Retraction: Spirli, C., Villani, A., Mariotti, V., Fabris, L., Fiorotto, R. and Strazzabosco, M. (2015), Posttranslational regulation of polycystin-2 protein expression as a novel mechanism of cholangiocyte reaction and repair from biliary damage. Hepatology, 62: 1828–1839. https://doi.org/10.1002/hep.28138. The above article, published online on 27 August 2015 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the corresponding author, the journal’s Editor in Chief Dr. Gregory Gores, and Wiley Periodicals LLC. The retraction has been agreed upon due to recently verified concerns regarding data authenticity rendering the conclusions uncertain. Several figures included in the article were found to have been falsified.