Relation of Cag-A-positive Helicobacter pylori strain and some inflammatory markers in patients with ischemic heart diseases.

Recently, a potential link between infectious agents and athero-sclerosis has been suggested. H. pylori strains bearing the cytotoxin associated gene A (Cag-A) provoked a heightened inflammatory response in vivo and showed stronger relation to gastric complication of this infection. The association between Cag-A positive strain and vascular diseases producing conflicting results. So, the present study aimed to estimate the seroprevalence of H. pylori Cag-A positive strains as a risk factor among different groups of ischemic heart disease and to study its interaction with high sensitivity CRP (hs-CRP) and IL6 as inflammatory host responses. The present study was conducted on anti H. pylori IgG positive 60 ischemic heart disease (IHD) patients and 20 apparently healthy individuals as a control group. IHD patients were classified into 3 groups: (group I) with acute myocardial infarction, unstable angina pectoris patients (group II), chronic stable angina pectoris patients (group III). For all patients and control groups serum anti Cag-A IgG, IL6, hs-CRP, CK, CKMB, LDH, AST and Lipid profile were estimated. IL6 and hs-CRP levels were increased in groups I, II and III as compared with group IV (P < 0.001) with positive correlation between IL6 and hs-CRP in groups I, II and III (P < 0.05). The percentage of anti Cag-A positive cases was similar among the patient groups, but significantly higher than in the control group. Thus, infection with Cag-A positive H. pylori strain may play a role as a risk factor in development of ischemic heart diseases through provocation of high inflammatory response or through other mechanism. Therefore eradication of this infection is important as it is much less expensive than long term treatment of the other risk factors.