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Anti-inflammatory and anticoagulant properties of the protein C system in inflammatory bowel disease
Danuta Owczarek1, Dorota Cibor, Kinga Sałapa
1Department of Gastroenterology, Hepatology and Infectious Diseases, Jagiellonian University Medical College, Kraków, Poland. owczarek@su.krakow.pl
Insights
The protein C (PC) pathway is defective in inflammatory bowel disease (IBD) patients, contributing to hypercoagulability. This defect is linked to inflammation and observed in both active and inactive disease stages.
Area of Science:
- Hematology
- Gastroenterology
- Immunology
Background:
- Inflammatory bowel disease (IBD) involves an imbalance in hemostatic factors.
- Deficiencies in the protein C (PC) pathway can worsen thrombosis and inflammation in IBD.
Purpose of the Study:
- To evaluate protein C (PC) pathway components in IBD patients.
- To determine correlations between PC system components and IBD disease activity.
Main Methods:
- Measured levels of PC, free protein S (PS), and soluble thrombomodulin (sTM) in patients with ulcerative colitis (UC) and Crohn's disease (CD), and healthy controls.
- Assessed correlations between PC system components, disease activity, hemostatic variables, and inflammatory markers.
Main Results:
- Elevated sTM levels in UC patients compared to controls.
- Higher PC activity and lower PS activity observed in IBD patients versus controls.
- PC levels correlated with UC disease activity, but inflammatory markers (TNF-α, IL-6) did not correlate with PC system components.
Conclusions:
- The protein C (PC) pathway is impaired in both Crohn's disease (CD) and ulcerative colitis (UC).
- Hypercoagulability in IBD may stem from inflammation and anticoagulant system disturbances.
- Defective PC pathway function is present regardless of disease activity in IBD.
Introduction:
In patients with inflammatory bowel disease (IBD), disbalance between procoagulant, anticoagulant, and fibrinolytic factors has been shown. The hemostatic system is an indispensable component of the inflammatory process. Deficiencies in the protein C (PC) pathway components not only promote thrombosis, but also exacerbate inflammation.
Objectives:
The aim of the study was to assess the components of the PC system and their correlations with disease activity in patients with IBD.
Patients And Methods:
The levels of PC, free protein S (PS), and soluble thrombomodulin (sTM) were measured in 55 consecutive patients with ulcerative colitis (UC), 50 patients with Crohn's disease (CD), and 41 healthy volunteers. Correlations between PC system components and disease activity, hemostatic variables, and inflammatory markers were assessed.
Results:
sTM levels in patiens with UC were higher compared with controls (24.5 vs. 17.5 ng/ml; P = 0.0042). In patients with IBD, PC activity was higher and PS activity was lower compared with controls (P <0.001). Tumor necrosis factor α (TNF-α) levels were higher in patients with IBD, and interleukin 6 (IL-6) levels were higher only in patients with CD. In patients with UC, a positive correlation was observed between sTM and both PC and PS levels (r = 0.28 and r = 0.34, respectively, P <0.05). Only PC levels correlated with UC activity (r = 0.3, P <0.05). No correlations of TNF-α, IL-6, and C-reactive protein with PC, PS, and sTM levels were observed.
Conclusions:
The PC pathway is defective in patients with CD and UC. Hypercoagulability in IBD might be associated not only with the inflammatory process but also with disturbances in the anticoagulant system, since defective PC pathway was observed both in active and nonactive disease.
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