Zeitschrift für Rheumatologie

, Volume 77, Issue 3, pp 256–262 | Cite as

Interferon-stimulated gene 15 expression in systemic lupus erythematosus

Diagnostic value and association with lymphocytopenia
Originalie
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Abstract

Background

The aim of this study was to (a) assess the relationship between interferon-stimulated gene 15 (ISG15) expression and clinical manifestations of systemic lupus erythematosus (SLE) and (b) investigate the diagnostic value of ISG15 in SLE.

Patients and methods

The study comprised 28 patients newly diagnosed with SLE, 10 patients with undifferentiated connective tissue disease, and 22 healthy volunteers. Of the SLE patients, 14 were chosen randomly to be followed up for 4 weeks. ISG15 expression in whole blood cells was determined by quantitative polymerase chain reaction. Clinical and laboratory parameters were recorded at baseline and after treatment.

Results

The ISG15 mRNA level was higher in whole blood cell counts of SLE patients when compared with the disease control and healthy control groups. Moreover, it was correlated with SLE disease activity as assessed via the SLE disease activity index, serositis, and anemia at baseline. ISG15 expression correlated with lymphocytopenia in active SLE patients before treatment. On receiver operating characteristic curve analysis, the area under the curve for ISG15 expression was 0.826 (p = 0.000015).

Conclusion

ISG15 expression is relatively high in SLE patients and correlates with disease activity before treatment. ISG15 expression is higher in SLE patients with lymphocytopenia before treatment.

Keywords

Systemic lupus erythematosus Interferon stimulated gene 15 Lymphocytopenia 

Expression des interferonstimulierten Gens 15 bei systemischem Lupus erythematosus

Diagnostische Bedeutung und Zusammenhang mit Lymphozytopenie

Zusammenfassung

Hintergrund

Ziel der vorliegenden Studie war es, einerseits den Zusammenhang zwischen der Expression des interferonstimulierten Gens 15 (ISG15) und der klinischen Manifestation des systemischen Lupus erythematosus (SLE) zu ermitteln und andererseits die diagnostische Bedeutung von ISG15 bei SLE zu untersuchen.

Patienten und Methoden

Die Studie umfasst 28 Patienten mit Erstdiagnose eines SLE, 10 Patienten mit undifferenzierter Bindgewebserkrankung und 22 gesunde Probanden. Von den SLE-Patienten wurden 14 für eine 4‑wöchige Nachbeobachtung ausgewählt. Die ISG15-Expression in den gesamten Blutzellen wurde mittels quantitativer Polymerasekettenreaktion bestimmt. Zu Beginn und nach der Behandlung wurden klinische und Laborparameter erhoben.

Ergebnisse

Der ISG15-mRNA-Wert war in den gesamten Blutzellen bei SLE-Patienten höher als bei der Kontrollgruppe mit anderen Erkrankungen und als in der gesunden Kontrollgruppe. Außerdem war er mit der Krankheitsaktivität des SLE korreliert, was mit dem SLE-Krankheitsaktivitätsindex sowie Zeichen der Serositis und Anämie zu Beginn ermittelt wurde. Die ISG15-Expression korrelierte mit dem Bestehen einer Lymphozytopenie bei Patienten mit aktivem SLE vor der Behandlung. In der Receiver-Operating-Characteristic-Curve-Analyse betrug die Fläche unter der Kurve für die ISG15-Expression 0,826 (p = 0,000015).

Schlussfolgerung

Die ISG15-Expression ist bei SLE-Patienten relativ hoch und korreliert mit der Krankheitsaktivität vor Behandlung. Bei SLE-Patienten mit Lymphozytopenie ist die ISG15-Expression vor Therapie höher.

Schlüsselwörter

Systemischer Lupus erythematosus Interferonstimuliertes Gen 15 Lymphozytopenie 

Notes

Acknowledgements

We thank the members of the Department of Rheumatology and Immunology in the hospital for their contributions to the immunological characterization of the patient. We thank all the patients and their family for their support and cooperation.

Funding

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.

Compliance with ethical guidelines

Conflict of interest

Y. Yuan, H. Ma, Z. Ye, W. Jing and Z. Jiang declare that they have no competing interests.

The current study was approved by the Institutional Medical Ethics Review Board of the First Hospital of Jilin University. Written informed consent was obtained from each patient in compliance with the Declaration of Helsinki.

Supplementary material

393_2017_274_MOESM1_ESM.docx (19 kb)
Table S1. Clinical and demographic characteristics of the lymphocytopenia group and the non-lymphocytopenia group at baseline

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Department of Rheumatology and Immunology, the First HospitalJilin UniversityChangchunChina
  2. 2.Department of Gerontology, the First HospitalJilin UniversityChangchunChina

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