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  • Burkill, S., et al. (författare)
  • MS and the association of the DQB1*0302 allele with pain
  • 2019
  • Ingår i: Multiple Sclerosis Journal. - : Sage Publications. - 1352-4585 .- 1477-0970. ; 25:Suppl. 2, s. 437-438
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Introduction: There is an established association between multiple sclerosis (MS) and pain treatment, in particular neuropathic pain. Murine models have confirmed an association between carriage of the DQB1*0302 allele and development of neuropathic pain-like behavior after peripheral nerve injury. Observational studies in patients with spinal disc herniation identified an association between the DQB1*0302 allele and pain, indicating a possible link in humans. This HLA allele has not been previously investigated for its influence on susceptibility to pain in MS patients.Aim: To determine whether the DQB1*0302 genotype is associated with pain in MS patients or member of the general population without MS.Methods: Three Swedish studies (EIMS, GEMS and IMSE) were combined in which enrolled MS patients were matched with 1-2 randomly selected individuals without MS by sex, age and region of residence. Register data was obtained and prescriptions for pain and neuropathic pain were identified as proxy measures for pain. Blood samples were collected and genotyped. Individuals were included if genotype data were available (MS=3877, non-MS=4548). Logistic regression had pain medication use as the outcome, to examine associations with genotype, stratified by MS status.Results: Homo- or heterozygous MS patients with the DQB1*0302 allele had no significantly increased risk of pain (adjusted OR 1.02, 95% CI 0.85-1.23) or neuropathic pain (OR 1.14, 0.97-1.34) compared with MS patients without the allele. Non-MS comparators carrying at least one allele had an increased risk of pain (OR 1.18, 1.03-1.35). Additionally, a zygosity effect appeared present particularly for women in the non-MS cohort, as homozygous individuals had a higher risk of pain compared with heterozygotes. No association was observed for MS patients.Conclusions: The DQB1*0302 allele was associated with increased risk of pain among the non-MS cohort. Zygocity also impacted on pain risk in this cohort, particularly for women. The same was not observed in MS patients, for which no increased risk was detected. In view of previous data, immune functions seem to be involved in the development of pain and the observed associa-tion is likely due to peripheral nerve injuries or peripheral neu-ropathies. The allele was not associated with pain in the MS population, which often stems from CNS lesions.
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