Diet, age and intestinal bile acids in pigs

Area of Science:

• Comparative physiology
• Gastrointestinal physiology
• Neonatal development

Background:

• Bile acids are crucial for fat digestion and absorption.
• Neonatal digestive systems often have immature functions compared to adults.
• Dietary composition significantly influences metabolic processes.

Purpose of the Study:

• To compare total bile acid concentrations in neonatal piglets with adult pigs on different diets.
• To investigate the impact of diet on bile acid availability for digestion in pigs.
• To assess if neonatal piglet bile acid levels resemble adult pigs fed specific diets.

Main Methods:

• Measurement of total bile acid concentrations in gallbladder bile and duodenal juice.
• Comparison between neonatal piglets (sow milk-fed) and 10-week-old pigs (high-fat low-carbohydrate or low-fat high-carbohydrate diets).
• Statistical analysis to determine significant differences between groups.

Main Results:

• Adult pigs (both diets) exhibited significantly higher bile acid concentrations in gallbladder bile than neonatal piglets (p < 0.007).
• Pigs on the low-fat high-carbohydrate diet showed significantly higher bile acid concentrations in duodenal juice compared to high-fat low-carbohydrate fed pigs and piglets (p < 0.0001).
• Neonatal piglet bile acid concentrations were comparable to adult pigs adapted to a high-fat diet.

Conclusions:

• Neonatal pigs, similar to human neonates, possess reduced bile acid concentrations for digestion compared to adult pigs.
• Dietary fat content influences bile acid concentrations in the adult pig's digestive system.
• The study highlights developmental and dietary effects on bile acid metabolism in pigs.