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Ítem Drug-induced lupus in anti-TNF-alpha therapy and its treatment with rituximab(Springer Heidelberg, 2012-10-01) Vallejo, SantiagoWe report three patients with rheumatoid arthritis (RA) who were treated with anti-TNF-α agents and who developed drug-induced lupus (DIL). Two of them received etanercept and the remainder adalimumab. We also present the favorable response observed with the withdrawal of the anti-TNF-alpha agents and the introduction of rituximab. Through this intervention, we observed a very good control of the activity of both DIL and RA without additional adverse reactions.Ítem The importance of evolution in the development and course of rheumatoid arthritis(Elsevier, 2014-06-01) Cañas Dávila, Carlos AlbertoRheumatoid arthritis (RA) is a complex autoimmune disease of recent evolutionary origin. Genetic drift determines diverse polymorphisms implicated in the susceptibility to RA including the major histocompatibility complex (MHC) class II genes in the so-called shared epitope. These genes originated after the divergence between Homo and Pan from their common ancestry Ardipithecus ramidus about 5 million years ago. Natural selection determined the particular changes in the legs (bipedal position), hands, neck, brain and eusociality in humans which influence the clinical presentation of RA. In this article, we hypothesized that the origin and course of RA may be explainable in the light of evolution.