Publications by authors named "Paul Hayashi"

Introduction: Hyman Zimmerman observed that hepatocellular (HC) drug-induced liver injury (DILI) with jaundice had a mortality rate of ≥ 10% (Hy Law). Hy Law does not specify the timing of liver tests nor the definition of HC DILI versus cholestatic or mixed (C/M) DILI. We aimed to assess the validity of Hy Law in the prospective DILI Network (DILIN) cohort.

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Background: Drug-induced liver injury (DILI) is a major concern for oncology drugs in clinical practice and under development. Monitoring cancer patients for hepatotoxicity is challenging as these patients may have abnormal liver tests pre-treatment or on-study for many reasons including liver injury due to past oncology treatments, hepatic metastases, medical co-morbidities such as heart failure, and concomitant medications. At present, there are no regulatory guidelines or position papers that systematically address best practices pertaining to DILI detection, assessment and management in oncology patients.

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Background: Azithromycin (AZ) is a widely used antibiotic. The aim of this study was to characterise the clinical features, outcomes, and HLA association in patients with drug-induced liver injury (DILI) due to AZ.

Methods: The clinical characteristics of individuals with definite, highly likely, or probable AZ-DILI enrolled in the US Drug-Induced Liver Injury Network (DILIN) were reviewed.

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Introduction: On-treatment excursions of liver laboratory test values in clinical trials involving subjects with underlying liver disease are relevant for the efficacy and safety assessment of drug products and biologics. Existing visualization and analysis tools do not efficiently provide an integrated view of these excursions when baseline liver tests are abnormal.

Objective: The aim of this study was to develop a composite plot that enables visualization of on-treatment changes in liver test results both as multiples of the upper limit of normal defined by each laboratory's reference population (×ULN) and multiples of the subjects' baseline (×BLN) values.

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Objective: To describe hepatotoxicity due to amiodarone and dronedarone from the DILIN and the US FDA's surveillance database.

Methods: Hepatotoxicity due to amiodarone and dronedarone enrolled in the U.S.

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Article Synopsis
  • The text discusses the challenges of assessing drug-induced liver injury (DILI) in clinical trials for metabolic dysfunction-associated steatohepatitis (MASH) without routine liver biopsies.
  • It details the efforts of the Liver Forum, which organized webinars and formed a Histology Working Group to develop consensus documents on the role of liver biopsy in DILI assessment during MASH trials from 2020 to 2022.
  • The findings suggest that while liver biopsy is not always definitive, histologic evaluation can provide essential insights that influence patient management, clarify the nature of liver injury, and inform drug development decisions.
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Background: Intravenous vancomycin therapy can cause liver injury as well as "drug reaction with eosinophilia and systemic symptoms" (DRESS) syndrome. This study aimed to better define the clinical features and HLA associations of vancomycin-induced liver injury.

Objective: To describe clinical, biochemical, and temporal characteristics of vancomycin-induced liver injury.

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Background Aims: Early-stage HCC can be treated with thermal ablation or stereotactic body radiation therapy (SBRT). We retrospectively compared local progression, mortality, and toxicity among patients with HCC treated with ablation or SBRT in a multicenter, US cohort.

Approach Results: We included adult patients with treatment-naïve HCC lesions without vascular invasion treated with thermal ablation or SBRT per individual physician or institutional preference from January 2012 to December 2018.

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Drug-induced liver injury (DILI) can mimic almost all other liver disorders. A phenotype increasingly ascribed to drugs is autoimmune-like hepatitis (ALH). This article summarises the major topics discussed at a joint International Conference held between the Drug-Induced Liver Injury consortium and the International Autoimmune Hepatitis Group.

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Introduction: Hepatitis E virus (HEV) infection rarely causes icteric hepatitis, yet 10%-40% of adult Americans have serological evidence of previous infection. The aim of this study was to investigate the incidence, presentation, and outcome of acute and previous HEV infection in a large cohort of patients with suspected drug-induced liver injury (DILI).

Methods: Serum samples from 2012 patients enrolled in the DILI Network were tested for anti-HEV immunoglobulin G (IgG).

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Introduction: Indeterminate acute liver failure (IND-ALF) is a rare clinical syndrome with a high mortality rate. Lacking a known etiology makes rapid evaluation and treatment difficult, with liver transplantation often considered as the only therapeutic option. Our aim was to identify genetic variants from whole exome sequencing data that might be associated with IND-ALF clinical outcomes.

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Background & Aims: The utility of liver biopsy in diagnosing or staging idiosyncratic drug-induced liver injury (DILI) is unclear. The aim of this study was to determine whether liver histology impacted causality assessment in suspected DILI using a novel simulation model.

Methods: Fifty patients enrolled in the DILI Network (DILIN) who had liver biopsies performed within 60 days of DILI onset were randomly selected.

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Background And Aims: Roussel Uclaf Causality Assessment Method (RUCAM) for DILI has been hindered by subjectivity and poor reliability. We sought to improve the RUCAM using data from the Drug-Induced Liver Injury Network (DILIN) and the Spanish DILI Registry, published literature, and iterative computer modeling.

Approach And Results: RUCAM criteria were updated, clarified, and computerized.

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Goal: The goal of this study was to determine if bariatric surgeries are associated with de novo alcohol-related complications.

Background: Bariatric surgery is associated with an increased risk of alcohol use disorders. The effect of bariatric surgeries on other alcohol-related outcomes, including liver disease, is understudied.

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Causality assessment for suspected drug-induced liver injury (DILI) during drug development and following approval is challenging. The IQ DILI Causality Working Group (CWG), in collaboration with academic and regulatory subject matter experts (SMEs), developed this manuscript with the following objectives: (1) understand and describe current practices; (2) evaluate the utility of new tools/methods/practice guidelines; (3) propose a minimal data set needed to assess causality; (4) define best practices; and (5) promote a more structured and universal approach to DILI causality assessment for clinical development. To better understand current practices, the CWG performed a literature review, took a survey of member companies, and collaborated with SMEs.

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Background: Early treatment of hepatocellular carcinoma (HCC) is associated with improved survival, but many patients with HCC do not receive therapy. We aimed to examine factors associated with HCC treatment and survival among incident patients with HCC in a statewide cancer registry.

Materials And Methods: All patients with HCC from 2003 through 2013 were identified in the North Carolina cancer registry.

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Background: Kratom is a botanical product used as an opium substitute with abuse potential.

Methods: Assessment of suspected cases of kratom-induced liver injury in a prospective US cohort.

Results: Eleven cases of liver injury attributed to kratom were identified with a recent increase.

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Oxaliplatin is an alkylating agent given with fluorouracil and leucovorin as a mainstay adjuvant chemotherapy for stage III colorectal cancer (CRC). Liver injury from oxaliplatin ranges from mild liver enzyme increases in 42% to 57% of patients in clinical trials to rare severe injury leading to acute liver failure. Chronic injury from endothelial cell damage and architectural distortion may manifest years later with nodular regenerative hyperplasia (NRH), portal sclerosis, and noncirrhotic portal hypertension (NCPH).

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Lymph node metastases from hepatocellular carcinoma (HCC) represents a challenging clinical scenario with a poor prognosis, especially in the setting of prior liver transplant. Long-term survival is achievable in select patients with isolated lymph node metastases who undergo surgical resection, but little data exist regarding non-surgical options. For intrahepatic HCC, stereotactic body radiation therapy (SBRT) has emerged as a standard and effective nonsurgical treatment option.

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