Increased circulating VAP-1 levels are associated with liver fibrosis in chronic hepatitis C infection

Marcel Kraemer, Marcin Krawczyk, Fozia Noor, Frank Grünhage, Frank Lammert, Jochen G. Schneider*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)


Vascular adhesion protein-1 (VAP-1) is a multifunction protein. While membrane-bound VAP-1 is an adhesion protein, soluble VAP-1 catalyzes the deamination of primary amines through its semicarbazide-sensitive amino oxidase (SSAO) activity. VAP-1 supports the transmigration of leukocytes and increases oxidative stress. In chronic liver diseases, it plays a role in leukocyte infiltration and fibrogenesis. Here, we measured VAP-1 plasma concentration and its SSAO activity in 322 patients with chronic hepatitis C infection and evaluated the association of VAP-1 with fibrosis stages. VAP-1 concentration strongly correlated with liver stiffness and was the second strongest influencing variable after gamma-glutamytransferase (GGT) for liver stiffness in regression analysis. The VAP-1 concentration increased with advancing fibrosis stages and the highest concentrations were found in patients with cirrhosis. According to the receiver operating characteristic (ROC) analysis, a VAP-1 cut-off value of 541 ng/mL predicted histologically confirmed cirrhosis (sensitivity 74%; specificity 72%). SSAO activity correlated only moderately with liver stiffness, showing a relatively small increase in advanced fibrosis. To our knowledge, this is the first study on VAP-1 in chronic hepatitis C infection showing its association with progressive fibrosis. In conclusion, VAP-1 plasma concentration, rather than its SSAO activity, may represent a non-invasive biomarker for monitoring fibrogenesis in patients with chronic hepatitis C infection.

Original languageEnglish
Article number103
JournalJournal of Clinical Medicine
Issue number1
Publication statusPublished - Jan 2019
Externally publishedYes


  • Chronic liver diseases
  • Fibroscan
  • Fibrosis
  • HCV
  • Liver stiffness
  • SSAO activity
  • Semicarbazide-sensitive amino oxidase
  • VAP-1
  • Vascular adhesion protein 1


Dive into the research topics of 'Increased circulating VAP-1 levels are associated with liver fibrosis in chronic hepatitis C infection'. Together they form a unique fingerprint.

Cite this