Med Sci Monit:研究揭示骨桥蛋白促进结肠直肠癌转移侵袭的机制

2019-04-29 不详 网络

骨桥蛋白(OPN)是在许多癌症中表达的分子,包括与疾病进展相关的结肠直肠癌(CRC)。然而,促进CRC细胞迁移,侵袭和癌干细胞样细胞(CSC)的OPN的相互作用尚未阐明。因此,本研究旨在探究其中可能涉及的机制。使用实时定量聚合酶链反应和蛋白质印迹监测来自患者的肿瘤组织中OPN的表达。伤口愈合和Transwell测定用于测试在OPN富集环境和OPN敲低条件下细胞迁移和侵袭的差异。根据ALDEFLUO

骨桥蛋白(OPN)是在许多癌症中表达的分子,包括与疾病进展相关的结肠直肠癌(CRC)。然而,促进CRC细胞迁移,侵袭和癌干细胞样细胞(CSC)的OPN的相互作用尚未阐明。因此,本研究旨在探究其中可能涉及的机制。

使用实时定量聚合酶链反应和蛋白质印迹监测来自患者的肿瘤组织中OPN的表达。伤口愈合和Transwell测定用于测试在OPN富集环境和OPN敲低条件下细胞迁移和侵袭的差异。根据ALDEFLUOR TM试剂盒的方案,使用荧光激活细胞分选(FACS)分离醛脱氢酶1(ALDH1)阳性干细胞。通过蛋白质印迹检测蛋白质参与PI3K-Akt-GSK /3β-β/ catenin通路的表达。

结果显示,与非肿瘤正常组织相比,OPN在CRC肿瘤组织中的表达水平升高,其高水平与淋巴转移和晚期TNM分期相关。另外的rhOPN共培养的低表达CRC细胞表现出更强的增殖,迁移和侵袭能力。对于高表达CRC细胞中OPN的敲低,增殖,迁移和侵袭的生物活性被显著抑制。有趣的是,通过OPN抑制,ALDH1标记的干细胞的百分比明显降低。 PI3K-Akt-GSK /3β-β/ catenin通路的磷酸化参与OPN信号传导。此外,特异性PI3K抑制剂Ly294002可逆转rhOPN处理的CRC细胞中生物活性和干细胞比例的促进作用。

总之,该研究结果表明,OPN通过激活PI3K-Akt-GSK/3β-β/catenin通路促进细胞增殖,迁移和侵袭,并伴随着CRC中ALDH1阳性CSC的上调。

原始出处:

Cheng Y, Wen G, et al., Osteopontin Promotes Colorectal Cancer Cell Invasion and the Stem Cell-Like Properties through the PI3K-AKT-GSK/3β-β/Catenin Pathway. Med Sci Monit. 2019 Apr 24;25:3014-3025. doi: 10.12659/MSM.913185.

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