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Developmental abnormalities induced by 6-mercaptopurine in the hamster
Canadian Journal of Physiology and Pharmacology
|January 1, 1979
Summary
6-mercaptopurine (6MP) causes dose- and time-dependent birth defects in hamsters, including severe gross malformations and subtle tissue abnormalities. Its teratogenic effects are specific to species and tissue types.
Area of Science:
- Developmental toxicology
- Teratology
- Pharmacology
Background:
- 6-mercaptopurine (6MP) is an immunosuppressive and cytotoxic drug.
- Understanding drug-induced developmental toxicity is crucial for safety assessments.
Purpose of the Study:
- To investigate the teratogenic potential of 6-mercaptopurine (6MP) in hamsters.
- To determine the dose and time dependency of 6MP's toxic effects during gestation.
Main Methods:
- Pregnant hamsters were administered varying doses of 6MP at different gestational stages.
- Fetuses were examined for gross and histological malformations.
- Comparative analysis with other species and growth-suppressive agents was performed.
Main Results:
- 6MP exhibited dose- and time-dependent toxic and teratogenic effects.
- Severe gross malformations included cleft palate, micrognathia, agnathia, microglossia, short limbs, and gut herniation.
- Histological abnormalities were observed even in grossly normal fetuses from late gestation exposures.
- Teratogenicity was found to be species and tissue specific.
Conclusions:
- 6MP poses significant teratogenic risks in a dose- and time-dependent manner.
- Histological examination is essential for comprehensive teratological safety analysis.
- The teratogenic effects of 6MP are not uniform across species or tissues.