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A Korean female patient with thiamine-responsive pyruvate dehydrogenase complex deficiency due to a novel point mutation (Y161C)in the PDHA1 gene.

Authors
Lee, EH; Ahn, MS; Hwang, JS; Ryu, KH; Kim, SJ; Kim, SH
Citation
Journal of Korean medical science, 21(5):800-804, 2006
Journal Title
Journal of Korean medical science
ISSN
1011-89341598-6357
Abstract
Pyruvate dehydrogenase complex (PDHC) deficiency is mostly due to mutations in the X-linked E1alpha subunit gene (PDHA1). Some of the patients with PDHC deficiency showed clinical improvements with thiamine treatment. We report the results of biochemical and molecular analysis in a female patient with lactic acidemia. The PDHC activity was assayed at different concentrations of thiamine pyrophosphate (TPP). The PDHC activity showed null activity at low TPP concentration (1 x 10(-3) mM), but significantly increased at a high TPP concentration (1 mM). Sequencing analysis of PDHA1 gene of the patient revealed a substitution of cysteine for tyrosine at position 161 (Y161C). Thiamine treatment resulted in reduction of the patient's serum lactate concentration and dramatic clinical improvement. Biochemical, molecular, and clinical data suggest that this patient has a thiamine-responsive PDHC deficiency due to a novel mutation, Y161C. Therefore, to detect the thiamine responsiveness it is necessary to measure activities of PDHC not only at high but also at low concentration of TPP.
MeSH terms
Cells, CulturedFemaleHumansInfant, NewbornPoint Mutation*Pyruvate Dehydrogenase (Lipoamide)/genetics*Pyruvate Dehydrogenase Complex Deficiency Disease/drug therapyPyruvate Dehydrogenase Complex Deficiency Disease/genetics*Thiamine/therapeutic use*Thiamine Pyrophosphate/metabolism
DOI
10.3346/jkms.2006.21.5.800
PMID
17043409
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Pediatrics & Adolescent Medicine
AJOU Authors
황진순김성환
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