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  3. Passive Jejunal Bile Salt Absorption Alters The Enterohepatic Circulation In Immature Rats
  1. Home
  3. Passive Jejunal Bile Salt Absorption Alters The Enterohepatic Circulation In Immature Rats

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Passive jejunal bile salt absorption alters the enterohepatic circulation in immature rats

G E Stahl1, M R Mascarenhas, J C Fayer

  • 1Division of Neonatology, Hospital of the University of Pennsylvania, Philadelphia.

Gastroenterology
|January 1, 1993

View abstract on PubMed

Summary
This summary is machine-generated.

Passive bile salt absorption in the jejunum decreases with age, impacting enterohepatic circulation. This age-related decline in absorption and hepatic clearance may explain bile salt level differences in immature animals and human neonates.

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Area of Science:

  • Gastroenterology
  • Developmental Biology
  • Physiology

Background:

  • Enterohepatic circulation is crucial for bile salt homeostasis.
  • Developmental changes in passive bile salt absorption can significantly alter this circulation.
  • Understanding these changes is key to explaining physiological differences in neonates.

Purpose of the Study:

  • To investigate age-related changes in passive bile salt absorption in the jejunum and ileum.
  • To determine how these changes affect overall bile salt homeostasis.
  • To correlate findings with bile salt levels in immature mammals and human neonates.

Main Methods:

  • Studied Sprague-Dawley rats at 14, 21, and 40 days of age.
  • Isolated and cannulated jejunum and ileum for bolus injection or perfusion with taurocholate and a marker.
  • Collected bile samples to quantify absorption and clearance rates.

    • Main Results:

    • Passive jejunal taurocholate absorption and absorption rates decreased significantly with age.
    • Total taurocholate absorption decreased, while hepatic taurocholate clearance increased with age.
    • Hepatic clearance was only saturated at 14 days, indicating developmental differences.

    Conclusions:

    • Decreased passive jejunal bile salt absorption with age is a key finding.
    • Reduced hepatic bile salt clearance in immature animals contributes to altered bile salt levels.
    • These developmental changes likely explain low intraluminal and high serum bile salt levels in neonates.