Abnormal Lymphocyte Subsets in Children with Type 1 Diabetes Mellitus

Abstract

This study was designed to investigate the cellular changes of peripheral blood lymphocytes (PBL) in children with type 1 diabetes mellitus (T1DM) by determining the surface antigens (CD markers). Sixty T1DM patients who were newly diagnosed as type1diabetetics (duration of their illness is less than five months) were selected from the National Diabetes Center at Al-Mustansiriya University during the period May 2004 to October 2005. All the patients were treated with daily replacement doses of insulin. Their age ranged from (3-17) years. Fifty apparently healthy control subjects, matched with age (4-17) years and sex underwent the PBL phenotyping. Phenotyping of lymphocyte surface antigens was done by direct Immunoflurocent (IF) technique using mouse antihuman CD3, CD4, CD8, CD19 and CD56.T1DM patients showed a remarkable lowering in CD3+, CD8+, and CD56+ cells but the decrease in CD4+ cells percentage was not significant in patients in comparison to healthy controls. In contrast, a significant elevation of CD19+ cell percentage and CD4+: CD8+ ratio were observed in the patients.