title: Effect of C111T polymorphism in exon 9 of the catalase gene on blood catalase activity in different types of diabetes mellitus.
abstract: Hydrogen peroxide plays a major role in the pathomechanism of diabetes mellitus and its main regulator is enzyme catalase. The blood catalase and the C111T polymorphism in exon 9 was examined in type 1, type 2 and gestational diabetes mellitus. Compared to the control group (104.7 +/- 18.5 MU/l) significantly decreased (p < 0.001) blood catalase activities were detected in type 2 (71.2 +/- 14.6 MU/l), gestational (68.5 +/- 12.2 MU/l) diabetes mellitus and without change in type 1 (102.5 +/- 26.9 MU/l). The blood catalase decreased (p = 0.043) with age for type 2 diabetics and did not change (p>0.063) for type 1, gestational diabetic patients and controls. Blood catalase showed a weak association with hemoglobin A1c for type 1 diabetic patients (r = 0.181, increasing). The mutant T allele was increased in type 1 and gestational diabetes mellitus, and CT+TT genotypes showed decreased blood catalase activity for type 1 and increased activities for type 2 diabetic patients. The C111T polymorphism may implicate a very weak effect on blood catalase activity in different types of diabetes mellitus.
authors.affiliation: Department of Clinical Analytical Chemistry, Medical and Health Science Center, University of Debrecen, Debrecen, Hungary.
authors.forename: I
authors.initials: I
authors.lastname: Tarnai
authors.forename: M
authors.initials: M
authors.lastname: Csordás
authors.forename: E
authors.initials: E
authors.lastname: Sükei
authors.forename: A H
authors.initials: AH
authors.lastname: Shemirani
authors.forename: M
authors.initials: M
authors.lastname: Káplár
authors.forename: L
authors.initials: L
authors.lastname: Góth
mesh_terms: D000328:Adult; D002374:Catalase / Q000097:blood* / Q000235:genetics*; D003596:Cytosine; D003922:Diabetes Mellitus, Type 1 / Q000097:blood / Q000201:enzymology / Q000235:genetics*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000201:enzymology / Q000235:genetics*; D016640:Diabetes, Gestational / Q000097:blood / Q000201:enzymology* / Q000235:genetics; D005091:Exons; D005260:Female; D006442:Glycated Hemoglobin / Q000378:metabolism; D006801:Humans; D008297:Male; D020641:Polymorphism, Single Nucleotide; D011247:Pregnancy; D012016:Reference Values; D013941:Thymine
chemical_list: D002374:Catalase; D003596:Cytosine; D006442:Glycated Hemoglobin; D013941:Thymine