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Related Experiment Videos

Late-onset muscle phosphofructokinase deficiency.

M J Danon1, S Servidei, S DiMauro

  • 1Department of Neurology, University of Illinois College of Medicine, Chicago 60612.

Neurology
|June 1, 1988
PubMed
Summary

Muscle phosphofructokinase (PFK) deficiency causes slow limb weakness. This genetic disorder, a chronic myopathic variant, is inherited in an autosomal recessive pattern.

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Area of Science:

  • Biochemistry
  • Genetics
  • Neurology

Background:

  • Muscle phosphofructokinase (PFK) deficiency is a rare metabolic disorder.
  • It can present with various clinical manifestations, including muscle weakness.

Observation:

  • A 75-year-old man presented with a decade of progressive limb weakness.
  • He had no history of cramps or myoglobinuria.
  • Clinical, morphologic, and biochemical analyses confirmed muscle PFK deficiency.

Findings:

  • Erythrocyte PFK activity in the patient's asymptomatic daughter was 63% of normal, suggesting a carrier state.
  • The chronic myopathic variant of muscle PFK deficiency is likely inherited as an autosomal recessive trait.
  • A distinct genetic defect may underlie this specific variant.

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Implications:

  • This study identifies a specific genetic defect causing a chronic myopathic variant of muscle PFK deficiency.
  • Understanding the genetic basis aids in diagnosing and counseling families.
  • Further research into the distinct genetic defect is warranted for potential therapeutic strategies.