The ratio between the normal (+) and null (0) alleles of the genes encoding glutatione S-transferases M1 (GSTM1) and T1 (GSTT1) were studied in normal individuals from northwestern Russia (control group) and in patients with bronchial asthma (BA). The frequency of the GSTM1 0/0 genotype in the population sample was statistically significantly lower (37.8%) than in the BA patients (82.1%; χ2 = 16.8;P< 0.001; Wχ2 = 15.7; α = 0.01). For the GSTT1 gene, similar data were obtained. The frequency of the GSTT1 0/0 genotype in healthy donors was statistically significantly higher (16.3%) than in the BA patients (73.7%; χ2 = 28.5;P < 0.001; Wχ2 = 23.22; α = 0.01). A significant preponderance of the compound homozygotes for the GSTM1 and GSTT1 null alleles among the BA patients was observed. The frequency of the GSTM1 0/0, GSTT10/0 individuals among the patients was 57.9%, while it was only 4.7% among the controls (χ2 = 27.4; P < 0.001).
Russian Journal of Genetics – Springer Journals
Published: Oct 16, 2004
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