华西口腔医学杂志

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哺乳动物的雷帕霉素靶蛋白及其底物在口腔鳞状细胞癌中的表达

刘 奕1,杨鸣良2,张 扬1,于秉治3   

  1. 1.中国医科大学口腔医院 正畸科;2.中国医科大学口腔医院 口腔外科; 3.中国医科大学基础医学院 生化教研室,辽宁 沈阳110001
  • 收稿日期:2004-08-25 修回日期:2004-08-25 出版日期:2004-08-20 发布日期:2004-08-20
  • 通讯作者: 刘 奕,Tel:024-22891418
  • 作者简介:刘 奕(1964-),女,沈阳人,副主任医师,博士
  • 基金资助:
    973国家基础研究重点资助项目(1999055900-2)

The Expression of mTOR and Its Substrates in Oral Squamous Cell Carcinoma

LIU Yi1,YANG Ming-liang2,ZHANG Yang1,YUBing-zhi3   

  1. 1.Dept.ofOrthodontics,College ofStomatology,China Medical University; 2.Dept.ofOral andMax- illofacial Surgery; 3.Dept.ofBiochemistry,School ofBasic MedicalScience,ChinaMedical University,Shenyang110001,China
  • Received:2004-08-25 Revised:2004-08-25 Online:2004-08-20 Published:2004-08-20

摘要:

目的 探讨哺乳动物的雷帕霉素靶蛋白(mTOR)及其底物对口腔鳞状细胞癌生长的影响。方法 提取 RNA,通过RT-PCR和Western印迹分析观察mTOR及其底物p70 S6激酶(p70 S6k)的α1、α2、β1、β2不同亚型及起始因子4E结合蛋白1(4EBP1)在口腔鳞状细胞癌中的表达。结果 RT-PCR与Western印迹的结果一致。随着肿瘤恶性度的提高,mTOR、p70 S6K的表达明显增加,而4EBP1的表达则下降。结论 mTOR及其底物表达水平的强弱与口腔鳞状细胞癌的分化程度密切相关,它可能成为未来癌症治疗的重要靶向蛋白。

关键词: 哺乳动物的雷帕霉素靶蛋白, p70S6激酶, 口腔鳞状细胞癌

Abstract:

Objective The aim of this study was to observe the expression of mTOR(mammalian target of rapamycin)and its substrates in oral squamous cell carcinoma.Methods mTOR and its substratesα1、α2、β1、β2isoforms of p70 S6 kinase(p70S6k) and 4EBP1 were examined by means of RT-PCR, Western-blot test.Results The result of RT-PCR showed that in poorly differ- entiated tissue, the expression level ofmTOR and its substratesα1、α2、β1、β2isoforms of p70 S6k increased obviously, while that of 4EBP1 decreased, while that in well differentiated tissue was second to it, the normal oral tissue was the last. The expression of Western-blot was the same as the RT-PCR.Conclusion The expression of mTOR and its substrates differs in different types of oral squamous cell carcinoma. The result suggests that mTOR, p70 S6K and 4EBP1 might play important roles in oral squamous cell carcinoma. It may be an important target protein to treat tumor in the future.

Key words: mammalian target of rapamycin, p70 S6kinase, oral squamous cell carcinoma