Glutathione S transferase deficiency and passive smoking increase childhood asthma

Kabesch, M.; Hoefler, C.; Carr, D.; Leupold, W.; Weilond, S. K.; von Mutius, E.
July 2004
Thorax;Jul2004, Vol. 59 Issue 7, p569
Academic Journal
Background: It has been suggested that the genetically determined deficiency of glutathione S transferase (GST) enzymes involved in the detoxification of environmental tobacco smoke (ETS) components may contribute to the development of asthma. Methods: A large population of German schoolchildren (n = 3054) was genotyped for deficiencies of the GST isoforms Ml and Ti. The association between GSTM1 and GSTT1 genotypes and asthma as well as atopy was investigated with respect to current and in utero ETS exposure. Results: In children lacking the GSTM1 allele who were exposed to current ETS the risk for current asthma (OR 5.5, 95% CI 1.6 to 18.6) and asthma symptoms such as wheeze ever (OR 2.8, 95% Cl 1.3 to 6.0), current wheezing (OR 4.7, 95% Cl 1.8 to 12.6) and shortness of breath (OR 8.9, 95% CI 2.1 to 38.4) was higher than in GSTM1 positive individuals without ETS exposure. Hints of an interaction between ETS exposure and GSTM1 deficiency were identified. In utero smoke exposure in GSTT1 deficient children was associated with significant decrements in lung function compared with GSTT1 positive children not exposed to ETS. Conclusions: GSTM1 and GS1T1 deficiency may increase the adverse health effects of in utero and current smoke exposure.


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