DNA polymerase ? gene mutation in gastric carcinoma and the relationship with H.pylori infection / 中国癌症杂志

ABSTRACT

Purpose:To detect DNA polymerase ? gene (pol?) mutations in human gastric cancer specimens and the relationship between H.pylori infection and pol? mutation. Methods:Extracting total RNA from gastric carcinoma,corresponding cancer specimens tissues and normal tissues, synthesizing cDNA and then using them as templates proceed PCR,The products of PCR were checked by SSCP. Extracting DNA from the specimen, we could detect the H.Pylori from the tissue of gastric carcinoma and the tissue adjacent to them by PCR.Results:There were 7 abnormal SSCP of 32 gastric carcinoma samples, and the mutation rate was 21.9%, but nothing abnormal was found in the tissues adjacent to the tumor. The results of H.Pylori DNA were positive in 15 samples from 32 gastric carcinoma tissues. Positive rate was 46.9(15/32).Detection result of tissues adjacent to tumor was consistent with gastric carcinoma. Comparing pol? SSCP to H.pylori-DNA in gastric carcinoma,we found the positive samples of pol? SSCP correlated with H.pylori-DNA.Conclusions:It is suggested that the pol?gene mutation may be associated with carcinogenesis and development of human gastric cancer. H.pylori infection is possibly related to pol? mutation in gastric carcinoma.