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Updated: Jul 6, 2026
Implantation and Monitoring by PET/CT of an Orthotopic Model of Human Pleural Mesothelioma in Athymic Mice
Published on: December 21, 2019
A conditional mouse model for malignant mesothelioma
Johan Jongsma1, Erwin van Montfort, Marc Vooijs
1Department of Molecular Genetics, Cancer Genomics Centre, Centre for Biomedical Genetics, Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands.
Abstract:
Malignant mesothelioma is a devastating disease that has been associated with loss of Neurofibromatosis type 2 (NF2) and genetic lesions affecting RB and P53 pathways. We introduced similar lesions in the mesothelial lining of the thoracic cavity of mice. Mesothelioma developed at high incidence in Nf2;Ink4a/Arf and Nf2;p53 conditional knockout mice with median survival times of approximately 30 and 20 weeks, respectively. Murine mesothelioma closely mimicked human malignant mesothelioma. Conditional Nf2;Ink4a/Arf mice showed increased pleural invasion compared to conditional Nf2;p53 mice. Interestingly, upon Ink4a loss in the latter mice median survival was significantly reduced and all tumors were highly invasive, suggesting that Ink4a loss substantially contributes to the poor clinical outcome of malignant mesothelioma.
Insights
Loss of Neurofibromatosis type 2 (NF2) and RB/P53 pathway genetic lesions contribute to malignant mesothelioma. Ink4a loss significantly worsens outcomes in mouse models, highlighting its role in this aggressive cancer.
Area of Science:
- Oncology
- Cancer Biology
- Genetics
Background:
- Malignant mesothelioma is a rare but aggressive cancer.
- Loss of Neurofibromatosis type 2 (NF2) and genetic alterations in RB and P53 pathways are implicated in its development.
- Understanding the genetic drivers is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the role of NF2, RB, and P53 pathway alterations in a murine model of malignant mesothelioma.
- To compare the impact of different genetic lesions on mesothelioma development and progression.
- To assess the contribution of Ink4a loss to tumor aggressiveness and patient survival.
Main Methods:
- Creation of conditional knockout mouse models with specific genetic lesions (Nf2;Ink4a/Arf and Nf2;p53).
- Induction of genetic alterations in the mesothelial lining of the thoracic cavity.
- Monitoring tumor development, survival rates, and invasiveness in the mouse models.
Main Results:
- Mesothelioma developed with high incidence in both Nf2;Ink4a/Arf and Nf2;p53 conditional knockout mice.
- Murine mesothelioma models closely recapitulated human malignant mesothelioma characteristics.
- Conditional Nf2;Ink4a/Arf mice exhibited increased pleural invasion compared to Nf2;p53 mice.
- Loss of Ink4a in Nf2;p53 mice significantly reduced survival and increased tumor invasiveness.
Conclusions:
- NF2 loss, combined with RB/P53 pathway inactivation, can induce malignant mesothelioma in mice.
- Ink4a loss plays a critical role in promoting mesothelioma aggressiveness and poor clinical outcomes.
- These findings provide valuable insights into mesothelioma pathogenesis and potential therapeutic targets.
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