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Association of eotaxin-2 gene polymorphisms with plasma eotaxin-2 concentration
Ji-Won Min1, June-Hyuk Lee1, Choon-Sik Park2
1Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 1174, Jung Dong, Wonmi Ku, Bucheon, Gyeonggi Do, 420-021, Korea.
Journal of Human Genetics
|March 4, 2005
Summary
Genetic variations in the eotaxin-2 gene (CCL24) are linked to higher plasma eotaxin-2 levels in asthma patients. Specific single nucleotide polymorphism (SNP) and haplotypes influence eotaxin-2 production, potentially increasing asthma susceptibility.
Area of Science:
- Immunology
- Genetics
- Respiratory Medicine
Background:
- Chemokine (C-C motif) ligand 24 (CCL24, eotaxin-2) is crucial for asthma pathogenesis by recruiting inflammatory cells.
- Previous research indicated a protective association between a specific CCL24 single nucleotide polymorphism (SNP), CCL24+1272A--> G, and reduced asthma risk.
Purpose of the Study:
- To investigate the association between the CCL24+1272A--> G SNP and plasma eotaxin-2 concentrations in asthmatic individuals and healthy controls.
- To evaluate the impact of genetic variations on eotaxin-2 levels in the context of asthma.
Main Methods:
- Genotyping of the CCL24+1272A--> G SNP and relevant haplotypes (ht2, ht6) in 172 asthmatics and 135 controls.
- Quantification of plasma eotaxin-2 levels using appropriate assays.
- Statistical analysis to determine associations between genetic variants and eotaxin-2 concentrations.
Main Results:
- Asthmatic patients exhibited significantly higher plasma eotaxin-2 levels compared to normal controls (P=0.02).
- The CCL24+1272A--> G SNP, along with haplotypes ht2 and ht6, showed a strong association with elevated plasma eotaxin-2 levels in asthmatics (P=0.006, P=0.006, and P=0.002, respectively).
- A significant gene-dose effect was observed for the CCL24+1272A--> G allele and haplotypes ht2 and ht6 on plasma eotaxin-2 levels in asthmatics (P=0.005-0.032).
Conclusions:
- Genetic factors, specifically the CCL24+1272A--> G polymorphism and haplotypes ht2 and ht6, may contribute to increased eotaxin-2 production in asthma patients.
- These genetic variations could play a role in the susceptibility to asthma by influencing eotaxin-2 levels.