龙石银 刘英 杨滢 乔新惠 李娜 仇梦霞 张彩平 田英.二苯乙烯苷通过上调XIAP抑制人脐静脉内皮细胞凋亡[J].现代生物医学进展英文版,2014,14(19):3606-3610. |
二苯乙烯苷通过上调XIAP抑制人脐静脉内皮细胞凋亡 |
TSG Up-regulate XIAP and Inhibit Apoptosisof Human Umbilical Vein Endothelial Cells |
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DOI: |
中文关键词: 二苯乙烯苷 H2O2 人脐静脉内皮细胞 X 连锁凋亡抑制蛋白 Caspase-9 |
英文关键词: TSG Hydrogen peroxide Human umbilical vein endothelial cell X-linked inhibitor of apoptosis protein Caspase-9 |
基金项目:国家自然科学基金项目(30800474);湖南省教育厅项目(11A104);湖南省科技厅项目(2013SK3120);衡阳市科技局项目(2013KJ0 5);
南华大学研究生科研创新项目(2013XCX20);南华大学十二五科技创新团队基金;南华大学留学归国人员启动基金资助 |
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中文摘要: |
目的:二苯乙烯苷(2,3,5,4′ -tetrahydroxystilbene-2-O-beta-D-glucoside,TSG) 具有抗炎、抗氧化、抗动脉粥样硬化
(atherosclerosis,As)等作用。课题组前期研究表明TSG 对过氧化氢(H2O2)诱导损伤的内皮细胞具有保护作用,并抑制内皮细胞的
凋亡,但机制尚未完全明确。本研究目的在于探讨TSG 是否通过影响X 连锁凋亡抑制蛋白(X-linked inhibitor of apoptosis
protein,XIAP)、Caspase-9 的表达来抑制细胞凋亡。方法:体外培养人脐静脉内皮细胞,实验分为正常对照组、模型组(300 umol·L-1
H2O2)、TSG 预处理组(10 umol·L-1 TSG+300 umol·L-1 H2O2)、Embelin 与TSG 联合处理组(30 umol·L-1 Embelin+10 umol·L-1
TSG+300 umol·L-1 H2O2)、TSG 单独处理组(10 umol·L-1 TSG)、Embelin 组(30 umol·L-1 Embelin)。采用MTT 法检测细胞增殖率,
Hoechst 33258染色观察凋亡细胞核形态,RT-PCR 和Western blot 检测XIAP、Caspase-9 的表达。结果:与空白对照组相比,H2O2
组内皮细胞增殖率降低,核损伤明显,XIAP表达显著性下降,Caspase-9 表达显著增加(P<0.01);与H2O2组比较,经TSG 预处理
后,细胞增殖率增加,核损伤减轻,XIAP 的表达上升,Caspase-9 表达减少,差异均有显著性(P<0.01)。与TSG 预处理组比较,用
XIAP阻断剂Embelin 与TSG 联合处理后,内皮细胞活力下降,XIAP表达显著降低,Caspase-9表达增加(P<0.01)。结论:TSG 具
有抑制H2O2诱导的人脐静脉内皮细胞凋亡作用,其机制与增加XIAP 的表达,抑制Caspase-9 的表达有关。 |
英文摘要: |
Objective:To investigate the effect of 2,3,5,4′ -tetrahydroxystilbene-2-O-beta-D-glucoside (TSG) against hydrogen
peroxide (H2O2) induced human umbilical vein endothelial cells (HUVECs) apoptosis and the expressions of X-linked inhibitor of
apoptosis protein (XIAP), Caspase-9.Methods:HUVECs were divided into six groups: control group, H2O2 group (300 umol·L-1), TSG
group (10 umol·L-1 TSG + 300 umol·L-1 H2O2), TSG and Embelin combination group (30 umol·L-1 Embelin + 10 umol·L-1 TSG + 300
umol·L-1 H2O2), TSG alone treatment group (10 umol·L-1), and Embelin group (30 umol·L-1). The viability of HUVECs was determined
with MTT as- say. Hoechst 33258 staining was used to observe the morphology of apoptosis. The mRNA expression of XIAP, Caspase-9
was measured using RT-PCR. The protein expression of XIAP, Caspase-9 was detected by Western blotting.Results:Treatment
HUVECs with H2O2 significantly increased the apoptosis, reduced the cell viability, decreased the expressions of XIAP and elevated
Caspase-9 expression (P<0.01). The expression of XIAP was inhibited by treated with Embelin alone. Compared with H2O2 group, the
apoptosis rate reduced, the cell viability enhanced, the expressions of XIAP increased and Caspase-9 reduced markedly after TSG
pretreated (P<0.01). Combination of Embelin and TSG decreased the cell apoptosis than pretreatment of TSG, and the expression of
XIAP reduced, Caspase-9 increased significantly (P<0.01).Conclusion:TSG could inhibit H2O2-induced apoptosis in HUVECs, and the
mechanismwas associated with the expressions of XIAP and Caspase-9. |
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