Stability of Oncoproteins After Tumor Resection
Author Information
Author(s): G. Ong, W. Gullick, K. Sikora
Primary Institution: ICRF Oncology Group, Hammersmith Hospital
Hypothesis
How do oncogene encoded proteins decay after the collection and storage of human tumor biopsies?
Conclusion
Oncogene products decay at different rates after tumor resection, which should be considered for accurate protein expression measurements.
Supporting Evidence
- EGF-receptor and neu proteins remained stable for up to 24 hours after tumor resection.
- c-myc protein was found to degrade significantly after 20 minutes.
- Variations in protein stability highlight the need for standardized biopsy collection methods.
Takeaway
When doctors take out tumors, some proteins break down quickly, while others stay stable for longer. This matters for testing how much of these proteins are in the tumor.
Methodology
The study examined the decay rates of c-myc, neu, and EGF-receptor proteins in tumor segments stored in phosphate buffered saline at room temperature for varying time intervals.
Limitations
The study does not account for variations in autolysis rates between different tissues or other factors affecting protein degradation.
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