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- W2009144476 abstract "Pyrithiamine-induced thiamin deficiency has been used in rat as an experimental form of Wernicke-Korsakoff encephalopathy, a disease associated with chronic alcoholism. Although the main etiological factor is known to be the lack of thiamin, the biochemical mechanisms involved in the pathogenesis remain unclear. Thiamin-dependent enzymes were studied in brain mitochondria: alpha-ketoglutarate dehydrogenase activity exhibited 40% reduction, whereas pyruvate dehydrogenase did not change significantly. Polarographic recordings of mitochondrial respiration revealed a decreased State 3, when using pyruvate/malate, alpha-ketoglutarate or glutamine as a substrate, but the respiration rates remained unchanged with glutamate or succinate. This fall in pyruvate oxidation may be due to the impairment of alpha-ketoglutarate dehydrogenase, which follows pyruvate dehydrogenase in the metabolic pathway. A time course of lactate concentration showed dramatic increases in thalamus, mid brain, hypothalamus and colliculli, consistent with the anatomopathological findings. No increases were found before the onset of neurological symptoms." @default.
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- W2009144476 date "1996-11-01" @default.
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- W2009144476 title "Brain pyruvate oxidation in experimental thiamin-deficiency encephalopathy" @default.
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- W2009144476 doi "https://doi.org/10.1016/0009-8981(96)06385-1" @default.
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