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Cord blood leptin concentrations in relation to intrauterine growth
A Varvarigou1, C S Mantzoros, N G Beratis
1Department of Paediatrics, University of Patras Medical School, General University Hospital, Greece.
Insights
Cord blood leptin levels are linked to how well a baby grows in the womb. Lower leptin in newborns may indicate smaller size for gestational age, suggesting a role for leptin in fetal growth regulation.
Area of Science:
- Endocrinology
- Neonatal Physiology
- Human Growth and Development
Background:
- Leptin, a key hormone signaling energy stores, influences hypothalamic pituitary axes, including growth hormone regulation.
- Understanding leptin's role in fetal development is crucial for assessing intrauterine growth and neonatal health.
Purpose of the Study:
- To investigate the association between cord blood leptin concentrations and intrauterine growth status in newborns.
- To compare leptin levels across neonates categorized as small for gestational age (SGA), appropriate for gestational age (AGA), and large for gestational age (LGA).
Main Methods:
- Cord blood leptin concentrations were measured in 25 SGA, 100 AGA, and 45 LGA healthy neonates.
- Statistical analyses were performed to assess correlations with ponderal index, cord blood insulin, placental weight, and maternal serum leptin.
Main Results:
- Leptin was detectable in all newborns, with concentrations comparable to adult levels.
- SGA newborns exhibited significantly lower cord blood leptin concentrations compared to AGA and LGA newborns (P < 0.01).
- Cord blood leptin levels showed significant associations with ponderal index, cord insulin, placental weight, and maternal leptin, independent of other factors.
Conclusions:
- Cord blood leptin concentrations are independently associated with intrauterine growth status.
- Leptin may play a significant role in regulating fetal growth and appetite control in newborns.
- Further research is warranted to elucidate the precise mechanisms underlying leptin's influence on neonatal development.
Objective:
Leptin, a hormone that signals the amount of energy stores to the brain, has recently been shown to play a role in the regulation of several hypothalamic pituitary axes, including the growth hormone axis. To investigate a potential association between cord blood leptin concentrations and intrauterine growth we measured leptin concentrations in the cord blood of small for gestational age (SGA), appropriate for gestational age (AGA) and large for gestational age (LGA) healthy newborns.
Patients And Measurements:
Cord blood leptin concentrations were evaluated in 25 SGA, 100 AGA, and 45 LGA, neonates.
Results:
Leptin was detectable in all newborns in concentrations comparable with those found in adults. Moreover, SGA newborns had lower leptin concentrations (3.70 +/- 1.81 micrograms/l) than AGA (5.65 +/- 4.98 micrograms/l) and LGA newborns (11.99 +/- 7.06 micrograms/ l)(P < 0.01). Cord blood leptin concentrations were significantly associated with ponderal index, cord blood insulin concentrations, placental weight and maternal serum leptin concentrations. Importantly, the association between cord blood leptin concentrations and intrauterine growth status persisted after adjusting for adiposity, placental weight, maternal serum leptin concentrations and cord blood insulin concentrations.
Conclusions:
Cord blood leptin concentrations are independently associated with intrauterine growth. Future studies are needed to elucidate the underlying mechanism and clarify the role of leptin in regulating growth and controlling appetite in newborns.