Advances in Clinical and Experimental Medicine

Adv Clin Exp Med
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Advances in Clinical and Experimental Medicine

2017, vol. 26, nr 8, November, p. 1231–1236

doi: 10.17219/acem/68627

Publication type: original article

Language: English

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Creative Commons BY-NC-ND 3.0 Open Access

Serum osteopontin and vitronectin levels in systemic sclerosis

Baris Gundogdu1,A,D,F, Servet Yolbas1,B, Musa Yilmaz2,C, Suleyman Aydin2,C, Sulayman Serdar Koca1,A,D,E,F

1 Department of Rheumatology, Faculty of Medicine, Firat University, Elazığ, Turkey

2 Department of Biochemistry, Faculty of Medicine, Firat University, Elazığ, Turkey

Abstract

Background. Osteopontin a matricellular protein has pro-fibrotic effects and binds integrin such as αvβ1 and αvβ3. Vitronectin is one of the integrin αvβ3 ligands and is a multifunctional glycoprotein.
Objectives. The aim of the present study was to evaluate serum osteopontin and vitronectin levels in a cohort of patients with systemic sclerosis (SSc).
Material and Methods. Eighty-six patients with SSc, 46 patients with systemic lupus erythematosus (SLE), and 38 healthy controls (HC) were enrolled in the study. Serum osteopontin, vitronectin, IL-6, and TGF-β levels were analyzed.
Results. Serum osteopontin levels were higher in the SSc and SLE groups compared to the HC group (p < 0.01 and p < 0.001, respectively). However, it was not correlated with disease activity and severity scores in the SSc group. On the other hand, serum vitronectin levels were lower in the SSc group than in the SLE and HC groups (p < 0.001 for both).
Conclusion. These results may suggest that osteopontin levels may be increased due to the inflammatory process and osteopontin has not a specific role on fibrosis in SSc. On the other hand, serum vitronectin levels decrease in SSc in contrast to SLE. It may be concluded that the one cause of decreased serum vitronectin levels in SSc may be its accumulation in fibrotic area.

Key words

systemic sclerosis, osteopontin, vitronectin

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