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Maternally-mediated neonatal lithium-cesium interaction in the mouse
1Texas Tech University Health Sciences Center School of Medicine, Lubbock.
Physiology & Behavior
|July 1, 1989
Summary
Maternal exposure to lithium (Li) or cesium (Cs) salts affected offspring organ weights and enzymes. Combining both salts negated these toxic effects, suggesting a protective interaction.
Area of Science:
- Toxicology
- Developmental Biology
- Biochemistry
Background:
- Maternal exposure to alkali metals during critical developmental periods can impact offspring health.
- Lithium (Li) and Cesium (Cs) are alkali metals with potential toxicological effects.
Purpose of the Study:
- To investigate the effects of maternal LiCl and CsCl exposure, alone and in combination, on offspring organ weights and dehydrogenase enzyme activity.
- To explore potential interactions between Li+ and Cs+ in developing mice.
Main Methods:
- Pregnant and lactating mice were exposed to LiCl, CsCl, or a combination of both via drinking fluid.
- Offspring organ weights (brain, spleen, testis) were measured.
- Hepatic alcohol dehydrogenase and cardiac lactate dehydrogenase isoenzyme (LDH5) activities were analyzed.
Main Results:
- Maternal LiCl or CsCl exposure reduced offspring brain and testis weights, suggesting CNS and endocrine toxicity.
- Coadministration of LiCl and CsCl negated these weight reductions and spleen weight increases.
- Combined maternal exposure prevented the induction of liver alcohol dehydrogenase and heart LDH5 by individual alkali metals.
Conclusions:
- A Li+-Cs+ interaction occurs in offspring following maternal exposure during pregnancy and lactation.
- Combined exposure to LiCl and CsCl mitigates the toxic effects of individual alkali metals on offspring development and enzyme activity.
- Alkali metals are likely transferred to suckling pups, with combined exposure potentially retarding toxic effects.