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The Indole-3-carbinol cyclic tetrameric derivative CTet synergizes with cisplatin and doxorubicin in triple-negative breast cancer cell lines.
Anticancer Research 2013 May
BACKGROUND/AIM: The indole-3-carbinol cyclic tetrameric derivative (CTet) inhibits breast cancer cell proliferation by endoplasmic reticulum stress and autophagy-related cell death induction, AKT/PKB (protein kinase B) activity inhibition and p53-independent overexpression of cyclin-dependent kinase inhibitor-1A (p21/CDKN1A). In the present study we evaluated the synergistic activity of CTet in combination with cisplatin and doxorubicin in triple-negative breast cancer cell lines.
MATERIALS AND METHODS: Synergisms were evaluated in terms of cell viability, induction of autophagy and overexpression of microtubule-associated protein-1 light chain-3 beta (MAP1LC3B) autophagy-related gene in MDA-MB-231 and BT-20 triple-negative breast cancer cells.
RESULTS: We demonstrated that CTet in combination with both cisplatin and doxorubicin synergistically inhibits cell viability and induces autophay. The MAP1LC3B gene was synergistically overexpressed in MDA-MB-231 cells treated with CTet-cisplatin combination. Moreover, the cytotoxic activity of CTet was improved in cells pre-treated with cisplatin and doxorubicin.
CONCLUSION: This preliminary in vitro study confirms the potential of CTet as a chemopreventive agent or chemotherapeutic in combination with standard approaches for triple-negative breast cancer.
MATERIALS AND METHODS: Synergisms were evaluated in terms of cell viability, induction of autophagy and overexpression of microtubule-associated protein-1 light chain-3 beta (MAP1LC3B) autophagy-related gene in MDA-MB-231 and BT-20 triple-negative breast cancer cells.
RESULTS: We demonstrated that CTet in combination with both cisplatin and doxorubicin synergistically inhibits cell viability and induces autophay. The MAP1LC3B gene was synergistically overexpressed in MDA-MB-231 cells treated with CTet-cisplatin combination. Moreover, the cytotoxic activity of CTet was improved in cells pre-treated with cisplatin and doxorubicin.
CONCLUSION: This preliminary in vitro study confirms the potential of CTet as a chemopreventive agent or chemotherapeutic in combination with standard approaches for triple-negative breast cancer.
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