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Mammary tumors induced by polyomavirus
1Department of Microbiology, Michigan State University, East Lansing, USA.
Abstract:
The first known member of the Polyomavirus family, murine Polyomavirus (MPyV), was discovered because of its oncogenic properties. The genetic simplicity of MPyV (shared with all members of the Py family), the wide spectrum of tumors induced by MPyV, and the convenient properties of its natural host, the mouse, make it a particularly interesting model system to study oncogenesis. This paper briefly reviews the virus infectious cycle and our current understanding of the viral proteins that are involved in oncogenesis, and focuses on recent studies on oncogenesis of the mammary gland. Mammary gland ductal adenocarcinomas develop at high frequency and with short latency in infected immunoincompetent adult female or normal neonatal mice or in transgenic mice expressing the viral oncogene, middle T. These tumors provide excellent model systems for the study of human breast cancer.
Insights
Murine polyomavirus (MPyV) is a valuable model for studying cancer due to its oncogenic properties and the mouse host. Research focuses on MPyV
Area of Science:
- Virology
- Oncology
- Molecular Biology
Background:
- Murine polyomavirus (MPyV), the first identified Polyomavirus, exhibits oncogenic properties.
- MPyV's genetic simplicity and ability to induce diverse tumors in mice make it a key model for oncogenesis research.
Purpose of the Study:
- To review the MPyV infectious cycle and viral oncogenesis mechanisms.
- To highlight recent findings on mammary gland oncogenesis induced by MPyV.
- To emphasize the utility of MPyV-induced mammary tumors as models for human breast cancer.
Main Methods:
- Review of existing literature on MPyV infectious cycle and oncogenesis.
- Analysis of studies detailing viral protein involvement in tumor development.
- Examination of experimental models including immunoincompetent and neonatal mice, and transgenic mice expressing the middle T oncogene.
Main Results:
- MPyV infection leads to high-frequency, short-latency ductal adenocarcinomas in the mammary glands of susceptible mice.
- Transgenic mice expressing the viral middle T oncogene also develop mammary tumors.
- These MPyV-induced tumors closely mimic human breast cancer.
Conclusions:
- MPyV serves as an excellent model system for investigating the molecular mechanisms of oncogenesis.
- The study of MPyV-induced mammary tumors offers significant insights into human breast cancer progression.
- Understanding MPyV's role in oncogenesis can inform future cancer research and therapeutic strategies.