RESUMO
Objective To investigate the role of miR-125b-1 gene in oncogenesis and progression of human lung cancer. Methods PCR-SSCP was used to detect miR-125b-1 gene mutation in 121 specimens from primary site of lung cancer tissues and 22 samples of nor- real adjacent lung tissues. Results There were 40 cases of miR-125b-1 gene mutation, and gene mutation was positively correlated to the status of lymph node metastasis ( r,=0.285, P＜0.01 ) and clinical stage metastasis( r, =0. 241, P ＜0. 01 ), but no relationship between miR-125b-1 mutation and other clinical features was found. The postoperative survival time in patients with miR-125b-1 gene mutation was significantly longer than those with low expression ( P＜0.05). Conclusion There exist miR-125b-1 gene mutation in lung cancer, miR- 125b-1 gene mutation probably plays a crucial role in lung carcinogenesis.
