Successful treatment of p53 mutant, triple-negative breast cancers (TNBC) remains a daunting challenge. Doxorubicin (DOXO) and cisplatin (CDDP) are standard-of-care treatments for TNBC, but eventually fail due to acquired drug resistance and toxicity. Therefore, new treatments for overcoming drug resistance and toxicity in p53 mutant, TNBC are badly needed. Unlike p53, p73, a member of the p53 family, is usually not mutated in cancers and has been shown to regulate p53 mediated apoptotic signaling in p53 deficient cancers. Therefore, identification of anticancer agents that can activate p73 in p53-deficient cancers may provide a chemotherapeutic approach for treatment of p53 mutant cancers. Here we report on the reconstitution of the p53 tumor suppressor pathway in a p53-independent manner via p73 with combination treatments of alpha-TEA, a small bioactive lipid, plus DOXO or CDDP.
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01/07/11