中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (13): 2022-2027.doi: 10.3969/j.issn.2095-4344.1647

• 肿瘤干细胞 cancer stem cells • 上一篇    下一篇

长链非编码RNA H19促进胃癌干细胞的增殖和转移

夏荣钧1,欧英富1,邢维山2,郑琳琳1,于生金1,林黎娟1   

  1. 1辽东学院分子医学研究室,辽宁省丹东市 118000;2丹东市第一医院肿瘤内科,辽宁省丹东市 118000
  • 修回日期:2018-12-20 出版日期:2019-05-08 发布日期:2019-05-08
  • 通讯作者: 林黎娟,博士,教授,辽东学院分子医学研究室,辽宁省丹东市 118000
  • 作者简介:夏荣钧,男,1978年生,汉族,2008年大连医科大学毕业,实验师,主要从事基础医学研究。
  • 基金资助:

    辽宁省自然科学基金项目(201402081),项目负责人:夏荣钧

Long non-coding RNA H19 promotes proliferation and invasion of gastric cancer stem cells

Xia Rongjun1, Ou Yingfu1, Xing Weishan2, Zheng Linlin1, Yu Shengjin1, Lin Lijuan1   

  1. 1Department of Molecular Medicine, Eastern Liaoning University, Dandong 118000, Liaoning Province, China; 2Department of Medical Oncology, Dandong First Hospital, Dandong 118000, Liaoning Province, China
  • Revised:2018-12-20 Online:2019-05-08 Published:2019-05-08
  • Contact: Lin Lijuan, MD, Professor, Department of Molecular Medicine, Eastern Liaoning University, Dandong 118000, Liaoning Province, China
  • About author:Xia Rongjun, Experimentalist, Department of Molecular Medicine, Eastern Liaoning University, Dandong 118000, Liaoning Province, China
  • Supported by:

    the Natural Science Foundation of Liaoning Province, No. 201402081 (to XRJ)

摘要:

文章快速阅读:

文题释义:
长链非编码RNAs:
是一类长度约为200个核苷酸分子的非编码RNA,不具有编码蛋白质的功能,在转录、转录后水平及表观遗传学等多种层面上调控蛋白的表达,参与肿瘤增殖、凋亡、侵袭和转移等各种恶性生物学行为,近年来在肿瘤领域中为研究热点。
肿瘤干细胞标志基因Sox2:是胚胎发育的关键转录因子,在干细胞形成过程中起着关键的作用,其处于肿瘤干细胞信号调控网络的中心,不仅可调控肿瘤干细胞相关基因Nanog、Oct-3/4、Utf1、Fgf-4及Lefty1的表达,还对维持肿瘤干细胞自我更新、多向分化等干性发挥重要作用,其被确定为致癌基因,促进肿瘤细胞的增殖、侵袭和转移。

 

摘要
背景:
研究发现,干扰长链非编码RNA H19的表达,可以降低胃癌细胞系MGC-803肿瘤球细胞的成瘤能力、增殖和克隆形成能力,而H19在胃癌中是否能通过影响肿瘤干细胞关键标志物Sox2的表达进而调控胃癌干细胞尚不清楚。
目的:研究长链非编码RNA H19在胃癌组织及胃癌干细胞中的表达水平,并探讨其对胃癌干细胞增殖和转移的影响及作用机制。
方法:qRT-PCR检测H19在38例胃癌组织、癌旁组织、胃癌干细胞CSC-G、人永生化正常胃上皮细胞GES-1中的表达;经脂质体分别转染H19 siRNA(si-H19)和阴性对照siRNA(si-NC)48 h后,软琼脂克隆形成实验、MTS实验、Transwell实验检测CSC-G细胞干性、增殖和转移能力,Western blot检测CSC-G细胞中Sox2蛋白的表达。
结果与结论:①qRT-PCR结果显示H19在胃癌组织中的表达显著高于其配对的癌旁组织,且在肿瘤T分期高及有淋巴结转移的组织中高表达(P均< 0.05),同时H19在CSC-G细胞中的表达显著高于GES-1细胞(P < 0.05);②转染H19 siRNA后,CSC-G细胞软琼脂克隆球形成的数目显著减少,细胞增殖能力抑制、细胞侵袭能力减弱、Sox2蛋白表达减少(P均< 0.05);③结果表明,H19在胃癌组织和胃癌干细胞中高表达,H19可能通过作用于干细胞相关蛋白Sox2促进胃癌干细胞的增殖和转移。


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID: 0000-0002-6274-4772(夏荣钧)

关键词: 胃癌, 肿瘤干细胞, 长链非编码RNA H19, 细胞增殖, 细胞转移, 细胞侵袭, 辽宁省自然科学基金

Abstract:

BACKGROUND: Studies have shown that long non-coding RNA H19 can reduce the tumorigenic ability, proliferation and clonality of gastric cancer cell line MGC-803, and it is unclear whether H19 can regulate gastric cancer stem cells through changing the expression of Sox2, a key marker of tumor stem cells. 
OBJECTIVE: To study the expression levels of long non-coding RNA H19 in gastric cancer tissues and gastric cancer stem cells, and to explore its effect on the proliferation and invasion of gastric cancer stem cells and its mechanism of action. 
METHODS: qRT-PCR was used to detect the expression of H19 in lung cancer tissues and paracancerous tissues in 38 cases as well as in gastric cancer stem cells CSC-G and human immortalized normal gastric epithelial cells GES-1. After transfection of H19 siRNA (si-H19) and control (si-NC) for 48 hours by liposome, soft agar cloning assay was used to detect the effect of H19 expression on the stemness of CSC-G cells, MTS assay used to detect the effect of H19 downregulation on CSC-G cell proliferation, and Transwell assay used to detect the effect of H19 downregulation on CSC-G cell metastasis, and western blot assay used to detect the effect of H19 downregulation on Sox2 protein in CSC-G cells. 
RESULTS AND CONCLUSION: (1) The results of qRT-PCR showed that the expression of H19 in gastric cancer tissues was significantly higher than that in the matched paracancerous tissues, and it was highly expressed in tissues with high tumor T stage and lymph node metastasis (P < 0.05), while the expression of H19 in CSC-G cells was significantly higher than that in GES-1 cells (P < 0.05). (2) After transfection of H19 siRNA, the number of soft agar cloned spheres in CSC-G cells was significantly decreased, the cell proliferation and invasion abilities were inhibited and the expression of Sox2 protein was decreased (P < 0.05). In conclusion, H19 is highly expressed in gastric cancer tissues and gastric cancer stem cells. H19 may promote the proliferation and metastasis of gastric cancer stem cells by acting on the stem cell-associated protein Sox2.


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Stomach Neoplasms, Neoplastic Stem Cells, Cell Proliferation, Cell Movement, Tissue Engineering

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