实用医学杂志 ›› 2019, Vol. 35 ›› Issue (16): 2522-2526.doi: 10.3969/j.issn.1006-5725.2019.16.002

• 基础研究 • 上一篇    下一篇

长链非编码RNA RP11-356I2.2对胃癌的调控作用研究

李歆1, 冯金鑫2, 杨素冰1, 刘高杰2, 张相良2   

  1. 广州医科大学附属肿瘤医院 1检验科,2腹外科(广州 510095)
  • 收稿日期:2019-02-19 出版日期:2019-08-27 发布日期:2019-08-27
  • 通讯作者: 张相良 E-mail: 513340728@qq.com
  • 基金资助:
    广东省自然科学基金(编号:2017A030313763); 广州市科技计划项目(编号:201607010129)

Regulation of LncRNA RP11-356I2.2 to gastric cancer

LI Xin*, FENG Jinxin, YANG Subing, LIU Gaojie, ZHANG Xiangliang.   

  1. *Tumor Hospital of Guangzhou Medical University, clinical laboratory, Guangzhou 510095, China
  • Received:2019-02-19 Online:2019-08-27 Published:2019-08-27
  • Contact: ZHANG Xiangliang E-mail: 513340728@qq.com

摘要: 目的 观察长链非编码RNA(LncRNA)RP11-356I2.2对胃癌细胞株增殖、侵袭迁移和成瘤的调控作用。方法 采用实时荧光定量PCR(Real-time PCR)法检测RP11-356I2.2在胃癌细胞株BGC-823、SGC-7901细胞和正常胃黏膜细胞株 GES-1 细胞中的表达情况;将胃癌 SGC-7901 细胞分为RP11-356I2.2过表达组、对照组,RP11-356I2.2过表达组转染 SGC-7901过表达质粒,对照组转染空质粒。继续培养 24 h,采用 MTT 法和克隆形成实验观察各组细胞增殖能力,采用Transwell小室实验和细胞划痕实验观察各组细胞迁移能力(结果以穿膜细胞数和划痕愈合率表示)。取 20只约5 周龄的雌性裸鼠,并随机均等分为RP11-356I2.2对照组及过表达组,每组10只裸鼠,分别在其背部皮下注射转染处理后 24 h 的RP11-356I2.2过表达组细胞和空质粒组细胞约1.5 × 106 个,3周后处死小鼠测肿瘤体积。结果 BGC-823、SGC-7901细胞中 RP11-356I2.2的相对表达水平分别是GES-1的(0.45 ± 0.22)、(0.37 ± 0.25)倍,相对表达水平均低于 GES-1细胞(P < 0.05)。SGC-7901/ RP11-356I2.2组的 OD490 值、克隆形成数、穿膜细胞数、划痕愈合率均低于空质粒组(P < 0.05);在裸鼠肿瘤中,SGC-7901/ RP11-356I2.2组和对照组体积分别是(353.93 ± 147.85)mm3、(706.24 ± 253.25)mm3;质量分别是(0.30 ± 0.13) mg、(0.75 ± 0.11) mg。SGC-7901/RP11-356I2.2组裸鼠肿瘤体积和质量均小于对照组(P < 0.05)。结论 胃癌细胞中Lnc RNARP11-356I2.2表达降低, RP11-356I2.2可抑制胃癌细胞增殖、迁移和成瘤。

关键词: RP11-356I2.2, 胃癌, 增殖, 侵袭迁移

Abstract: Objective To observe the effects of longnon-coding RNA(LncRNA) RP11-356I2.2 on proliferation, invasion, migration and tumorigenesis of gastric cancer cell lines. Methods Firstly, real-time fluorescence quantitative PCR(Real-time PCR) was used to detect the expression of RP11-356I2.2 in gastric cancer cell lines BGC-823, SGC-7901 and normal gastric mucosa cell lines GES-1. Secondly, gastric cancer SGC-7901 cells were divided into RP11-356I2.2 overexpression group and control group. RP11-356I2.2 overexpression group was transfected with SGC-7901 overexpression plasmid, while control group was transfected with empty plasmid. Cell proliferation was observed by MTT and clonogenic assay for 24 hours. Cell migration was observed by Transwell chamber test and scratch test (the Results were expressed by the number of penetrating cells and scratch healing rate). Thirdly, twenty five-week-old female nude mice were randomly divided into RP11-356I2.2 overexpression group and control group. Ten mice in each group were injected subcutaneously with cells (1.5×106) transfected with RP11-356I2.2 or empty plasmid for 24 hours. The mice were sacrificed after 3 weeks to measure the tumor volume. Results Firstly, the relative expression levels of RP11-356I2.2 in BGC-823 and SGC-7901 cells were (0.45±0.22) and (0.37±0.25) times of those in GES-1 cells, respectively. The relative expression of RP11-356I2.2 in BGC-823 and SGC-7901 cells was lower than that in GES-1 cells (P < 0.05). Secondly, the OD490 value, cloning number, number of penetrating cells and scratch healing rate in SGC-7901/RP11-356I2.2 group were higher than those in empty plasmid group (P < 0.05). Thirdly, the tumor volume of SGC-7901/RP11-356I2.2 group and control group were (353.93 ±147.85) mm3, (706.24 ± 253.25) mm3, and the mass were (0.30 ± 0.13)mg, (0.75 ± 0.11)mg, respectively. The volume and mass of tumors in SGC-7901/RP11-356I2.2 group were smaller than those in control group (P < 0.05). Conclusion The expression of Lnc RNA RP11-356I2.2 in gastric cancer cells is decreased. RP11-356I2.2 can inhibit the proliferation, migration and tumorigenesis of gastric cancer cells.

Key words: RP11-356I2.2, gastric cancer, proliferation, migration and metastasis