Human gallbladder bile becomes lithogenic during short-term intravenous hyperalimentation.

Area of Science:

• Gastroenterology
• Hepatology
• Metabolic Research

Background:

• Biliary sludge is a known complication of intravenous hyperalimentation (IVH).
• The specific changes in human bile lithogenicity during IVH treatment remain understudied.
• Understanding IVH-induced biliary sludge pathogenesis is crucial for patient management.

Purpose of the Study:

• To investigate the pathogenesis of biliary sludge formation in patients undergoing IVH.
• To determine changes in biliary lipid composition, cholesterol concentration, and nucleation time during IVH.
• To compare these parameters between IVH patients, healthy controls, and patients with cholesterol gallstones.

Main Methods:

• Gallbladder bile samples were collected from three groups: IVH patients (n=9), control patients (n=10), and cholesterol gallstone patients (n=14).
• Biliary lipid composition, vesicular cholesterol concentration, and nucleation time were analyzed.
• Statistical comparisons were made between the groups.

Main Results:

• Nucleation time was significantly shorter in the IVH group (7.8 days) compared to the control group (17.3 days).
• Vesicular cholesterol concentration was significantly higher in the IVH group (3.0 mM) than in the control group (0.9 mM).
• Cholesterol saturation index was higher in the IVH group (1.01) but not significantly different from controls (0.80).

Conclusions:

• IVH combined with fasting promotes early-stage gallbladder sludge formation.
• Rapid cholesterol nucleation and increased vesicular cholesterol are key factors in IVH-induced sludge.
• These findings provide insights into the lithogenic process during IVH therapy.