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Τετάρτη 3 Φεβρουαρίου 2016

Sclerostin serum levels in patients with systemic autoimmune diseases

Systemic autoimmune diseases (SADs) are associated with lower bone mass and an increased risk of fractures. Sclerostin has a pivotal role in bone metabolism. Available data on circulating sclerostin levels in healthy subjects are limited, whereas those in SAD patients are absent. Our objective was to determine circulating sclerostin concentrations in systemic lupus erythematosus (SLE), systemic sclerosis (SSc) and Crohn's disease (CD) patients, and to analyze the factors associated with sclerostin concentrations. In this cross-sectional case–control study, serum sclerostin levels were measured in 38 SLE patients, 20 CD patients, 8 SSc patients and 20 healthy controls using a sclerostin ELISA. The mean values of the sclerostin (95% confidence interval) were 35.36 pmol l−1 (12–101) in patients and 33.92 pmol l−1 (2.31–100) in control subjects. The mean sclerostin value was 36.4 pmol l−1 (22.1–48.5) in SLE patients, 26.7 pmol l−1 (17.3–36.3) in CD patients and 51.8 pmol l−1 (26.5–77.1) in SSc patients (P=0.001). Serum sclerostin levels were positively correlated with age (P<0.001), body mass index (BMI) (P=0.01) and lumbar spine Z-score (P=0.001) and negatively with creatinine clearance (P=0.001). Glucocorticoid treatment did not affect sclerostin levels. Sclerostin levels seem to have a heterogeneous pattern in different autoimmune diseases. SLE and SSc patients did not differ from healthy controls regarding sclerostin levels. The CD group had significantly lower values compared with SSc patients. Factors associated with sclerostin levels in autoimmune diseases seem to be the same than in the general population.

BoneKEy Reports 5 doi: 10.1038/bonekey.2016.2



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