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[Genetic factors in predisposition to bronchial asthma]
T E Ivashchenko1, O G Sideleva, M A Petrova
1Ott Institute of Obstetrics and Gynecology, Russian Academy of Medical Sciences, St. Petersburg, 199034 Russia.
Genetika
|March 10, 2001
Summary
Null genotypes for glutathione S-transferase genes GSTM1 and GSTT1 are significantly more common in bronchial asthma patients than in healthy individuals. This suggests a genetic predisposition to asthma related to detoxification enzyme deficiencies.
Area of Science:
- Genetics
- Pharmacogenomics
- Environmental Health
Context:
- Glutathione S-transferases (GSTs) are crucial enzymes involved in detoxifying environmental pollutants and carcinogens.
- Genetic variations, specifically null genotypes, in GSTM1 and GSTT1 genes can impair detoxification pathways.
- Bronchial asthma (BA) is a complex respiratory disease influenced by genetic and environmental factors.
Purpose:
- To investigate the association between null genotypes of glutathione S-transferase M1 (GSTM1) and T1 (GSTT1) genes and bronchial asthma in a Russian population.
- To compare the frequencies of GSTM1 and GSTT1 null genotypes in patients with bronchial asthma and healthy controls.
Summary:
- The study found significantly higher frequencies of GSTM1 null (GSTM1 0/0) genotype in bronchial asthma patients (82.1%) compared to controls (37.8%).
- Similarly, the GSTT1 null (GSTT1 0/0) genotype was more prevalent in BA patients (73.7%) than in healthy individuals (16.3%).
- A notable finding was the significantly higher prevalence of compound homozygotes for both GSTM1 and GSTT1 null alleles (57.9%) among BA patients compared to controls (4.7%).
Impact:
- These findings suggest that individuals with GSTM1 and GSTT1 null genotypes may have an increased susceptibility to developing bronchial asthma due to impaired detoxification capacity.
- The results highlight the potential role of genetic polymorphisms in GST genes as risk factors for bronchial asthma.
- This research contributes to understanding the genetic basis of asthma and may inform future personalized medicine approaches.