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Association between catechol-O-methyl transferase gene polymorphisms and fibromyalgia in a Korean population: A
1Department of Rheumatology, Chonnam National University Medical School and Hospital, Gwangju, Korea.
European Journal of Pain (London, England)
|February 6, 2016
Summary
Genetic variations in the catechol-O-methyl transferase (COMT) gene, specifically the rs4818 polymorphism, are linked to fibromyalgia risk in Korean patients. This suggests ethnic variations in COMT gene polymorphisms influence fibromyalgia susceptibility and pain sensitivity.
Area of Science:
- Genetics
- Pain Research
- Medical Science
Background:
- Polymorphisms in the catechol-O-methyl transferase (COMT) gene are linked to pain sensitivity.
- Previous studies on the association between COMT gene polymorphisms and fibromyalgia (FM) have yielded equivocal results.
- This study investigates the association between COMT single-nucleotide polymorphisms (SNPs) and FM risk and symptom severity.
Purpose of the Study:
- To assess the association between specific COMT gene polymorphisms (SNPs) and the risk of developing fibromyalgia.
- To evaluate the relationship between COMT gene variations and fibromyalgia symptom severity.
- To explore potential ethnic variations in the association between COMT gene polymorphisms and fibromyalgia.
Main Methods:
- Genotyping of five COMT gene SNPs (rs6269, rs4633, rs4818, rs4680, rs165599) in 409 FM patients and 423 controls using peripheral blood DNA.
- Statistical analysis to determine the association between alleles, genotypes, and haplotypes of COMT SNPs and FM risk.
- Analysis of the association between COMT SNPs and clinical measures, including the number of tender points.
Main Results:
- The rs4818 COMT gene polymorphism (specifically the GG genotype) was significantly associated with increased susceptibility to FM.
- The rs4633 CT genotype showed a non-significant association with FM presence after age and sex adjustment.
- Haplotype analysis revealed a significant association between the ACG haplotype and FM susceptibility and the number of tender points.
Conclusions:
- COMT gene polymorphisms, particularly rs4818, are associated with fibromyalgia risk and pain sensitivity in Korean patients.
- The findings suggest ethnic variations in COMT gene polymorphisms contribute to fibromyalgia susceptibility.
- These results differ from previous studies in Caucasian and Latin-American populations, highlighting the importance of ethnicity in genetic associations with FM.
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