Abstract
Background and Aims
Progressive fibrosis increases hepatic resistance and causes portal hypertension with complications. During progressive fibrosis remodeling and deposition of collagens and elastin occur. Elastin remodeling is crucially involved in fibrosis progression in animal models and human data. This study investigated the association of circulating elastin with the clinical outcome in cirrhotic patients with severe portal hypertension receiving transjugular intrahepatic porto-systemic shunt (TIPS).
Methods
We analyzed portal and hepatic venous samples of 110 cirrhotic patients obtained at TIPS insertion and 2 weeks later. The circulating levels of elastin fragments (ELM) were determined using specific monoclonal ELISA. The relationship of ELM with clinical short-time follow-up and long-term outcome was investigated.
Results
Circulating levels of ELM showed a gradient across the liver before TIPS with higher levels in the hepatic vein. Interestingly, the circulating ELM levels remained unchanged after TIPS. The circulating levels of ELM in portal and hepatic veins correlated with platelet counts and inversely with serum sodium. Hepatic venous levels of ELM were higher in CHILD C compared to CHILD A and B and were associated with the presence of ascites. Patients with high levels of ELM in the hepatic veins before TIPS showed poorer survival. In multivariate analysis ELM levels in the hepatic veins and MELD were independent predictors of mortality in these patients.
Conclusion
This study demonstrated that circulating levels of ELM are not associated with hemodynamic changes, but might reflect fibrosis remodeling and predict survival in patients with severe portal hypertension receiving TIPS independently of MELD.
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Abbreviations
- TIPS:
-
Transjugular intrahepatic portosystemic shunt
- ECM:
-
Extracellular matrix
- MMPs:
-
Matrix metalloproteinases
- PSPG:
-
Portal systemic pressure gradient
- ELM:
-
MMP-degraded elastin
- TMB:
-
Tetramethyl benzinidine
- AUC:
-
Area under the curve
- MELD:
-
Model for end-stage liver disease
- CI:
-
Confidence interval
- BUN:
-
Blood urea nitrogen
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Acknowledgments
The authors thank G. Hack, S. Bellinghausen, D. Bammer, L. Larsen, and HT. Nguyen for excellent technical assistance. Furthermore, we thank our statistician Inger Byrjalsen for statistical guidance. The study was supported by grants of Deutsche Forschungsgemeinschaft (SFB TRR57 to P18), grants of H. J. & W. Hector Foundation (M60.2), grants of the Danish Agency for Science Technology and Innovation, and grants of the Danish Research Foundation.
Conflict of interest
Mette Juul Nielsen, Diana J. Leeming, and Morten A. Karsdal are employees of Nordic Bioscience, a company engaged in the development of biochemical markers. Morten A Karsdal holds stocks in Nordic Bioscience.
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M. J. Nielsen and J. Lehmann have contributed equally to this work.
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Nielsen, M.J., Lehmann, J., Leeming, D.J. et al. Circulating Elastin Fragments Are Not Affected by Hepatic, Renal and Hemodynamic Changes, But Reflect Survival in Cirrhosis with TIPS. Dig Dis Sci 60, 3456–3464 (2015). https://doi.org/10.1007/s10620-015-3783-9
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DOI: https://doi.org/10.1007/s10620-015-3783-9