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Proto-oncogene ACTR/AIB1 promotes cancer cell invasion by up-regulating specific matrix metalloproteinase expression
Cancer Letters (2008)
  • Li B. Li, Department of Biochemistry and Molecular Medicine, School of Medicine, University of California at Davis
  • Maggie C. Louie, Department of Natural Sciences and Mathematics, Dominican University
  • Hong-Wu Chen, Department of Biochemistry and Molecular Medicine, School of Medicine, University of California at Davis
  • June X. Zou, Department of Internal Medicine, University of California at Davis
Abstract
Overexpression of ACTR/AIB1 is frequently found in different cancers with distant metastasis. To address its possible involvement in tumor metastasis, we performed invasion assays to examine the effect of ACTR alteration on the invasiveness of breast cancer cells (MDA-MB-231 or T-47D) and found that high levels of ACTR are required for their strong invasiveness. Molecular analysis indicates that ACTR functions as a coactivator of AP-1 to up-regulate the expression of matrix metalloproteinases such as MMP-7 and MMP-10 and reduce cell adhesion to specific extracellular matrix proteins. These novel findings provide a mechanistic link between ACTR and MMPs, and suggest that ACTR may also play an important role in cancer progression by facilitating tumor invasion.
Keywords
  • Coactivator,
  • Invasion,
  • Tumor metastasis,
  • Matrix metalloproteinases (MMPs),
  • Matrilysin (MMP-7)
Disciplines
Publication Date
March 8, 2008
Citation Information
Li B. Li, Maggie C. Louie, Hong-Wu Chen and June X. Zou. "Proto-oncogene ACTR/AIB1 promotes cancer cell invasion by up-regulating specific matrix metalloproteinase expression" Cancer Letters Vol. 261 Iss. 1 (2008) p. 64 - 73 ISSN: 0304-3835
Available at: http://works.bepress.com/maggie_louie/7/