Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0026850 (muscular dystrophy)
 5,870 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

1. AMP, ADP, ATP, IMP, GDP, GTP and adenylosuccinate have been measured by high pressure liquid chromatography in three types of animal muscular dystrophy and in a human patient with Duchenne muscular dystrophy. 2. Abnormalities in nucleotide content varied from one dystrophy to another. 3. In each case, however, the ratio [total adenine nucleotide + IMP]/[total guanine nucleotides] was lower in dystrophic muscle, even when severely exercised or ischaemic muscles were used. 4. The practical advantages of this assay for diagnosis of muscular dystrophy are discussed.
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PMID:The purine nucleotide profile in mouse, chicken and human dystrophic muscle: an abnormal ratio of inosine plus adenine nucleotides to guanine nucleotides. 705 28

Adenylosuccinase catalyses two reactions in purine metabolism: the conversion of succinylaminoimidazole carboxamide ribotide (SAICAR) into aminoimidazole carboxamide ribotide (AICAR) along the de novo synthesis of purine nucleotides, and the conversion of adenylosuccinate (S-AMP) into AMP in the conversion of IMP into AMP. The hallmarks of adenylosuccinase deficiency are the presence of succinylaminoimidazole carboxamide riboside (SAICAriboside) and succinyladenosine (S-Ado) in body fluids. These normally undetectable succinylpurines are the products of the dephosphorylation, by cytosolic 5'-nucleotidase, of the two substrates of adenylosuccinase. The clinical picture of the enzyme deficiency is markedly heterogeneous with, as a rule, a profound, but nevertheless variable degree of psychomotor delay, often convulsions and/or autistic features, sometimes growth retardation and muscular dystrophy. The diagnostic tests that can be used for diagnosis, the enzyme and gene defects that have been identified, and the hypotheses that have been put forward to explain the pathophysiology of the disorder are reviewed.
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PMID:Inborn errors of the purine nucleotide cycle: adenylosuccinase deficiency. 921 Nov 92