Cirrhotic Human Liver Extracellular Matrix 3D Scaffolds Promote Smad-Dependent TGF-β1 Epithelial Mesenchymal Transition

• Main Authors: Giuseppe Mazza, Andrea Telese, Walid Al-Akkad, Luca Frenguelli, Ana Levi, Martina Marrali, Lisa Longato, Kessarin Thanapirom, Maria Giovanna Vilia, Benedetta Lombardi, Claire Crowley, Mark Crawford, Morten A. Karsdal, Diana J. Leeming, Giusi Marrone, Katrin Bottcher, Benjamin Robinson, Armando Del Rio Hernandez, Domenico Tamburrino, Gabriele Spoletini, Massimo Malago, Andrew R. Hall, Jasminka Godovac-Zimmermann, Tu Vinh Luong, Paolo De Coppi, Massimo Pinzani, Krista Rombouts
• Format: Article
• Language: English
• Published: MDPI AG 2019-12-01
• Series: Cells
• Subjects: hepatocellular carcinoma (hcc); tumor microenvironment (tme); 3-dimensional (3d) platform; 3d ecm scaffolds; decellularized human liver; decellularized extracellular matrix (decm); proteomics; hepatocellular carcinoma cells; transforming growth factor beta1 (tgf-β1); tissue engineering
• Online Access: https://www.mdpi.com/2073-4409/9/1/83

An altered liver microenvironment characterized by a dysregulated extracellular matrix (ECM) supports the development and progression of hepatocellular carcinoma (HCC). The development of experimental platforms able to reproduce these physio-pathological conditions is essential in order to identify and validate new therapeutic targets for HCC. The aim of this work was to validate a new in vitro model based on engineering three-dimensional (3D) healthy and cirrhotic human liver scaffolds with HCC cells recreating the micro-environmental features favoring HCC. Healthy and cirrhotic human livers ECM scaffolds were developed using a high shear stress oscillation-decellularization procedure. The scaffolds bio-physical/bio-chemical properties were analyzed by qualitative and quantitative approaches. Cirrhotic 3D scaffolds were characterized by biomechanical properties and microarchitecture typical of the native cirrhotic tissue. Proteomic analysis was employed on decellularized 3D scaffolds and showed specific enriched proteins in cirrhotic ECM in comparison to healthy ECM proteins. Cell repopulation of cirrhotic scaffolds highlighted a unique up-regulation in genes related to epithelial to mesenchymal transition (EMT) and TGFβ signaling. This was also supported by the presence and release of higher concentration of endogenous TGFβ1 in cirrhotic scaffolds in comparison to healthy scaffolds. Fibronectin secretion was significantly upregulated in cells grown in cirrhotic scaffolds in comparison to cells engrafted in healthy scaffolds. TGFβ1 induced the phosphorylation of canonical proteins Smad2/3, which was ECM scaffold-dependent. Important, TGFβ1-induced phosphorylation of Smad2/3 was significantly reduced and ECM scaffold-independent when pre/simultaneously treated with the TGFβ-R1 kinase inhibitor Galunisertib. In conclusion, the inherent features of cirrhotic human liver ECM micro-environment were dissected and characterized for the first time as key pro-carcinogenic components in HCC development.