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Updated: Aug 20, 2026
Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
Published on: January 31, 2022
Microarray analysis in human hepatocytes suggests a mechanism for hepatotoxicity induced by trovafloxacin
Michael J Liguori1, Mark G Anderson, Stanley Bukofzer
1Global Pharmaceutical Research and Development, Abbott Laboratories, Abbott Park, IL 60064-6104, USA.
Abstract:
Idiosyncratic drug toxicity, defined as toxicity that is dose independent, host dependent, and usually cannot be predicted during preclinical or early phases of clinical trials, is a particularly confounding complication of drug development. An understanding of the mechanisms that lead to idiosyncratic liver toxicity would be extremely beneficial for the development of new compounds. We used microarray analysis on isolated human hepatocytes to understand the mechanisms underlying the idiosyncratic toxicity induced by trovafloxacin. Our results clearly distinguish trovafloxacin from other marketed quinolone agents and identify unique gene changes induced by trovafloxacin that are involved in mitochondrial damage, RNA processing, transcription, and inflammation that may suggest a mechanism for the hepatotoxicity induced by this agent. In conclusion, this work establishes the basis for future microarray analysis of new compounds to determine the presence of these expression changes and their usefulness in predicting idiosyncratic hepatotoxicity. Supplementary material for this article can be found on the HEPATOLOGY website (http://interscience. Wiley.com/jpages/0270-9139/suppmat/index.htnd).
Insights
Idiosyncratic drug toxicity, a complex challenge in drug development, was investigated using microarray analysis. Trovafloxacin uniquely alters genes involved in mitochondrial damage, inflammation, and RNA processing, offering insights into drug-induced liver injury.
Area of Science:
- Pharmacology
- Hepatology
- Toxicology
Background:
- Idiosyncratic drug toxicity is unpredictable and dose-independent, complicating drug development.
- Understanding mechanisms of idiosyncratic liver toxicity is crucial for safer drug discovery.
- Trovafloxacin is a quinolone antibiotic known to cause liver injury.
Purpose of the Study:
- To elucidate the molecular mechanisms underlying trovafloxacin-induced idiosyncratic liver toxicity.
- To identify unique gene expression changes associated with trovafloxacin hepatotoxicity.
- To establish a basis for predicting idiosyncratic hepatotoxicity using gene expression profiling.
Main Methods:
- Microarray analysis was performed on isolated human hepatocytes.
- Gene expression profiles were analyzed to identify changes induced by trovafloxacin.
- Trovafloxacin's gene expression signature was compared to other quinolone agents.
Main Results:
- Trovafloxacin induced unique gene expression changes distinct from other quinolones.
- Affected genes were involved in mitochondrial damage, RNA processing, transcription, and inflammation.
- These changes suggest potential mechanisms for trovafloxacin-induced hepatotoxicity.
Conclusions:
- Microarray analysis can identify unique molecular signatures of drug-induced liver injury.
- Gene expression profiling may serve as a predictive tool for idiosyncratic hepatotoxicity.
- This approach can aid in the development of safer pharmaceutical compounds.