4-Hydroxybutyric aciduria

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Z Rahbeeni1, P T Ozand, M Rashed

  • 1Department of Pediatrics, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.

Brain & Development
|November 1, 1994
PubMed

Insights

4-hydroxybutyric aciduria is a rare genetic disorder causing severe developmental delay and seizures in infants. Vigabatrine treatment reduced acid levels but showed limited clinical improvement in most patients.

Area of Science:

  • Biochemistry
  • Genetics
  • Neurology

Background:

  • 4-hydroxybutyric aciduria is a rare metabolic disorder.
  • Characterized by severe neurological impairment in infancy.

Observation:

  • Six patients from three families presented with global delay, hypotonia, and seizures.
  • Ocular manifestations included optic atrophy and retinitis pigmentosa.
  • Movement disorders such as choreoathetosis, myoclonus, and dystonia were observed.

Findings:

  • Markedly elevated urinary 4-hydroxybutyric acid (300-1000x normal).
  • Associated increases in related organic acids affecting metabolism and beta-oxidation.
  • Vigabatrine therapy rapidly decreased 4-hydroxybutyric acid excretion (80-200x normal).

Implications:

  • Vigabatrine effectively reduces 4-hydroxybutyric acid levels.
  • Clinical outcomes varied, with only partial improvement in some patients.
  • Further research is needed to understand the disease's complex pathophysiology and treatment responses.

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