Rut Espinosa-Sotelo, Noel P Fusté, Irene Peñuelas-Haro, Ania Alay, Gabriel Pons, Xènia Almodóvar, Júlia Albaladejo, Ismael Sánchez-Vera, Ricard Bonilla-Amadeo, Francesco Dituri, Grazia Serino, Emilio Ramos, Teresa Serrano, Mariona Calvo, María Luz Martínez-Chantar, Gianluigi Giannelli, Esther Bertran, Isabel Fabregat
The NADPH oxidase NOX4 has been proposed as necessary for the apoptosis induced by the Transforming Growth Factor-beta (TGF-β) in hepatocytes and hepatocellular carcinoma (HCC) cells. However, whether NOX4 is required for TGF-β-induced canonical (SMADs) or non-canonical signals is not fully understood yet, neither its potential involvement in other parallel actions induced by TGF-β. In this work we have used CRISPR Cas9 technology to stable attenuate NOX4 expression in HCC cells. Results have indicated that NOX4 is required for an efficient SMAD2/3 phosphorylation in response to TGF-β, whereas non-canonical signals, such as the phosphorylation of the Epidermal Growth Receptor or AKT, are higher in NOX4 silenced cells...
July 13, 2023: Redox Biology