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Novel Approaches for Chemosensitization of Breast Cancer Cells: The E1A Story

  • Chapter
Breast Cancer Chemosensitivity

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 608))

Abstract

The adenoviral E1A-mediated sensitization to a variety of anti-cancer drug-induced apoptosis is a well-established phenomenon on different types of cell systems. However, the mechanisms underlying E1A-mediated chemosensitization are still not fully understood. Recent studies demonstrate that E1A-mediated sensitization to drug-induced apoptosis can occur via multiple pathways; some of which depend on the expression of functional p53 and/or p19ARF proteins, while some are not. In human breast cancer cells with Her-2/neu overexpression, which usually are more resistance to anti-cancer drugs than cells without Her-2/neu overexpression, may be sensitized through E1A-mediated downregulation of Her-2/neu. Alternatively, E1A can induce sensitization to anticancer drugs in cancer cells or normal diploid fibroblast cells through upregulating the expression of caspase proenzymes, or downregulating the activity of a critical survival factor Akt and/or upregulating the activities of a pro-apoptotic kinase p38 and a protein phosphatase PP2A, etc. This review summarizes these progresses and proposes a plausible feed-forward model for E1A-mediated chemosensitization in human breast cancer cells.

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  1. Department of Molecular and Cellular Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, 77030, USA

    Yong Liao, Dihua Yu & Mien-Chie Hung

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  2. Dihua Yu
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  1. Department of Surgical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA

    Dihua Yu

  2. Department of Molecular and Cellular Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA

    Mien-Chie Hung

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Liao, Y., Yu, D., Hung, MC. (2007). Novel Approaches for Chemosensitization of Breast Cancer Cells: The E1A Story. In: Yu, D., Hung, MC. (eds) Breast Cancer Chemosensitivity. Advances in Experimental Medicine and Biology, vol 608. Springer, New York, NY. https://doi.org/10.1007/978-0-387-74039-3_11

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