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Cadmium induced limb defects in mice: strain associated differences in sensitivity.
Teratology
|April 1, 1979
Summary
Cadmium sulfate exposure during pregnancy caused fetal malformations in mice, with higher doses leading to more severe defects. Surprisingly, strains resistant to cadmium
Area of Science:
- Toxicology
- Developmental Biology
- Genetics
Background:
- Cadmium is a toxic heavy metal with known adverse effects.
- Previous research indicates cadmium can cause developmental toxicity.
Purpose of the Study:
- To investigate the teratogenic effects of cadmium sulfate (CdSO4) in mice.
- To examine the relationship between cadmium dose and malformation rates.
- To assess strain-specific sensitivity to cadmium-induced teratogenicity.
Main Methods:
- Pregnant CD-1 mice received intraperitoneal injections of cadmium sulfate on day 9 of gestation.
- Dose-response effects were evaluated using 12 or 24 mumol/kg.
- Inbred mouse strains with differing genetic resistance to cadmium-induced testicular damage were used to assess teratogenic sensitivity.
Main Results:
- Cadmium exposure resulted in fetal malformations affecting limbs, face, trunk, and tail.
- A significant dose-dependent relationship was observed between cadmium exposure and malformation rates.
- Contrary to expectations, cadmium-resistant strains exhibited higher sensitivity to teratogenic effects.
Conclusions:
- Cadmium sulfate is a potent teratogen in mice, inducing dose-dependent malformations.
- Genetic factors influencing resistance to cadmium-induced testicular damage do not confer protection against teratogenicity and may even increase susceptibility.
- The observed limb malformations, particularly forelimb defects, share similarities with those induced by acetazolamide, suggesting limited developmental response pathways.