A canine model for hepatic venoocclusive disease

Area of Science:

• Hepatology
• Transplantation Medicine
• Toxicology

Background:

• Hepatic veno-occlusive disease (VOD) is a life-threatening complication following bone marrow transplantation (BMT).
• VOD is also linked to hepatic irradiation and chemotherapy, but its pathogenesis and treatment remain poorly understood.
• Developing reliable animal models is crucial for advancing VOD research.

Purpose of the Study:

• To establish a reproducible canine model for studying hepatic veno-occlusive disease (VOD).
• To evaluate the efficacy of monocrotaline, busulfan, and whole-liver irradiation in inducing VOD in dogs.

Main Methods:

• Three groups of dogs were studied: Group 1 received monocrotaline (MC) orally; Group 2 received daily busulfan; Group 3 received whole-liver irradiation.
• Dosing and duration varied based on drug administration or irradiation levels.
• Liver function, portal hypertension, and histological findings were assessed post-treatment.

Main Results:

• Monocrotaline administration (125 mg/kg) in 7 of 8 dogs resulted in significant liver abnormalities and histological VOD.
• Busulfan treatment showed minimal histological evidence of VOD in 3 of 6 dogs.
• Whole-liver irradiation (36 Gy) led to hepatic dysfunction and fibrosis in 3 of 6 dogs.

Conclusions:

• Monocrotaline administration provides a consistent and reproducible canine model for hepatic veno-occlusive disease.
• Busulfan and whole-liver irradiation yielded less reproducible VOD features in this study.
• Dogs represent a suitable large-animal model for future VOD research.