BACKGROUND: Glutathione S-transferases (GSTs) detoxify environmental chemicals and are involved in oxidative stress pathways. Deletion polymorphisms affect enzyme activities and have been associated with risk of disease. OBJECTIVE: The objective was to clarify whether biomarkers of oxidation, antioxidation, inflammation, and nutritional factors differ by GST genotype in healthy adults. DESIGN:Subjects (n = 383) consisted of nonsmokers and nonusers ofantiinflammatory drugs and antioxidant vitamin supplements. Deletion polymorphisms of GSTM1 and GSTT1 were genotyped. F(2)-isoprostanes, malondialdehyde, C-reactive protein, serum vitamin C, carotenoids, tocopherols, and other nutritional factors were assessed. RESULTS: The concentration of serum vitamin C was higher in persons with the inactive GSTM1-0 genotype (P = 0.006). This relation was unchanged after adjustment for age, sex, BMI, or dietary vitamin C. F(2)-isoprostanes and malondialdehyde were lower in the GSTM1-0 and GSTT1-0 groups, respectively, but significance was lost after control for serum vitamin C. The dual deletion, GSTM1-0/GSTT1-0 (n = 37), was associated with higher serum iron and total and LDL-cholesterol concentrations (all P < 0.01) and lower malondialdehyde concentrations, which persisted after adjustment for age, sex, BMI, and serum vitamin C. Carotenoids and α- and γ-tocopherols were not associated with either genotype. CONCLUSIONS:Oxidative stress and inflammation biomarkers differ by GST genotype, but serum vitamin C appears to be the most consistent factor. Examination of other relevant genes may be needed to understand the concentration and function of ascorbic acid in the GST enzyme system. This trial is registered at clinicaltrials.gov as NCT00079963.
RCT Entities:
BACKGROUND: Glutathione S-transferases (GSTs) detoxify environmental chemicals and are involved in oxidative stress pathways. Deletion polymorphisms affect enzyme activities and have been associated with risk of disease. OBJECTIVE: The objective was to clarify whether biomarkers of oxidation, antioxidation, inflammation, and nutritional factors differ by GST genotype in healthy adults. DESIGN: Subjects (n = 383) consisted of nonsmokers and nonusers of antiinflammatory drugs and antioxidant vitamin supplements. Deletion polymorphisms of GSTM1 and GSTT1 were genotyped. F(2)-isoprostanes, malondialdehyde, C-reactive protein, serum vitamin C, carotenoids, tocopherols, and other nutritional factors were assessed. RESULTS: The concentration of serum vitamin C was higher in persons with the inactive GSTM1-0 genotype (P = 0.006). This relation was unchanged after adjustment for age, sex, BMI, or dietary vitamin C. F(2)-isoprostanes and malondialdehyde were lower in the GSTM1-0 and GSTT1-0 groups, respectively, but significance was lost after control for serum vitamin C. The dual deletion, GSTM1-0/GSTT1-0 (n = 37), was associated with higher serum iron and total and LDL-cholesterol concentrations (all P < 0.01) and lower malondialdehyde concentrations, which persisted after adjustment for age, sex, BMI, and serum vitamin C. Carotenoids and α- and γ-tocopherols were not associated with either genotype. CONCLUSIONS: Oxidative stress and inflammation biomarkers differ by GST genotype, but serum vitamin C appears to be the most consistent factor. Examination of other relevant genes may be needed to understand the concentration and function of ascorbic acid in the GST enzyme system. This trial is registered at clinicaltrials.gov as NCT00079963.
Authors: M D Mustafa; Rahul Pathak; Tanzeel Ahmed; Rafat S Ahmed; A K Tripathi; Kiran Guleria; B D Banerjee Journal: Clin Biochem Date: 2010-07-16 Impact factor: 3.281
Authors: Gladys Block; Christopher D Jensen; Jason D Morrow; Nina Holland; Edward P Norkus; Ginger L Milne; Mark Hudes; Tapashi B Dalvi; Patricia B Crawford; Ellen B Fung; Laurie Schumacher; Paul Harmatz Journal: Free Radic Biol Med Date: 2008-04-16 Impact factor: 7.376
Authors: J Cotignola; D B Leonardi; A Shahabi; A D Acuña; M C Stern; N Navone; C Scorticati; A De Siervi; O Mazza; E Vazquez Journal: Prostate Cancer Prostatic Dis Date: 2012-11-13 Impact factor: 5.554
Authors: Christopher J Hammond; S H Melissa Liew; Frederik J Van Kuijk; Stephen Beatty; John M Nolan; Tim D Spector; Clare E Gilbert Journal: Invest Ophthalmol Vis Sci Date: 2012-07-26 Impact factor: 4.799