tailieunhanh - Báo cáo y học: " Lack of replication of genetic predictors for the rheumatoid arthritis response to anti-TNF treatments: a prospective case-only study"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Lack of replication of genetic predictors for the rheumatoid arthritis response to anti-TNF treatments: a prospective case-only study. | Suarez-Gestal et al. Arthritis Research Therapy 2010 12 R72 http content 12 2 R72 RESEARCH ARTICLE Open Access Lack of replication of genetic predictors for the rheumatoid arthritis response to anti-TNF treatments a prospective case-only study 1 f 1 f 1 1 Marian Suarez-Gestal Eva Perez-Pampin Manuel Calaza Juan J Gomez-Reino Antonio Gonzalez Abstract Introduction We aimed to replicate the strong associations that a recent genome wide association study GWAS has found between 16 single nucleotide polymorphisms SNPs and response to anti-tumour necrosis factor TNF treatment in 89 patients with rheumatoid arthritis RA . This study is very important because according to published simulations associations as strong as the reported ones will mean that these SNPs could be used as predictors of response at the individual level. Methods Disease activity score DAS28 was evaluated in 151 anti-TNF treated patients with RA of Spanish ancestry at baseline and every 3 months thereafter. Genotypes of the 16 putative predictor SNPs were obtained by single-base extension. Association between the relative change in DAS28 and SNP genotypes was tested by linear regression. In addition logistic regression was applied to compare genotypes in non-responders n 34 versus good-responders n 61 following the EULAR response criteria. Results None of the analyses showed any significant association between the 16 SNPs and response to anti-TNF treatments at 3 or 6 months. Results were also negative when only patients treated with infliximab of the total were separately analyzed. These negative results were obtained in spite of a very good statistical power to replicate the reported strong associations. Conclusions We still do not have any sound evidence of genetic variants associated with RA response to anti-TNF treatments. In addition the possibility we had envisaged of using the results of a recent GWAS for prediction in individual patients should be dismissed. .