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Third-trimester amniotic fluid metal levels associated with preeclampsia
E B Dawson1, D R Evans, J Nosovitch
1Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston 77555, USA.
Archives of Environmental Health
|January 14, 2000
Summary
Preeclampsia in pregnancy is linked to altered levels of essential and toxic metals. This study found significant differences in metals like lead and calcium in amniotic fluid between preeclamptic and normal pregnancies.
Area of Science:
- Obstetrics and Gynecology
- Environmental Health
- Biochemistry
Background:
- Maternal exposure to toxic metals and deficiencies in essential metals are implicated in high-risk pregnancies.
- Preeclampsia is a serious pregnancy complication characterized by high blood pressure.
Purpose of the Study:
- To investigate and compare essential and toxic metal levels in amniotic fluid and serum between preeclamptic and normal pregnancies at different gestational ages.
Main Methods:
- Analyzed levels of calcium, magnesium, zinc, selenium, copper, cadmium, and lead.
- Compared metal concentrations in amniotic fluid and serum from 29 preeclamptic and 101 normal pregnancies.
- Grouped samples by gestational age: 33-36 weeks and 37-40 weeks.
Main Results:
- Significant differences in lead, calcium, magnesium, zinc, and selenium were observed in amniotic fluid between groups at 33-36 weeks gestation.
- Significant differences in magnesium, copper, zinc, cadmium, and lead were found between groups at 37-40 weeks gestation.
- Observed changes in calcium and lead levels align with animal studies linking lead poisoning to preeclampsia-like syndromes.
Conclusions:
- Altered essential and toxic metal profiles in amniotic fluid are associated with preeclampsia.
- Lead and calcium dysregulation may play a role in the pathophysiology of preeclampsia.
- Further research into metal-related biomarkers for preeclampsia is warranted.