中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (11): 1724-1729.doi: 10.3969/j.issn.2095-4344.2014.11.014

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

RNA干扰端粒酶反转录酶基因慢病毒表达载体的构建及鉴定

宋 扬1,徐 韬1,杨明坤2,王国旗1,张恩丰1,盛伟斌1   

  1. 1新疆医科大学第一附属医院脊柱外科,新疆维吾尔自治区乌鲁木齐市 830054;2四川省巴中市中心医院骨科,四川省巴中市 636600
  • 修回日期:2014-02-25 出版日期:2014-03-12 发布日期:2014-03-12
  • 通讯作者: 盛伟斌,博士,教授,主任医师。新疆医科大学第一附属医院脊柱外科,新疆维吾尔自治区乌鲁木齐市 830054
  • 作者简介:宋扬,男,1986年生,陕西省汉中市人,汉族,新疆医科大学第一附属医院在读硕士。
  • 基金资助:

    国家自然科学基金资助项目(81060106)

Construction and identification of recombinant lentivirus expressing small interfering RNA against human telomerase reverse transcriptase gene

Song Yang1, Xu Tao1, Yang Ming-kun2, Wang Guo-qi1, Zhang En-feng1, Sheng Wei-bin1   

  1. 1Department of Spine Surgery, the First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; 2Department of Orthopedics, Bazhong Central Hospital, Bazhong 636600, Sichuan Province, China
  • Revised:2014-02-25 Online:2014-03-12 Published:2014-03-12
  • Contact: Sheng Wei-bin, M.D., Professor, Chief physician, Department of Spine Surgery, the First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • About author:Song Yang, Studying for master’s degree, Department of Spine Surgery, the First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81060106

摘要:

背景:端粒酶反转录酶(telomerase reverse transcriptase,TERT)对端粒酶活化起重要作用,但利用构建针对其基因的慢病毒抑制其在脊髓星形胶质细胞中的表达却少有报道。

目的:构建用于RNA干扰的靶向大鼠脊髓源星形胶质细胞端粒酶反转录酶基因的慢病毒载体,并观察其对端粒酶反转录酶表达的抑制作用。
方法:通过设计合成出shRNA-TERT序列,经聚合酶链反应扩增后定向连接到pLentilox3.7U6载体上构建重组质粒,经转染DH5α细胞筛选阳性菌落后行测序鉴定。将pLentilox3.7U6-TERT重组质粒转染293T细胞,包装产生重组慢病毒Le-TERT并测定其滴度,再用Le-TERT感染大鼠脊髓星形胶质细胞,实时定量-聚合酶链反应检测各细胞株TERT基因表达水平,并利用Western blot和免疫荧光分别检测TERT蛋白的表达。

结果与结论:基因测序鉴定证明,pLentilox3.7U6-TERT重组质粒构建成功,并成功包装慢病毒。实时定量PCR、Western blot和免疫荧光检测结果表明,Le-TERT转染星形胶质细胞4 d后,对TERT mRNA的干扰效率可达(63.98±2.6)%,Le-TERT在转然后的星形胶质细胞中呈低表达。结果证实,实验构建的重组表达载体pLentilox3.7U6-TERT能够产生有效滴度的慢病毒,感染大鼠脊髓星形胶质细胞后,该载体可以有效抑制TERT的表达。



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

关键词: 组织构建, 组织工程, 组织构建基础实验, RNA干扰, 端粒酶, 端粒酶反转录酶, 质粒载体, 慢病毒, 星形胶质细胞, 短发夹RNA, 脊髓损伤, 胶质瘢痕, 国家自然科学基金

Abstract:

BACKGROUND: Telomerase reverse transcriptase (TERT) plays an important role in telomerase activation, however there is rare report addressing the construction of the lentivirus targeted its genes to inhibit its expression in the spinal cord astrocytes.

OBJECTIVE: To construct recombinant lentivirus vector expressing small interfering RNA against TERT gene and to evaluate its potential for inhibiting the TERT expression.
METHODS: After shRNA-TERT sequence was designed and synthesized, the sequence was amplified by PCR and then connected to plasmid pLentilox3.7U6-hTERT to construct recombinant plasmid. The recombinant plasmid was then transfected to DH5α cells to screen positive colony, and the sequence was identified. The recombinant plasmid pLentilox3.7U6-TERT was transfected in 293T cells, generating recombinant lentivirus Le-TERT. The titer of recombinant lentivirus was determined and Le-TERT was transfected into the rat spinal cord astrocytes. The expression of TERT in astrocytes was detected by RT-PCR, western blot and immunofluorescence assay.
RESULTS AND CONCLUSION: The gene sequencing analysis confirmed that, recombinant plasmid pLentilox3.7U6-TERT was successfully constructed. The real-time quantitative PCR, western blot analysis and immunofluorescence assay indicated that, after Le-TERT was transfected in the astrocytes for 4 days, the inhibition rate of TERT mRNA was (63.98±2.6)%, and Le-TERT was lowly expressed in the transfected astrocytes. Recombinant expression vector pLentilox3.7U6-TERT can produce the lentivirus at high titer and effectively inhibit TERT expression in the transfected astrocytes.


中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words:  transfection, gene expression, cells, plasmid

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