Mechanism of apoptotic induction in human breast cancer cell, MCF-7, by an analog of curcumin in comparison with curcumin--an in vitro and in silico approach

Chemico-biological Interactions
Kumaravel MohankumarRukkumani Rajagopalan

Abstract

In developing countries, survival rates for breast cancer are poor and it accounts for 22.9% of all cancers in women. Curcumin, a major constituent from turmeric, is one of the well-known chemopreventive agents. Reports have shown that curcumin induces apoptosis in breast cancer cells. We synthesized an ortho-hydroxy substituted analog of curcumin (BDMC-A) and analyzed its cytotoxicity. The BDMC-A inhibited MCF-7 at a dose equivalent to that of curcumin (30 μM). The present study was aimed at delineating the apoptotic mechanism of BDMC-A in comparison to that of curcumin. In our study, BDMC-A exerted more potent effect on the modulation of selective apoptotic markers (intrinsic pathway: p53, Bcl-2, Bax, cyt c, Apaf-1, caspase-9, 3, PARP; extrinsic pathway: FasL, caspase 8) compared to curcumin. mRNA expression studies for Bcl2/Bax also supported the increased efficacy of BDMC-A. An in silico molecular docking study with PI3K revealed that the docking of BDMC-A was more potent compared to curcumin. Increased apoptotic induction by BDMC-A compared to curcumin was also demonstrated by Annexin V, Rh123 (ΔΨm), PI, Hoechst 33258, AO/EB fluorescent staining studies which showed characteristic apoptotic features like nuclear fragmentat...Continue Reading

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