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Citrate treatment in a patient with pyruvate decarboxylase deficiency
Insights
A rare genetic disorder caused a child to experience severe neurological symptoms. Treatment with citrate showed promise in managing this pyruvate decarboxylase deficiency.
Area of Science:
- Biochemistry
- Genetics
- Pediatrics
Background:
- Pyruvate decarboxylase (PDC) deficiency is a rare inherited metabolic disorder affecting the brain's energy production.
- This condition can lead to severe neurological impairment and developmental delays.
Observation:
- A 5-year-old boy presented with recurrent episodes of lethargy, vomiting, and ataxia.
- Elevated blood and cerebrospinal fluid pyruvate levels were noted during symptomatic periods.
- Blood pyruvate remained elevated even between attacks.
Findings:
- Enzyme assays confirmed a deficiency in pyruvate decarboxylase in the patient's leukocytes and skin fibroblasts.
- Thiamine supplementation did not restore enzyme activity, suggesting a non-thiamine-responsive form of the deficiency.
- Oral citrate administration appeared to be the most effective therapeutic intervention, significantly reducing attack severity.
Implications:
- This case highlights the clinical variability and diagnostic challenges of pyruvate decarboxylase deficiency.
- Citrate supplementation may represent a viable therapeutic strategy for managing symptoms in patients with this disorder.
- Further research into novel therapeutic approaches for PDC deficiency is warranted.
Abstract:
A 5-year old boy with intermittent sopor, severe vomiting and ataxia since 2 1/2 years old was described. During attack period the patient showed elevation of blood pyruvate and alanine and also cerebrospinal-fluid pyruvate, whereas during the time free from attack only blood pyruvate was increased. Deficiency of pyruvate decarboxylase was found in patient's leukocyte and in cultured skin fibroblasts. Addition of thiamine in assay medium did not correct the enzyme activity. Oral administration of citrate seemed to be most effective and during the treatment only a mild attack was once observed.