Evaluation by examining the infection of Helicobacter pylori between precancerous lesions and gastric cancer patients

Objective To provide the basis for early detection and treatment of precancerous lesions of gastric carcinoma, and reference for early discovery, diagnoses and treatment of gastric cancer, by examining the differences of expression of Helicobaeter pylori (Hp), both in the gastric mueosa and in blood serum, between precancerous lesions of gastric carcinoma patients and gastric cancer patients. Methods Used immunechromatographic method and protein chip system to determine the expression of Hp in blood serum and used immunohistochemistry to detect the expression of Hp in gastric mucosa. The patients had been diagnosed by pathological methods, 170 patients with precancerous lesions of gastric carcinoma, 111 patients with gastric carcinoma and 31 patients with superficial gastritis. Results The expression of Hp was detected on every stage of precancerous lesions and gastric carcinoma. Compared with the detection rates of Hp, precancerous lesions of gastric carcinoma was higher than gastric carcinoma and superficial gastritis, superficial gastritis was the lowest. The differences of the three were significant (P<0.01). The detection rate of Hp in the gastric mueosa (86.2%, 66.7%, 38.7%, respectively)was obviously higher than in blood serum (80.6%, 52.3%, 32.3%, respectively). Conclusions Hp participates in the process of the precancerous lesions and gastric carcinoma. The expression of Hp both in the gastric mueosa and in the blood serum could be one of the indexes, which might report the process and curative effect of precancerous lesions. With such advantages as simple and applicability, the detection of Hp in the blood serum could be used widely. The endoscopy and the detection of Hp in the gastric mucosa are suggested for patients with Hp positive in the blood serum. Key words: Precancerous conditions;  Stomach neoplasms;  Helicobacter pyiori