEC 24 h,同时TAK242组、DMSO组和丁苯酞低、中、高浓度组细胞还加入相应浓度的药物作用30 min,每个浓度3个复孔。CCK-8法测定细胞活力,Hochest 33342/PI双染法观察细胞凋亡情况,膜联蛋白(Annexin)Ⅴ-异硫氰酸荧光素(FITC)流式细胞仪检测细胞凋亡率,Western blot法检测细胞中果蝇样受体4(TLR4)、环氧合酶2(COX-2)蛋白表达,ELISA法检测细胞中白细胞介素1(IL-1)、肿瘤坏死因子α(TNF-α)含量。结果:与正常对照组比较,Aβ1-42组细胞活力减少、凋亡率增加,TLR4、COX-2蛋白表达和IL-1、TNF-α含量增加;与Aβ1-42组比较,TAK242组和丁苯酞低、中、高浓度组细胞活力增加、凋亡率减少,TLR4、COX-2蛋白表达和IL-1、TNF-α含量减少,差异均有统计学意义(P<0.05或P<0.01)。结论:丁苯酞可改善Aβ1-42所致的HUVEC凋亡,其机制可能与抑制TLR4、COX-2和炎症因子表达有关。
ABSTRACT: OBJECTIVE: To study the protective effect of butylphthalide on the apoptosis of human umbilical vein endothelial cells (HUVECs) induced by Aβ1-42 and its mechanism. METHODS: HUVECs were divided into normal control group, Aβ1-42 group, TAK242 group (10 nmol/L), DMSO group (1‰DMSO) and butylphthalide low-concentration, medium-concentration and high-concentration groups (40, 80, 160 μg/L). Except for normal control group and DMSO group, other groups were given 50 μmol/L Aβ1-42 to culture HUVECs for 24 h. TAK242 group, DMSO group and butylphthalide low-concentration, medium-concentration and high-concentration groups were given relevant concentration of drugs for 30 min, with 3 holes for each concentration. The cell viability was determined by CCK-8 assay; cell apoptosis was observed by Hochest 33342/PI double staining; the cell apoptotic rate was detected by AnnexinⅤ-fluorescein isothiocyanate (FITC) flow cytometry; the protein expression of TLR-4 and COX-2 were determined by Western blot assay; the contents of IL-1 and TNF-α were detected by ELISA. RESULTS: Compared with normal control group, cell viability of HUVECs were decreased in Aβ1-42 group; while apoptotic rate, protein expression of TLR4 and COX-2, the contents of IL-1 and TNF-α were increased. Compared with Aβ1-42 group, cell viability of HUVECs were increased in TAK242 group and butylphthalide low-concentration, medium-concentration and high-concentration groups; while apoptotic rate, protein expression of TLR4 and COX-2, the contents of IL-1 and TNF-α were decreased, with statistical significance (P<0.05 or P<0.01). CONCLUSIONS: Butylphthalide can reduce HUVECs apoptosis induced by Aβ1-42, which may be related with inhibiting the expression of TLR4, COX-2 and inflammatory factors.
期刊: 2017年第28卷第4期
作者: 黄江,姜鲜,宋大强,刘明华,章卓
AUTHORS: HUANG Jiang,JIANG Xian,SONG Daqiang,LIU Minghua,ZHANG Zhuo
关键字: β-淀粉样蛋白1-42;人脐静脉内皮细胞;细胞凋亡;机制
KEYWORDS: Aβ1-42; Human umbilical vein endothelial cells; Cell apoptosis; Mechanism
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