瘦素通过上调基质金属蛋白酶14(MMP14)促进MDA-MB-231人乳腺癌细胞的增殖和迁移

Leptin promotes the proliferation and migration of MDA-MB-231 human breast cancer cells by up regulating MMP14

目的 探讨基质金属蛋白酶14(MMP14)在瘦素对MDA-MB-231乳腺癌细胞增殖和迁移的影响。方法 将MDA-MB-231人乳腺癌细胞随机分为对照组和(50、 100、 200、 400)ng/mL瘦素处理组。实时定量PCR和Western blot法分别检测癌细胞MMP14 mRNA及蛋白的表达;沉默MDA-MB-231细胞MMP14和瘦素受体,采用不同浓度瘦素刺激后,噻唑蓝(MTT)法检测细胞增殖情况、划痕实验检测细胞迁移、 Western blot法检测MMP14蛋白的表达。结果 与对照组相比,瘦素处理组MMP14 mRNA和蛋白表达增加且具有剂量依赖性;敲低MMP14和瘦素受体后,瘦素对MDA-MB-231细胞的增殖和迁移及其MMP14蛋白表达的促进作用减弱。结论 瘦素上调MDA-MB-231细胞MMP14的表达,促进癌细胞的增殖和迁移。

Objective To investigate the effect of matrix metalloproteinase 14(MMP14) on the proliferation and migration of MDA-MB-231 human breast cancer cells treated with leptin. Methods MDA-MB-231 breast cancer cells were randomly divided into control group and(50, 100, 200, 400) ng/mL leptin treated groups. Real-time fluorescence quantitative PCR and Western blot were used to detect the expressions of MMP14 mRNA and protein in cancer cells. The MMP14 of MDA-MB-231 cells and leptin receptor genes were silenced and the silenced cells were stimulated with different concentrations of leptin, then cell proliferation was detected by MTT assay, cell migration was detected by scratch assay, and MMP14 protein expression was detected by Western blot. Results Compared with those in the control group, the mRNA and protein expressions of MMP14 increased in a dose-dependent manner in leptin treated groups. After knockdown of MMP14 and leptin receptor genes, the promoting effect of leptin on the proliferation and migration of MDA-MB-231 cells and the expression of MMP14 protein were weakened. Conclusion Leptin up-regulates the expression of MMP14 in MDA-MB-231 cells and promotes cell proliferation and migration.