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Plasma prostacyclin from birth to adolescence
Insights
Plasma levels of 6-keto-prostaglandin F1 alpha (6-keto-PGF1 alpha) are higher in children than adults. These levels are also higher in term infants during the first four days of life, suggesting a role in circulation adaptation.
Area of Science:
- Neonatal physiology
- Cardiovascular adaptation
- Prostaglandin research
Background:
- Prostacyclin is a potent vasodilator and anti-platelet agent.
- 6-keto-prostaglandin F1 alpha (6-keto-PGF1 alpha) is the stable metabolite of prostacyclin.
- Understanding prostacyclin levels is crucial for neonatal circulatory health.
Purpose of the Study:
- To measure plasma 6-keto-PGF1 alpha concentrations in healthy children and adults.
- To investigate age-related differences in 6-keto-PGF1 alpha levels.
- To explore the role of 6-keto-PGF1 alpha in neonatal circulatory adaptation.
Main Methods:
- Radioimmunoassay (RIA) was used to quantify plasma 6-keto-PGF1 alpha.
- Study included 111 healthy children (1 day to 16 years) and 21 healthy adults (21 to 72 years).
- Plasma samples were collected from newborns, including umbilical cord and peripheral venous blood.
Main Results:
- Children up to 16 years had significantly higher plasma 6-keto-PGF1 alpha levels than adults.
- Term infants showed higher 6-keto-PGF1 alpha levels than preterm infants in the first 4 days of life.
- No significant differences were found between umbilical arterial and peripheral venous plasma levels in newborns.
Conclusions:
- Elevated prostacyclin levels in early life may be vital for postnatal circulatory and platelet function.
- Age-dependent changes in prostacyclin metabolism are evident from infancy through adulthood.
- Factors like birth complications do not appear to influence early-life plasma 6-keto-PGF1 alpha levels.
Abstract:
The plasma concentration of 6-keto-prostaglandin F1 alpha (6-keto-PGF1 alpha), the stable hydration product of prostacyclin, was measured by radioimmunoassay in 111 healthy children aged between 1 day and 16 years and in 21 healthy adults aged between 21 and 72 years. The 6-keto-PGF1 alpha levels in children up to age 16 years were higher than those in adults. During the first 4 days of life the plasma concentrations of 6-keto-PGF1 alpha in term infants were higher (P less than 0.05) than the respective levels in preterm infants. There was no difference between the 6-keto-PGF1 alpha levels measured simultaneously in umbilical arterial and peripheral venous plasma in 7 newborn infants. Maternal pre-eclampsia or epidural analgesia during labour, mode of delivery, birthweight, or sex of the infants were not related to the plasma 6-keto-PGF1 alpha levels on the first day of life. High levels of vasodilatory and anti-aggregatory prostacyclin during the first days of life may play a role in the postnatal adaptation of the circulation and platelet function.