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Role of nuclear factor kappaB in synovial inflammation.

The evaluation of molecular pathways has revealed novel insights into the pathophysiology of rheumatoid arthritis in the last several years. Gene transcription factors such as nuclear factor kB (NFkB) are activated by extracellular signals or cell-to-cell interactions that are converted into intracellular activation signals through receptor molecules located in the cell membrane. The number of known genes being translated after NFkB activation is increasing steadily. These genes includes cytokines, chemokines, growth factors, cellular ligands, and adhesion molecules. Because many of these genes are part of the pathogenesis of RA, there is considerable interest in the evaluation of the synovium-specific effects of NFkB to unveil its potential for future therapeutic strategies. The goal is to evolve these strategies from the therapies that have a wide spectrum of effects and side effects into rheumatoid arthritis-specific therapies designed to inhibit distinct molecular pathways within the synovium.