EVALUATION OF THE SERUM LEVELS OF IMMUNOGLOBULINS AND COMPLEMENT FACTORS IN B-THALASSEMIA MAJOR PATIENTS IN SOUTHERN IRAN

Background: Beta-thalassemia major is one of the major health problems in our country. Many studies have confirmed the fact that, these patients have an increased susceptibility to bacterial infections. Objective: In this study, we have assessed the humoral immune system in 68 thalassemic patients by measuring their serum concentration of Immunoglobulin G (IgG), IgM, IgA, C3 and C4 in order to find out a responsible immune defect. Methods: Sixty eight β-thalassemia major patients were enrolled randomly from referrals to Dastgheib clinic of thalassemia. The same number of case controls with matched age and sex were selected from healthy people without any history of recent or recurrent infections. Serum IgG, IgM, IgA, C3 and C4 levels were assessed using Single Radial Immunodiffusion (SRID). Results: Serum levels of IgG, IgM & IgA were significantly higher (P 2500ng/ml had higher serum IgM level. Conclusion: These results can be due to continuous exposure to antigens, repeated infections, chronic liver disease and splenectomy but not iron overload. The only probable cause of humoral immune deficiency found in these patients is a defect in serum complement levels.