Role of the ductal transcription factors HNF6 and Sox9 in pancreatic acinar-to-ductal metaplasia

Pierre Paul Prévot, Alexandru Simion, Adrien Grimont, Marta Colletti, Abed Khalaileh, Geráldine Van Den Steen, Christine Sempoux, Xiaobo Xu, Véronique Roelants, Jacob Hald, Luc Bertrand, Harry Heimberg, Stephen F. Konieczny, Yuval Dor, Frédéric P. Lemaigre, Patrick Jacquemin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

Objective: Growing evidence suggests that a phenotypic switch converting pancreatic acinar cells to duct-like cells can lead to pancreatic intraepithelial neoplasia and eventually to invasive pancreatic ductal adenocarcinoma. Histologically, the onset of this switch is characterised by the co-expression of acinar and ductal markers in acini, a lesion called acinar-to-ductal metaplasia (ADM). The transcriptional regulators required to initiate ADM are unknown, but need to be identified to characterise the regulatory networks that drive ADM. In this study, the role of the ductal transcription factors hepatocyte nuclear factor 6 (HNF6, also known as Onecut1) and SRY-related HMG box factor 9 (Sox9) in ADM was investigated. Design: Expression of HNF6 and Sox9 was measured by immunostaining in normal and diseased human pancreas. The function of the factors was tested in cultured cells and in mouse models of ADM by a combination of gain and loss of function experiments. Results: Expression of HNF6 and Sox9 was ectopically induced in acinar cells in human ADM as well as in mouse models of ADM. HNF6 and, to a lesser extent, Sox9 were required for repression of acinar genes, for modulation of ADM-associated changes in cell polarity and for activation of ductal genes in metaplastic acinar cells. Conclusions: HNF6 and Sox9 are new biomarkers of ADM and constitute candidate targets for preventive treatment in cases when ADM may lead to cancer. This work also shows that ectopic activation of transcription factors may underlie metaplastic processes occurring in other organs.

Original languageAmerican English
Pages (from-to)1723-1732
Number of pages10
JournalGut
Volume61
Issue number12
DOIs
StatePublished - Dec 2012

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