胃癌细胞增殖中长链非编码RNAMEG3产生的具体影响分析
2016-07-25刘婵马东升于林芳
刘婵 马东升 于林芳

[摘要] 目的 分析长链非编码RNAMEG3在胃癌组织中的表达水平,并探讨MEG3过表达对胃癌细胞增殖产生的具体影响。方法 将正常胃组织和细胞作为对照组,将胃癌组织和细胞的MEG3表达水平作为观察组,采用qRT-PCR(定量反转录PCR)技术对观察组的MEG3表达水平进行检测,利用转染pcDNA-MEG3将其上调,检测其转染率。然后将上调后MEG3水平对BGC-823和MGC-803细胞的增殖能力的影响采用MTT实验进行检测,并对两种细胞中的p53蛋白水平进行Western blot检测。结果 (1)用荧光定量PCR测量36例胃癌组织及对应癌旁组织组正常组织中MEG3相对表达水平均存在显著差异,具有统计学意义(P<0.05)。(2)MGC-803和BGC-823细胞经转染pcDNA-MEG3后,MEG3水平和对照组比较,显著上升310和251倍,组间差异具有统计学意义(P<0.05)。(3)经MTT实验,MEG3水平上升后,MGC-803和BGC-823细胞的增殖能力显著下降(P<0.05)。(4)和对照组比较,MGC-803和BGC-823经转染pcDNA-MEG3后,其中p53的表达显著增加(P<0.05)。结论 胃癌组织和细胞中的MEG3下降可以抑制p53蛋白的激活,从而导致胃癌细胞增殖,影响胃癌的发展进程。
[关键词] 胃癌;细胞增殖;长链非编码RNA;MEG3;具体影响
[中图分类号] R735.2 [文献标识码] A [文章编号] 2095-0616(2016)09-21-04
[Abstract] Objective To analyze the long non-coding RNA MEG3 expression levels in gastric cancer and explore MEG3 specific impact on gastric cancer cell proliferation by over-expression. Methods The normal gastric tissues and cells as the control group, the expression levels of gastric carcinoma cells and MEG3 as the observation group, using qRT-PCR(quantitative reverse transcription PCR) technique MEG3 expression levels in the observation group were detected using transfection pcDNA-MEG3 be raised, to detect the transfection efficiency. Then after impact MEG3 raise the level of proliferation of BGC-823 and MGC-803 cells using MTT assay testing, and by Western blot detection of two cells p53 protein levels. Results (1)measuring 36 cases of gastric cancer tissues and the corresponding normal tissues adjacent to cancer tissue groups in the presence of water on average relative expression MEG3 significant difference was statistically significant(P<0.05) with fluorescence quantitative PCR. (2)MGC-803 and BGC-823 cells were transfected with pcDNA-MEG3, compared with a significant increase in the level of the control group MEG3 310 and 251 times the difference between the groups was significantly(P<0.05). (3)By MTT assay, after rising MEG3 level, proliferation MGC-803 and BGC-823 cells was significantly decreased(P<0.05). (4)And the control group, MGC-803 and BGC-823 transfected pcDNA-MEG3, which significantly increased the expression of p53(P<0.05). Conclusion The gastric cancer tissues and cells MEG3 decline can inhibit the activation of p53 protein, leading to gastric cancer cell proliferation and the development process of gastric cancer.
[Key words] Gastric cancer; Cell proliferation; Long chain non encoding RNA; MEG3;Specific effects
经全球相关统计数据显示,胃癌已经成为癌症死亡中的第二杀手,而且随着人们饮食习惯的变化,该病的发生率正逐年上升[1-3]。由于胃癌早期并不具备典型的临床症状,故确诊人数有限,多以进展期的胃癌为主,而且大部分确诊患者会伴随腹
腔内侵袭、转移和淋巴结转移,所以很难取得令人满意的临床治疗效果,预后效果不佳,5年生存率不足1/10[4-6]。正因如此,掌握胃癌的病理机制和分子水平的变化对于发展生物的诊断标志物具有重要意义,可以为胃癌的有效治疗提供科学依据。长链非编码RNA具有很多生物学功能,而且在很多生物进程中具有重要作用。有研究显示[7-8],lncRNA的变异和调节功能异常是导致肿瘤的重要因素,所以确定与癌症密切相关的lncRNA,对其生物和分子学作用进行研究对于肿瘤的研究具有重要意义。……
