title: Urinary excretion of lactate, 2-oxoglutarate, citrate, and glycerol in patients with glycogenosis type I.
abstract: Growth retardation and lactic aciduria are well-known abnormalities in patients with a deficiency of either glucose-6-phosphatase or glucose-6-phosphate translocase. In 19 patients with glucose-6-phosphatase and two patients with glucose-6-phosphate translocase, growth retardation was quantified by calculating the height standard deviation score. The urinary excretion of lactate and some other metabolites was quantified by calculating the lactate/creatinine, 2-oxoglutarate/creatinine, citrate/creatinine, and glycerol/creatinine ratios in urine. Significant correlations were found between the lactate/creatinine ratio, the 2-oxoglutarate/creatinine ratio, and height SD score. Urinary lactate appeared to respond promptly to changes of the diet, while urinary 2-oxoglutarate responded only slowly, as did growth itself. The citrate/creatinine ratio and the glycerol/creatinine ratio were within the normal range and varied little. It was concluded that the urinary 2-oxoglutarate excretion primarily reflects the severity of the disease as expressed in stunted growth. Thus, while urinary lactate levels are more suitable for monitoring the diet, urinary 2-oxoglutarate levels can be used as an indication for intensive treatment with hyperalimentation.
authors.forename: J
authors.initials: J
authors.lastname: Fernandes
authors.forename: R
authors.initials: R
authors.lastname: Berger
mesh_terms: D000293:Adolescent; D001827:Body Height; D002648:Child; D002675:Child, Preschool; D002951:Citrates / Q000652:urine*; D019343:Citric Acid; D003404:Creatinine / Q000652:urine; D005990:Glycerol / Q000652:urine*; D005953:Glycogen Storage Disease Type I / Q000150:complications / Q000473:pathology / Q000652:urine*; D006130:Growth Disorders / Q000209:etiology; D006801:Humans; D007656:Ketoglutaric Acids / Q000652:urine*; D007773:Lactates / Q000652:urine*; D019344:Lactic Acid; D012016:Reference Values
chemical_list: D002951:Citrates; D007656:Ketoglutaric Acids; D007773:Lactates; D019343:Citric Acid; D019344:Lactic Acid; D003404:Creatinine; D005990:Glycerol