Fasting and postprandial serum gastrin in normal human neonates

Area of Science:

• Neonatal physiology
• Gastroenterology
• Endocrinology

Background:

• Serum gastrin levels in newborns are not well-characterized.
• Understanding gastrin's role in infant digestion is crucial for nutritional management.

Purpose of the Study:

• To measure serum gastrin levels in normal-term infants at birth and during the first 72 hours of life.
• To investigate the infant's serum gastrin response to protein-containing formulas.

Main Methods:

• Serum gastrin levels were determined in 32 normal-term infants.
• Blood samples were collected from cord blood and maternal blood at birth.
• Fasting and postprandial serum gastrin levels were measured over the first 72 hours.
• Infants were fed standard protein-containing formulas.

Main Results:

• Significant differences observed between newborn cord blood and maternal blood gastrin levels.
• Fasting serum gastrin levels significantly increased in infants within the first 72 hours.
• No significant elevation in serum gastrin was observed after feeding protein-containing formulas.

Conclusions:

• Neonatal serum gastrin levels naturally rise in the first 72 hours of life.
• Infant gastric antrum shows a relative insensitivity to protein-stimulated gastrin release compared to adults.
• Further research is needed to understand the implications of this altered gastrin response in neonates.