[Biological therapy for the treatment of rheumatic diseases].

The analysis of cytokines (i.e. interleukins, interferons and colony-stimulating factors) has only flourished in the last 25 years subsequently revealing new insights into the pathogenesis of rheumatic diseases that revolutionised the management of patients with chronic rheumatic disorders. Tumour necrosis factor-alpha (TNF-alpha), interleukin-1 (IL-1) and interleukin-6 (IL-6) have been found to play a pivotal role in rheumatic inflammation. As early as in 1992 the first proof of concept study with a monoclonal antibody against TNF was able to demonstrate positive effects in rheumatoid arthritis. Since the approval of the first anti-TNF-alpha therapy, further agents against TNF and other proinflammatory cytokines were approved and even more biological drugs are under development aimed at modulating the disturbed immune system in patients with rheumatic diseases. To date the following biologics are approved for therapy of chronic rheumatic diseases: the TNF antagonists Etanercept, Infliximab and Adalimumab; Anakinra as an IL-1 receptor antagonist; the anti-CD20 monoclonal antibody Rituximab and the anti-CD80/86 fusion protein Abatacept. In the present article, we report on biological therapy modalities in rheumatic diseases as well as the recommendations for initiation of these agents.