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Oxidative damage in human liver transplantation

F Biasi¹, M Bosco, I Chiappino

¹Department of Experimental Medicine and Oncology, University of Torino, Italy.

Free Radical Biology & Medicine

|September 1, 1995

Summary

This study investigated oxygen-dependent liver injury after transplantation. Key findings show increased oxidative stress and cell damage within 24 hours, linked to redox imbalance.

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Area of Science:

Hepatology
Transplantation Immunology
Oxidative Stress Research

Background:

Orthotopic liver transplantation (OLT) can lead to hepatic reperfusion injury.
The role of oxygen-dependent mechanisms in post-OLT injury requires further elucidation in humans.

Purpose of the Study:

To evaluate oxygen-dependent hepatic reperfusion injury in adult patients undergoing OLT.
To assess the relationship between redox balance markers and liver cell damage post-transplantation.

Main Methods:

Monitoring of blood indices for tissue redox balance in 19 adult OLT patients for 3 weeks.
Measurement of red cell malonaldehyde, plasma lipid peroxides, plasma vitamin E, red cell total glutathione, and plasma alanine aminotransferase.

Main Results:

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Significant increases in red cell malonaldehyde and plasma lipid peroxides post-reperfusion.
Decreased plasma vitamin E and red cell total glutathione observed concurrently.
Peak oxidative stress and maximum cytolysis (alanine aminotransferase) occurred within 24 hours post-reperfusion.
Redox imbalance was linearly related to irreversible cell damage; vitamin E levels correlated with oxidative stress.

Conclusions:

Toxic oxygen metabolites likely contribute to hepatic cytolysis following OLT in humans.
The monitored markers of redox imbalance are useful indicators of injury and cell damage.
Combined assessment of redox markers may aid in understanding and managing post-transplant liver injury.