Proteomic screening of the proteins associated with early lung squamous carcinoma / 肿瘤

ABSTRACT

Objective:To screen the early biomarkers associated with lung carcinoma by using proteomic method. Methods:The proteins of early lung squamous cell carcinoma tissues and adjacent normal tissues were separated by two-dimensional gel electrophoresis (2-DE) and differentially expressed proteins were screened by mass spectrometry (MS). The differential expressions of part proteins were verified by immunohistochemical method. Results:The proteomic profiles of lung squamous cell carcinoma and the adjacent normal tissues were established and the average matched protein spots in the two group were 626 and 602, respectively. Ten protein spots with higher expression in lung squamous cell carcinoma tissues were identified as Annexin 1(Anx-A1),heat shock proteins (HSP27), etc. The proteins were mainly related with cell cycle and signal transduction. The results of immunohistochemistry showed that the positive expression rates of Anx-A1 and HSP27 in lung squamous cell carcinoma tissues were significantly increased (P<0.05). Conclusion:Proteomic technology was an effective method for preliminary identification of the proteins associated with early lung carcinoma. The identified proteins laid a solid foundation for further screening the molecular markers for early diagnosis and treatment of lung cancer.