title: Glutathione- S-transferase micro and theta gene polymorphisms as new risk factors of atopic bronchial asthma.
abstract: The genetic polymorphism of glutathione- S-transferase M1 (GSTM1) and glutathione- S-transferase T1 (GSTT1) genes and the cytochrome P4501A1 gene responsible for xenobiotic conjugating enzymes of the phase II and phase I detoxification system were studied by PCR-RFLP in the blood spots of 109 patients with atopic bronchial asthma and 90 healthy individuals. GSTM1 gene deletion (GSTM1(0/0)) was detected in 47.8% of individuals in the control group and in 76.1% of asthmatic patients. Individuals without the GSTM1 gene were at approximately 3.5--fold higher risk of developing asthma. The proportion of GSTT1(0/0) genotypes was significantly higher in the group of asthmatics (67.0%) than in controls (23.3%). The proportion of individuals with a deficiency in both GSTM1 and GSTT1 gene activity was more than four times higher in asthmatic patients than in the control group (54.1% and 12.2%, respectively). The frequency of the Ile-Val polymorphism of the CYP1A1 gene was similar in controls and asthmatic patients. This study shows the association of atopic bronchial asthma with GSTM1(0/0), GSTT1(0/0) genotypes.
authors.affiliation: Institute of Obstetrics and Gynecology, 199034 Mendeleevskaya line 3, St. Petersburg, Russia. TIV@ti2629.spb.edu
authors.forename: T E
authors.initials: TE
authors.lastname: Ivaschenko
authors.forename: O G
authors.initials: OG
authors.lastname: Sideleva
authors.forename: V S
authors.initials: VS
authors.lastname: Baranov
mesh_terms: D000328:Adult; D001249:Asthma / Q000201:enzymology / Q000209:etiology / Q000235:genetics*; D002648:Child; D002675:Child, Preschool; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics; D020022:Genetic Predisposition to Disease; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D011110:Polymorphism, Genetic; D012307:Risk Factors
chemical_list: D019363:Cytochrome P-450 CYP1A1; D005982:Glutathione Transferase; C413545:glutathione S-transferase T1