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Identification of candidate genes associated with fibromyalgia susceptibility in southern Spanish women: the al-Ándalus project
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Identification of candidate genes associated with fibromyalgia susceptibility in southern Spanish women: the al-Ándalus project
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Identification of candidate genes associated with fibromyalgia susceptibility in southern Spanish women: the al-Ándalus project
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Journal Article
Identification of candidate genes associated with fibromyalgia susceptibility in southern Spanish women: the al-Ándalus project
2018
Overview
Background
Candidate-gene studies on fibromyalgia susceptibility often include a small number of single nucleotide polymorphisms (SNPs), which is a limitation. Moreover, there is a paucity of evidence in Europe. Therefore, we compared genotype frequencies of candidate SNPs in a well-characterised sample of Spanish women with fibromyalgia and healthy non-fibromyalgia women.
Methods
A total of 314 women with a diagnosis of fibromyalgia (cases) and 112 non-fibromyalgia healthy (controls) women participated in this candidate-gene study. Buccal swabs were collected for DNA extraction. Using TaqMan™ OpenArray™, we analysed 61 SNPs of 33 genes related to fibromyalgia susceptibility, symptoms, or potential mechanisms.
Results
We observed that the rs841 and rs1799971 GG genotype was more frequently observed in fibromyalgia than in controls (
p
= 0.04 and
p
= 0.02, respectively). The rs2097903 AT/TT genotypes were also more often present in the fibromyalgia participants than in their control peers (
p
= 0.04). There were no differences for the remaining SNPs.
Conclusions
We identified, for the first time, associations of the rs841 (guanosine triphosphate cyclohydrolase 1 gene) and rs2097903 (catechol-
O
-methyltransferase gene) SNPs with higher risk of fibromyalgia susceptibility. We also confirmed that the rs1799971 SNP (opioid receptor μ1 gene) might confer genetic risk of fibromyalgia. We did not adjust for multiple comparisons, which would be too stringent and yield to non-significant differences in the genotype frequencies between cases and controls. Our findings may be biologically meaningful and informative, and should be further investigated in other populations. Of particular interest is to replicate the present study in a larger independent sample to confirm or refute our findings. On the other hand, by including 61 SNPs of 33 candidate-genes with a strong rationale (they were previously investigated in relation to fibromyalgia susceptibility, symptoms or potential mechanisms), the present research is the most comprehensive candidate-gene study on fibromyalgia susceptibility to date.
Publisher
BioMed Central,BMC
