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Optimized Analysis of In Vivo and In Vitro Hepatic Steatosis
Published on: March 11, 2017
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ADAMTS12 is a stromal modulator in chronic liver disease
Bassil Dekky1, Fida Azar1, Dominique Bonnier1
1University of Rennes, INSERM, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail)-UMR_S 1085, Rennes, France.
Summary
ADAMTS12, a key adamalysin, modulates hepatic stellate cell differentiation and impacts chronic liver disease progression. Its dysregulation is linked to hepatocellular carcinoma recurrence and fibrosis.
Area of Science:
- Biochemistry
- Cell Biology
- Oncology
Background:
- Adamalysins, including ADAMs and ADAMTSs, are crucial matrisome proteins involved in diverse biological and pathological processes.
- Hepatocellular carcinoma (HCC) development and progression are complex, involving intricate cellular and molecular interactions within the tumor microenvironment.
Purpose of the Study:
- To investigate the role of adamalysins in hepatocellular carcinoma (HCC) using in silico screening of patient data.
- To elucidate the specific function of ADAMTS12 in liver fibrosis and hepatic stellate cell (HSC) differentiation.
Main Methods:
- In silico screening of a liver cancer dataset from the International Cancer Genome Consortium.
- Analysis of ADAMTS12 expression in HCC patient tissues and a mouse model of carbon tetrachloride-induced liver injury.
- Gene silencing and TGF-β treatment in the HSC-derived LX-2 cell line to assess phenotypic and gene expression changes.
Main Results:
- A cluster of adamalysins was co-expressed in HCC livers, with ADAMTS12 strongly associated with recurrence risk and poor differentiation.
- ADAMTS12 is expressed in stromal cells and activated HSCs in HCC and fibrotic tissues.
- Adamts12-null mice exhibited exacerbated fibrosis in a chronic liver injury model, and ADAMTS12 silencing in HSCs led to dedifferentiation and altered gene expression, including PAI-1 down-regulation, which was reversible by TGF-β.
Conclusions:
- ADAMTS12 acts as a critical modulator of HSC differentiation and plays a significant role in the pathogenesis of chronic liver disease.
- ADAMTS12 represents a potential therapeutic target for managing liver fibrosis and HCC progression.
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