SOX7通过靶向调控SHP-2/Wnt/β-catenin/ROS通路抑制结直肠癌细胞增殖、侵袭和迁移

SOX7 inhibits colorectal cancer proliferation,invasion and migration through the SHP-2/Wnt/β-catenin/ROS pathway

目的研究SOX7调控SHP-2/Wnt/β-catenin/ROS通路从而影响结直肠癌细胞增殖、侵袭和迁移的分子机制。方法将20只裸鼠皮下移植瘤模型随机分为SOX7 NC组(n=5)、SOX mimic组(n=5)、SOX7 NC+PHPS1组(n=5)和SOX7 mimic+PHPS1组(n=5),观察肿瘤生长情况。通过脂质体法将人结直肠癌细胞系SW480细胞转染后,将细胞分为6组,分别为SOX7 NC组、SOX7 mimic组、SOX7 NC+H_(2)O_(2)组、SOX7 mimic+H_(2)O_(2)组、SOX7 NC+PHPS1组、SOX7 mimic+PHPS1组。通过Western blot实验检测各组SW480细胞SHP-2/Wnt/β-catenin/ROS通路相关蛋白的表达,通过细胞划痕实验和Transwell侵袭迁移实验检测SW480细胞的侵袭迁移能力,通过CCK-8检测SW480细胞的增殖。结果小鼠体内实验显示:SOX7 mimic组肿瘤体积明显小于SOX7 NC组(P<0.01),经过PHPS1干预的肿瘤体积明显增大,SOX7 mimic+PHPS1组肿瘤体积和SOX7 NC+PHPS1组的差异无统计学意义。体外实验发现:SOX7 mimic抑制了SW480细胞Wnt、β-catenin、NOX2、NOX4、PI3K、P-PI3K、AKT、P-AKT蛋白表达(P<0.01),促进了p-SHP-2蛋白表达(P<0.01);加入H_(2)O_(2)和SHP-2抑制剂后SOX7 mimic组和SOX7 NC组的Wnt、β-catenin、NOX2、NOX4、PI3K、P-PI3K、AKT、P-AKT的蛋白表达水平升高,但差异无统计学意义,SHP-2、p-SHP-2蛋白的表达水平降低,但差异无统计学意义;细胞划痕、Transwell侵袭迁移实验和CCK-8实验结果表明SOX7通过氧化应激和SHP-2通路抑制了SW480细胞的迁移、侵袭和增殖(P<0.01)。结论SOX7可通过靶向SHP-2/Wnt/β-catenin/ROS通路抑制结直肠癌增殖、侵袭和迁移。

Objective To investigate the molecular mechanisms by which SOX7 regulates the SHP-2/Wnt/β-catenin/ROS pathway,affecting the proliferation,invasion,and migration of colorectal cancer cells.Methods Twenty nude mice with subcutaneously transplanted tumor models were randomly divided into four groups:SOX7 NC(n=5),SOX mimic(n=5),SOX7 NC+PHPS1(n=5),and SOX7 mimic+PHPS1(n=5)to observe tumor growth.Human colorectal cancer cell line SW480 cells were transfected via lipofection and divided into six groups:SOX7 NC,SOX7 mimic,SOX7 NC+H_(2)O_(2),SOX7 mimic+H_(2)O_(2),SOX7 NC+PHPS1,and SOX7 mimic+PHPS1.The expression of SHP-2/Wnt/β-catenin/ROS pathway-related proteins in SW480 cells of each group was detected by Western blot.The invasion and migration capabilities of SW480 cells were assessed through scratch and Transwell invasion assays,while cell proliferation was evaluated using CCK-8.Results In vivo experiments demonstrated that tumors in the SOX7 mimic group were significantly smaller than those in the SOX7 NC group(P<0.01).Tumors treated with PHPS1 intervention exhibited a significant increase in volume.There was no statistical significance in the difference in tumor volume between the SOX7 mimic+PHPS1 group and the SOX7 NC+PHPS1 group.In vitro experiments revealed that SOX7 mimic inhibited the expression of Wnt,β-catenin,NOX2,NOX4,PI3K,P-PI3K,AKT,P-AKT proteins(P<0.01),and promoted the expression of p-SHP-2 protein(P<0.01).The addition of hydrogen peroxide and SHP-2 inhibitor reversed the effects of SOX7 on SW480 cells(P<0.05),and significantly promoted the expression levels of Wnt,β-catenin,NOX2,NOX4,PI3K,P-PI3K,AKT,P-AKT proteins,with no significant difference,while significantly reducing the expression levels of SHP-2,p-SHP-2 proteins,with no significant difference.PHPS1 inhibited the expression of SHP-2,p-SHP-2 proteins(P<0.05)and upregulated the expression of Wnt,β-catenin,NOX2,NOX4,PI3K,P-PI3K,AKT,P-AKT proteins(P<0.05).Scratch,Transwell invasion and migration assays,and CCK-8 experiments indicated that SOX7 suppressed the migration,invasion,and proliferation of SW480 cells through oxidative stress and the SHP-2 pathway(P<0.01),while H_(2)O_(2) and PHPS1 intervention promoted the migration,invasion,and proliferation of SW480 cells(P<0.05).Conclusion SOX7 can suppress the proliferation,invasion,and migration of colorectal cancer by targeting the SHP-2/Wnt/β-catenin/ROS pathway.