title: [Reduction of p120(ctn) isoforms is significantly associated with lymph node metastasis of lung cancer.].
abstract: BACKGROUND
  p120(ctn) plays an important role in cell adhesion and has a significant association with tumorigenesis. To investigate the expression of p120(ctn) (p120 cateinin) isoforms in lung squamous cell carcinomas and adenocarcinomas, and analyze the correlation between p120(ctn) and clinicopathological parameters.
  
  
  METHODS
  The expression patterns of p120(ctn) in lung cancer tissues and the corresponding normal lung tissues were examined by reverse transcription-polymerase chain reaction (RT-PCR). Immunofluorescence, RT-PCR, and Western blot were used to investigate the expression of p120(ctn) isoforms in lung cancer cell lines BE1 and LH7.
  
  
  RESULTS
  Compared with corresponding normal lung tissues, lung cancer tissues have significantly lower levels of total mRNA, isoform1 and 3 mRNA (P <0.001, P <0.001, P =0.001). Furthermore, reduction of p120(ctn) isoform 1 mRNA is negatively associated-whereas p120(ctn) isoform 3 is positively associated-with lymphatic metastasis (P =0.01, P =0.029). BE1 cells with 94% metastatic frequency has lower levels of p120(ctn) isoforms than LH7 cells with low metastatic potential.
  
  
  CONCLUSIONS
  Reductions of p120(ctn) isoform 1 and 3 mRNA is a common phenomenon in lung cancer tissues and may play a role in metastasis progression of human lung cancer.
authors.affiliation: Department of Pathology, College of Basic Medical Sciences, China Medical University, Shenyang, Liaoning 110001, China.
authors.forename: Xinjun
authors.initials: X
authors.lastname: Dong
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qianze
authors.initials: Q
authors.lastname: Dong
authors.forename: Yuan
authors.initials: Y
authors.lastname: Miao
authors.forename: Junyi
authors.initials: J
authors.lastname: Zhang
authors.forename: Di
authors.initials: D
authors.lastname: Zhang
authors.forename: Enhua
authors.initials: E
authors.lastname: Wang