A novel rat model simulating biliary atresia after a Kasai operation

Area of Science:

• Hepatology
• Surgical Research
• Animal Models

Background:

• Biliary atresia (BA) is a severe neonatal liver disease.
• The Kasai operation is a palliative treatment for BA.
• Liver fibrosis mechanisms post-Kasai operation require further investigation.

Purpose of the Study:

• To establish a rat model simulating biliary atresia (BA) after a Kasai operation.
• To investigate the efficacy of common bile duct (CBD) cystojejunostomy in mitigating liver fibrosis.

Main Methods:

• Newborn rats underwent common hepatic duct (CHD) intubation and common bile duct (CBD) ligation, followed by ethanol injection into the intrahepatic duct (IHD).
• CBD cystojejunostomy was performed on a subset of rats.
• Liver fibrosis was assessed using Ishak fibrosis scoring.

Main Results:

• The model successfully induced biliary fibrosis, CBD cysts, and IHD obliteration, mimicking BA.
• CBD cystojejunostomy resulted in jaundice-free outcomes in 70% of rats.
• Jaundice-free rats exhibited significantly lower liver fibrosis scores compared to jaundiced rats.

Conclusions:

• CBD cystojejunostomy five weeks post-procedure is a viable model for studying liver fibrosis in BA.
• This model facilitates research into the mechanisms and potential treatments for liver fibrosis in BA following the Kasai operation.