Liver Fibrosis – Mouse Models and Relevance in Human Liver Diseases

I. Mederacke

doi:10.1055/s-0032-1330422

Zeitschrift für Gastroenterologie, Table of Contents

Z Gastroenterol 2013; 51(1): 55-62
DOI: 10.1055/s-0032-1330422

Übersicht

Liver Fibrosis – Mouse Models and Relevance in Human Liver Diseases

Leberfibrose – Mausmodelle und Relevanz für humane Lebererkrankungen

I. Mederacke

¹Division of Digestive and Liver Diseases, Department of Medicine, Columbia University, New York, NY, USA

²Klinik für Gastroenterologie, Hepatologie und Endokrinologie, Medizinische Hochschule Hannover, Germany

› Author Affiliations

Abstract

Liver fibrosis, the excessive accumulation of extracellular matrix (ECM) in the liver, develops as a long-term consequence of chronic liver injury, and significantly contributes to the mortal complications of chronic liver disease. Different cell types contribute to the hepatic wound healing response. Hepatic stellate cells (HSC) are the main fibrogenic cell in the liver. Upon liver injury, HSCs transdifferentiate into myofibroblasts and contribute to ECM deposition in the liver. Small animal models have provided insight into the activation process of HSCs and the complex interplay of the different cell types involved in liver fibrogenesis. Animal models not only allow one to identify relevant profibrogenic pathways, but also to test the contribution of these pathways to liver disease in preclinical settings. In this review, mouse models of toxic, cholestatic, apoptotic, acoholic, viral and metabolic liver fibrosis will be discussed, with a particular emphasis on the underlying pathophysiology, relevance to human liver disease and drug development.

Zusammenfassung

Leberfibrose, die Akkumulation extrazellulären Matrixproteins (ECM) in der Leber, ist die Folge chronischer Leberentzündung und maßgeblich für die Morbidität und Mortalität chronischer Lebererkrankungen verantwortlich. Hepatische Sternzellen (HSC) stellen die wichtigste fibrogene Zellpopulation der Leber dar. Nach Aktivierung transdifferenzieren HSCs zu Myofibroblasten und produzieren ECM. Tiermodelle konnten Aufschluss über die Aktvierung von HSC geben und das komplexe Zusammenspiel verschiedener Zellpopulationen während der Fibrogenese in der Leber näher beleuchten. Tiermodelle erlauben zum einen, die Identifikation profibrogener Signalwege, zum anderen aber auch deren Rolle im präklinischen Rahmen von verschiedenen Lebererkrankungen zu untersuchen. Dieser Übersichtsartikel soll Mausmodelle basierend auf der zugrunde liegenden Leberschädigung (toxisch, cholestatisch, apoptotisch, alkoholisch, viral und metabolisch) diskutieren sowie die entsprechende Pathophysiologie und Relevanz zur humanen Erkrankung und der Entwicklung von spezifischen Therapien erörtern.

Schlüsselwörter

Leber - Fibrose - molekulare Mechanismen - Mausmodelle

Key words

Liver - fibrosis - molecular mechanism - mouse models

Full Text

References

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