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Neue Immundiagnostik bei Arthritiden

Novel immunodiagnostics for inflammatory arthritis

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Zusammenfassung

Die Immundiagnostik von Arthritiden spielt eine wichtige Rolle in der Differenzialdiagnose einer Arthritis, muss aber obligat im klinischen Kontext interpretiert werden. Der Nachweis von Antikörpern (Ak) gegen citrullinierte Proteine hat die Immundiagnostik von Arthritiden wesentlich bereichert, während die Wertigkeit des Rheumafaktors aufgrund der geringeren Spezifität abgenommen hat. Ak gegen carbamylierte bzw. oxidierte Proteine werden die Immundiagnostik der Arthritis, insbesondere der rheumatoiden Arthritis zukünftig erweitern. Demgegenüber spielt die Bestimmung von Zytokinkonzentrationen in Plasma oder Synovia in der Diagnostik von Arthritiden eine eher untergeordnete Rolle. Die indirekte Immunfluoreszenz stellt nach wie vor den Goldstandard in der Detektion von antinukleären Antikörpern (ANA) dar, positive Befunde sollten hinsichtlich der Antigenspezifität weiter untersucht werden. ANA sind nicht obligat mit Autoimmunerkrankungen assoziiert. Beispiele für nichtpathogene ANA sind Anti-DFS70-Ak.

Abstract

Immunodiagnostics play an important role in the differential diagnostics of arthritis but the test results must be interpreted with respect to the clinical context. The detection of antibodies against citrullinated proteins has significantly improved the immunodiagnostics of arthritis, whereas the importance of testing for rheumatoid factor has decreased due to the low specificity. Antibodies against carbamylated or oxidized proteins will expand the immunodiagnostics of arthritis (especially rheumatoid arthritis) in the future. In contrast, the determination of cytokine concentrations in plasma or synovial fluid plays a subordinate role in the differential diagnostics of arthritis. Indirect immunofluorescence continues to be the gold standard in the detection of antinuclear antibodies (ANA) and in the case of positive results further testing for antigen specificity should be carried out. The presence of ANA is not necessarily associated with autoimmune diseases. An example of a non-pathogenic ANA is anti-DFS70 antibodies.

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Correspondence to M. Wahle.

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Interessenkonflikt

M. Wahle und E. Kling geben an, dass kein Interessenkonflikt besteht.

Dieser Beitrag beinhaltet keine von den Autoren durchgeführten Studien an Menschen oder Tieren.

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M. Fleck, Bad Abbach

T. Dörner, Berlin

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Wahle, M., Kling, E. Neue Immundiagnostik bei Arthritiden. Z Rheumatol 75, 361–366 (2016). https://doi.org/10.1007/s00393-016-0090-6

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  • DOI: https://doi.org/10.1007/s00393-016-0090-6

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