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Post-natal changes in biliary lipids in suckling goat kids
J I Fernández1, J A Naranjo, A Valverde
1Departamento de Fisiología, University of Granada, Spain.
Insights
Biliary lipid composition in young goats changes significantly in the first month of life. Bile flow and bile acid concentrations increase, while cholesterol decreases, with taurine-conjugated bile acids predominating.
Area of Science:
- Veterinary Medicine
- Gastroenterology
- Animal Physiology
Background:
- Biliary lipid composition is crucial for digestion and absorption.
- Understanding post-natal changes in young animals is vital for their health and development.
- Goat kids, as pre-ruminants, have unique physiological adaptations.
Purpose of the Study:
- To investigate the changes in biliary lipid composition in suckling goat kids during the first month of life.
- To analyze the concentrations of bile acids and cholesterol in hepatic and vesicular bile.
- To compare the composition of hepatic and vesicular bile and assess gallbladder function.
Main Methods:
- Hepatic and vesicular bile samples were collected from suckling goat kids.
- Bile samples were analyzed for lipid composition, including bile acids and cholesterol.
- Bile flow and concentrations were measured over the first month of life.
Main Results:
- Bile flow increased with age in goat kids.
- Bile acid concentration rose up to 14 days, then stabilized.
- Cholesterol levels were highest at birth and decreased thereafter.
- Taurine-conjugated bile acids were predominant, a pattern consistent across ages.
- The gallbladder showed a poor concentration capacity in pre-ruminant kids.
Conclusions:
- Biliary lipid composition undergoes significant post-natal development in goat kids.
- The predominance of taurine-conjugated bile acids is a key feature of goat biliary physiology.
- Gallbladder function in pre-ruminant kids is immature, impacting bile concentration.
Abstract:
The post-natal composition of biliary lipids in the bile of suckling goat kids has been studied during the first month of life. Samples of hepatic and vesicular bile were obtained from animals fed with milk. Bile flow increased with age and the concentration of bile acids also rose up to 14 days of age. Cholesterol reached maximum values immediately after birth and then decreased. Bile acids conjugated with taurine predominated and this pattern of preferential tauroconjugation persisted at all ages, as has also been found in carnivores and sheep. Comparison of vesicular and hepatic bile composition revealed a poor concentration capacity of the gallbladder in pre-ruminant kids.