Pediatr Res. 1990 Jan;27(1):75-9.

Effect of lipoic acid in a patient with defective activity of pyruvate dehydrogenase, 2-oxoglutarate dehydrogenase, and branched-chain keto acid dehydrogenase.

Yoshida I, Sweetman L, Kulovich S, Nyhan WL, Robinson BH.

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Department of Pediatrics and Child Health, Kurume University, Japan.

Abstract

Lactic acidosis and accumulation of 3-hydroxybutyrate and other citric acid cycle intermediates were found in an infant with a lethal syndrome of metabolic acidosis and renal tubular acidosis. Nevertheless, the patient was relatively well for 4 mo of life. The activity of the pyruvate dehydrogenase complex, 2-oxoglutarate dehydrogenase, and branched-chain keto acid dehydrogenase were all reduced to levels 9 to 29% of control. In contrast, the activity of lipoamide dehydrogenase was normal. The conversion of 1-14C-leucine and 1-14C-valine to 14CO2 and of U-L-14C-valine to its major metabolic product 3-hydroxyisobutyric acid by fibroblasts derived from the patient was less than 5% of control. Cultivation of the patient's fibroblasts in medium enriched with lipoic acid markedly improved these in vitro conversions of leucine and valine.

PMID:: 2104971; [PubMed - indexed for MEDLINE]

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