Harshad Devarbhavi1, Marwan Ghabril2, Huiman Barnhart3, Mallikarjun Patil1, Sujata Raj4, Jiezhun Gu3, Naga Chalasani2, Herbert L Bonkovsky5. 1. Department of Gastroenterology and Hepatology, St. John's Medical College Hospital, Bangalore, India. 2. Division of Gastroenterology and Hepatology, Indiana University School of Medicine, Indianapolis, Indiana, USA. 3. Duke Clinical Research Institute, Duke University, Durham, North Carolina, USA. 4. Department of Dermatology, St. John's Medical College Hospital, Bangalore, India. 5. Section on Gastroenterology & Hepatology, Department of Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA.
Abstract
BACKGROUND: Leflunomide, a disease-modifying anti-rheumatic drug, has been associated with elevations of serum aminotransferases. Herein, we describe the clinical, laboratory features and outcomes of 17 patients with leflunomide/teriflunomide hepatotoxicity from two large drug-induced liver injury (DILI) registries. METHODS: Consecutive, adjudicated cases of leflunomide (n = 16)-or teriflunomide (n = 1)-related DILI from a single centre in Bangalore, India and the multicentre US Drug-Induced Liver Injury Network (DILIN) were reviewed. RESULTS: Nine (0.8%) of the 1070 Indian patients and 8 (0.5%) of the 1400 DILIN patients fulfilled the criteria for DILI because of leflunomide- or teriflunomide. 89% of the Indian cases were women and all were associated with severe cutaneous adverse reaction (SCAR) and a median drug latency of 49 days, whereas 37.5% of the DILIN cases were female, none exhibited SCAR and the median drug latency was 166 days. Hepatocellular injury (70%) was more common in women than men (92% vs. 20%) and was associated with younger mean age (41 vs. 59 years), higher peak INR (2.3 vs. 1.2) and higher mortality (58% vs. 0%). Mortality was observed in six patients from India (2 of the three with myocarditis) and one received liver transplantation from the USA. CONCLUSION: Leflunomide-induced liver injury is predominantly hepatocellular. Leflunomide hepatotoxicity is more likely accompanied by SCAR, a short latency and a higher mortality in the Indian cohort, with a predominance of females, compared to US DILIN patients. The differences in skin involvement, immunoallergic features and outcomes among subjects from India vs. the USA suggest that genetic or environmental factors are important in the pathogenesis of liver injury.
BACKGROUND: Leflunomide, a disease-modifying anti-rheumatic drug, has been associated with elevations of serum aminotransferases. Herein, we describe the clinical, laboratory features and outcomes of 17 patients with leflunomide/teriflunomide hepatotoxicity from two large drug-induced liver injury (DILI) registries. METHODS: Consecutive, adjudicated cases of leflunomide (n = 16)-or teriflunomide (n = 1)-related DILI from a single centre in Bangalore, India and the multicentre US Drug-Induced Liver Injury Network (DILIN) were reviewed. RESULTS: Nine (0.8%) of the 1070 Indian patients and 8 (0.5%) of the 1400 DILIN patients fulfilled the criteria for DILI because of leflunomide- or teriflunomide. 89% of the Indian cases were women and all were associated with severe cutaneous adverse reaction (SCAR) and a median drug latency of 49 days, whereas 37.5% of the DILIN cases were female, none exhibited SCAR and the median drug latency was 166 days. Hepatocellular injury (70%) was more common in women than men (92% vs. 20%) and was associated with younger mean age (41 vs. 59 years), higher peak INR (2.3 vs. 1.2) and higher mortality (58% vs. 0%). Mortality was observed in six patients from India (2 of the three with myocarditis) and one received liver transplantation from the USA. CONCLUSION: Leflunomide-induced liver injury is predominantly hepatocellular. Leflunomide hepatotoxicity is more likely accompanied by SCAR, a short latency and a higher mortality in the Indian cohort, with a predominance of females, compared to US DILIN patients. The differences in skin involvement, immunoallergic features and outcomes among subjects from India vs. the USA suggest that genetic or environmental factors are important in the pathogenesis of liver injury.
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