Circulating levels of citrullinated and MMP-degraded vimentin (VICM) in liver fibrosis related pathology

Efstathios Vassiliadis, Claudia P Oliveira, Mario R Alvares-da-Silva, Chen Zhang, Flair J Carrilho, Jose T Stefano, Fabiola Rabelo, Leila Pereira, Camila R Kappel, Kim Henriksen, Sanne Skovgård Veidal, Ben Vainer, Kevin L Duffin, Claus Christiansen, Diana J Leeming, Morten Karsdal

43 Citations (Scopus)

Abstract

Aim: To investigate whether increased levels of vimentin citrullinated peptides identified by MS in articular cartilage can be measured in pathologies other than rheumatoid arthritis and be utilised for diagnostic purposes. Methods: A monoclonal antibody against the sequence RLRSSVPGV-citrulline (VICM) was developed and evaluated in a carbon tetrachloride (CCI4) (n=52 + 28 controls) rat model of liver fibrosis and two clinical cohorts of adult patients with hepatitis C (HCV) (n=92) and non-alcoholic fatty liver disease (NAFLD) (n=62), and compared to healthy controls. Results: In CCI4-treated rats, mean systemic VICM levels increased 31% at week 12 (176 ng/mL, P<0.001), 41.7% at weeks 16 (190 ng/mL, P<0.001), 49.2% at weeks 20 (200 ng/ml, P<0.001), compared to controls (134 ng/mL). VICM levels correlated with total hepatic collagen determined by Sirius red staining of rat livers (r=0.75, P<0.05). In the HCV cohort, when stratified according to the METAVIR F score, VICM levels were 63% higher in FO (632 ng/mL ±75, p<0.05), 54% in F1 (597 ng/mL ±41.3, p<0.05) and 62% in F2 (628 ng/mL ±59, p<0.05) all compared to controls. In the NAFLD cohort, VICM levels were 20.6% higher in FO (339 ±12 ng/mL, P<0.05), 23.8% in F1 (348 ±12 ng/mL, P<0.05) and 28.8% in F2 (362 ±25 P<0.05). Conclusion: We demonstrated increased serological levels of citrullinated and MMP degraded vimentin in an animal model of liver fibrosis and in early fibrosis associated with HCV and NAFLD patients. These data suggest that citrullinated and MMP degraded proteins are also present in liver fibrosis.

Original languageEnglish
JournalAmerican Journal of Translational Research
Volume4
Issue number4
Pages (from-to)403-14
Number of pages12
ISSN1943-8141
Publication statusPublished - 2012

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