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Hepatic methotrexate content and progression of hepatic fibrosis: preliminary findings.
  1. M J Ahern,
  2. S Kevat,
  3. W Hill,
  4. P J Hayball,
  5. H Harley,
  6. P D Hall
  1. Department of Medicine, Flinders University of South Australia.

    Abstract

    Liver tissue from 16 patients with rheumatoid arthritis was studied. The patients had received low dose methotrexate weekly for a minimum of 12 months between two liver biopsies. The progression of pericellular fibrosis was measured by computerised image analysis. Extracts of these liver biopsy specimens were pooled into five samples according to the progression of hepatic fibrosis and analysed by high performance liquid chromatography. The concentrations of methotrexate, 2,4 diamino-N(10)-methylpteroic acid, and methotrexate polyglutamate were markedly increased in the samples obtained from the three patients who recorded the greatest increase in fibrosis. These preliminary data suggest that progression of hepatic fibrosis is related to the retention of methotrexate and metabolites in the liver.

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