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Abstract: OBJECTIVE: Different lines of evidence have highlighted the role of IL-17A in the inflammatory process occurring in giant cell arteritis (GCA). The aim of the present study was to assess whether the IL17A locus influences GCA susceptibility and its clinical subphenotypes.
METHODS: We carried out a large meta-analysis including a total of 1266 biopsy-proven GCA patients and 3779 healthy controls from four European populations (Spain, Italy, Germany and Norway). Five IL17A polymorphisms (rs4711998, rs8193036, rs3819024, rs2275913 and rs7747909) were selected by tagging and genotyped using TaqMan assays. Allelic combination and dependency tests were also performed.
RESULTS: In the pooled analysis, two of the five analysed polymorphisms showed evidence of association with GCA (rs2275913: PMH=1.85E-03, OR=1.17 (1.06-1.29); rs7747909: PMH=8.49E-03, OR=1.15 (1.04-1.27)). A clear trend of association was also found for the rs4711998 variant (PMH=0.059, OR=1.11 (1.00-1.23)). An independent effect of rs2275913 and rs4711998 was evident by conditional regression analysis. In addition, the haplotype harbouring the risk alleles better explained the observed association than the polymorphisms independently (likelihood p value <10(-05)).
CONCLUSIONS: Polymorphisms within the IL17A locus show a novel association with GCA. This finding supports the relevant role of the Th17 cells in this vasculitis pathophysiology.
Fuente: Ann Rheum Dis. 2014 Sep;73(9):1742-5
Editorial: BMJ Publishing Group
Año de publicación: 2014
Nº de páginas: 5
Tipo de publicación: Artículo de Revista
HERNÁNDEZ RODRÍGUEZ, JOSÉ
CID, MARIA C.
SOLANS LAQUÉ, ROSER
FERNÁNDEZ CONTRERAS, M. E.
MORADO, I. C.
GÓMEZ VAQUERO, C.
VICTOR MANUEL MARTINEZ TABOADA
ORTEGO CENTENO, NORBERTO
GARCÍA VILLANUEVA, MARÍA JESÚS
MIGUEL, EUGENIO DE
RICARDO BLANCO ALONSO
SPANISH GCA CONSORTIUM
MIGUEL ANGEL GONZALEZ-GAY MANTECON