Abstract：
:SerpinB3 has been recently described as an early marker of liver carcinogenesis, but the potential mechanistic role of this serpin in tumor development is still poorly understood. Overexpression of Myc often correlates with more aggressive tumour forms, supporting its involvement in carcinogenesis. Yes-associated protein (Yap), the main effector of the Hippo pathway, is a central regulator of proliferation and it has been found up-regulated in hepatocellular carcinomas. The study has been designed to investigate and characterize the interplay and functional modulation of Myc by SerpinB3 in liver cancer. Results from this study indicate that Myc was up-regulated by SerpinB3 through calpain and Hippo-dependent molecular mechanisms in transgenic mice and hepatoma cells overexpressing human SerpinB3, and also in human hepatocellular carcinomas. Human recombinant SerpinB3 was capable to inhibit the activity of Calpain in vitro, likely reducing its ability to cleave Myc in its non oncogenic Myc-nick cytoplasmic form. SerpinB3 indirectly increased the transcription of Myc through the induction of Yap pathway. These findings provide for the first time evidence that SerpinB3 can improve the production of Myc through direct and indirect mechanisms that include the inhibition of generation of its cytoplasmic form and the activation of Yap pathway.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Turato C,Cannito S,Simonato D,Villano G,Morello E,Terrin L,Quarta S,Biasiolo A,Ruvoletto M,Martini A,Fasolato S,Zanus G,Cillo U,Gatta A,Parola M,Pontisso Pdoi
10.1038/srep17701subject
Has Abstractpub_date
2015-12-04 00:00:00pages
17701issn
2045-2322pii
srep17701journal_volume
5pub_type
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