Osteopontin and Disease Activity in Patients with Recent-onset Systemic Lupus Erythematosus: Results from the SLICC Inception Cohort.
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Urowitz, Murray B
Gladman, Dafna D
Fortin, Paul R
Clarke, Ann E
Hanly, John G
Isenberg, David A
Alarcón, Graciela S
Chatham, W Winn
Dooley, Mary Anne
van Vollenhoven, Ronald
Kamen, Diane L
Bruce, Ian N
Journal titleThe Journal of rheumatology
Publication Begin page492
Publication End page500
MetadataShow full item record
AbstractIn cross-sectional studies, elevated osteopontin (OPN) levels have been proposed to reflect, and/or precede, progressive organ damage and disease severity in systemic lupus erythematosus (SLE). We aimed, in a cohort of patients with recent-onset SLE, to determine whether raised serum OPN levels precede damage and/or are associated with disease activity or certain disease phenotypes.
We included 344 patients from the Systemic Lupus International Collaborating Clinics (SLICC) Inception Cohort who had 5 years of followup data available. All patients fulfilled the 1997 American College of Rheumatology (ACR) criteria. Baseline sera from patients and from age- and sex-matched population-based controls were analyzed for OPN using ELISA. Disease activity and damage were assessed at each annual followup visit using the SLE Disease Activity Index 2000 (SLEDAI-2K) and the SLICC/ACR damage index (SDI), respectively.
Compared to controls, baseline OPN was raised 4-fold in SLE cases (p < 0.0001). After relevant adjustments in a binary logistic regression model, OPN levels failed to significantly predict global damage accrual defined as SDI ≥ 1 at 5 years. However, baseline OPN correlated with SLEDAI-2K at enrollment into the cohort (r = 0.27, p < 0.0001), and patients with high disease activity (SLEDAI-2K ≥ 5) had raised serum OPN (p < 0.0001). In addition, higher OPN levels were found in patients with persistent disease activity (p = 0.0006), in cases with renal involvement (p < 0.0001) and impaired estimated glomerular filtration rate (p = 0.01).
The performance of OPN to predict development of organ damage was not impressive. However, OPN associated significantly with lupus nephritis and with raised disease activity at enrollment, as well as over time.
CitationWirestam L, Enocsson H, Skogh T, Padyukov L, Jönsen A, Urowitz MB, Gladman DD, Romero-Diaz J, Bae SC, Fortin PR, Sanchez-Guerrero J, Clarke AE, Bernatsky S, Gordon C, Hanly JG, Wallace D, Isenberg DA, Rahman A, Merrill J, Ginzler E, Alarcón GS, Chatham WW, Petri M, Khamashta M, Aranow C, Mackay M, Dooley MA, Manzi S, Ramsey-Goldman R, Nived O, Steinsson K, Zoma A, Ruiz-Irastorza G, Lim S, Kalunian K, Inanc M, van Vollenhoven R, Ramos-Casals M, Kamen DL, Jacobsen S, Peschken C, Askanase A, Stoll T, Bruce IN, Wetterö J, Sjöwall C. Osteopontin and Disease Activity in Patients with Recent-onset Systemic Lupus Erythematosus: Results from the SLICC Inception Cohort. J Rheumatol. 2019 May;46(5):492-500. doi: 10.3899/jrheum.180713. Epub 2019 Jan 15. PMID: 30647177; PMCID: PMC7339909.
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