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Updated: Aug 6, 2026
Ultrasound-Guided Orthotopic Implantation of Murine Pancreatic Ductal Adenocarcinoma
Published on: November 19, 2019
Ductal pancreatic cancer in humans and mice
1Department of Medicine, Abramson Family Cancer Research Institute, Abramson Cancer Center at the University of Pennsylvania, Philadelphia, 19104, USA.
Abstract:
Pancreatic ductal adenocarcinoma (PDA) eludes early detection and resists current therapies, earning its distinction as the most lethal malignancy by organ site in the western world. This dire reality prompted extensive yet generally disappointing efforts to generate transgenic mouse models of this malignancy. Recently, mutant mice that develop pancreatic intraepithelial neoplasms (PanIN), the presumed preinvasive stage of PDA, were produced by conditionally expressing an endogenous oncogenic Kras allele in the developing murine pancreas. Mice with PanIN demonstrated promise in the pursuit of biomarkers of early pancreatic cancer, and, importantly, such mice eventually developed and succumbed to PDA after a long latency, establishing PanINs as true precursors to the invasive disease. Furthermore, the incorporation of conditional mutations in tumor suppressor alleles known to be altered in human PDA synergized with oncogenic Kras to produce advanced PDA with a short latency, recapitulating central pathophysiological events in human PDA. These models facilitate a variety of biological and clinical investigations such as explorations of the cellular origins of PDA and the development of treatment strategies for advanced PanIN and PDA. In addition, lessons from modeling PDA may be applicable to other tumor types and illuminate general principles of carcinogenesis.
Insights
Developing new mouse models for pancreatic cancer (PDA) has been challenging. These models now show promise for understanding early detection and developing therapies for this lethal malignancy.
Area of Science:
- Oncology
- Genetics
- Cancer Biology
Background:
- Pancreatic ductal adenocarcinoma (PDA) is a highly lethal cancer with poor early detection and treatment outcomes.
- Existing transgenic mouse models have had limited success in recapitulating PDA's complexity.
- Pancreatic intraepithelial neoplasms (PanIN) are recognized as preinvasive lesions preceding PDA.
Purpose of the Study:
- To generate and validate advanced transgenic mouse models for pancreatic ductal adenocarcinoma (PDA).
- To investigate the role of oncogenic Kras and tumor suppressor mutations in PDA development.
- To establish reliable models for exploring early detection biomarkers and therapeutic strategies for PDA.
Main Methods:
- Conditional expression of oncogenic Kras in the developing murine pancreas to induce PanIN.
- Introduction of conditional tumor suppressor mutations alongside oncogenic Kras.
- Longitudinal observation of tumor development, latency, and progression in mouse models.
Main Results:
- Mutant mice successfully developed PanINs, serving as precursors to invasive PDA.
- Combined oncogenic Kras and tumor suppressor mutations accelerated PDA development, mimicking human disease.
- These models provide a platform for studying PDA's cellular origins and pathophysiology.
Conclusions:
- Novel transgenic mouse models accurately recapitulate key events in human pancreatic cancer development.
- These models are crucial for advancing the discovery of early detection biomarkers and novel therapeutic interventions for PDA.
- Insights gained from PDA modeling may offer broader applications in understanding carcinogenesis across tumor types.
