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  • Title: Low-Dose DMC Significantly Enhances the Effect of TMZ on Glioma Cells by Targeting Multiple Signaling Pathways Both In Vivo and In Vitro.
    Author: Shi L, Sun G.
    Journal: Neuromolecular Med; 2015 Dec; 17(4):431-42. PubMed ID: 26458914.
    Abstract:
    Temozolomide (TMZ) is widely used for treating glioblastoma (GBM), which can effectively inhibit the GBM growth for some months; however, it still cannot prevent the invariable recurrence of GBM. Improving the chemotherapeutic sensitization becomes an urgent agenda. In this study, we found low-dose demethoxycurcumin (DMC) could enhance the sensitivity of TMZ on glioma cells, and high-dose DMC has more significant effects on GBM cells compared with TMZ treatment alone both in vitro and in vivo. And co-administration of DMC and TMZ resulted in a significant increase in GBM apoptosis and a marked inhibition of cell growth pathogenesis of GBM. Mechanistically, DMC and TMZ synergistically increase intracellular level of reactive oxygen species (ROS) production, activate caspase-3-dependent apoptotic pathway, and inactivate of JAK/STAT3 signaling pathway in GBMs, which account for the cell apoptosis and proliferation inhibition. Together, these data implicate that low-dose DMC combined with TMZ represents an effective therapy regimen against GBMs by targeting multiple signaling pathways.
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