芒果苷通过MMP9调控巨噬细胞M2极化对胰腺癌的作用及其机制研究

Research on effect and mechanism of mangiferin on pancreatic cancer by regulating MMP9-mediated macrophage M2 polarization

目的:探讨芒果苷通过MMP9调控M2型巨噬细胞极化治疗胰腺癌的作用及机制。方法:在体内水平绘制肿瘤生长曲线,免疫组化染色评价芒果苷对胰腺癌的治疗效果;免疫荧光、ELISA检测芒果苷对胰腺癌中M2型巨噬细胞表达的影响;免疫荧光、ELISA、Western blot及qRT-PCR检测芒果苷对MMP9以及下游M2型巨噬细胞极化相关信号通路表达的影响。在体外水平利用MTT检测M2型极化巨噬细胞对胰腺癌的作用及芒果苷对胰腺癌的治疗效果;ELISA检测芒果苷对M2型极化巨噬细胞的影响;免疫荧光及Western blot检测芒果苷对MMP9及下游M2巨噬细胞极化相关信号通路表达的影响。结果:小鼠胰腺癌模型中,芒果苷可抑制胰腺癌生长,且可抑制胰腺癌中M2极化巨噬细胞表达;同时芒果苷可抑制胰腺癌中MMP9及下游M2巨噬细胞极化相关信号通路表达。在M2型极化巨噬细胞-胰腺癌细胞共培养模型中,芒果苷抑制胰腺癌细胞增殖,抑制巨噬细胞M2型极化,同时抑制MMP9及下游M2巨噬细胞极化相关信号通路表达。结论:芒果苷可通过抑制MMP9及下游M2巨噬细胞极化相关信号通路抑制巨噬细胞M2极化治疗胰腺癌。

Objective:To investigate effect and mechanism of mangiferin on regulation of M2-type macrophage polarization tar⁃geting MMP9 in pancreatic cancer.Methods:In vivo,therapeutic effect of mangiferin on pancreatic cancer was evaluated by drawing tumor growth curves and immunohistochemical staining.M2-type macrophages expression in pancreatic cancer was detected by immu⁃nofluorescence and ELISA.Effects of mangiferin on expression of MMP9 and downstream M2 macrophage polarization-related signaling pathways were detected by immunofluorescence,ELISA,Western blot and qRT-PCR.In vitro,MTT assay was utilized to detect effect of mangiferin on M2-type macrophage and therapeutic effect of mangiferin on pancreatic cancer.ELISA was used to detect effect of mangiferin on M2-type polarized macrophages.Effects of mangiferin on expression of MMP9 and its downstream signalling pathway were detected by immunofluorescence and Western blot.Results:Mangiferin had potential to inhibit growth of pancreatic cancer in mice pancreatic model,and could prevent expression of M2-polarized macrophages in pancreatic cancer in addition.At the same time,mangiferin could inhibit expression of MMP9 and downstream M2 macrophage polarization related signaling pathways in pancreatic cancer.Mangiferin inhibited proliferation of pancreatic cancer cells in a M2 type polarized macrophage-pancreas cancer cell co-culture model,inhibited macrophage M2 polarization,at the same time,expression of MMP9 and downstream M2 macrophage polarization related signaling pathway was inhibited.Conclusion:Mangiferin can inhibit macrophage M2 polarization by inhibiting MMP9 and its downstream signaling pathway,and play a role in pancreatic cancer therapy.