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[Myogenic hyperuricemia]

T Yamasaki1, T Hamaguchi, H Nakajima

  • 1Second Department of Internal Medicine, Osaka University Medical School.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|December 1, 1996
PubMed
Summary
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Myogenic hyperuricemia, linked to muscle glycogen storage diseases (GSDs), results from excessive uric acid production during exercise due to impaired muscle ATP production. This leads to overproduction of AMP and subsequent release of purine metabolites from affected muscles.

Area of Science:

  • Biochemistry
  • Metabolic disorders
  • Exercise physiology

Context:

  • Myogenic hyperuricemia is a condition characterized by elevated uric acid levels originating from muscle tissue.
  • It is commonly observed in patients with specific types of muscle glycogen storage diseases (GSDs), including types III, V, and VII.
  • These GSDs involve defects in muscle energy metabolism, particularly in adenosine triphosphate (ATP) production.

Purpose:

  • To elucidate the biochemical mechanisms underlying myogenic hyperuricemia in muscle glycogen storage diseases.
  • To connect the molecular lesions in GSDs to the observed overproduction of uric acid.
  • To review the relationship between specific GSD mutations and the manifestation of myogenic hyperuricemia.

Summary:

  • Myogenic hyperuricemia arises from the excessive degradation of purine derivatives within exercising muscles.

Related Experiment Videos

  • Impaired muscle ATP production in GSD types III, V, and VII leads to overproduction of adenosine monophosphate (AMP).
  • This metabolic disturbance results in the excessive release of inosine and hypoxanthine from the muscle, contributing to hyperuricemia.

    • Impact:

    • Provides a deeper understanding of the metabolic consequences of muscle glycogen storage diseases.
    • Highlights the link between genetic defects in muscle metabolism and systemic conditions like hyperuricemia.
    • Informs potential diagnostic or therapeutic strategies for patients with GSDs and associated hyperuricemia.