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Published in: Arthritis Research & Therapy 1/2010

Open Access 01-02-2010 | Research article

Regulation of IFN response gene activity during infliximab treatment in rheumatoid arthritis is associated with clinical response to treatment

Authors: Lisa GM van Baarsen, Carla A Wijbrandts, François Rustenburg, Tineke Cantaert, Tineke CTM van der Pouw Kraan, Dominique L Baeten, Ben AC Dijkmans, Paul P Tak, Cornelis L Verweij

Published in: Arthritis Research & Therapy | Issue 1/2010

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Abstract

Introduction

Cross-regulation between TNF and type I IFN has been postulated to play an important role in autoimmune diseases. Therefore, we determined the effect of TNF blockade in rheumatoid arthritis (RA) on the type I IFN response gene activity in relation to clinical response.

Methods

Peripheral blood from 33 RA patients was collected in PAXgene tubes before and after the start of infliximab treatment. In a first group of 15 patients the baseline expression of type I IFN-regulated genes was determined using cDNA microarrays and compared to levels one month after treatment. The remaining 18 patients were studied as an independent group for validation using quantitative polymerase chain reaction (qPCR).

Results

Gene expression analysis revealed that anti-TNF antibody treatment induced a significant increase in type I IFN response gene activity in a subset of RA patients, whereas expression levels remained similar or were slightly decreased in others. The findings appear clinically relevant since patients with an increased IFN response gene activity after anti-TNF therapy had a poor clinical outcome. This association was confirmed and extended for an IFN response gene set consisting of OAS1, LGALS3BP, Mx2, OAS2 and SERPING1 in five EULAR good and five EULAR poor responders, by qPCR.

Conclusions

Regulation of IFN response gene activity upon TNF blockade in RA is not as consistent as previously described, but varies between patients. The differential changes in IFN response gene activity appear relevant to the clinical outcome of TNF blockade in RA.
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Metadata
Title
Regulation of IFN response gene activity during infliximab treatment in rheumatoid arthritis is associated with clinical response to treatment
Authors
Lisa GM van Baarsen
Carla A Wijbrandts
François Rustenburg
Tineke Cantaert
Tineke CTM van der Pouw Kraan
Dominique L Baeten
Ben AC Dijkmans
Paul P Tak
Cornelis L Verweij
Publication date
01-02-2010
Publisher
BioMed Central
Published in
Arthritis Research & Therapy / Issue 1/2010
Electronic ISSN: 1478-6362
DOI
https://doi.org/10.1186/ar2912

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