Maternal selenium levels and sudden infant death syndrome (SIDS)

Area of Science:

• Nutritional Biochemistry
• Pediatric Health
• Public Health

Background:

• Investigating the potential link between low antioxidant status, specifically selenium (Se), and Sudden Infant Death Syndrome (SIDS).
• Assessing the role of Se and glutathione peroxidase (GPx) as potential predisposing factors for SIDS.

Purpose of the Study:

• To evaluate Se status in pregnant women, non-pregnant women, and newborn infants in Tasmania.
• To determine if blood Se levels at birth differ significantly in infants who later died of SIDS (cot death).

Main Methods:

• Blood samples collected from pregnant mothers and umbilical cords of newborns in Tasmania.
• Analysis of blood samples for Se and GPx content.
• Comparison of Se and GPx levels with non-pregnant blood donors across different Australian regions and seasons.

Main Results:

• No significant difference in cord blood Se or GPx levels was observed between infants who died of cot death and control infants in this study.
• No seasonal variation in Se or GPx levels was detected among pregnant Tasmanian mothers.
• Tasmanian blood donors exhibited significantly lower Se and GPx levels compared to donors from other Australian states.
• A decrease in GPx levels was observed in mothers during pregnancy.

Conclusions:

• The study found no direct evidence linking Se or GPx status to SIDS in the observed sample.
• Tasmanian populations demonstrate lower baseline levels of Se and GPx, indicating a potential public health concern for antioxidant status.