Medecine/Sciences 2003-Oct
[Hereditary tyrosinemia: an endoplasmic reticulum stress disorder?].
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Abstrakt
Hereditary tyrosinemia type 1 (HT1) is the most severe metabolic disease associated with tyrosine catabolism. An accumulation of toxic metabolites seems responsible for the pathology of HT1. The metabolite fumarylacetoacetate, accumulating due to a deficiency in fumarylacetoacetate hydrolase, displays apoptogenic, mutagenic, aneugenic and mitogenic activities. These effects may underlie the tumorigenic phenomenon observed in HT1. Fumarylacetoacetate in addition to causing disturbances in Ca2+ homeostasis, may induce endoplasmic reticulum stress.