scholarly journals Development of a modified lymphocyte transformation test for diagnosing drug-induced liver injury associated with an adaptive immune response

2017 ◽  
Vol 14 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Jessica Whritenour ◽  
Mira Ko ◽  
Qing Zong ◽  
Jianying Wang ◽  
Karrie Tartaro ◽  
...  
2006 ◽  
Vol 20 (5) ◽  
Author(s):  
Mary Jane Masson ◽  
Christine J. Chung ◽  
Richard Peterson ◽  
Mary L. Graf ◽  
Jeffrey L Ambroso ◽  
...  

2016 ◽  
Vol 2016 ◽  
pp. 1-12
Author(s):  
Zanelle Bekker ◽  
Andrew Walubo ◽  
Jan B. Du Plessis

The aim of this study was to illustrate the initial subclinical drug-induced liver injury and the associated adaptive immune response by monitoring for the changes in plasma IL-2, IL-10, and some cytochrome P450 activity during chronic administration of nevirapine (NVP), isoniazid (INH), and paracetamol (PAR) in rats without clinical hepatotoxicity. Male Sprague-Dawley (SD) rats were divided into four groups (saline (S), NVP, INH, and PAR) of 25 animals each. The drugs were administered daily for 42 days at therapeutic doses (NVP 200 mg/kg, PAR 500 mg/kg, and INH 20 mg/kg) to the respective groups by oral gavage and five rats per group were sacrificed weekly. All the three drugs induced a subclinical liver injury in the first 2-3 weeks followed by healing, indicating adaption. The liver injury was pathologically similar and was associated with immune stimulation and increased cytochrome P450 activity. NVP- and PAR-induced liver injury lasted up to 14 days while that for INH lasted for 28 days. NVP-induced liver injury was associated with increased IL-2, CD4 count, and CYP3A2 activity, followed by increased IL-10 during the healing phase. In conclusion, the initial drug-induced subclinical liver injury, its spontaneous healing, and the associated adaptive immune response have been demonstrated.


2021 ◽  
Vol 22 (6) ◽  
pp. 2954
Author(s):  
Alison Jee ◽  
Samantha Christine Sernoskie ◽  
Jack Uetrecht

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.


2017 ◽  
Vol 49 (1) ◽  
pp. e15
Author(s):  
C. Bergamo ◽  
G. Germani ◽  
D. Bizzaro ◽  
C. Frasson ◽  
G. Basso ◽  
...  

2021 ◽  
Vol 12 ◽  
Author(s):  
Wenhui Liu ◽  
Xiangchang Zeng ◽  
Yating Liu ◽  
Jinfeng Liu ◽  
Chaopeng Li ◽  
...  

Drug-induced liver injury (DILI) has become one of the major challenges of drug safety all over the word. So far, about 1,100 commonly used drugs including the medications used regularly, herbal and/or dietary supplements, have been reported to induce liver injury. Moreover, DILI is the main cause of the interruption of new drugs development and drugs withdrawn from the pharmaceutical market. Acute DILI may evolve into chronic DILI or even worse, commonly lead to life-threatening acute liver failure in Western countries. It is generally considered to have a close relationship to genetic factors, environmental risk factors, and host immunity, through the drug itself or its metabolites, leading to a series of cellular events, such as haptenization and immune response activation. Despite many researches on DILI, the specific biomarkers about it are not applicable to clinical diagnosis, which still relies on the exclusion of other causes of liver disease in clinical practice as before. Additionally, circumstantial evidence has suggested that DILI is mediated by the immune system. Here, we review the underlying mechanisms of the immune response to DILI and provide guidance for the future development of biomarkers for the early detection, prediction, and diagnosis of DILI.


2021 ◽  
Vol 10 (19) ◽  
pp. 4432
Author(s):  
Ana Delgado ◽  
Stefan Stewart ◽  
Mikel Urroz ◽  
Amelia Rodríguez ◽  
Alberto M. Borobia ◽  
...  

Coronavirus disease 2019 (COVID-19) has a wide spectrum of clinical manifestations. An elevation of liver damage markers has been observed in numerous cases, which could be related to the empirical use of potentially hepatotoxic drugs. The aim of this study was to describe the clinical and analytical characteristics and perform a causality analysis from laboratory signals available of drug-induced liver injury (DILI) detected by a proactive pharmacovigilance program in patients hospitalised for COVID-19 at La Paz University Hospital in Madrid (Spain) from 1 March 2020 to 31 December 2020. The updated Roussel Uclaf Causality Assessment Method (RUCAM) was employed to assess DILI causality. A lymphocyte transformation test (LTT) was performed on 10 patients. Ultimately, 160 patients were included. The incidence of DILI (alanine aminotransferase >5, upper limit of normal) was 4.9%; of these, 60% had previous COVID-19 hepatitis, the stay was 8.1 days longer and 98.1% were being treated with more than 5 drugs. The most frequent mechanism was hepatocellular (57.5%), with mild severity (87.5%) and subsequent recovery (88.1%). The most commonly associated drugs were hydroxychloroquine, azithromycin, tocilizumab and ceftriaxone. The highest incidence rate of DILI per 10,000 defined daily doses (DDD) was with remdesivir (992.7/10,000 DDD). Some 80% of the LTTs performed were positive, with a RUCAM score of ≥4. The presence of DILI after COVID-19 was associated with longer hospital stays. An immune mechanism has been demonstrated in a small subset of DILI cases.


2018 ◽  
Author(s):  
Fernando Bessone ◽  
Raúl J Andrade

Idiosyncratic drug-induced liver injury (DILI) caused by xenobiotics (drugs, herbals, and dietary supplements) is an elusive liver disease presenting with a range of phenotypes and severity, including acute hepatitis that is indistinguishable from viral hepatitis, autoimmune hepatitis, steatosis, fibrosis or rare chronic vascular syndromes, asymptomatic liver test abnormalities,and acute liver failure. Case definition and characterization using liver biochemistry and histology are crucial for appropriate phenotyping. The incidence of DILI is probably higher than expected by the cases that are identified in clinical practice because of misdiagnosis and underreporting.The pathogenesis of DILI is complex, depending on the interaction of a drug’s physicochemical properties and host factors. Genome-wide association studies have identified several alleles from the major histocompatibility complex system, indicating a fundamental role of the adaptive immune system in DILI pathogenesis. As specific biomarkers for hepatotoxicity are still not available, the diagnosis of DILI remains one of exclusion of the alternative causes of liver damage. Structured causality assessment using the Roussel Uclaf Causality Assessment Method (RUCAM) or previously Council for International Organizations of Medical Sciences (CIOMS) instrument adds consistency to the diagnostic process, although there is room for improvement in the scale domains and score weighting. The therapy for idiosyncratic hepatotoxicity is supportive and relies on the prompt withdrawal of the offending agent. Corticosteroid therapy for hypersensitivity reactions or ursodeoxycholicacid for prolonged cholestasis is empirically used, although the degree of evidence is low. Existing databases have enabled a better prediction of immediate and long-term DILI prognosis. Multivariate models have identified clinical and analytical variables as predictive of acute liver failure and mortality as well as of chronic DILI. This review contains 2 figures, 5 tables, and 55 references Key Words: adaptive immune system; causality assessment; drug-induced liver injury; epidemiology; HLA alleles; pharmacogenetics; registries; risk factors


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