中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (17): 2672-2677.doi: 10.3969/j.issn.2095-4344.2017.17.008

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

RNA干扰TRAP1表达抑制CD133+CD44+喉癌干细胞生长并促进凋亡

薛海涛,苏  静,陈  帅,陈春菊,张继华,田君海,董凯峰   

  1. 河北医科大学第一医院耳鼻咽喉科,河北省石家庄市  050031
  • 修回日期:2017-05-08 出版日期:2017-06-18 发布日期:2017-06-29
  • 通讯作者: 苏静,硕士,主治医师,河北医科大学第一医院耳鼻咽喉科,河北省石家庄市 050031
  • 作者简介:薛海涛,1965年生,河北省阜城县人,汉族,2002年河北医科大学毕业,副主任医师,主要从事鼻科学及咽喉科学研究。
  • 基金资助:

    河北省重点研发计划(152777179),项目名称:TRAP1在人喉鳞癌中的表达及其与化疗抵抗的关系研究

RNA interference targeting inhibition of TRAP1 suppresses cell growth and promotes apoptosis in CD133+CD44+ laryngeal carcinoma stem cells

Xue Hai-tao, Su Jing, Chen Shuai, Chen Chun-ju, Zhang Ji-hua, Tian Jun-hai, Dong Kai-feng   

  1. Department of Otorhinolaryngology, First Hospital of Hebei Medical University, Shijiazhuang 050031, Hebei Province, China
  • Revised:2017-05-08 Online:2017-06-18 Published:2017-06-29
  • Contact: Su Jing, Master, Attending physician, Department of Otorhinolaryngology, First Hospital of Hebei Medical University, Shijiazhuang 050031, Hebei Province, China
  • About author:Xue Hai-tao, Associate chief physician, Department of Otorhinolaryngology, First Hospital of Hebei Medical University, Shijiazhuang 050031, Hebei Province, China
  • Supported by:

    the Key Research and Development Project of Hebei Province, No. 152777179

摘要:

文章快速阅读:

 

文题释义:
RNA干扰技术:
实验应用此技术降低CD133+CD44+喉癌干细胞内TRAP1表达水平,并探讨TRAP1能否作为喉鳞癌治疗的一个特异靶点。研究结果显示RNA干扰靶向抑制CD133+CD44+喉癌干细胞内TRAP1表达能够抑制细胞生长促进肿瘤细胞凋亡。同时也证明TRAP1表达下调促进细胞凋亡是通过提高细胞内caspase-3,caspase-8,caspase-9活性来完成的。靶向TRAP1信号通路或许是治疗喉鳞癌的一个潜在治疗靶点。
细胞凋亡:指为维持内环境稳定,由基因控制的细胞自主、有序的死亡。细胞凋亡与细胞坏死不同,细胞凋亡不是一件被动的过程,而是主动过程,它涉及一系列基因的激活、表达以及调控等作用,它并不是病理条件下,自体损伤的一种现象,而是为更好地适应生存环境而主动争取的一种死亡过程。
 

摘要
背景:肿瘤坏死因子受体相关蛋白1(TRAP1)是线粒体特异性热休克蛋白90家族的同源基因。大量研究表明其过量表达与多种癌症的发生密切相关。但其在喉鳞癌发生中的作用及作用机制目前还不清楚。
目的:探讨RNA干扰能否靶向抑制TRAP1过表达以及对人喉癌干细胞增殖和凋亡的作用效果。
方法:采用免疫磁珠技术从人喉癌Hep-2细胞系中分选出CD133+CD44+喉癌干细胞。设计及合成TRAP1的shRNA序列,LipofectamineTM 2000转染CD133+CD44+喉癌干细胞。CCK-8增殖实验、集落形成实验、流式细胞术检测干扰TRAP1基因表达对CD133+CD44+喉癌干细胞增殖和凋亡的影响,采用分光光度法检测细胞内caspase-3,caspase-8,caspase-9活性。

结果与结论:①TRAP1 shRNA转染的CD133+CD44+喉癌干细胞内TRAP1基因和蛋白表达明显下调(P < 0.01);②与空白对照组和转染空质粒阴性对照组比较,TRAP1表达下调抑制了CD133+CD44+喉癌干细胞增殖和集落形成能力(P < 0.05);③与空白对照组和转染空质粒阴性对照组比较,TRAP1表达下调增加CD133+CD44+喉癌干细胞凋亡率(P < 0.05);④TRAP1 shRNA介导细胞凋亡与caspase-3,caspase-8 和caspase-9激活有关;⑤结果提示RNA干扰TRAP1表达可抑制CD133+CD44+喉癌干细胞生长并促进细胞凋亡。TRAP1可能为喉鳞癌治疗的基因靶点。

 

 

ORCID: 0000-0002-4039-3713(苏静)

关键词: 干细胞, 肿瘤干细胞, 喉鳞癌, CD44, CD133, TRAP1, RNA干扰, 细胞凋亡, 细胞增殖

Abstract:

BACKGROUND: Tumor necrosis factor-associated protein 1 (TRAP1) is a heat-shock protein 90-related mitochondrial chaperone. Accumulative evidence has demonstrated that TRAP1 overexpression is closely related to carcinogenesis. However, the exact function and mechanism of TRAP1 in the occurrence of laryngeal carcinoma remains unclear.

OBJECTIVE: To investigate whether RNA interference can inhibit TRAP1 overexpression and to explore its effects on growth and apoptosis of CD133+CD44+ laryngeal carcinoma stem cells.
METHODS: CD133+CD44+ laryngeal carcinoma stem cells were sorted from human laryngeal carcinoma Hep-2 cells using immunomagnetic beads. The shRNA sequence of TRAP1 was designed and synthesized and CD133+CD44+ laryngeal carcinoma stem cells were transfected with LipofectamineTM 2000. Cell counting kit-8 assay, colony formation assay and flow cytometry were used to investigate the effects of interference of TRAP1 expression on growth and apoptosis of CD133+CD44+ laryngeal carcinoma stem cells. Spectrophotometric method was used to detect the activity of caspase-3, -8 and -9.

RESULTS AND CONCLUSION: TRAP1 mRNA and protein expression levels were significantly decreased in TRAP1 shRNA-transfected CD133+CD44+ laryngeal carcinoma stem cells (P < 0.01). Compared with the blank control and negative control groups, the growth and colony formation of CD133+CD44+ laryngeal carcinoma stem cells were significantly inhibited in the TRAP1 shRNA-transfected group (P < 0.05). Apoptosis of CD133+CD44+ laryngeal carcinoma stem cells was significantly inhibited in the TRAP1 shRNA-transfected group as compared with the blank control and negative control groups (P < 0.05). TRAP1 shRNA-mediated cell apoptosis was associated with the activation of caspase-3, -8 and -9. These results suggest that RNA interference targeting inhibition of TRAP1 suppresses cell growth but promotes apoptosis in CD133+CD44+ aryngeal carcinoma stem cells. TRAP1 is likely to be a gene target for treatment of laryngeal carcinoma.

 

 

Key words: Neoplastic Stem Cells, Laryngeal Neoplasms, Tumor Necrosis Factor Receptor-Associated Peptides and Proteins, RNA Interference, Tissue Engineering

中图分类号: