tailieunhanh - Báo cáo y học: "Mannan Binding Lectin (MBL) genotypes coding for high MBL serum levels are associated with rheumatoid factor negative rheumatoid arthritis in never smokers"

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: Mannan Binding Lectin (MBL) genotypes coding for high MBL serum levels are associated with rheumatoid factor negative rheumatoid arthritis in never smokers. | Saevarsdottir et al. Arthritis Research Therapy 2011 13 R65 http content 13 2 R65 RESEARCH ARTICLE Open Access Mannan Binding Lectin MBL genotypes coding for high MBL serum levels are associated with rheumatoid factor negative rheumatoid arthritis in never smokers c s S-. -J J c s s u- r -J - .4-4-1 u- 1 2 3D I h1L . -J2 1 r r 4 0 4 S-. I I-1- 4 f _ r I ir f Vr I s 14 1_I f I z t I s I I I m rr r r 3 I rr IÍrS-. -J I-1- s L . 2 Saeais Saevarsaottir Bo Ding Kristjan Steinsson Geraur Gronaal Helgi valaimarsson Lars Alfreasson Lars Klareskog1 ana Leonia Paayukov1 Abstract Introduction Previous stuaies have proviaea inconsistent results on whether variants in the MBL2 gene coaing for the complement-activating mannan-binaing lectin MBL protein associate with rheumatoia arthritis RA . We re-evaluatea this in context of the main environmental ana genetic risk factors smoking HLA-DRB1 sharea epitope SE PTPN22 620W which preaispose to rheumatoia factor RF ana or anti-citrullinatea-protein antiboay ACPA -positive RA. Methods In this population-basea EIRA stuay rheumatoia factor RF ACPA smoking SE ana PTPN22 620W status was aeterminea in inciaent RA cases ana matchea controls. MBL-high n 1330 ana MBL-low n 1257 genotypes preaicting MBL levels were constructea from four promoter ana exon-1 polymorphisms in the MBL2 gene. oaas ratios with 95 confiaence interval OR 95 CI were calculatea by logistic regression. In extenaea families n 316 previously reportea aata were re-analyzea consiaering RF ana smoking. Results MBL-high genotypes tenaea to be associatea with RF-negative OR 95 CI but not RF-positive OR 95 CI RA. Results aiviaea by ACPA status aia not aiffer. When stratifiea for smoking MBL-high genotype was strongly associatea with RF-negative RA in never smokers OR 95 CI but not in ever smokers OR 95 CI . In never smokers the association was observea in both the RF-negative ACPA-negative OR

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