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lüll The RNA interference pathway: a new target for autoimmunity Pruijn GJArthritis Res Ther 2006[]; 8 (4): 110Many intracellular macromolecular complexes that are involved in the production or degradation of RNAs are targeted by autoantibodies in systemic autoimmune diseases. RNA interference (RNAi) is a recently characterized gene silencing pathway by which specific mRNAs are either degraded or translationally suppressed. In a recent issue of Arthritis Research and Therapy, Andrew Jakymiw and colleagues reported that the enigmatic Su autoantigen complex contains key components of the RNAi machinery. Anti-Su autoantibodies from both human patients with rheumatic diseases and a mouse model of autoimmunity recognize the endonucleolytic Argonaute and Dicer proteins, both crucial enzymes of the RNAi pathway. These data raise the question of how the anti-Su response is triggered. So far, it is unknown whether molecular modifications may be involved, as has been proposed for other intracellular autoantigens. The implication of RNAi in anti-viral defence may suggest a role for virus infection in this process.|Animals[MESH]|Autoimmunity/*immunology[MESH]|Humans[MESH]|Proteins/immunology[MESH]|RNA Interference/*immunology[MESH] |