Loss of Pten and activation of kras synergistically induce formation of intraductal papillary mucinous neoplasia from pancreatic ductal cells in mice
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Background & aims Intraductal papillary mucinous neoplasias (IPMNs) are precancerous cystic lesions that can develop into pancreatic ductal adenocarcinomas (PDACs). These large macroscopic lesions are frequently detected during medical imaging, but it is unclear how they form or progress to PDAC. We aimed to identify cells that form IPMNs and mutations that promote IPMN development and progression.Methods We generated mice with disruption of Pten specifically in ductal cells (Sox9CreER T2;Pten flox/flox;R26R YFP or Pten ΔDuct/ΔDuct mice) and used Pten ΔDuct/+ and Pten+/+ mice as controls. We also generated Kras G12D;Pten ΔDuct/ΔDuct and Kras G12D;Pten ΔDuct/+ mice. Pancreata were collected when mice were 28 weeks to 14.5 months old and analyzed by histology, immunohistochemistry, and electron microscopy. We performed multiplexed droplet digital polymerase chain reaction to detect spontaneous Kras mutations in Pten ΔDuct/ΔDuct mice and study the effects of Ras pathway activation on initiation and progression of IPMNs. We obtained 2 pancreatic sections from a patient with an invasive pancreatobiliary IPMN and analyzed the regions with and without the invasive IPMN (control tissue) by immunohistochemistry.Results Mice with ductal cell-specific disruption of Pten but not control mice developed sporadic, macroscopic, intraductal papillary lesions with histologic and molecular features of human IPMNs. Pten ΔDuct/ΔDuct mice developed IPMNs of several subtypes. In Pten ΔDuct/ΔDuct mice, 31.5% of IPMNs became invasive; invasion was associated with spontaneous mutations in Kras. Kras G12D;Pten ΔDuct/ΔDuct mice all developed invasive IPMNs within 1 month. In Kras G12D;Pten ΔDuct/+ mice, 70% developed IPMN, predominately of the pancreatobiliary subtype, and 63.3% developed PDAC. In all models, IPMNs and PDAC expressed the duct-specific lineage tracing marker yellow fluorescent protein. In immunohistochemical analyses, we found that the invasive human pancreatobiliary IPMN tissue had lower levels of PTEN and increased levels of phosphorylated (activated) ERK compared with healthy pancreatic tissue.Conclusions In analyses of mice with ductal cell-specific disruption of Pten, with or without activated Kras, we found evidence for a ductal cell origin of IPMNs. We also showed that PTEN loss and activated Kras have synergistic effects in promoting development of IPMN and progression to PDAC.
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Combining oncogenic KRAS expression in the adult ductal lineage with Pten loss leads to IPMN formation in mice.
“Combining oncogenic KRAS expression in the adult-ductal lineage with Pten loss leads to the formation of IPMNs124”
From Pancreatic cancer: Advances and challenges (2023) · cites this paper as [124]
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- Authors
- Kopp, J. L., Dubois, C. L., Schaeffer, D. F., Samani, A., Taghizadeh, F., Cowan, R. W., Rhim, A. D., Stiles, B. L., Valasek, M., & Sander, M.
- Affiliations
- University of British Columbia (CA)
- University of California San Diego (US)
- The University of Texas MD Anderson Cancer Center (US)
- University of Southern California (US)
- Corresponding author
- Sander, Maike
- ORCID
- Venue
- Gastroenterology
- Publisher
- Elsevier BV
- Published
- 2018-04
- Volume
- 154
- Issue
- 5
- Pages
- 1509-1523.e5
- ISSN
- 0016-5085 (ISSN-L)
- PMC
- PMC5880733
- OpenAlex
- W2779623685
- Cited by
- 80
- References
- 32
- Citations by year
- 2026: 2 · 2025: 6 · 2024: 8 · 2023: 9 · 2022: 6 · 2021: 17 · 2020: 12 · 2019: 13 · 2018: 7
- FWCI
- 3.86
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Gastroenterology (acceptedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- MDC Repository (Max-Delbrueck-Center for Molecular Medicine) (submittedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- Funders
- National Institutes of Health (R01DK078803, R21CA194839)
- Topics
- Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
- Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
- Keywords
- intraductal papillary mucinous neoplasm, pancreatic ductal adenocarcinoma, PTEN, KRAS G12D, pancreatic ductal cells, pancreatic cysts, tumor progression, pancreatic cancer initiation, pancreatic intraepithelial neoplasia, RAS pathway activation
- MeSH terms
- Animals, Cell Movement, Cell Transformation, Neoplastic, Humans, Mice, Inbred C57BL, Mutation, Neoplasm Invasiveness, Pancreatic Ducts, Pancreatic Neoplasms, Phenotype, Time Factors, Signal Transduction, Gene Expression Regulation, Enzymologic, Gene Expression Regulation, Neoplastic, Proto-Oncogene Proteins p21(ras), Neoplasms, Cystic, Mucinous, and Serous, Mice, Knockout, Disease Progression, Cell Lineage, Genetic Predisposition to Disease, Carcinoma, Pancreatic Ductal, Cell Proliferation, PTEN Phosphohydrolase
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