Down-regulation of β1,4GalT V at protein level contributes to arsenic trioxide-induced glioma cell apoptosis

被引:22
作者
Wei, Yuanyan [1 ]
Liu, Dan [1 ]
Ge, Yuqing [1 ]
Zhou, Fengbiao [1 ]
Xu, Jiejie [1 ]
Chen, Hong [1 ]
Yun, Xiaojing [1 ]
Gu, Jianxin [1 ]
Jiang, Jianhai [1 ]
机构
[1] Fudan Univ, Shanghai Med Coll, Minist Publ Hlth & Gene Res Ctr, Key Lab Glycoconjuates Res, Shanghai 200032, Peoples R China
关键词
arsenic trioxide; apoptosis; beta 1,4-galactosyltransferase V; N-glycan;
D O I
10.1016/j.canlet.2008.03.019
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Arsenic trioxide (As2O3) has considerable efficacy in treating solid tumors with induction of apoptosis with largely unknown mechanisms. Posttranslational processing of proteins by glycosylation could have multiple regulating roles in the process of apoptosis. Here, we found that the expression of beta 1,6-linked GlcNAc-bearing N-glycans on cell surface protein was gradually decreased after induction of apoptosis by As2O3-treatment. And, As2O3 significantly decreased the protein expression level of beta 1,4GalT V, which effectively galactosylates the beta 1,6-GlcNAc branch of N-glycans and functions as a positive regulator in glioma development. Furthermore, interfering with the expression of beta 1,4GalT V in human glioma cell markedly promoted As2O3-induced cell apoptosis and beta 1,4GaIT V overexpression significantly reduced As2O3-induced glioma cell apoptosis. Taken together, our results suggested that down-regulation of PI,4GaIT V expression plays an important role in As2O3-induced apoptosis, providing a new mechanism of As2O3-induced cell apoptosis and indicating that inhibitors of 01,4GaIT V may enhance the therapeutic efficiency of As2O3 for malignant glioma. (C) 2008 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码:96 / 105
页数:10
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