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Jee A, Sernoskie SC, Uetrecht J. Idiosyncratic Drug-Induced Liver Injury: Mechanistic and Clinical Challenges. Int J Mol Sci 2021; 22:ijms22062954. [PMID: 33799477 PMCID: PMC7998339 DOI: 10.3390/ijms22062954] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/08/2021] [Accepted: 03/11/2021] [Indexed: 02/08/2023] Open
Abstract
Idiosyncratic drug-induced liver injury (IDILI) remains a significant problem for patients and drug development. The idiosyncratic nature of IDILI makes mechanistic studies difficult, and little is known of its pathogenesis for certain. Circumstantial evidence suggests that most, but not all, IDILI is caused by reactive metabolites of drugs that are bioactivated by cytochromes P450 and other enzymes in the liver. Additionally, there is overwhelming evidence that most IDILI is mediated by the adaptive immune system; one example being the association of IDILI caused by specific drugs with specific human leukocyte antigen (HLA) haplotypes, and this may in part explain the idiosyncratic nature of these reactions. The T cell receptor repertoire likely also contributes to the idiosyncratic nature. Although most of the liver injury is likely mediated by the adaptive immune system, specifically cytotoxic CD8+ T cells, adaptive immune activation first requires an innate immune response to activate antigen presenting cells and produce cytokines required for T cell proliferation. This innate response is likely caused by either a reactive metabolite or some form of cell stress that is clinically silent but not idiosyncratic. If this is true it would make it possible to study the early steps in the immune response that in some patients can lead to IDILI. Other hypotheses have been proposed, such as mitochondrial injury, inhibition of the bile salt export pump, unfolded protein response, and oxidative stress although, in most cases, it is likely that they are also involved in the initiation of an immune response rather than representing a completely separate mechanism. Using the clinical manifestations of liver injury from a number of examples of IDILI-associated drugs, this review aims to summarize and illustrate these mechanistic hypotheses.
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Affiliation(s)
- Alison Jee
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada;
| | | | - Jack Uetrecht
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada;
- Department of Pharmaceutical Sciences, University of Toronto, Toronto, ON M5S 3M2, Canada;
- Correspondence:
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Rao T, Liu YT, Zeng XC, Li CP, Ou-Yang DS. The hepatotoxicity of Polygonum multiflorum: The emerging role of the immune-mediated liver injury. Acta Pharmacol Sin 2021; 42:27-35. [PMID: 32123300 PMCID: PMC7921551 DOI: 10.1038/s41401-020-0360-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 01/02/2020] [Indexed: 02/06/2023] Open
Abstract
Herbal and dietary supplements (HDS)-induced liver injury has been a great concern all over the world. Polygonum multiflorum Thunb., a well-known Chinese herbal medicine, is recently drawn increasing attention because of its hepatotoxicity. According to the clinical and experimental studies, P. multiflorum-induced liver injury (PM-DILI) is considered to be immune-mediated idiosyncratic liver injury, but the role of immune response and the underlying mechanisms are not completely elucidated. Previous studies focused on the direct toxicity of PM-DILI by using animal models with intrinsic drug-induced liver injury (DILI). However, most epidemiological and clinical evidence demonstrate that PM-DILI is immune-mediated idiosyncratic liver injury. The aim of this review is to assess current epidemiological, clinical and experimental evidence about the possible role of innate and adaptive immunity in the idiosyncratic hepatotoxicity of P. multiflorum. The potential effects of factors associated with immune tolerance, including immune checkpoint molecules and regulatory immune cells on the individual's susceptibility to PM-DILI are also discussed. We conclude by giving our hypothesis of possible immune mechanisms of PM-DILI and providing suggestions for future studies on valuable biomarkers identification and proper immune models establishment.
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Affiliation(s)
- Tai Rao
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, China.
- Hunan Key Laboratory of Pharmacogenetics, Institute of Clinical Pharmacology, Central South University, Changsha, 410008, China.
- Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, 410008, China.
- National Clinical Research Center for Geriatric Disorders, Changsha, 410008, China.
| | - Ya-Ting Liu
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, China
- Hunan Key Laboratory of Pharmacogenetics, Institute of Clinical Pharmacology, Central South University, Changsha, 410008, China
- Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, 410008, China
- National Clinical Research Center for Geriatric Disorders, Changsha, 410008, China
| | - Xiang-Chang Zeng
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, China
- Hunan Key Laboratory of Pharmacogenetics, Institute of Clinical Pharmacology, Central South University, Changsha, 410008, China
- Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, 410008, China
- National Clinical Research Center for Geriatric Disorders, Changsha, 410008, China
| | - Chao-Peng Li
- Hunan Key Laboratory for Bioanalysis of Complex Matrix Samples, Changsha, 410205, China
| | - Dong-Sheng Ou-Yang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, China.
- Hunan Key Laboratory of Pharmacogenetics, Institute of Clinical Pharmacology, Central South University, Changsha, 410008, China.
- Engineering Research Center of Applied Technology of Pharmacogenomics, Ministry of Education, Changsha, 410008, China.
- National Clinical Research Center for Geriatric Disorders, Changsha, 410008, China.
- Hunan Key Laboratory for Bioanalysis of Complex Matrix Samples, Changsha, 410205, China.
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