3.8 Article

Methotrexate Hepatotoxicity in Children with Juvenile Idiopathic Arthritis: A Single-Center Study

Journal

CURRENT RHEUMATOLOGY REVIEWS
Volume 17, Issue 2, Pages 242-246

Publisher

BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/1573397116666201211123142

Keywords

Juvenile idiopathic arthritis; methotrexate; hepatotoxicity

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The study aimed to evaluate the frequency of hepatotoxicity in JIA children receiving MTX, with 28% of patients developing liver chemistry abnormalities. Children on MTX had higher ALT and AST levels, but lower ALP levels compared to those not on MTX, with no significant differences in other factors.
Background: Juvenile idiopathic arthritis (JIA) could be disabling if left untreated. Methotrexate (MTX) is well known as a cornerstone in management. However, its adverse effects may limit treatment. Objective: The objective of this study was to evaluate the frequency of hepatotoxicity based on liver chemistry in JIA children receiving MTX. Methods: An observational case-control study of children with JIA who attend the Pediatric Rheumatology Unit, Cairo University Pediatric Hospital, Egypt, from January 2018 to December 2018 was carried out. Data were retrieved for 80 children; 50 (62.5%) were prescribed MTX. Their demographic, clinical characteristics, mean dose, duration of MTX therapy and other medications were described. Hepatotoxicity was defined as at least one value above the normal laboratory range of either ALT or AST during the study period. Results: Fourteen patients developed hepatotoxicity, giving an incidence of 28%. Children receiving MTX had higher alanine aminotransferase (ALT) interquartile range (IQR) (26 [21-359] vs. 23[20-32]; p =0.003), higher aspartate aminotransferase (AST) interquartile range (IQR) (31 [22-267] vs. 28[2-35] IU/L; p <0.001), and lower alkaline phosphatase (ALP) mean (+/- SD) (98 +/- 35.5 vs. 256 +/- 39.5 IU/L; p <0.001). However, there were no significant differences in age, sex, weight, type of JIA, and duration of MTX treatment (p< 0.05). Conclusion: Hepatotoxicity due to MTX, based on liver chemistry, is common among children with JIA.

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