Abstract:
OBJECTIVES:We aimed to assess the clinical significance of Krebs von den Lungen-6 (KL-6) in the diagnosis and severity of interstitial lung disease (ILD) in a French cohort of patients with systemic sclerosis (SSc). METHODS:Serum KL-6 concentrations were measured with chemiluminescent enzyme immunoassay (CLEIA) in 75 SSc patients. Patients were divided into two groups according to the presence of interstitial lung disease (SSc-ILD versus SSc-without ILD) on chest High-Resolution Computed Tomography. Pulmonary function tests, main manifestations and severity of the lung disease (Medsger's severity scale) were collected. RESULTS:KL-6 serum concentrations were significantly higher in SSc-ILD patients than in those without ILD (p < 10-4) and were inversely correlated with forced vital capacity, total lung capacity and diffuse lung capacity of carbon monoxide. Serum KL-6 level superior to 872 U/ml appeared as the optimal cut-off value associated with ILD. Patients with a restrictive pulmonary syndrome and dyspnoea had significant higher KL-6 serum concentrations. SSc patients with anti-topoisomerase 1 antibodies had higher KL-6 serum levels than patients with anti-centromere antibodies (p < 10- 4). ILD and anti-topoisomerase 1 antibodies were independent factors associated with KL-6 in multivariate analysis. Interestingly, KL-6 serum concentrations positively increased with the patient lung severity. CONCLUSIONS:Our study confirms that KL-6 is an accurate biomarker for the diagnosis of SSc-ILD in a French cohort of patients. High KL-6 levels should prompt physicians to assess ILD with pulmonary imaging and pulmonary functions tests. Prospective clinical studies are still required to determine whether levels of KL-6 might predict progression of ILD as well as its usefulness in the timing of therapeutic intervention.
journal_name
Rheumatol Intjournal_title
Rheumatology internationalauthors
Benyamine A,Heim X,Resseguier N,Bertin D,Gomez C,Ebbo M,Harlé JR,Kaplanski G,Rossi P,Bardin N,Granel Bdoi
10.1007/s00296-018-3987-3subject
Has Abstractpub_date
2018-05-01 00:00:00pages
813-819issue
5eissn
0172-8172issn
1437-160Xpii
10.1007/s00296-018-3987-3journal_volume
38pub_type
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