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Hepatitis C recurrence is not associated with allograft steatosis within the first year after liver transplantation
Victor I Machicao1, Murli Krishna, Hugo Bonatti
1Division of Hepatology and Gastroenterology, Mayo Clinic, Jacksonville, FL 32216, USA.
Insights
Allograft steatosis, or fatty liver, occurs similarly in hepatitis C (HCV) and non-HCV patients after liver transplantation (LT). Recipient body mass index (BMI) predicts steatosis severity in HCV patients.
Area of Science:
- Hepatology
- Transplantation immunology
- Viral hepatitis
Background:
- The natural history of allograft steatosis in hepatitis C (HCV)-infected patients post-liver transplantation (LT) requires further elucidation.
- Understanding factors influencing allograft steatosis is crucial for managing post-transplant outcomes.
Purpose of the Study:
- To investigate the relationship between allograft steatosis and HCV recurrence after LT.
- To identify predictors of allograft steatosis in HCV-infected recipients.
Main Methods:
- Retrospective analysis of liver transplant recipients from March 1998 to December 2001.
- Histological scoring of explanted liver tissue and biopsies (1 week, 4 months, 12 months) for steatosis, fibrosis, and activity.
- Comparison of allograft steatosis incidence and severity between HCV-infected and non-HCV-infected patients.
Main Results:
- Allograft steatosis incidence was similar in HCV (40% at 4 months, 36% at 1 year) and non-HCV patients.
- Higher donor age and recipient body mass index (BMI) at or after LT predicted increased allograft steatosis in HCV patients.
- Allograft steatosis severity did not correlate with fibrosis or necroinflammatory scores.
Conclusions:
- HCV and non-HCV patients exhibit similar high incidences of allograft steatosis post-LT.
- Recipient BMI is a significant predictor of allograft steatosis severity in HCV-infected liver transplant recipients.
- Allograft steatosis does not predict the severity of HCV recurrence within the first year post-LT.
Abstract:
The natural history of allograft steatosis in hepatitis C (HCV)-infected patients after liver transplantation (LT) is poorly understood. The aim of our study was to determine the relationship of allograft steatosis to HCV recurrence after LT. All patients undergoing LT at our center from March 1998 to December 2001 were included in the study. Explanted liver tissue and liver biopsies performed at 1 week, 4 months, and 12 months were scored for degree of allograft steatosis (0-4), fibrosis (0-6), and modified histological activity index (0-18). One hundred sixty-seven HCV and 235 non-HCV-infected patients (control group) underwent LT. Of these patients, 122 HCV and 154 non-HCV patients had a viable graft at 1 year and were analyzed. Allograft steatosis was present in 40% of HCV patients at 4 months and 36% at 1 year. The incidence of allograft steatosis after LT was similar in HCV-infected and non-HCV-infected patients (P not significant). Age of the donor (P =.041), or higher recipient body mass index (BMI) at the time of LT (P =.015) or at 12 months after LT (P =.041) predicted a higher degree of allograft steatosis at 12 months in the HCV group. Degree of allograft steatosis was not associated with higher fibrosis or necroinflammatory score. In conclusion, there is a similar high incidence of allograft steatosis in HCV and non-HCV-infected patients after LT. A high BMI of the HCV-infected recipient is the best predictor for high degree of allograft steatosis after LT. Allograft steatosis does not predict the severity of HCV recurrence in the first 12 months after LT.
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