Abstract
Objective: The recently observed increase in the incidence of type 1 diabetes mellitus (Type 1 DM) suggests a major role of environmental factors in the etiopathogenesis of the disease. The individual variation in cytochrome P<sub>450</sub>IID6 may influence the individual susceptibility to environmentally linked diseases. We aimed to evaluate the prevalence of cytochrome P<sub>450</sub>IID6 phenotypes in Hungarian children with Type 1 DM (n = 69) compared to healthy controls (n = 100). Methods: Debrisoquine was administered orally and debrisoquine hydroxylation phenotype was determined as a metabolic ratio of urinary recovered debrisoquine and 4-hydroxydebrisoquine. Results: Eight of the 100 healthy subjects (8%) and 15 of the 69 diabetic children (22%) (p < 0.05) had cytochrome P<sub>450</sub>IID6 poor metabolizer phenotype (metabolic ratio ≧12.6). Conclusion: Cytochrome P<sub>450</sub>IID6’s activity may play a role in the development of Type 1 DM.
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