Abstract:
OBJECTIVES:Beyond their role in haemostasis, platelets can actively contribute to immunity. The activation of the platelet collagen receptor glycoprotein VI (GPVI) promotes the release of small extracellular vesicles called microparticles. These microparticles are found in the joint bathing fluid of patients with rheumatoid arthritis (RA) and are thought to amplify inflammation. The gene coding for GPVI is localised on chromosome 19q13.4 and contains different single nucleotide polymorphisms (SNPs). Five non-synonymous SNPs define the major and minor haplotypes of GPVI. The minor haplotype is associated with higher risk of cardiovascular incidents. In this study, we examined whether this minor haplotype is also associated with RA. METHODS:Allelic discrimination of the SNPs reported to define these haplotypes encoding SKTQH and PEALN protein isoforms, ie rs1613662, rs1654416, rs2304167, rs1654413 and rs1671152, was performed in 399 RA patients and their two parents, all of Western European ethnicity. Statistical analysis relied on the transmission disequilibrium test by the use of the FBAT programme. Haplotypes were also estimated by the FBAT programme. RESULTS:We observed no statistically significant transmission disequilibrium for the SNPs tested. The major haplotype TAAC, which encodes the SKTQH isoform, was identified in 78% of our cohort individuals, and the CGGA haplotype which encodes the PEALN isoform was identified in 8% of our individuals. We observed no association of these haplotypes of the GPVI gene with RA. CONCLUSIONS:This demonstrates that the SNPs tested within the GPVI gene are not associated with RA susceptibility and/or severity, suggesting that platelet GPVI may contribute to arthritis independently of its gene polymorphism.
journal_name
Clin Exp Rheumatoljournal_title
Clinical and experimental rheumatologyauthors
Michou L,Cornélis F,Baron M,Bombardieri S,Balsa A,Westhovens R,Barrera P,Alves H,Radstake TR,Migliorini P,Bardin T,Petit-Teixeira E,Boilard Esubject
Has Abstractpub_date
2013-09-01 00:00:00pages
770-2issue
5eissn
0392-856Xissn
1593-098Xpii
6776journal_volume
31pub_type
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journal_title:Clinical and experimental rheumatology
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