Host response to cancer signals has emerged as a key factor in cancer development; however, the underlying molecular mechanism is not well understood. In this report, we demonstrate that activating transcription factor 3 (ATF3), a hub of the cellular adaptive response network, plays an important role in host cells to enhance breast cancer metastasis. Immunohistochemical analysis of patient tumor samples revealed that expression of ATF3 in stromal mononuclear cells, but not cancer epithelial cells, is correlated with worse clinical outcomes and is an independent predictor for breast cancer death. This finding was corroborated by data from mouse models showing less efficient breast cancer metastasis in
Chris C. Wolford, Stephen J. McConoughey, Swati P. Jalgaonkar, Marino Leon, Anand S. Merchant, Johnna L. Dominick, Xin Yin, Yiseok Chang, Erik J. Zmuda, Sandra A. O’Toole, Ewan K.A. Millar, Stephanie L. Roller, Charles L. Shapiro, Michael C. Ostrowski, Robert L. Sutherland, Tsonwin Hai
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