The Study
A point mutation is responsible for the acquisition of transforming properties by the T24 human bladder carcinoma oncogene
This study found that one tiny change in a gene inside a lab-grown cancer cell made the cell act more aggressively. It doesn't prove that this change causes cancer in people — it just shows it happened together in this one cell. Think of it like noticing your shoes are muddy when you come inside — it doesn't prove the mud made you come in.
Analysis score
Maximum 58 for a case-control study.
Where the score came from
A single letter mistake in the gene's instruction manual changes one building block in a protein, making it turn healthy cells into cancer cells.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 527 / 100
Quality score
Researchers compare people who have a condition (cases) with similar people who do not (controls), looking back in time for differences in exposure. Useful but more prone to bias.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — this tiny change alone is enough to make a normal protein become a cancer-causing one, showing how small genetic errors can have huge effects.
- 2One letter change (G to T) in DNA causes one amino acid (glycine to valine) to be swapped in the p21 protein.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Nature
Year
1982
Authors
E. Reddy, R. K. Reynolds, E. Santos, M. Barbacid
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Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.