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Hepatotoxicity of nucleoside reverse transcriptase inhibitors
Valentina Montessori1, Marianne Harris, Julio S G Montaner
1Clinical Assistant Professor, University of British Columbia, Vancouver, Canada. valm@hivnet.ubc.ca
Seminars in Liver Disease
|June 12, 2003
Summary
Nucleoside reverse transcriptase inhibitors (NRTIs) can cause liver damage, including hepatic steatosis and lactic acidosis. Mitochondrial dysfunction from NRTI use is the cause, necessitating early recognition and intervention for patient safety.
Area of Science:
- Hepatology
- Pharmacology
- Mitochondrial Biology
Background:
- Hepatotoxicity is a known adverse effect of antiretroviral drugs, particularly nucleoside reverse transcriptase inhibitors (NRTIs).
- A rare but fatal complication of NRTI monotherapy, hepatic steatosis with lactic acidosis, was identified in the early 1990s.
- Current combination antiretroviral therapies often involve long-term exposure to multiple NRTIs.
Purpose of the Study:
- To review the mechanisms and clinical manifestations of NRTI-induced hepatotoxicity.
- To highlight the increasing frequency of hepatic steatosis, lactic acidosis, and chronic hyperlactatemia.
- To emphasize the importance of early detection and management of these adverse effects.
Main Methods:
- Review of literature on NRTI-associated hepatotoxicity.
- Analysis of clinical syndromes including hepatic steatosis, lactic acidosis, and chronic hyperlactatemia.
- Discussion of the underlying mechanism involving inhibition of human DNA polymerase gamma.
Main Results:
- NRTI-induced mitochondrial dysfunction is the primary mechanism of liver injury.
- Hepatic steatosis and lactic acidosis are observed more frequently with current treatment strategies.
- Chronic hyperlactatemia is a recently recognized adverse effect.
Conclusions:
- NRTI-induced hepatotoxicity, mediated by mitochondrial dysfunction, requires vigilant monitoring.
- Early recognition and prompt intervention are crucial to prevent severe outcomes.
- Understanding these adverse effects is essential for managing patients on long-term antiretroviral therapy.