Carcinogenicity and Hemoglobin Synthesis Induction by Cytidine Analogues
Author Information
Author(s): B.I. Carr, S. Rahbar, Y. Asmeron, A. Riggs, C.D. Winberg
Primary Institution: City of Hope National Medical Center and Beckman Research Institute of the City of Hope
Hypothesis
We investigated the carcinogenicity and effects on hemoglobin synthesis of 5-azacytidine and its analogues.
Conclusion
5-Azacytidine is a complete carcinogen that increases the incidence of testicular and non-testicular tumors in rats, while other analogues did not show significant carcinogenicity.
Supporting Evidence
- 5-Azacytidine was found to be a complete carcinogen in male Fischer rats.
- 18% of rats treated with the highest dose of 5-azacytidine developed non-testicular tumors.
- None of the other tested analogues appeared to be carcinogenic.
- 5-Azacytidine induced transplacental carcinogenesis when administered to pregnant rats.
- 5-Azacytidine was the most potent cytotoxic agent among the tested analogues.
Takeaway
This study found that a drug called 5-azacytidine can cause cancer in rats, but other similar drugs did not seem to do the same.
Methodology
Male F344 rats were injected with varying doses of 5-azacytidine and its analogues, and their health and tumor development were monitored over 12 months.
Limitations
The sample size for some analogues was small, limiting the ability to draw definitive conclusions about their carcinogenicity.
Participant Demographics
Male Fischer rats were used in the study.
Statistical Information
P-Value
<0.01
Statistical Significance
p<0.01
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