Zusammenfassung
Noch immer ist die Ätiologie der rheumatoiden Arthritis unbekannt. Die chronische Autoimmunerkrankung manifestiert sich in charakteristischen Gelenkdestruktionen. Untersuchungen der vergangenen Jahre belegen, dass synovialen Fibroblasten eine zentrale Rolle bei Auslösung und Voranschreiten dieser Gelenkveränderungen zukommt. Die Stimulierung der synovialen Fibroblasten über komplexe, miteinander vernetzte intrazelluläre Signalwege führt zu einer stabilen Zellaktivierung, welche auch ohne kontinuierliche Stimulierung durch Entzündungszellen und ihre Mediatoren aufrechterhalten wird. Die pathologische Anheftung an den Gelenkknorpel, die gesteigerte Sekretion matrixzerstörender Enzyme sowie die Veränderungen der Apoptose, dem programmierten Zelltod, stellen die Hauptmerkmale synovialer Fibroblasten von Patienten mit rheumatoider Arthritis dar und resultieren in der progressiven Zerstörung artikulärer Strukturen. Dieser Artikel fasst aktuelle Erkenntnisse zur Aktivierung intrazellulärer Signalwege in Fibroblasten zusammen und zeigt damit mögliche Angriffspunkte für neue Therapieansätze.
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease of still unknown etiology that results in characteristic destructive changes of the joints. Research of the past years has demonstrated that synovial fibroblasts play a central role in the initiation and perpetuation of these destructive changes. Stimulation of the synovial fibroblasts through complex and interacting intracellular signaling pathways results in a stable activation that is maintain even without continuous stimulation by inflammatory cells and their mediators. The pathological attachment to articular cartilage, increased secretion of matrix degrading enzymes and alterations in programmed cell death are main characteristics of synovial fibroblasts from patients with RA and result in the progressive destruction of articular structures. The permanent activation of a number of intracellular signaling pathways constitutes the underlying responsible mechanism for the activation of synovial fibroblasts in RA. These signaling pathways do not only show a high degree of complexity, but are also interconnected in multiple ways. This article summarizes recent findings on the activation of intracellular signaling pathways in fibroblasts and points to potential targets for novel therapeutic strategies.
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Korb, A., Peters, M., Meinecke, I. et al. Intrazelluläre Signalwege synovialer Fibroblasten bei rheumatoider Arthritis. Z. Rheumatol. 66, 311–316 (2007). https://doi.org/10.1007/s00393-007-0181-5
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DOI: https://doi.org/10.1007/s00393-007-0181-5