吉林大学学报(医学版) ›› 2024, Vol. 50 ›› Issue (5): 1305-1312.doi: 10.13481/j.1671-587X.20240514

• 基础研究 • 上一篇    

沉默CDC20基因通过抑制Wnt/β-连环蛋白信号通路对子宫内膜癌细胞增殖和细胞周期的影响

刘春静,杨钰杰,赵薇,刘丽晶,王娜()   

  1. 齐齐哈尔医学院附属第三医院妇一科,黑龙江 齐齐哈尔 161000
  • 收稿日期:2023-11-13 出版日期:2024-09-28 发布日期:2024-10-28
  • 通讯作者: 王娜 E-mail:liuchunjing126@126.com
  • 作者简介:刘春静(1979-),女,黑龙江省齐齐哈尔市人,主治医师,主要从事妇科疾病诊治方面的研究。
  • 基金资助:
    黑龙江省卫健委科研项目(20210505010385)

Effect of silencing CDC20 on proliferation and cell cycle of endometrial cancer cells by inhibiting Wnt/β-catenin signaling pathway

Chunjing LIU,Yujie YANG,Wei ZHAO,Lijing LIU,Na WANG()   

  1. Department of Gynecology,Third Affiliated Hospital,Qiqihar Medical College,Qiqihar 161000,China
  • Received:2023-11-13 Online:2024-09-28 Published:2024-10-28
  • Contact: Na WANG E-mail:liuchunjing126@126.com

摘要:

目的 探讨细胞分裂周期蛋白20(CDC20)对子宫内膜癌(EC)细胞增殖和细胞周期的影响,并阐明其作用机制。 方法 实时荧光定量PCR(RT-qPCR)和Western blotting法检测人子宫内膜基质T-HESC细胞和人EC细胞(KLE、RL95-2、ZJB-ENC1和ECC-1细胞)中CDC20 mRNA及蛋白表达水平,选择RL95-2细胞用于后续实验。将CDC20 shRNA干扰慢病毒转染至RL95-2细胞中,分为对照组、sh-NC组(感染阴性对照慢病毒)、sh-CDC20组(感染CDC20 shRNA干扰慢病毒)、sh-NC+SM04690组(感染阴性对照慢病毒后,加入64 nmol·L-1 Wnt/β-连环蛋白信号通路抑制剂SM04690干预48 h)和sh-CDC20+SM04690组(感染CDC20 shRNA干扰慢病毒后,加入64 nmol·L-1 SM04690干预48 h)。RT-qPCR法和Western blotting法检测不同细胞中CDC20 mRNA和蛋白表达水平,CCK-8法检测各组细胞增殖活性,BrdU法检测各组细胞中BrdU阳性细胞百分率,流式细胞术检测各组G2/M期细胞百分率,Western blotting法检测各组细胞中β-连环蛋白、c-Myc和细胞周期素D1蛋白表达水平。 结果 与T-HESC细胞比较,KLE、RL95-2、ZJB-ENC1和ECC-1细胞中CDC20 mRNA和蛋白表达水平均明显升高(P<0.05),其中RL95-2细胞中CDC20 mRNA和蛋白表达水平最高。与sh-NC组比较,sh-CDC20组和sh-NC+SM04690组细胞增殖活性和BrdU阳性细胞百分率明显降低(P<0.05),G2/M期细胞百分率明显升高(P<0.05),细胞中β-连环蛋白、c-Myc和细胞周期素D1蛋白表达水平明显降低(P<0.05)。与sh-CDC20组比较,sh-CDC20+SM04690组细胞增殖活性和BrdU阳性细胞百分率明显降低(P<0.05),G2/M期细胞百分率明显升高(P<0.05),细胞中β-连环蛋白、c-Myc和细胞周期素D1蛋白表达水平明显降低(P<0.05)。 结论 EC细胞中CDC20呈高表达,沉默CDC20可能通过调控Wnt/β-连环蛋白信号转导诱导RL95-2细胞G2/M期阻滞,抑制细胞增殖。

关键词: 子宫内膜癌, 细胞分裂周期蛋白20, 细胞周期, 细胞增殖, Wnt/β-连环蛋白信号通路

Abstract:

Objective To discuss the effect of cell division cycle protein 20 (CDC20) on the proliferation and cell cycle of endometrial carcinoma (EC) cells, and to clarify its mechanism. Methods Real-time fluorescence quantitative PCR(RT-qPCR) and Western blotting methods were used to detect the expression levels of CDC20 mRNA and protein in human endometrial stromal T-HESC cell and EC cells (KLE, RL95-2, ZJB-ENC1, and ECC-1 cells). The RL95-2 cells were selected for the subsequent experiments. CDC20 shRNA interference lentivirus was transfected into the RL95-2 cells and the cells were divided into control group, sh-NC group (infected with negative control lentivirus), sh-CDC20 group (infected with CDC20 shRNA interference lentivirus), sh-NC+SM04690 group (infected with negative control lentivirus followed by treatment with 64 nmol·L?1 Wnt/β-catenin signaling pathway inhibitor SM04690 for 48 h), and sh-CDC20+SM04690 group (infected with CDC20 shRNA interference lentivirus followed by treatment with 64 nmol·L?1 SM04690 for 48 h). RT-qPCR and Western blotting methods were used to detect the expression levels of CDC20 mRNA and proteins in the cells in various groups; CCK-8 method was used to detect the proliferation activities of the RL95-2 cells in various groups; BrdU assay was used to detect the percentages of BrdU positive cells in various groups; flow cytometry was used to detect the percentages of the cells at G2/M stage in various groups; Western blotting method was used to detect the expression levels of β-catenin, oncogene c-Myc, and cyclin D1 proteins in the cells in various groups. Results Compared with T-HESC cells, the expression levels of CDC20 mRNA and protein in the KLE, RL95-2, ZJB-ENC1, and ECC-1 cells were significantly increased(P<0.05), and the highest expression levels of CDC20 mRNA and protein were observed in RL95-2 cells. Compared with sh-NC group, the proliferation activities and percentages of the BrdU positive cells in sh-CDC20 group and sh-NC+SM04690 group were significantly decreased (P<0.05), the percentages of the cells at G2/M phase were significantly increased (P<0.05), and the expression levels of β-catenin, c-Myc, and cyclin D1 proteins were significantly decreased (P<0.05). Compared with sh-CDC20 group, the proliferation activity and percentage of BrdU positive cells in sh-CDC20+SM04690 group were significantly decreased (P<0.05), the percentage of the cells at G2/M phase was significantly increased (P<0.05), and the expression levels of β-catenin, c-Myc, and cyclin D1 proteins in the cells were significantly decreased (P<0.05). Conclusion CDC20 is highly expressed in the EC cells. Silencing CDC20 may inhibit the cell proliferation by inducing G2/M phase arrest in the RL95-2 cells through the regulation of Wnt/β-catenin signal transduction.KEYWODS Endometrial cancer; Cell division cycle protein 20; Cell cycle; Cell proliferation; Wnt/β-catenin signaling pathway

中图分类号: 

  • R737.33