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[The correlation between lung cancer lymph node metastasis and nm23-H1 gene mutation, mRNA expression]
1Department of Medical Genetics, Sun Yat-sen University of Medical Sciences, Guangzhou.
Objective:
To examine the genomic status and the mRNA expression of the nm23-H1 gene, and to analyse the relationship between metastasis of non-small cell lung carcinomas and the gene abnormalities.
Method:
By using PCR-SSCP and semiquantitative RT-PCR, the nm23-H1 gene mutation and mRNA expression were studied in 31 cases of non-small cell lung cancer. The normal tissue adjacent to carcinoma and normal lung tissue were used as control.
Result:
None of the nm23-H1 gene mutation was found in all the lung cancer samples. Decreased expressions of this gene were found in 14 of 20 lung cancer cases with lymph node metastasis, the rate (14/20) of this was significantly higher than that (3/11) of the non-metastatic cancers (P < 0.05).
Conclusion:
These data indicate that nm23-H1 may be a putative metastasis suppressor gene which had shown reverse regulating activation in the metastatic progression of lung cancers, and the level of nm23-H1 mRNA may be considered as one of the pathological indicators in predicting metastatic potential of lung cancers.
