Variation at interleukin-6 receptor gene is associated to joint damage in rheumatoid arthritis.

INTRODUCTION: Interleukin-6 (IL-6) cytokine signaling is key in Rheumatoid Arthritis (RA) pathophysiology. Blocking IL-6 receptor (IL6R) has proven to be a highly effective treatment to prevent joint damage. This study was performed to investigate the association between the genetic variation at IL6...

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Detalles Bibliográficos
Autores: Lopez-Lasanta, Maria, Julià, Antonio, Maymó, Joan, Fernández-Gutierrez, Benjamín, Ureña-Garnica, Inmaculada, Blanco, Francisco J, Cañete, Juan D, Alperi-López, Mercedes, Olivè, Alex, Corominas, Héctor, Tornero, Jesus, Erra, Alba, Almirall, Miriam, Palau, Nuria, Ortiz, Ana, Avila, Gabriela, Rodriguez-Rodriguez, Luis, Alonso, Arnald, Tortosa, Raül, Gonzalez-Alvaro, Isidoro, Marsal, Sara
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Instituto de Salud Carlos III (ISCIII)
Repositorio:Repisalud
Idioma:inglés
OAI Identifier:oai:repisalud.isciii.es:20.500.12105/17097
Acceso en línea:http://hdl.handle.net/20.500.12105/17097
Access Level:acceso abierto
Palabra clave:Artritis reumatoide
Alelos
Estudios de cohortes
Frecuencia génica
Predisposición genética a la enfermedad
Genotipo
Halotipos
Articulaciones
Modelos lineales
Desequilibrio de ligamiento
Metanálisis como asunto
Polimorfismo de nucleótido único
Receptores de interleucina-6
España
Arthritis, Rheumatoid
Cohort Studies
Gene Frequency
Genetic Predisposition to Disease
Genotype
Haplotypes
Humans
Joints
Linear Models
Linkage Disequilibrium
Meta-Analysis as Topic
Polymorphism, Single Nucleotide
Receptors, Interleukin-6
Spain
Alleles
Descripción
Sumario:INTRODUCTION: Interleukin-6 (IL-6) cytokine signaling is key in Rheumatoid Arthritis (RA) pathophysiology. Blocking IL-6 receptor (IL6R) has proven to be a highly effective treatment to prevent joint damage. This study was performed to investigate the association between the genetic variation at IL6R gene and the severity of joint damage in RA. METHODS: IL6R gene tagging SNPs (n = 5) were genotyped in a discovery group of 527 RA patients from 5 different university hospitals from Spain. For each marker, a linear regression analysis was performed using an additive model and adjusting for the years of evolution of the disease, autoantibody status, gender and age. Haplotypes combining the SNPs were also estimated and tested for association with the level of joint destruction. Using an independent cohort of 705 RA patients from 6 university hospitals we performed a validation study of the SNPs associated in the discovery phase. RESULTS: In the discovery group we found a highly significant association between IL6R SNP rs4845618 and the level of joint destruction in RA (P = 0.0058, P corrected = 0.026), and a moderate association with SNP rs4453032 (P = 0.02, P corrected = 0.05). The resulting haplotype from both SNPs was more significantly associated with joint damage (P = 0.0037, P corrected = 0.011). Using the validation cohort, we replicated the association between the two IL-6R SNPs with the degree of joint destruction in RA (P = 0.007 and P = 0.04, meta-analysis P = 0.00011 and P = 0.0021, respectively), and the haplotype association (P = 0.0058, meta-analysis P = 6.64 e-5). CONCLUSIONS: Genetic variation at IL6R gene is associated with joint damage in RA.

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