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Effects of oral aluminum administration on perinatal and postnatal development in rats
J L Domingo1, J L Paternain, J M Llobet
1Laboratory of Toxicology and Biochemistry, Faculty of Medicine, University of Barcelona, Reus, Spain.
Insights
High aluminum nitrate doses during pregnancy significantly reduced offspring growth in rats. Even lower doses, similar to medical treatments, showed some effects, suggesting caution with aluminum ingestion during gestation.
Area of Science:
- Toxicology
- Developmental Biology
- Reproductive Science
Background:
- Aluminum exposure is a concern due to its potential health effects.
- Limited data exists on the specific impact of aluminum nitrate on prenatal and postnatal development.
Purpose of the Study:
- To investigate the effects of aluminum nitrate administration during gestation and lactation on Sprague-Dawley rat offspring growth.
- To determine dose-dependent toxicity and identify potential risks associated with aluminum exposure during critical developmental periods.
Main Methods:
- Pregnant Sprague-Dawley rats were administered aluminum nitrate via gavage from day 14 of gestation to day 21 of lactation.
- Doses administered were 0, 180, 360, and 720 mg/kg/day.
- Offspring growth was monitored from birth through lactation.
Main Results:
- No overt fetotoxic effects were observed at the tested doses.
- Significant reduction in offspring growth was noted from birth through lactation at higher aluminum nitrate doses (360 and 720 mg/kg/day).
- Minimal toxic effects were seen at 180 mg/kg/day, a level comparable to human medical intake.
Conclusions:
- High-dose aluminum nitrate exposure during gestation and lactation negatively impacts offspring growth.
- Even moderate exposure levels warrant caution, as they approach amounts used in human medical treatments.
- Ingestion of high aluminum amounts should be avoided during pregnancy and lactation due to potential developmental risks.
Abstract:
Aluminum nitrate was administered by gavage to four groups of pregnant Sprague-Dawley rats from the 14th day of gestation through 21 days of lactation at doses of 0, 180, 360 and 720 mg/kg/day. These doses did not produce overt fetotoxic effects. However, the growth of the offspring was significantly less from birth and during all the period of lactation for the higher doses of aluminum nitrate. Although very few toxic effects could be observed for the 180 mg/kg/day group (or 13 mg Al/kg/day), this quantity is similar to the amounts ingested by some people in special medical treatment (10 mg Al/kg/day). Therefore, it would seem that high amounts of aluminum should not be ingested during the periods of gestation.