Published in
Public Library of Science, PLoS ONE, 5(8), p. e59868, 2013
DOI: 10.1371/journal.pone.0059868
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Serum levels of beta2-microglobulin and free light chains of immunoglobulins are associated with systemic disease activity in primary Sjögren's syndrome. Data at enrollment in the prospective ASSESS cohort.
,
Jean-Jacques Dubost,
Anne-Laure Fauchais,
Vincent Goeb ,
Eric Hachulla ,
Pierre Yves Hatron,
Claire Larroche,
Véronique Le Guern,
Véronique Le Guern,
Jacques Morel
and other authors.
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Abstract
OBJECTIVES: To analyze the clinical and immunological characteristics at enrollment in a large prospective cohort of patients with primary Sjögren's syndrome (pSS) and to investigate the association between serum BAFF, beta2-microglobulin and free light chains of immunoglobulins and systemic disease activity at enrollment. METHODS: Three hundred and ninety five patients with pSS according to American-European Consensus Criteria were included from fifteen centers of Rheumatology and Internal Medicine in the "Assessment of Systemic Signs and Evolution of Sjögren's Syndrome" (ASSESS) 5-year prospective cohort. At enrollment, serum markers were assessed as well as activity of the disease measured with the EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI). RESULTS: Patient median age was 58 (25(th)-75(th): 51-67) and median disease duration was 5 (2-9) years. Median ESSDAI at enrollment was 2 (0-7) with 30.9% of patients having features of systemic involvement. Patients with elevated BAFF, beta2-microglobulin and kappa, lambda FLCS had higher ESSDAI scores at enrollment (4 [2]-[11] vs 2 [0-7], P = 0.03; 4 [1]-[11] vs 2 [0-7], P