Defects in OPA3 are the cause of 3-methylglutaconic aciduria type 3 (MGA3) [MIM:258501]; also known as optic atrophy plus syndrome or Costeff optic atrophy syndrome. MGA3 is an autosomal recessive neuro-ophthalmologic syndrome consisting of early-onset bilateral optic atrophy, spasticity, extrapyramidal dysfunction, and cognitive deficit. Urinary excretion of 3-methylglutaconic acid and 3-methylglutaric acid is increased. MGA3 can be distinguished from MGA1 by the absence of increase of 3-hydroxyisovaleric acid levels.
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Defects in OPA3 are the cause of 3-methylglutaconic aciduria type 3 (MGA3) [MIM:258501]; also known as optic atrophy plus syndrome or Costeff optic atrophy syndrome. MGA3 is an autosomal recessive neuro-ophthalmologic syndrome consisting of early-onset bilateral optic atrophy, spasticity, extrapyramidal dysfunction, and cognitive deficit. Urinary excretion of 3-methylglutaconic acid and 3-methylglutaric acid is increased. MGA3 can be distinguished from MGA1 by the absence of increase of 3-hydroxyisovaleric acid levels.
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