Elevated Expression of ras Oncogenes in Colorectal Tumors
Author Information
Author(s): D.A. Spandidos, I.B. Kerr
Primary Institution: The Beatson Institute for Cancer Research
Hypothesis
Does the expression of ras oncogenes vary between normal and premalignant or malignant colorectal tissues?
Conclusion
The study found that ras oncogene expression is significantly elevated in premalignant and malignant colorectal tissues compared to normal mucosa.
Supporting Evidence
- Ki-ras and Ha-ras transcripts were detected in most premalignant and malignant tissues but barely in normal tissue.
- Ki-ras RNA levels in premalignant and malignant tissues were significantly higher than in normal colorectal mucosa.
- Ha-ras expression also showed significant elevation in premalignant and malignant tissues compared to normal mucosa.
Takeaway
This study shows that certain genes related to cancer are more active in tumors and precancerous growths in the colon than in normal tissue.
Methodology
RNA transcripts from various colorectal tissues were quantified using RNA spot hybridization analysis.
Limitations
The study did not include patients with known familial syndromes.
Participant Demographics
Patients with colorectal tumors and polyps, none with familial syndromes.
Statistical Information
Statistical Significance
p<0.05
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