Related Experiment Videos
Splenic variations affecting sarcomagenesis among mice of an inbred strain
Abstract:
Among overtly identical mice of an inbred strain, some are relatively susceptible and some relatively resistant to sarcomagenesis by large concentrations of 3-methylcholanthrene (MCA) (Prehn, 1975 a). Spleen cells from mice, subsequently shown to be relatively susceptible, conveyed a relative resistance to oncogenesis when transferred to irradiated recipients; spleen cells from mice, subsequently shown to be relatively resistant, conveyed to secondary hosts a relative susceptibility.
Insights
Inbred mice show varying susceptibility to 3-methylcholanthrene (MCA) induced sarcomagenesis. Spleen cell transfers revealed that susceptible mice confer resistance, while resistant mice confer susceptibility to cancer development.
Area of Science:
- Immunology
- Oncology
- Genetics
Background:
- Inbred mice strains exhibit variability in susceptibility to chemical carcinogens like 3-methylcholanthrene (MCA).
- Previous research indicated differing responses to sarcomagenesis among genetically identical individuals.
Purpose of the Study:
- To investigate the role of spleen cells in mediating differential susceptibility to 3-methylcholanthrene-induced sarcomagenesis.
- To determine if cellular components from resistant or susceptible mice can alter oncogenesis in recipient hosts.
Main Methods:
- Utilizing inbred mice strains exposed to high concentrations of 3-methylcholanthrene (MCA).
- Employing spleen cell transfer experiments to irradiated recipient mice.
- Assessing oncogenesis and tumor development in secondary hosts.
Main Results:
- Spleen cells from mice initially susceptible to MCA sarcomagenesis conferred relative resistance to oncogenesis in irradiated recipients.
- Conversely, spleen cells from mice initially resistant to MCA conferred relative susceptibility to oncogenesis in secondary hosts.
Conclusions:
- Spleen cells play a crucial role in modulating an individual's susceptibility to chemically induced cancer.
- Cellular factors, transferable via spleen cells, influence the outcome of oncogenesis, suggesting an immunological or cellular basis for differential cancer resistance.