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Antioxidant systems in polymorphonuclear leucocytes of Type 2 diabetes mellitus. 1999

J Muchová, and A Liptáková, and Z Országhová, and I Garaiová, and P Tison, and J Cársky, and Z Duracková
Department of Medical Chemistry, Biochemistry and Clinical Biochemistry, Faculty of Medicine, Comenius University, Bratislava, Slovakia.

OBJECTIVE To examine the effect of Type 2 diabetes mellitus (DM) on enzymes of importance for oxygen-dependent killing of microorganisms by leucocytes. METHODS Twenty patients with Type 2 DM and 20 nondiabetic controls provided blood samples for analysis. RESULTS The superoxide dismutase (SOD) activity was lower by 41% in polymorphonuclear leucocytes (PMNL) from patients with Type 2 DM than in controls (3.42+/-0.32 U/mg of protein vs. 5.79+/-0.71 U/mg of protein, P<0.005). Glutathione peroxidase (GSHPx) and glutathione reductase (GR) activities of Type 2 DM patients were 73.04% and 81.12% of control values (0.84+/-0.07 nkat/mg of protein vs. 1.15+/-0.10 nkat/mg of protein, P<0.003, and 2.02+/-0.12 nkat/mg of protein vs. 2.49+/-0.16 nkat/mg of protein, P < 0.023, respectively). The catalase activity showed no significant difference. A significant increase (141.37% of control) in the concentration of thiobarbituric acid reactive products was observed (9.91+/-0.78 miromol/l vs. 7.01+/-0.47 micromol/l, P<0.003). A positive correlation between thiobarbituric acid reactive products and glucose, glycated haemoglobin and fructosamine in the serum of diabetic patients was observed. CONCLUSIONS These findings may explain some of the mechanisms underlying the increased susceptibility to certain infection in patients with Type 2 DM.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009504 Neutrophils Granular leukocytes having a nucleus with three to five lobes connected by slender threads of chromatin, and cytoplasm containing fine inconspicuous granules and stainable by neutral dyes. LE Cells,Leukocytes, Polymorphonuclear,Polymorphonuclear Leukocytes,Polymorphonuclear Neutrophils,Neutrophil Band Cells,Band Cell, Neutrophil,Cell, LE,LE Cell,Leukocyte, Polymorphonuclear,Neutrophil,Neutrophil Band Cell,Neutrophil, Polymorphonuclear,Polymorphonuclear Leukocyte,Polymorphonuclear Neutrophil
D002374 Catalase An oxidoreductase that catalyzes the conversion of HYDROGEN PEROXIDE to water and oxygen. It is present in many animal cells. A deficiency of this enzyme results in ACATALASIA. Catalase A,Catalase T,Manganese Catalase,Mn Catalase
D003924 Diabetes Mellitus, Type 2 A subclass of DIABETES MELLITUS that is not INSULIN-responsive or dependent (NIDDM). It is characterized initially by INSULIN RESISTANCE and HYPERINSULINEMIA; and eventually by GLUCOSE INTOLERANCE; HYPERGLYCEMIA; and overt diabetes. Type II diabetes mellitus is no longer considered a disease exclusively found in adults. Patients seldom develop KETOSIS but often exhibit OBESITY. Diabetes Mellitus, Adult-Onset,Diabetes Mellitus, Ketosis-Resistant,Diabetes Mellitus, Maturity-Onset,Diabetes Mellitus, Non-Insulin-Dependent,Diabetes Mellitus, Slow-Onset,Diabetes Mellitus, Stable,MODY,Maturity-Onset Diabetes Mellitus,NIDDM,Diabetes Mellitus, Non Insulin Dependent,Diabetes Mellitus, Noninsulin Dependent,Diabetes Mellitus, Noninsulin-Dependent,Diabetes Mellitus, Type II,Maturity-Onset Diabetes,Noninsulin-Dependent Diabetes Mellitus,Type 2 Diabetes,Type 2 Diabetes Mellitus,Adult-Onset Diabetes Mellitus,Diabetes Mellitus, Adult Onset,Diabetes Mellitus, Ketosis Resistant,Diabetes Mellitus, Maturity Onset,Diabetes Mellitus, Slow Onset,Diabetes, Maturity-Onset,Diabetes, Type 2,Ketosis-Resistant Diabetes Mellitus,Maturity Onset Diabetes,Maturity Onset Diabetes Mellitus,Non-Insulin-Dependent Diabetes Mellitus,Noninsulin Dependent Diabetes Mellitus,Slow-Onset Diabetes Mellitus,Stable Diabetes Mellitus
D005260 Female Females
D005979 Glutathione Peroxidase An enzyme catalyzing the oxidation of 2 moles of GLUTATHIONE in the presence of HYDROGEN PEROXIDE to yield oxidized glutathione and water. Cytosolic Glutathione Peroxidase,Glutathione Lipoperoxidase,Selenoglutathione Peroxidase,Glutathione Peroxidase, Cytosolic,Lipoperoxidase, Glutathione,Peroxidase, Glutathione,Peroxidase, Selenoglutathione
D005980 Glutathione Reductase Catalyzes the oxidation of GLUTATHIONE to GLUTATHIONE DISULFIDE in the presence of NADP+. Deficiency in the enzyme is associated with HEMOLYTIC ANEMIA. Formerly listed as EC 1.6.4.2. Glutathione-Disulfide Reductase,Reductase, Glutathione,Reductase, Glutathione-Disulfide
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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