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Smad蛋白在乳腺癌和正常乳腺上皮细胞中的表达及意义

陈志明1,2, 曹红十3, 李荣贵1,史艳芬1,孙 梅1,李玉林1   

  1. 1.吉林大学基础医学院 病理生物学教育部重点实验室,吉林 长春 130021;2.吉林大学基础医学院法医学教研室,吉林 长春 130021;3.吉林大学第一医院护理部,吉林 长春 130021
  • 收稿日期:2008-01-18 修回日期:1900-01-01 出版日期:2009-01-28 发布日期:2009-01-28
  • 通讯作者: 李玉林

Expression of Smad in breast cancer cells and normal breast epithelium cells and significance

CHEN Zhi-ming1,2,CAO Hong-shi3,LI Rong-gui1,SHI Yan-fen1,SUN Mei1,LI Yu-lin1   

  1. 1.Key Laboratory of Pathobiology,Ministry of Education,School of Basic Medical Sciences,Jilin University, Changchun 130021,China;2. Department of Forensic Medicine,School of Basic Medical Sciences,Jilin University,Changchun 130021,China;3. Department of Nursing,First Hospital,Jilin University,Changchun 130021,China
  • Received:2008-01-18 Revised:1900-01-01 Online:2009-01-28 Published:2009-01-28
  • Contact: LI Yu-lin

摘要: 目的:检测TGFβ1、TGFβ受体Ⅱ及其下游Smad调节因子等基因在乳腺癌和正常乳腺上皮细胞中的表达,探讨TGFβ在乳腺癌发展过程中发挥作用的分子机制。方法:分离纯化人正常乳腺上皮细胞,应用RT-PCR检测乳腺癌细胞系MCF7及正常乳腺上皮细胞中TGFβ1、TGFβ受体Ⅱ、Smad4、Smad6、Smad7的表达。结果:TGFβ1、TGFβ受体Ⅱ、Smad6、Smad7与内参照GAPDH比值在正常乳腺上皮细胞中(0.721±0.214、1.001±0.312、0.689±0.12和0.221±0.124)与MCF7细胞(0.698±0.324、0.998±0.217、0.718±0.257;0.246±0.138)比较表达水平差异无显著性,Smad4在乳腺癌细胞中的表达水平(0.498±0.221)低于正常乳腺上皮细胞(1.132±0.314)(P<0.05)。结论:Smad4在乳腺癌细胞中的低表达可能与TGFβ对乳腺癌的促癌作用有关联。

关键词: 转化生长因子β, Smads, MCF7, 聚合酶链反应

Abstract: Abstract:Objective To explore the molecular mechanism of TGFβ in the progress of breast cancer by examining the expressions of TGFβ1,TGFβ receptor Ⅱ and Smad transcriptional factors in normal human breast epithelium cells and MCF7 cells. Methods RT-PCR was used to measure the expression levels of TGFβ1,TGFβ receptor Ⅱ,Smad4,Smad6 and Smad7 in normal human breast epithelium cells and MCF7 cells. Results There were no any significant differences of the ratios of TGFβ1,TGFβ receptor Ⅱ,Smad6,Smad7 to GAPDH between normal human breast epithelium cells (0.721±0.214,1.001±0.312,0.689±0.12,0.221±0.124)and MCF7 cells (0.698±0.324,0.998±0.217,0.718±0.257,0.246±0.138)while the expression of Smad4 in MCF7 cells was significantly lower than that in normal human breast epithelium cells (P<0.05). Conclusion The low expression of Smad4 in MCF7 cells may be associated with the promotion effect of TGFβ on breast cancer.

Key words: transforming growth factor beta, Smads, MCF7, polymerase chain reaction