摘要
Objective To determine the role of Helicobacter pylori ( Hp ) in the development of gastric cancer and gastric precancerous lesions. Methods From the biopsy specintestinal metaplasiaens of gastric cancer and precancerous lesions lip organisms were detected by a combination use of three methods ( Clo-test,Giemsa and PCR ). Mutations of C-Ha-ras and p53 genes were determined by polymerase chain reaction-single strand conformation polymorphism analysis-direct sequencing ( PCR-SSCP-S ) . Results The detection rates of lip in gastric cancer, dysplasia and intestinal metaplasia were significantly higher than that of normal gastric mucosa , and the mutational rates of C-Ha-ras and p53 genes in Hp positive patients were significantly higher than those in lip negative patients. In gastric cancer patients, the mutational rate of p53 gene in lip positive patients was significantly higher than that of lip negative patients, in which spot mutation was the main pattern of gene changes.Conclusion Hp infection might be related to gastrocarcinogenesis and gene mutation might play a role in Hp related gastric cancer.
