Home Bratislava Medical Journal 2015 Bratislava Medical Journal Vol.116, No.1, p.69-73, 2015

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Published Monthly, in English
Founded: 1919
ISSN 0006-9248
(E)ISSN 1336-0345

Impact factor 1.564


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Bratislava Medical Journal Vol.116, No.1, p.69-73, 2015

Title: Tamoxifen and tranilast show a synergistic effect against breast cancer in vitro
Author: S. Darakhshan, A. Ghanbari, F. Gholami Rad, A. Bidmeshki Pour

Abstract: Objective: This study was aimed at examining a separate or combined effect of tamoxifen and tranilast drugs on growth and proliferation of breast cancer cells.
Background: Breast cancer is one of the most common cancers and the second leading cause of cancer death among women worldwide. Tamoxifen is the most widely used anti-estrogen for the treatment of breast cancer. Studies show that a combination therapy with other drugs enhances the activity of tamoxifen. Tranilast is an anti-inflammatory drug. We hypothesize that tranilast plus tamoxifen can work synergistically and help getting better result from this anticancer drug.
Methods: Two breast cancer cell lines, MCF-7 and MDA-MB-231, were treated with graduated concentrations of tamoxifen and tranilast alone or in combination at 24, 48 or 72 hours for MCF-7, and 48 hours for MDA-MB-231 cells. We used the MTT assay and lactate dehydrogenase leakage (LDH) assay to evaluate cell viability and cytotoxicity, respectively.
Results: In both ER-positive and ER-negative breast cancer cell lines, the combination of tranilast and tamoxifen was more effective in growth inhibition than single drug exposure.
Conclusion: We have demonstrated that by means of a synergistic/additive inhibitory effect, tranilast was capable of enhancing the in vitro activity of tamoxifen on breast cancer cell lines. Based on the results obtained in this study, tranilast could be a candidate drug for combination therapy in resistant breast cancer patients (Fig. 9, Ref. 17).

Keywords: breast cancer, Tamoxifen, Tranilast, LDH release, MTT.
Year: 2015, Volume: 116, Issue: 1 Page From: 69, Page To: 73

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