实用医学杂志 ›› 2022, Vol. 38 ›› Issue (20): 2538-2544.doi: 10.3969/j.issn.1006⁃5725.2022.20.006

• 基础研究 • 上一篇    下一篇

同源域蛋白同源盒基因通过调控Wnt/β⁃catenin 信号通路抑制胃癌细胞的增殖 

凌丽张菁张宗敏令狐熙涛王钰莹   

  1. 遵义医科大学附属医院 1 老年医学科,2 骨科,3 细胞工程室(贵州遵义 563003

  • 出版日期:2022-10-25 发布日期:2022-10-25
  • 基金资助:
    贵州省卫生计生委科学技术基金(编号:gzwjkj 2015⁃1⁃048);遵义市科技计划(编号:遵义市科合社字(2018)82)

HOPX suppress the proliferation of gastric cancer cells via regulating Wnt/β ⁃ catenin signal pathway 

LING Li*ZHANG JingZHANG ZongminLINGHU XitaoWANG Yuying.    

  1. Department of Geriatric Medicinethe Affiliated Hospital of Zunyi Medical CollegeZunyi 563003China

  • Online:2022-10-25 Published:2022-10-25

摘要:

目的 探讨同源域蛋白同源盒基因(HOPX)在胃癌中的表达情况及调控胃癌细胞的增殖能 力及其作用机制。方法 采用 Real time⁃PCR Western blot 检测 HOPX 在胃癌细胞和组织中的 mRNA 及 蛋白表达水平;在胃癌细胞 HGC27 BGC823 中稳定过表达 HOPX 基因,通过 CCK⁃8 法、克隆形成实验、 EdU 法检测 HOPX 对胃癌细胞增殖的影响;采用流式细胞术检测 HOPX 对胃癌细胞细胞周期的调控作用。 另外将用于检测 β⁃catenin/TCF/LEF 可转录活性的荧光素酶报告质粒 TOP flash FOP flash 转染胃癌细胞, 使用双荧光素酶报告系统测定过表达 HOPX 对细胞内荧光素酶转录活性的影响。此外采用 Western blot 分别测定过表达HOPX 对胃癌细胞内β⁃cateninGSK⁃3β p⁃GSK⁃3β 蛋白表达水平的变化。进一步检测过表达 HOPX 后,胃癌细胞核内 β⁃catenin 蛋白表达水平及其下游靶基因 CyclinD1 的表达变化,以探讨 HOPX 影响胃癌细胞增殖的具体机制。结果 Real time⁃PCRWestern blot结果显示HOPX在胃癌中的mRNA及蛋 白表达水平均显著降低,HOPX过表达后可显著抑制胃癌细胞的增殖并抑制其细胞周期。Western blot结果 表明过表达HOPX可通过抑制GSK3β 的磷酸化水平促进β⁃catenin 的降解,从而抑制β⁃catenin 入核,进而下 调下游靶基因 CyclinD1 的表达,达到抑制胃癌细胞的增殖能力。结论 HOPX 通过调控 Wnt/β⁃catenin 信 号通路以抑制胃癌细胞的增殖。

关键词:

HOPX, 胃癌, 增殖, Wnt/β?catenin 通路

Abstract:

Objective To investigate the expression of HOPX in gastric cancer and the ability to regulate the proliferation of gastric cancer cells and its mechanism. Methods HOPX expression in gastric cancer cells and tissues were detected by Real⁃Time PCR and Western Blot. CCK⁃8colony formationEdU and flow cytometry assays were performed to investigate the tumor suppressor gene functions of HOPX in the growth and proliferation capability of gastric cancer cells. In additionTOP flash and FOP flash plasmids were transfected into gastric cancer cellsand the effect of HOPX on the transcriptional activity of β ⁃catenin/TCF/LEF was detected by luciferase reporter assay. Furthermorethe effect of HOPX on the expression of GSK⁃3βp⁃GSK⁃3β and β⁃catenin in gastric cancer cells was detected by Western blot. In order to explore the mechanism of gastric cancer cell proliferation mediated by HOPXwe further detected the expression level of β⁃catenin protein in gastric cancer nucleus and the expres⁃ sion of downstream target gene CyclinD1. Results Real time ⁃PCR and Western blot showed that the expression levels of mRNA and protein of HOPX in gastric cancer were significantly decreasedand the overexpression of HOPX significantly inhibited the proliferation and G1⁃S phase cell⁃cycle transition of gastric cancer cells. Western blot results show that overexpression of HOPX can promote the degradation of β⁃catenin by inhibiting the phosphor⁃ ylation level of GSK3βthus inhibit the entry of β⁃catenin into the nucleusand then down⁃regulate the expression of downstream target gene CyclinD1so as to inhibit the proliferation of gastric cancer cells. Conclusion This study found that overexpression of HOPX inhibits the proliferation of gastric cancer cells by inhibiting Wnt/β⁃catenin signaling pathway. 

Key words:

HOPX, gastric cancer, proliferation, Wnt/β?catenin pathway