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Collet L, Ghurburrun E, Meyers N, Assi M, Pirlot B, Leclercq IA, Couvelard A, Komuta M, Cros J, Demetter P, Lemaigre FP, Borbath I, Jacquemin P. Kras and Lkb1 mutations synergistically induce intraductal papillary mucinous neoplasm derived from pancreatic duct cells. Gut 2020; 69:704-714. [PMID: 31154393 DOI: 10.1136/gutjnl-2018-318059] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 05/15/2019] [Accepted: 05/15/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Pancreatic cancer can arise from precursor lesions called intraductal papillary mucinous neoplasms (IPMN), which are characterised by cysts containing papillae and mucus-producing cells. The high frequency of KRAS mutations in IPMN and histological analyses suggest that oncogenic KRAS drives IPMN development from pancreatic duct cells. However, induction of Kras mutation in ductal cells is not sufficient to generate IPMN, and formal proof of a ductal origin of IPMN is still missing. Here we explore whether combining oncogenic KrasG12D mutation with an additional gene mutation known to occur in human IPMN can induce IPMN from pancreatic duct cells. DESIGN We created and phenotyped mouse models in which mutations in Kras and in the tumour suppressor gene liver kinase B1 (Lkb1/Stk11) are conditionally induced in pancreatic ducts using Cre-mediated gene recombination. We also tested the effect of β-catenin inhibition during formation of the lesions. RESULTS Activating KrasG12D mutation and Lkb1 inactivation synergised to induce IPMN, mainly of gastric type and with malignant potential. The mouse lesions shared several features with human IPMN. Time course analysis suggested that IPMN developed from intraductal papillae and glandular neoplasms, which both derived from the epithelium lining large pancreatic ducts. β-catenin was required for the development of glandular neoplasms and subsequent development of the mucinous cells in IPMN. Instead, the lack of β-catenin did not impede formation of intraductal papillae and their progression to papillary lesions in IPMN. CONCLUSION Our work demonstrates that IPMN can result from synergy between KrasG12D mutation and inactivation of a tumour suppressor gene. The ductal epithelium can give rise to glandular neoplasms and papillary lesions, which probably both contribute to IPMN formation.
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Affiliation(s)
- Louis Collet
- Université catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Elsa Ghurburrun
- Université catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Nora Meyers
- Université catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Mohamad Assi
- Université catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Boris Pirlot
- Université catholique de Louvain, IREC, Brussels, Belgium
| | | | - Anne Couvelard
- Université Paris Diderot, U1149, Paris, France.,Hôpital Bichat, Department of Pathology, AP-HP, DHU UNITY, Paris, France
| | - Mina Komuta
- Université catholique de Louvain, Cliniques universitaires Saint- Luc, Department of Pathology, Brussels, Belgium
| | - Jérôme Cros
- Hôpital Beaujon, Department of Pathology, INSERM U1149, Paris, France
| | - Pieter Demetter
- Université libre de Bruxelles, Erasme University Hospital, Department of Pathology, Brussels, Belgium
| | | | - Ivan Borbath
- Université catholique de Louvain, IREC, Brussels, Belgium.,Université catholique de Louvain, Cliniques universitaires Saint-Luc, Brussels, Belgium
| | - Patrick Jacquemin
- Université catholique de Louvain, de Duve Institute, Brussels, Belgium
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Ghurburrun E, Borbath I, Lemaigre FP, Jacquemin P. Liver and Pancreas: Do Similar Embryonic Development and Tissue Organization Lead to Similar Mechanisms of Tumorigenesis? Gene Expr 2018; 18:149-155. [PMID: 29580319 PMCID: PMC6190115 DOI: 10.3727/105221618x15216414278706] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The liver and pancreas are closely associated organs that share a common embryological origin. They display amphicrine properties and have similar exocrine organization with parenchymal cells, namely, hepatocytes and acinar cells, secreting bile and pancreatic juice into the duodenum via a converging network of bile ducts and pancreatic ducts. Here we compare and highlight the similarities of molecular mechanisms leading to liver and pancreatic cancer development. We suggest that unraveling tumor development in an organ may provide insight into our understanding of carcinogenesis in the other organ.
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Affiliation(s)
- Elsa Ghurburrun
- *Université catholique de Louvain, de Duve Institute, Brussels, Belgium
| | - Ivan Borbath
- †Université catholique de Louvain, Department of Hepato-Gastro-Enterology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | | | - Patrick Jacquemin
- *Université catholique de Louvain, de Duve Institute, Brussels, Belgium
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Mauroy A, Taminiau B, Nezer C, Ghurburrun E, Baurain D, Daube G, Thiry E. High-throughput sequencing analysis reveals the genetic diversity of different regions of the murine norovirus genome during in vitro replication. Arch Virol 2016; 162:1019-1023. [PMID: 27942973 DOI: 10.1007/s00705-016-3179-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 11/16/2016] [Indexed: 01/27/2023]
Abstract
In this study, we report the genetic diversity and nucleotide mutation rates of five representative regions of the murine norovirus genome during in vitro passages. The mutation rates were similar in genomic regions encompassing partial coding sequences for non-structural (NS) 1-2, NS5, NS6, NS7 proteins within open reading frame (ORF) 1. In a region encoding a portion of the major capsid protein (VP1) within ORF2 (also including the ORF4 region) and a portion of the minor structural protein (VP2), the mutation rates were estimated to be at least one order of magnitude higher. The VP2 coding region was found to have the highest mutation rate.
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Affiliation(s)
- Axel Mauroy
- Veterinary Virology and Animal Viral Diseases, Fundamental and Applied Research for Animal & Health Centre, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.
| | - Bernard Taminiau
- Food Microbiology, Fundamental and Applied Research for Animal & Health Centre, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | | | - Elsa Ghurburrun
- Veterinary Virology and Animal Viral Diseases, Fundamental and Applied Research for Animal & Health Centre, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Denis Baurain
- Eukaryotic Phylogenomics, Department of Life Sciences, University of Liège, Liège, Belgium
| | - Georges Daube
- Food Microbiology, Fundamental and Applied Research for Animal & Health Centre, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Etienne Thiry
- Veterinary Virology and Animal Viral Diseases, Fundamental and Applied Research for Animal & Health Centre, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
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