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Glycerol kinase deficiency: follow-up during 20 years, genetics, biochemistry and prognosis.
Umeå University, Faculty of Medicine, Clinical Sciences, Paediatrics.
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2004 (English)In: Acta Paediatrica, ISSN 0803-5253, Vol. 93, no 7, 911-21 p.Article in journal (Refereed) Published
Abstract [en]

Departments of Clinical Chemistry and Transfusion Medicine, Sahlgrenska University Hospital, Göteborg University, Gothenburg, Sweden. Christina.Hellerud@clinchem.gu.se

AIM: To follow two children with isolated glycerol kinase deficiency (GKD) with severe symptoms into adulthood. METHODS: The patients were followed during approximately 20 y and interviewed about symptoms, diet and physical activity. Fasting provocations, bicycle ergometer tests, dietary registrations, enzyme and mutation analysis were performed by standard protocols. RESULTS: The activity of glycerol kinase (GK) in fibroblasts was <10% of reference. One case had a deletion of exon 17, the other a mutation in exon 7 of the GK gene (601 A-->G). Both mothers were heterozygotes. Two maternal male cousins in one of the families were hemizygotes without symptoms. Tests performed in childhood documented pronounced sensitivity to fasting and physical exercise, whereas such tests at 23 and 31 y of age were essentially normal but with pronounced ketonaemia. After puberty, the boys had no hypoglycaemic symptoms and now report no problems with their condition; thus, their phenotype has changed over time. CONCLUSION: The greater importance of glycerol as a gluconeogenetic substrate in children than in adults may explain the episodes in young patients with GKD, often elicited by catabolic stress. With meals at frequent intervals, access to glucose and avoidance of strenuous sports, the prognosis is good for a normal adult life of a young child with isolated GKD and symptoms of hypoglycaemia.

Place, publisher, year, edition, pages
2004. Vol. 93, no 7, 911-21 p.
Keyword [en]
Acetoacetates/urine, Adult, Child, Child; Preschool, Exons/genetics, Female, Follow-Up Studies, Genotype, Glycerol/blood/*urine, Glycerol Kinase/*deficiency/genetics/metabolism, Heterozygote, Humans, Male, Mutation, Pedigree, Phenotype, Prognosis
Identifiers
URN: urn:nbn:se:umu:diva-6901DOI: doi:10.1111/j.1651-2227.2004.tb02689.xPubMedID: 15303806OAI: oai:DiVA.org:umu-6901DiVA: diva2:146571
Available from: 2008-01-09 Created: 2008-01-09 Last updated: 2011-01-12Bibliographically approved

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