Microarray analysis of gastric epithelium tissue from Helicobacter pylori infected patients

Microarray gene expression profiling of gastric epithelium tissue obtained from Helicobacter pylori infected patients. Gastric biopsy samples from H. pylori-positive patients (n=24) were compared with  these of uninfected subjects (n=8). The patients clinical diagnoses included gastritis, peptic ulcer and gastric cancer. Patients who had received H. pylorieradication therapy or treatment with antibiotics within 4 weeks prior to the study were also excluded.