title: A study of oxidative stress parameters in anti-helicobacter pylorus immunoglobulin g positive and negative gastric cancer patients.
abstract: OBJECTIVE
  Helicobacter pylorus (HP) is a Gram-negative spiral-shaped microaerophilic bacterium, which colonizes in the gastric mucosa of humans. The gastric human pathogen HP causes chronic gastritis and ulcers, and has a strong relationship with gastric cancer. The aim of this study was to determine advanced oxidation protein products (AOPP) levels, activities of myeloperoxidase (MPO) and catalase (CAT) in two groups.
  
  
  METHODS
  For this aim, one group included 30 patients with gastric cancer (Group 1) and the other included 30 subjects with non-gastric cancer and Anti-HP immunoglobulin (Ig) G antibody positive (group 2). Anti-HP IgG antibody test values were found as positive in fifty percent of group 1 and all of the group 2 patients.
  
  
  RESULTS
  Significantly increased AOOP levels were found in group 1 (p < 0.05) compared to group 2. There were no significant differences between the groups in regard to activities of MPO and CAT. In addition, AOPP level, MPO and CAT activities were similar among the Anti-HP IgG positive and negative subgroups of group 1 patients.
  
  
  CONCLUSIONS
  The result of this study indicated that gastric cancer patients were characterized by increased protein oxidation, whereas there was no significant difference in oxidative stress parameters and antioxidant enzyme activity between the Anti-HP IgG positive and negative gastric cancer patients.
authors.affiliation: Department of Biochemistry, Yuzuncu Yil University, Medical Faculty, Van, Turkey. tevfiknoyan@hotmail.com
authors.forename: Tevfik
authors.initials: T
authors.lastname: Noyan
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Guducuoglu
authors.forename: Mahmut
authors.initials: M
authors.lastname: Ilhan
mesh_terms: D000328:Adult; D000368:Aged; D002374:Catalase / Q000097:blood; D005260:Female; D016481:Helicobacter Infections / Q000276:immunology* / Q000378:metabolism; D016480:Helicobacter pylori / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood*; D008297:Male; D008875:Middle Aged; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D009195:Peroxidase / Q000097:blood; D013274:Stomach Neoplasms / Q000097:blood / Q000276:immunology / Q000378:metabolism*
chemical_list: D007074:Immunoglobulin G; D002374:Catalase; D009195:Peroxidase