Impact of Maternal Undernutrition on Placental Development in Rats
Author Information
Author(s): Belkacemi Louiza, Jelks Andrea, Chen Chun-Hung, Ross Michael G, Desai Mina
Primary Institution: Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center
Hypothesis
50% maternal undernutrition (MUN) associates with increased maternal glucocorticoid levels and decreased placental HSD11B.
Conclusion
Maternal undernutrition leads to increased maternal glucocorticoids and reduced placental growth, which may contribute to fetal growth restriction.
Supporting Evidence
- MUN dams displayed significantly increased plasma corticosterone levels compared to control dams.
- A reduction in fetal and placental weights was observed in both mid-horn and proximal-horn positions.
- The placental labyrinth zone showed decreased expression of HSD11B1-2 in both horns.
- Reduced placental GC catabolic capacity was accompanied by downregulation of nutrient transporter expression.
Takeaway
When pregnant rats don't get enough food, it can hurt the growth of their babies and the placenta that feeds them.
Methodology
The study involved measuring maternal serum corticosterone levels and evaluating placental expression of glucocorticoid receptors and nutrient transporters in control and MUN rats.
Potential Biases
Potential bias in the selection of animal models and dietary interventions.
Limitations
The study was limited to a specific animal model and may not fully translate to human pregnancies.
Participant Demographics
First-time pregnant Sprague Dawley rats, aged eight weeks.
Statistical Information
P-Value
p<0.01 for maternal corticosterone levels comparison
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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