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Zhong xi yi jie he xue bao = Journal of Chinese integrative medicine 2012-Oct

Synergistic effects of ethyl acetate fraction of Ficus septica Burm. f. and doxorubicin chemotherapy on T47D human breast cancer cell line.

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Agung E Nugroho
Adam Hermawan
P Putri D
Edy Meiyanto
Lukman Hakim

Cuvinte cheie

Abstract

OBJECTIVE

Previously, ethanolic extract of Ficus septica Burm. f. (Moraceae) leaves and its ethyl acetate soluble fraction (EASF) exhibited potent cytotoxic effects on T47D breast cancer cells. In the present study, we further investigated the effects of EASF of ethanolic extract of F. septica leaves in combination with doxorubicin on T47D breast cancer cell line in cytotoxicity, cell cycle arrest and apoptosis induction.

METHODS

The cytotoxic effect analysis on T47D cells was carried out using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Analysis of cell cycle distribution was performed using a flowcytometer and the data were analyzed using ModFit LT 3.0 program. Apoptosis assay was carried out by double staining method using ethidium bromide-acridin orange. The expression of cleaved-poly ADP-ribose polymerase in the T47D cell line was identified using immunohistochemical techniques.

RESULTS

The combination of doxorubicin (2 to 8 nmol/L) with EASF (0.875 to 7 μg/mL) more potently inhibited cell growth than the single treatment of doxorubicin in T47D cells. In addition, the combination of doxorubicin and EASF could increase the incidence of cells undergoing apoptosis. EASF was found to improve cytotoxic effect of doxorubicin by changing the inhibition of cell cycle G(2)/M to G(1) phase. The combination also exhibited a more intensive stimulatory effect on cleaved-PARP expression in T47D cells than the single treatment.

CONCLUSIONS

It is concluded that EASF may enhance doxorubicin activities in T47D cells by inducing apoptosis and cell cycle arrest.

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