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Updated: Jul 16, 2026
05:53
Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
PPARG locus haplotype variation and exacerbations in asthma.
C N A Palmer1, A S F Doney, T Ismail
1Biomedical Research Centre, Ninewells Hospital, University of Dundee, Scotland, UK.
Clinical Pharmacology and Therapeutics
|March 3, 2007
Summary
Certain genetic variations in the PPARG gene are linked to an increased risk of asthma exacerbations in young people. This finding suggests a role for genetic factors in managing childhood asthma.
Area of Science:
- Genetics
- Immunology
- Pediatrics
Background:
- The peroxisome proliferator-activated receptor gamma (PPARgamma) is recognized for its role in regulating inflammation.
- PPARgamma's involvement in inflammatory processes suggests a potential connection to asthma pathogenesis.
Purpose of the Study:
- To investigate the association between specific single-nucleotide polymorphisms (SNPs) in the PPARG gene and asthma exacerbations in a pediatric and young adult population.
- To explore the impact of these genetic variations on asthma-related clinical outcomes such as school absences and hospital admissions.
Main Methods:
- Genotyping of mouthwash-derived DNA from 569 patients aged 3-22 years for known PPARG SNPs (Pro12Ala, C1431T, C-681G).
- Clinical interviews and measurements were used to assess asthma exacerbations and related outcomes.
- Statistical analysis, including odds ratio calculations, was performed to determine the association between genotypes and asthma exacerbations.
Main Results:
- A common homozygous haplotype combination of the Pro12 and C1431 alleles (ProC genotype) was significantly associated with an increased risk of asthma exacerbations (OR 1.87, P=0.002).
- The ProC genotype also correlated with higher rates of school absences (OR 1.82, P=0.004) and hospital admissions (OR 2.32, P=0.015) within a 6-month period.
- This genotype accounted for a substantial 33% of the population-attributable risk for asthma exacerbations.
Conclusions:
- Common genetic variations within the PPARG gene locus appear to significantly influence the long-term management and control of asthma in children and young adults.
- These findings highlight the potential of PPARG genetic variants as biomarkers for predicting asthma exacerbation risk and guiding therapeutic strategies.
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