Preoperative bile replacement improves immune function for jaundiced patients treated with external biliary drainage

Area of Science:

• Hepatology
• Immunology
• Gastroenterology

Background:

• External biliary drainage (EBD) is used for jaundiced patients, but its role is debated.
• Bile replacement (BR) may improve intestinal barrier function after EBD, though mechanisms are unclear.
• This study investigates the impact of BR on immune functions in jaundiced patients.

Purpose of the Study:

• To evaluate the effect of bile replacement (BR) on immune functions in jaundiced patients undergoing external biliary drainage (EBD).
• To assess changes in lymphocyte proliferation and serum diamine oxidase (DAO) activity during BR.
• To compare outcomes in patients receiving BR versus those receiving EBD alone.

Main Methods:

• A prospective study of 15 jaundiced patients receiving oral BR (200 ml/day) for 14 days post-EBD.
• Measurements included lymphocyte proliferation (Con A, PHA) and serum DAO activity.
• A control group of 20 patients with EBD but no BR was analyzed.

Main Results:

• BR improved serum liver enzymes, prothrombin time-international normalized ratio (PT-INR), and lymphocyte responses to Con A and PHA over 14 days.
• No improvements in lymphocyte percentages or DAO levels were observed.
• The control group showed no improvement in PT-INR or lymphocyte responses during EBD alone.
• Higher fractions of BR correlated with significant PT-INR decrease.

Conclusions:

• Preoperative bile replacement (BR) is beneficial for improving blood coagulability and cellular immunity in patients with external biliary drainage (EBD).
• Maximizing the quantity of bile used for replacement appears to enhance these positive effects.