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Inhibition of glycolytic enzymes by endogenous aldehydes: a possible relation to diabetic neuropathies
Authors:Milos V Novotny  Mark F Yancey  Robert Stuart  Donald Wiesler  Richard G Peterson
Institution:Department of Chemistry, Indiana University, Bloomington, IN 47405, USA
Abstract:Endogenous saturated and unsaturated aldehydes were found in significant elevations in serum of diabetic humans and rats. These compounds, originating from the lipid peroxidation processes, are shown here to be potent inhibitors of the glycolytic enzymes, phosphofructokinase and glyceraldehyde-3-phosphate dehydrogenase. The inhibition process is non-competitive and progressive. The aldehyde mixture, when supplemented to the standard rat diet at 1100 ratio, caused nerve damage that is reminiscent of diabetic polyneuropathies.
Keywords:Neurotoxicity  Endogenous aldehyde  Glycolytic enzyme  2  5-HD  2  5-hexanedione  ATP  adenosine-5′-triphosphate  DTT  dithiothreitol  GAPDH  glyceraldehyde-3-phosphate dehydrogenase  LC  liquid chromatography  LDH  lactate dehydrogenase  nicotine adeninedinucleotide (reduced and oxidized forms)  PFK  phosphofructokinase  Tris  tris(hydroxymethyl)aminomethane
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