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Background:  Breast cancer is the second leading cause of death in women. Alternative medicine with high efficacy is needed for breast cancer treatments, for example induction of apoptosis using natural products. It has been found that many natural apoptosis-inducing compounds are isolated from marine sponge. The objective of this study is to analyze the ability of extracts of the sponge  Ancorina  sp. to induce apoptosis on human breast cancer T47D cell line and find out its mechanism.    Methods:  T47D cells were treated with crude extracts of methanol, dichloromethane:methanol (1:1) and dichloromethane  Ancorina  sp. for 24 h, and doxorubicin was used as a positive control. Methods used for this study were MTT assay to examine cell viability and determine IC 50  of the three extracts, while the percentage of apoptosis and caspase-3 were investigated by flow cytometry.    Results:  IC 50  values of methanol, dichloromethane:methanol (1:1), and dichloromethane extract were 84.25, 121.45, and 99.85μg/mL respectively. The percentages of apoptotic cells after treatment with methanol, dichloromethane:methanol (1:1), and dichloromethane extracts were 88.68, 27.54 and 53.63% respectively, whereas the percentage of caspase-3 was 77.87, 12.66 and 12.97%, respectively.    Conclusions:  These results revealed that all extracts of  Ancorina  sp. have strong or moderate cytotoxicity and have the ability to induce apoptosis on T47D human breast cancer cell line. However, methanol crude extract has high efficacy to induce apoptosis through caspase-3 activation compared to the other extracts. Hence methanol extract warrants further investigation as a natural medicine for human breast cancer.

Apoptosis induction on human breast cancer T47D cell line by extracts of Ancorina sp.