Abstract
3-Hydroxy-3-methylglutaryl-CoA lyase (HL) deficiency is an inherited disorder of organic acid metabolism biochemically characterized by tissue accumulation and high urinary excretion of 3-hydroxy-3-methylgutarate, 3-methylglutarate, 3-methylglutaconate and 3-hydroxyisovalerate. Affected patients predominantly present neurological symptoms that are accompanied by mild hepatopathy during episodes of catabolic crisis. The pathophysiology of this disease is poorly known, although recent animal and human in vitro and in vivo studies have suggested that oxidative stress caused by the major accumulating organic acids may represent a pathomechanism of brain and liver damage in HL deficiency. In this review we focus on the deleterious effects of these carboxylic acids on redox homeostasis in rat and human tissues that may offer new perspectives for potential novel adjuvant therapeutic strategies in this disorder.
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