title: O(6)-methylguanine DNA methyltransferase activity in diabetic patients.
abstract: In the present study, we evaluated O(6)-methylguanine-DNA methyltransferase (MGMT) activity in diabetic patients. The study was performed on 27 patients with Type 1 diabetes, and 42 with Type 2 diabetes. Patients with complications were excluded from the study. 36 non-diabetic volunteers, non-smokers who do not consume alcoholic beverage, were chosen from the medical staff as control subjects. MGMT activity was measured by the transfer of radiolabeled methyl groups from a prepared methylguanine-DNA substrate to the enzyme fraction of leukocyte extract. Leukocyte MGMT activity was significantly reduced in both Type 1 and Type 2 diabetes patients as compared with control subjects (P<0.001). The present study demonstrates decreased MGMT activity in leukocytes from patients with Type 1 and Type 2 diabetes.
authors.affiliation: Department of Biochemistry Cerrahpaşa Medical School, Istanbul University, Istanbul, Turkey. tulakcay@yahoo.com
authors.forename: Tülay
authors.initials: T
authors.lastname: Akçay
authors.forename: Yildiz
authors.initials: Y
authors.lastname: Dinçer
authors.forename: Nilgün
authors.initials: N
authors.lastname: Celebi
authors.forename: Hasan
authors.initials: H
authors.lastname: Ilkova
mesh_terms: D000328:Adult; D001786:Blood Glucose / Q000378:metabolism; D002096:C-Peptide / Q000097:blood; D003922:Diabetes Mellitus, Type 1 / Q000097:blood / Q000201:enzymology*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000201:enzymology*; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis; D006801:Humans; D007962:Leukocytes / Q000201:enzymology; D008297:Male; D008875:Middle Aged; D019853:O(6)-Methylguanine-DNA Methyltransferase / Q000378:metabolism*; D018579:Patient Selection; D012016:Reference Values
chemical_list: D001786:Blood Glucose; D002096:C-Peptide; D006442:Glycated Hemoglobin; D019853:O(6)-Methylguanine-DNA Methyltransferase