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Changes in oncogene expression in ascite tumour cells during ageing.
M Biagetti1, M A Della Fazia, G Servillo
1Institute of General Pathology, University of Perugia, Italy.
Cell Proliferation
|April 1, 1994
Summary
This study investigated the expression of c-myc and c-fos oncogenes in tumor cells. C-myc correlates with cell proliferation, while c-fos is found in non-cycling cells.
Area of Science:
- Molecular biology
- Cancer research
- Cell cycle analysis
Background:
- Oncogenes like c-myc and c-fos play critical roles in cell growth and cancer development.
- Understanding their expression patterns in tumors is crucial for targeted therapies.
Purpose of the Study:
- To investigate the temporal expression of c-myc and c-fos oncogenes in an ascitic tumor model (ATPC+).
- To correlate oncogene expression with cell cycle phases in tumor cells.
Main Methods:
- Analysis of specific mRNA synthesis using Northern blot.
- Detection of oncogene proteins via immunofluorescence and flow cytometry.
- Assessment of cell distribution across different cell cycle phases (G1, S, G2).
Main Results:
- Both c-myc and c-fos oncogenes are expressed in ATPC+ tumor cells.
- c-myc expression was observed at 5, 8, and 12 days post-implantation, with protein predominantly in S or S+G2 phase cells.
- c-fos expression was detected only at 12 days post-implantation, with protein mainly in G1 phase cells.
Conclusions:
- c-myc expression is primarily associated with the proliferative activity of tumor cells.
- c-fos expression is linked to non-cycling tumor cells, suggesting distinct roles in tumor progression.