Objective To investigate the changes of Helicobacter pylori (CagA and VacA) and pepsinogen (PGI and PGII) in gastric cancer, peptic ulcer, chronic atrophic gastritis, chronic atrophic gastritis and chronic non-atrophic gastritis, and explore their role in the differential diagnosis of gastric cancer. Methods A total of 102 patients with upper digestive tract diseases admitted to the Affiliated Cancer Hospital of Guizhou Medical University from December 2014 to December 2015 were selected as samples, including 22 patients with gastric cancer, 38 patients with digestive tract ulcers (20 patients with gastric ulcer, 18 patients with duodenal ulcer), and 21 patients with chronic atrophic gastritis. Twenty-one patients with chronic non-atrophic gastritis. All the diseases were confirmed by endoscopic and pathological diagnosis. The positive reaction and positive rate of CagA and VacA in plasma, as well as the levels of PGI and PGII were determined, and the PGR value (PGI/PGII) was calculated. To observe the positive rate of HPI and the changes of PGI, PGII and PGR in gastritis, peptic ulcer, chronic atrophic gastritis and chronic non-atrophic gastritis. Results 102 patients received endoscopic and pathological diagnosis results showed that: The incidence rates of HP infection in chronic non-atrophic gastritis, chronic atrophic gastritis, gastric ulcer, duodenal ulcer and gastric cancer were 38.10%, 61.90%, 75.00%, 66.67% and 86.36%, respectively. The positive amount of HP detected in the 4 groups was higher than that in the control group, P<0.05, and the difference was statistically significant. The positive rate of H. pylori in gastric cancer group was higher than that in other groups (P<0.05), and the difference was statistically significant. Conclusion HPI has high pathogenicity, and there are obvious differences among the strains of H. pylori in the upper digestive tract. There is a significant negative correlation between PGI and PGR and the proportion of HPI infection. Therefore, the detection of Helicobacter pylori strains combined with pepsinogen plays an important role in the screening of early gastric cancer.
helicobacter pyloriHp strain infectionupper digestive tract diseasesdiagnosis of gastric cancer
李梅、王燕、Zhou Li
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贵航贵阳医院,贵州 贵阳 550002
贵州医科大学附属肿瘤医院,贵州 贵阳 550002
Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China