|Title:||Garcinol sensitizes breast cancer cells to Taxol through the suppression of caspase-3/iPLA<inf>2</inf>and NF-�eB/Twist1 signaling pathways in a mouse 4T1 breast tumor model||Authors:||Tu, S.-H.
|Issue Date:||2017||Journal Volume:||8||Journal Issue:||3||Start page/Pages:||1067-1079||Source:||Food and Function||Abstract:||
Breast cancer is a significant threat to women's health and has high incidence and mortality. Metastasis in breast cancer patients is a major cause of cancer deaths among women worldwide. Clinical experience suggests that patients with metastatic triple-negative breast cancer (TNBC) relapse quickly and often have chemotherapy resistance. Taxol (paclitaxel) is an effective chemotherapeutic agent for treating metastatic breast cancer, but Taxol at high doses can cause adverse effects and recurrent resistance. Thus, the selection of a synergistic combination therapy is recommended, which is safer and has a more significant response rate than monotherapy. In this study, our strategy is to combine a low dose of Taxol (5 mg kg-1, i.p.) and garcinol (1 mg kg-1, i.g.) to investigate the synergistic antitumor and anti-metastasis effects and to determine the underlying mechanisms of these effects in vivo. For the in vivo study, metastasis-specific mouse mammary carcinoma 4T1 cells were inoculated in Balb/c mice to establish an orthotopic primary tumor and spontaneous metastasis model. Tumor growth and metastases were monitored. The mechanisms of synergistic efficacies were evaluated at different signaling pathways, including proliferation, survival, and epithelial-mesenchymal transition (EMT)-regulated metastatic propensity. We demonstrated that garcinol combined with Taxol significantly increased the therapeutic efficacy when compared with either treatment alone. The synergistic antitumor and anti-metastasis effects were enhanced primarily through the induction of Taxol-stimulated G2/M phase arrest and the inhibition of caspase-3/cytosolic Ca2+-independent phospholipase A2 (iPLA2) and nuclear factor-κB (NF-κB)/Twist-related protein 1 (Twist1) drive downstream events including tumor cell repopulation, survival, inflammation, angiogenesis, invasion, and EMT. Our current findings provide the first experimental evidence that a combination of a low dose of Taxol and garcinol is a promising therapeutic strategy for controlling advanced or metastatic breast cancer. Finally, our results also point to the possible role of NF-κB/Twist1 and caspase-3/iPLA2 signaling pathways as biomarkers to predict the tumor response to treatment. ? The Royal Society of Chemistry.
|DOI:||10.1039/c6fo01588c||SDG/Keyword:||Chemotherapy; Enzyme inhibition; Health risks; Mammals; Pathology; Signaling; Tumors; Chemotherapeutic agents; Epithelial-mesenchymal transition; Experimental evidence; Nuclear factor kappaB; Synergistic combinations; Therapeutic efficacy; Therapeutic strategy; Triple-negative breast cancers; Diseases; antineoplastic agent; caspase 3; garcinol; immunoglobulin enhancer binding protein; paclitaxel; phospholipase A2 group VI; Pla2g6 protein, mouse; plant extract; terpene; Twist related protein 1; animal; Bagg albino mouse; Breast Neoplasms; disease model; drug effects; drug potentiation; female; Garcinia; genetics; human; metabolism; mouse; signal transduction; tumor cell line; Animals; Antineoplastic Agents; Breast Neoplasms; Caspase 3; Cell Line, Tumor; Disease Models, Animal; Drug Synergism; Female; Garcinia; Group VI Phospholipases A2; Humans; Mice; Mice, Inbred BALB C; NF-kappa B; Paclitaxel; Plant Extracts; Signal Transduction; Terpenes; Twist-Related Protein 1
|Appears in Collections:||食品科技研究所|
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