Clinical characteristics and frequency of TLR4 polymorphisms in Brazilian patients with ankylosing spondylitis.
Rev Bras Reumatol Engl Ed
; 56(5): 432-440, 2016.
Article
em En, Pt
| MEDLINE
| ID: mdl-27692393
ABSTRACT
OBJECTIVES:
Innate immunity is involved in the physiopathology of ankylosing spondylitis (AS), with the participation of Gram-negative bacteria, modulation of human leukocyte antigen (HLA) B27 and the involvement of pattern recognition receptors, such as Toll-like receptors (TLRs). The aim of this study was to investigate the clinical characteristics and frequency of TLR4 polymorphisms (Asp299Gly and Thr 399Ile) in a cohort of Brazilian patients with AS.METHODS:
A cross-sectional study was carried out involving 200 patients with a diagnosis of AS and a healthy control group of 200 individuals. Disease activity, severity and functional capacity were measured. The study of TLR4 polymorphisms was performed using the restriction fragment length polymorphism method. HLA-B27 was analyzed by conventional polymerase chain reaction. The IBM SPSS Statistics 20 program was used for the statistical analysis, with p-values less than 0.05 considered significant.RESULTS:
Mean age and disease duration were 43.1±12.7 and 16.6±9.2 years, respectively. The sample was predominantly male (71%) and non-Caucasian (52%). A total of 66% of the group of patients were positive for HLA-B27. The sample of patients was characterized by moderate functional impairment and a high degree of disease activity. No significant association was found between the two TLR4 polymorphisms and susceptibility to AS.CONCLUSIONS:
TLR4 polymorphisms 399 and 299 were not more frequent in patients with AS in comparison to the health controls and none of the clinical variables were associated with these polymorphisms.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espondilite Anquilosante
/
Polimorfismo de Fragmento de Restrição
/
Antígeno HLA-B27
/
Receptor 4 Toll-Like
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adult
/
Female
/
Humans
/
Male
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
/
Pt
Ano de publicação:
2016
Tipo de documento:
Article