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Updated: May 10, 2026

Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
Published on: January 31, 2022
Drug-induced liver injury: mechanisms, types and biomarkers
M Vinken1, M Maes, T Vanhaecke
1Department of Toxicology, Center for Pharmaceutical Research, Vrije Universiteit Brussel, Laarbeeklaan 103, B-1090 Brussels, Belgium. mvinken@vub.ac.be
Abstract:
Drug-induced liver injury is a ubiquitous issue in clinical settings and pharmaceutical industry. Hepatotoxicity elicited by drugs may be intrinsic or idiosyncratic, both which are driven by different molecular mechanisms. Recently, a unifying mechanistic model of drug-induced liver injury has been introduced. According to this model, drug-induced hepatotoxicity relies on 3 consecutive steps, namely an initial cellular insult that leads to the occurrence of mitochondrial permeability transition, which in turn ultimately burgeons into the onset of cell death. Clinically, drug-induced liver injury can be manifested in a number of acute and chronic conditions, including hepatitis, cholestasis, steatosis and fibrosis. These pathologies can be diagnosed and monitored by addressing well-established physical, clinical chemistry and histopathological biomarkers. In the last few years, several novel read-outs of drug-induced liver injury have been proposed, involving genetic, epigenetic, transcriptomic, proteomic and metabolomic parameters. These new concepts and recent developments in the field of drug-induced liver injury are revised in the current paper.
Insights
Drug-induced liver injury (DILI) is a common problem. A new model explains DILI mechanisms, involving cellular insult, mitochondrial changes, and cell death, with novel biomarkers emerging.
Area of Science:
- Hepatology
- Toxicology
- Pharmacology
Background:
- Drug-induced liver injury (DILI) is a significant clinical and pharmaceutical challenge.
- DILI can be intrinsic or idiosyncratic, stemming from diverse molecular pathways.
- A unifying mechanistic model proposes DILI involves cellular insult, mitochondrial permeability transition, and cell death.
Purpose of the Study:
- To review recent advancements in understanding DILI mechanisms.
- To discuss novel biomarkers for DILI diagnosis and monitoring.
- To present a unifying mechanistic model of DILI.
Main Methods:
- Literature review of DILI mechanisms and biomarkers.
- Analysis of a unifying mechanistic model of DILI.
- Discussion of novel diagnostic and monitoring parameters.
Main Results:
- DILI pathogenesis is explained by a 3-step model: cellular insult, mitochondrial dysfunction, and cell death.
- Clinical manifestations of DILI include hepatitis, cholestasis, steatosis, and fibrosis.
- Emerging biomarkers include genetic, epigenetic, transcriptomic, proteomic, and metabolomic parameters.
Conclusions:
- The unifying mechanistic model provides a framework for understanding DILI.
- Novel biomarkers offer potential for improved DILI detection and management.
- Continued research into DILI mechanisms and biomarkers is crucial for patient safety.
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