JI Zhao-jie, HAN Lan, WU Huan-ru, et al. Protective Effect and Mechanism of Taohong Siwutang on OGD-induced Injury of Human Brain Microvascular Endothelial Cells[J]. Chinese journal of experimental traditional medical formulae, 2018, 24(7): 95-100.
DOI:
JI Zhao-jie, HAN Lan, WU Huan-ru, et al. Protective Effect and Mechanism of Taohong Siwutang on OGD-induced Injury of Human Brain Microvascular Endothelial Cells[J]. Chinese journal of experimental traditional medical formulae, 2018, 24(7): 95-100. DOI: 10.13422/j.cnki.syfjx.20180627.
Protective Effect and Mechanism of Taohong Siwutang on OGD-induced Injury of Human Brain Microvascular Endothelial Cells
目的:通过建立糖氧剥夺(OGD)诱导的人脑微血管内皮细胞(h-BMECs)损伤模型,观察桃红四物汤对细胞的保护作用及机制。方法:体外建立人脑微血管内皮细胞糖氧剥夺损伤模型,随机分为正常组、模型组、桃红四物汤高、中、低质量浓度组(0.8,0.4,0.2 g ·L-1)和阳性药尼莫地平组。噻唑蓝(MTT)比色法检测h-BMECs细胞活性,酶联免疫吸附法(ELISA)测定细胞上清液中乳酸脱氢酶(LDH)水平、细胞中丙二醛(MDA)含量和超氧化物歧化酶(SOD)活性,采用蛋白免疫印迹法(Western blot)检测内皮细胞血管内皮生长因子(VEGF)和缺氧诱导因子-1α(HIF-1α)表达水平。结果:桃红四物汤可显著提高拟缺血损伤的人脑微血管内皮细胞活性,降低LDH漏出率(P<0.05,P<0.01),改善细胞形态,降低MDA水平(P<0.05),增强SOD活性(P<0.05,P<0.01)。增加内皮细胞VEGF和HIF-α蛋白的表达(P<0.05,P<0.01)。结论:桃红四物汤对拟缺血损伤人脑微血管内皮细胞具有保护作用,其机制与增强细胞抗氧化能力,通过HIF-α途径增强VEGF表达有关,显示中药组方可发挥整体调节的治疗优势。
Abstract
Objective: To investigate the mechanism that Taohong Siwutang (TST) protectshuman brain cerebral microvascular endothelial cells (h-BMECs) injury induced by oxygen-glucose deprivation (OGD). Method: Theh-BMECs injury models were induced by OGD
and then the cells were randomly divided into six groups:normal control group
model group
TST high
middle and low dose (0.8
0.4
0.2 g ·L-1) groups and nimodipine group.3-(4
5-dimethyl-2-thiazolyl)-2
5-diphenyl-2-H-tetrazolium bromide(MTT)staining was employed to assay the activities of h-BMECs; the content of superoxide dismutase(SOD)
malonaldehyde(MDA)in cells
andlactate dehydrogenase (LDH)in cell supernatantwere determined by enzyme-linked immunosorbent assay (ELISA); and the expression levels of hypoxia inducible factor-1α (HIF-α) andvascular endothelial growth factor (VEGF)were detected by Western blot. Result: TST could significantly improve the activities of mimic ischemia injured hMBECs
decrease LDH leakage rate
improve the morphology of h-MBECs obviously
reduce MDA level
enhance SOD activity
and up-regulate the protein expression levels of VEGF and HIF-α. Conclusion: TST has protective effects on OGD-injured h-BMECs
and its mechanism may be related to enhancing the antioxidant capacity
and up-regulating the expression of VEGF and HIF-α
showing the advantages of compound Chinese medicine in integrative regulation.