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Correlation between the cystathionine-r-lyase (CES) and the severity of peptic ulcer disease Xiong, Chen; Ying-Chun, Wan; Tao, Guo; Can-Xia, Xu & Fen, Wang Abstract Background:The infection of Helicobacter pylori (H. pylori) is one of the most important causes of gastric ulcer disease. The role of hydrogen sulfide (H2S) production in H. pylori-induced gastric ulcer disease. Aim:The expression of cystathionine-γ-lyase (CSE) was determined, and correlated with the severity of gastric ulcer disease. Methods: One hundred and eight patients were selected based on the determination of gastric ulcer and the infection of Helicobacter pylori (H. pylori), including 36 normal control, 36 patients with H. Pylori-negative gastric ulcer, and 36 patients with H. Pylori-positive gastric ulcer. RT-PCR determination was performed to determine the expression of CSE, NF-κB and IL-8. Results:The expression of CSE, NF-κB and IL-8 was higher in the gastric ulcer group than control group (p<0.05). Compared with the H.pylori-negative gastric ulcer, the expression of CSE, NF-κB and IL-8 was higher than H.pylori-positive gastric ulcer group (p<0.05). For H.pylori-negative gastric ulcer group, the expression of CSE positively correlated with the expression of NF-κB (r=0.98, p<0.05) and IL-8 (r=0.95, p<0.05). For H.pylori-positive gastric ulcer group, the expression of CSE also positively correlated with the expression of NF-κB (r=0.99, p<0.05) and IL-8 (r=0.85, p<0.05). Conclusion: The expression of CSE was positively correlated with the severity of gastric ulcer. Keywords Helicobacter pylori; gastric ulcer; hydrogen sulfide (H2S); cystathionine-γ-lyase (CSE)

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