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Related Experiment Videos

[Non-ketotic hyperglycinemia]

R Kálmánchey1, L Szücs, K Majtényi

  • 1Semmelweis OTE II, Gyermekklinika.

Orvosi Hetilap
|January 29, 1995
PubMed
Summary
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Non-ketotic hyperglycinaemia (NKH) in three children is detailed. NMDA-antagonist drugs improved clinical outcomes in two patients, suggesting a potential therapeutic avenue for this rare metabolic disorder.

Area of Science:

  • Biochemistry
  • Neurology
  • Pediatrics

Background:

  • Non-ketotic hyperglycinaemia (NKH) is a rare inherited metabolic disorder.
  • NKH is characterized by elevated glycine levels in plasma and cerebrospinal fluid.
  • The neonatal form presents with severe neurological symptoms.

Observation:

  • Three pediatric cases of NKH are presented, including two typical neonatal forms and one atypical form.
  • One patient with the typical neonatal form experienced mortality, with post-mortem findings of agenesis of the corpus callosum and diffuse hypomyelination.
  • Two children treated with N-methyl-D-aspartate (NMDA)-antagonist drugs showed significant clinical improvement.

Findings:

  • NMDA-antagonist therapy demonstrated a positive impact on the clinical condition of NKH patients.

Related Experiment Videos

  • Neuropathological examination in a deceased patient revealed structural brain abnormalities consistent with severe NKH.
  • The study highlights the heterogeneity in clinical presentation and outcomes of NKH.

    • Implications:

    • NMDA-antagonist drugs represent a promising therapeutic strategy for non-ketotic hyperglycinaemia.
    • Early diagnosis and intervention may be crucial for improving outcomes in NKH.
    • Further research into the pathophysiology and treatment of NKH is warranted.