Ahmed, Usman, Anwar, Attia, Savage, Richard S., Costa, Matthew L., Mackay, N., Filer, Andrew, Raza, Karim, Watts, Richard, Winyard, P. G., Haigh, R. C., Thornalley, Paul J. and Rabbani, Naila (2015) Biomarker combination detects early-stage and discriminates osteoarthritis, rheumatoid arthritis and other inflammatory joint disease. Scientific Reports (5). L9259. doi:10.1038/srep09259

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Abstract

There is currently no biochemical test for detection of early-stage osteoarthritis (eOA). Tests for early-stage rheumatoid arthritis (eRA) such as rheumatoid factor (RF) and anti–cyclic citrullinated peptide (CCP) antibodies require refinement to improve clinical utility. We developed robust mass spectrometric methods to quantify citrullinated protein (CP) and free hydroxyproline in body fluids. We detected CP in the plasma of healthy subjects and surprisingly found that CP was increased in both patients with eOA and eRA whereas anti–CCP antibodies were predominantly present in eRA. A 4-class diagnostic algorithm combining plasma/serum CP, anti-CCP antibody and hydroxyproline applied to a cohort gave specific and sensitive detection and discrimination of eOA, eRA, other non-RA inflammatory joint diseases and good skeletal health. This provides a first-in-class plasma/serum-based biochemical assay for diagnosis and type discrimination of early-stage arthritis to facilitate improved treatment and patient outcomes, exploiting citrullinated protein and related differential autoimmunity.

Item Type:	Journal Article
Subjects:	Q Science > QR Microbiology > QR180 Immunology R Medicine > RC Internal medicine
Divisions:	Faculty of Medicine > Warwick Medical School > Biomedical Sciences > Translational & Experimental Medicine > Metabolic and Vascular Health (- until July 2016) Faculty of Science > Centre for Systems Biology Faculty of Medicine > Warwick Medical School
Library of Congress Subject Headings (LCSH):	Joints -- Inflammation -- Diseases -- Prevention, Osteoarthritis, Rheumatoid arthritis, Biochemical markers
Journal or Publication Title:	Scientific Reports
Publisher:	Nature Publishing Group
ISSN:	2045-2322
Official Date:	19 March 2015
Dates:	Date Event 19 March 2015 Published 27 February 2015 Accepted 16 September 2014 Submitted
Number:	5
Article Number:	L9259
DOI:	10.1038/srep09259
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access

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