Curcumin Suppresses M2 Macrophage-derived Paclitaxel Chemoresistance through Inhibition of PI3K-AKT/STAT3 Signaling

被引:7
作者
Deswal, Bhawna [1 ,2 ]
Bagchi, Urmi [1 ]
Kapoor, Sonia [1 ]
机构
[1] Amity Univ, Amity Inst Mol Med & Stem Cell Res, Noida 201313, Uttar Pradesh, India
[2] Albany Med Coll, Dept Regenerat & Canc Cell Biol, Albany, NY 12208 USA
关键词
Tumor-associated macrophages; breast cancer; curcumin; chemoresistance; TGF-beta; paclitaxel chemoresistance; TUMOR-ASSOCIATED MACROPHAGES; MICROTUBULE DYNAMICS; CANCER; APOPTOSIS; POLARIZATION; PLASTICITY; CELLS;
D O I
10.2174/0118715206275259231105184959
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Background: Breast cancer is the leading cancer in women worldwide. The development of chemoresistance that leads to recurrence and mortality remains a major concern. M2-type tumor-associated macrophages (TAMs), present in the breast tumor microenvironment, secrete various cytokines and growth factors that induce chemoresistance. Curcumin, isolated from Curcuma longa, is known to sensitize cancer cells and increase the efficacy of standard chemotherapeutic agents. However, the effect of curcumin on the chemoresistance-generating ability of M2 TAMs is not known. Objective: The study aimed to determine whether curcumin could modulate M2 macrophages and suppress their ability to induce resistance to paclitaxel in breast cancer cells. Methods: THP-1 cells were differentiated to M2 macrophages using PMA and IL-4/IL-13 in the presence or absence of curcumin in vitro. The effect of the conditioned medium of M2 macrophages on inducing resistance towards paclitaxel in MCF-7 or MDA-MB-231 cells was analyzed by cell proliferation assay, cell cycle analysis, wound healing and transwell migration assays. RT-PCR analysis was used to determine the mRNA expression of anti-inflammatory cytokines in M2 macrophages. The effect of curcumin on TGF-beta, pAKT, and pSTAT3 in M2 macrophages was analyzed by western blotting. Results: Our data revealed that the M2 macrophages polarized in the presence of curcumin lacked the ability to generate chemoresistance to paclitaxel in breast cancer cell lines. Transcriptomic analysis revealed the expression of TGF-beta to be highest amongst M2 macrophage-secreted cytokines. We observed that purified recombinant TGF-beta generated chemoresistance in breast cancer cells. We found that curcumin treatment abrogated the expression of TGF-beta in M2 macrophages and suppressed their ability to induce chemoresistance in breast cancer cells. STITCH analysis showed strong interaction between curcumin and AKT/STAT3 pathway. Mechanistically, curcumin inhibited PI3K/AKT/STAT3 signaling in M2 macrophages. Western blot analysis revealed that M2 TAM CM, but not curcumin-treated macrophage CM, activated COX2/NF-kappa B in breast cancer cells. Conclusion: Our results showed that curcumin reduced the chemoresistance-generating ability of M2 TAMs. The study has revealed a non-cancer cell-autonomous mechanism by which curcumin partly overcomes the chemoresistance of paclitaxel in breast cancer.
引用
收藏
页码:146 / 156
页数:11
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