Suppression of tissue factor expression, cofactor activity, and metastatic potential of murine melanoma cells by the N-terminal domain of adenovirus E1A 12S protein

被引:16
作者
Voigtländer, C
Rand, A
Liu, SL
Wilson, TJ
Pittelkow, MR
Getz, MJ
Kelm, RJ
机构
[1] Univ Vermont, Dept Med, Colchester Res Facil, Coll Med, Colchester, VT 05446 USA
[2] Mayo Clin & Mayo Fdn, Program Tumor Biol, Dept Biochem & Mol Biol, Rochester, MN 55905 USA
[3] Mayo Clin & Mayo Fdn, Dept Dermatol, Rochester, MN 55905 USA
关键词
tissue factor; adenovirus E1A; AP-1; Fra-1; melanoma; metastasis;
D O I
10.1002/jcb.10099
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Tissue factor, the cellular initiator of blood coagulation, has been implicated as a determinant of metastatic potential in human melanoma cells. Here, we report that differential expression of tissue factor in murine melanoma cell lines of known metastatic behavior is mediated by AP-1-dependent and 12S E1A oncoprotein-repressible gene transcription. When compared to weakly metastatic C10 cells, highly metastatic M4 cells possessed elevated levels of tissue factor cofactor activity, transfected promoter activity, and heterodimeric AP-1 DNA-binding complexes containing Fra-1. Transient co-expression of the adenovirus El A 12S oncoprotein strongly repressed transcription of an AP-1-driven tissue factor reporter gene indicating the additional requirement of N-terminal El A-interacting coactivators. Stable expression of E1A mutants defective in CBP/p300-binding failed to suppress tissue factor expression and experimental metastasis by M4 cells while clones expressing wild type E1A exhibited greatly reduced tissue factor cofactor activity and metastatic potential in vivo. Overexpression of functional tissue factor in cells containing wild type E1A failed to restore the highly metastatic M4 phenotype suggesting that additional E1A-responsive and CBP/p300-dependent genes are required to facilitate metastasis of murine melanoma cells demonstrating high tissue factor expression and cofactor activity. (C) 2002 Wiley-Liss, Inc.
引用
收藏
页码:54 / 71
页数:18
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