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  • Title: Curcumin synergistically increases effects of β-interferon and retinoic acid on breast cancer cells in vitro and in vivo by up-regulation of GRIM-19 through STAT3-dependent and STAT3-independent pathways.
    Author: Ren M, Wang Y, Wu X, Ge S, Wang B.
    Journal: J Drug Target; 2017 Mar; 25(3):247-254. PubMed ID: 27677346.
    Abstract:
    OBJECTIVE: The study aimed to investigate the effects of combination treatment of curcumin and β-interferon (IFN-β)/retinoic acid (RA) on breast cancer cells, including cell viability, apoptosis and migration, and to determine the mechanisms related to GRIM-19 through STAT3-dependent and STAT3-independent pathways. METHODS: The following groups were used for the in vitro experiment: control siRNA, GRIM-19 siRNA, IFN-β/RA and IFN-β/RA + curcumin. Cell viability is by the MTT method, cell apoptosis by flow cytometry and cell migration by wound healing experiment; GRIM-19, STAT3, survivin, Bcl-2, GADD153 and COX-2 expression was measured by Western blot. In vivo experiment, MCF-7 cells were subcutaneously injected into nude mice. RESULTS: GRIM-19 siRNA promoted MCF-7 cell proliferation and migration; inhibited cell apoptosis; and promoted the expression of STAT3, survivin, Bcl-2 and MMP-9. IFN-β/RA inhibited cell proliferation and migration; promoted cell apoptosis; up-regulated GRIM-19; and inhibited the expression of STAT3, survivin, Bcl-2 and MMP-9. Combination treatment of curcumin and IFN-β/RA had a stronger effect than that of the IFN-β/RA group. In addition, curcumin and IFN-β/RA combination inhibited the expression of COX-2 and up-regulated GADD153. CONCLUSION: Curcumin synergistically increases the effects of IFN-β/RA on breast cancer cells. The mechanism may be related to the up-regulation of GRIM-19 through STAT3-dependent and STAT3-independent pathways.
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