title: [Preliminary investigation on expression of Bmi-1 in non-small-cellular lung cancer.].
abstract: BACKGROUND
  B-cell-specific Moloney leukemia virus insertion site 1 (Bmi-1) gene, which plays a critical role in directional differentiation and proliferation of cells, is significant in malignant transformation of cells. The aim of this study is to investigate the levels of Bmi-1 in non-small-cell lung cancer (NSCLC), and to preliminarily analyze the correlation between Bmi-1 and the development of NSCLC tissue.
  
  
  METHODS
  The expression of Bmi-1 was detected in 25 NSCLC tissues as well as in the normal paracancerous lung tissues by immunofluorescence technique and reverse transcription-polymerase chain reaction (RT-PCR).
  
  
  RESULTS
  Immunofluorescently, the positive expression of Bmi-1 proteins was revealed in nucleus of tumor cells in 76%(19 /25) of NSCLC tissue but not in paracancerous lung tissues. RT-PCR results showed that the expression of Bmi-1 in lung cancer tissues was significantly higher than that in paracancerous lung tissues (P<0.05).
  
  
  CONCLUSIONS
  Bmi-1 is over expressed in NSCLC and may be associated with the oncogenesis and development of lung cancer.
authors: Center of Oncology, Xinqiao Hospital, The Third Military Medical University, Chongqing 400037, China.
authors: Zhonghua
authors: Z
authors: Hu
authors: Yide
authors: Y
authors: Hu
authors: Yong
authors: Y
authors: Zhu