Association study of IRAK-M and SIGIRR genes with SLE in a large European-descent population.
OBJECTIVE
The aim of this study was to evaluate the relevance of genetic variants of interleukin receptor-associated kinase-M (IRAK-M) (rs11465955, rs1624395, rs1152888 and rs1370128) and single immunoglobulin IL1-1R-related molecule (SIGIRR) (rs3210908) genes in systemic lupus erythematosus (SLE) in four independent European-descent populations.


METHODS
Our study population consisted of a total of 2033 SLE patients and 2357 healthy controls from Spain, Germany, Italy and Argentina. The genotyping was performed using a polymerase chain reaction (PCR) system with pre-developed TaqMan allelic discrimination assay. Genetic association between the genotyped markers was determined by PLINK v1.07.


RESULTS
After a meta-analysis including these four populations, a trend of association between rs11465955 (P(meta) (-analysis)  = 0.06), rs1370128 (P(meta) (-analysis)  = 0.07) and rs1624395 (P(meta) (-analysis)  = 0.06) polymorphisms was found. However, these differences did not reach statistical significance. In addition, we did not find any association between SLE and the rs1152888 IRAK-M (P(meta) (-analysis)  = 0.13) and the rs3210908 SIGIRR (P(meta) (-analysis)  = 0.40) polymorphisms after the meta-analysis. No evidence of association with IRAK-M haplotypes was found.


CONCLUSIONS
These results suggest that the tested variations of IRAK-M and SIGIRR genes do not confer a relevant role in the susceptibility to SLE in European-descent populations.
Instituto de Parasitología y Biomedicina López-Neyra, Consejo Superior de Investigaciones Científicas, Spain.
E
E
Sánchez
M
M
García-Bermúdez
J
J
Jiménez-Alonso
E
E
de Ramón
J
J
Sánchez-Román
N
N
Ortego-Centeno
T
T
Witte
S
S
D'Alfonso
B
B
Pons-Estel
H-J
HJ
Anders
M E
ME
Alarcón-Riquelme
J
J
Martín
D016022:Case-Control Studies; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation; D006801:Humans; D053592:Interleukin-1 Receptor-Associated Kinases / Q000235:genetics*; D008180:Lupus Erythematosus, Systemic / Q000235:genetics*; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide; D017472:Receptors, Interleukin-1 / Q000235:genetics*; D044465:White People
D017472:Receptors, Interleukin-1; C546891:SIGIRR protein, human; C507771:IRAK3 protein, human; D053592:Interleukin-1 Receptor-Associated Kinases