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3-Hydroxyisobutyric aciduria in two brothers
1Department of Child Neurology, National Center Hospital for Mental, Nervous, and Muscular Disorders, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.
Pediatric Neurology
|May 6, 1998
Summary
Two brothers with 3-hydroxyisobutyric aciduria (3HiB-uria) experienced severe ketoacidosis. Protein restriction effectively prevented episodes, while carnitine therapy showed limited benefit in managing this rare metabolic disorder.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- 3-hydroxyisobutyric aciduria (3HiB-uria) is a rare metabolic disorder.
- Affected individuals can experience life-threatening ketoacidotic episodes.
Observation:
- Two Japanese brothers presented with recurrent ketoacidosis.
- The elder brother died at age 4; the younger brother showed similar symptoms after age 1.
Findings:
- 3HiB-uria was diagnosed using gas chromatography/mass spectrometry.
- Magnetic resonance imaging revealed white matter abnormalities.
- Protein restriction was effective in preventing ketoacidotic episodes.
Implications:
- Dietary protein restriction is a key therapeutic strategy for 3HiB-uria.
- Carnitine supplementation may have limited efficacy in managing this condition.
- Further research is needed to understand the pathophysiology and long-term outcomes of 3HiB-uria.