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eISSN: 2084-9893
ISSN: 0033-2526
Dermatology Review/Przegląd Dermatologiczny
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SCImago Journal & Country Rank
2/2019
vol. 106
 
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abstract:
Original article

Serum concentration of beta-trace protein (BTP) as a potential biomarker of systemic sclerosis

Jakub Żółkiewicz
1
,
Anna Stochmal
1
,
Michał Zaremba
1
,
Lidia Rudnicka
1
,
Joanna Czuwara
1

  1. Department of Dermatology, Medical University of Warsaw, Poland
    Katedra i Klinika Dermatologiczna Warszawskiego Uniwersytetu Medycznego, Polska
Dermatol Rev/Przegl Dermatol 2019, 106, 173–184
Online publish date: 2019/06/13
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Introduction
Systemic sclerosis is a connective tissue disease of unknown etiology characterized by endothelial cell injury, inflammation and fibrosis. Beta-trace protein (BTP) catalyzes conversion of prostaglandin H2 to prostaglandin D2. Prostaglandin D2 stimulates the vascular response by DP1 and allergic reactions by CRTH2.

Objective
To evaluate serum BTP in systemic sclerosis and correlate it with systemic sclerosis subtype, C-reactive protein, disease duration, skin fibrosis, and vascular and internal organ involvement.

Material and methods
Forty-six patients with systemic sclerosis and 30 healthy volunteers were included in the study. Clinical and laboratory data were collected including specific antibodies, interstitial lung disease, esophageal involvement, digital pitting scars, disease duration, Raynaud’s phenomenon and modified Rodnan skin score. BTP levels were analyzed by ELISA. Statistical analysis was performed by c2, Student’s t-test and Mann-Whitney-U test. Pearson and Spearman correlation analyses were used to establish variables’ association. The significance threshold was set at p < 0.05.

Results
Patients with systemic sclerosis had significantly higher serum BTP concentration in comparison to healthy controls at p = 0.0003. No association between BTP levels and C-reactive protein, internal organ involvement, disease duration, autoantibodies and Raynaud’s phenomenon onset was found. Patients who developed pitting scars and fingertip ulcerations had significantly higher BTP serum levels than those without these symptoms (p = 0.03).

Conclusions
Significantly elevated BTP in systemic sclerosis at p < 0.001 may indicate the role of BTP in disease pathogenesis, since a BTP-dependent effect can be involved in three main features of systemic sclerosis: inflammation/autoimmunity, vasocontraction and fibrosis. Further studies with larger numbers of patients are required to fully establish the prognostic and diagnostic significance of BTP in systemic sclerosis.

keywords:

beta-trace protein, prostaglandin D-synthase, systemic sclerosis, prostanoids, digital pits



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