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Objective: This study was designed to investigate the possible role of DcR3 and TL1A proteins in chronic Helicobacter pylori (HP) gastritis.Subjects and Methods: Thirty-six patients were included [26 patients with HP (+) and 10 patients with HP (-)] with symptoms of epigastric pain, digestive discomfort or melena. All patients underwent serum examination, as well as gastroscopy with biopsy. HP infection was diagnosed histologically. Triple HP eradication therapy took place, and the patients were reexamined by means of serum and endoscopic assessment and biopsy. Histological sections were evaluated for the degree of chronic inflammation, the inflammatory activity, the presence of intestinal metaplasia and atrophy, as well as the immunohistochemical expression of DcR3 protein in the gastric mucosa. The serum DcR3 and TL1A protein levels were assessed before and after HP eradication therapy.Results: After eradication therapy, the degree and the activity of mucosal inflammation of HP(+) pa ...
Objective: This study was designed to investigate the possible role of DcR3 and TL1A proteins in chronic Helicobacter pylori (HP) gastritis.Subjects and Methods: Thirty-six patients were included [26 patients with HP (+) and 10 patients with HP (-)] with symptoms of epigastric pain, digestive discomfort or melena. All patients underwent serum examination, as well as gastroscopy with biopsy. HP infection was diagnosed histologically. Triple HP eradication therapy took place, and the patients were reexamined by means of serum and endoscopic assessment and biopsy. Histological sections were evaluated for the degree of chronic inflammation, the inflammatory activity, the presence of intestinal metaplasia and atrophy, as well as the immunohistochemical expression of DcR3 protein in the gastric mucosa. The serum DcR3 and TL1A protein levels were assessed before and after HP eradication therapy.Results: After eradication therapy, the degree and the activity of mucosal inflammation of HP(+) patients were significantly lower (p = 0.001). No differences were observed between the two groups in regard to atrophy and intestinal metaplasia. The serum levels of the DcR3 and TL1A proteins of patients with HP (+) and HP (-) did not differ significantly (p = 0.244). By immunohistochemistry, there was increased mucosal expression of DcR3 in HP (+) patients, as compared to HP (-) controls (p = 0.008). Immunohistochemical detection of DcR3 decreased from marked to mild after eradication therapy (p = 0.019). There was a positive correlation between the immunohistochemical expression of DcR3 and the degree of inflammation, both before and after eradication therapy (p = 0.03 and p = 0.47, respectively). The immunohistochemical expression of DcR3 was not found to be correlated with inflammatory activity, atrophy or intestinal metaplasia (p> 0.05). Prior to eradication therapy, serum DcR3 levels were higher in the HP (+) patients with moderate or marked grade of mucosal immunostaining (p=0.037). Both the serum DcR3 and the immunopositivity in the biopsies decreased after eradication therapy in the majority of patients (p, NS). No statistically significant difference was identified between the immunohistochemical DcR3 detection and the serum TL1A (p=0.21) before and after eradication therapy.Conclusions: In chronic HP gastritis, there is increased expression of DcR3 in the gastric mucosa. This finding is not related to the presence of intestinal metaplasia or atrophy. Eradication of HP contributes to the reduction of inflammation and the decreased expression of DcR3 in the gastric mucosa. There was no correlation between the serum levels of DcR3 and the presence of HP, the activity of inflammation, atrophy or intestinal metaplasia. Moreover, there was no correlation between TL1A and histological parameters (inflammation, atrophy, intestinal metaplasia), the serum levels of DcR3 or the degree of DcR3 immunohistochemical expression in biopsy material. In patients with chronic gastritis, DcR3 protein could potentially be used as biomarker for inflammation. Towards this direction, a prospective study will be needed.
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