ERK在TNF-α诱导内皮细胞β-1,4-半乳糖基转移酶-I表达中的作用  

The role of ERK in TNF-α-induced β-1,4-galactosyltransferase-I expression in endothelial cells

作　　者：贲志云[1] 汪晓莺[1] 钱佶[1] 肖锋[1] 季玉红[1] 

机构地区：[1]南通大学医学院免疫学与微生物学教研室,226001

出　　处：《免疫学杂志》2010年第11期930-933,共4页Immunological Journal

基　　金：国家自然科学基金资助项目(30770488)

摘　　要：目的研究细胞外信号调节激酶(extracellular signal-regulated protein kinase,ERK)对肿瘤坏死因子-α(TNF-α)诱导内皮细胞β-1,4-半乳糖基转移酶-I(β-1,4-GalT-I)表达的调节作用。方法用不同浓度的TNF-α刺激人脐静脉内皮细胞(human umbilical vein endothelial cells,HUVECs),并作用不同的时间,检测β-1,4-GalT-I表达变化;应用ERK通路抑制剂U0126预处理HUVECs,再用TNF-α刺激HUVECs,检测β-1,4-GalT-I的表达变化,并通过内皮-单核细胞黏附试验观察HU-VECs黏附能力的改变。结果 TNF-α诱导HUVECsβ-1,4-GalT-I表达增加,且具有剂量和时间依赖关系;U0126显著抑制TNF-α引起的HUVECsβ-1,4-GalT-I表达的上调及其黏附能力的上调。结论 ERK信号转导通路可能参与调节TNF-α诱导的内皮细胞β-1,4-GalT-I的表达,并影响内皮细胞的黏附能力。We aimed to investigate the role of extracellular signal-regulated protein kinase（ERK） in regulating the expression of β-1,4-galactosyltransferase-I（β-1,4-GalT-I） in human umbilical vein endothelial cells（HUVECs） stimulated by tumor necrosis factor（TNF-α）.Cultured HUVECs were stimulated by TNF-α at different concentrations,and for different times.By RT-PCR,we found that β-1,4-GalT-I expression in HUVECs was up-regulated by TNF-α on a concentration and time dependent manner.In another group,cultured HUVECs were pretreated by U0126,an inhibitor of ERK,and then stimulated by TNF-α.We found that U0126 could significantly suppress TNF-α-enhanced expression of β-1,4-GalT-I in HUVECs and adherence ability of HUVECs.Thus,we conclude that ERK signal transduction pathway may participate in regulating β-1,4-GalT-I expression in endothelial cells（EC） stimulated by TNFα and influence the adhesion ability of EC.

关 键 词：细胞外信号调节激酶 TNF-Α β-1 4-半乳糖基转移酶-I 内皮细胞 

分 类 号：R346[医药卫生—基础医学]