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- W1963843762 abstract "The anticancer agent 3-aminopyridine-2-carboxaldehyde thiosemicarbazone is a ribonucleotide reductase inhibitor. It inactivates ribonucleotide reductase by disrupting an iron-stabilized radical in ribonucleotide reductase’s small subunits, M2 and M2b (p53R2). Unfortunately, 3-aminopyridine-2-carboxaldehyde thiosemicarbazone also alters iron II (Fe 2+ ) in hemoglobin. This creates Fe 3+ methemoglobin that does not deliver oxygen. Fe 2+ in hemoglobin normally auto-oxidizes to inactive Fe 3+ methemoglobin at a rate of nearly 3% per day and this is counterbalanced by a reductase system that normally limits methemoglobin concentrations to less than 1% of hemoglobin. This balance may be perturbed by symptomatic toxicity levels during 3-aminopyridine-2-carboxaldehyde thiosemicarbazone therapy. Indications of 3-aminopyridine-2-carboxaldehyde thiosemicarbazone sequelae attributable to methemoglobinemia include resting dyspnea, headaches and altered cognition. Management of methemoglobinemia includes supplemental oxygen, ascorbate and, most importantly, intravenously administered methylene blue as a therapeutic antidote." @default.
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- W1963843762 date "2012-02-01" @default.
- W1963843762 modified "2023-10-15" @default.
- W1963843762 title "Management of 3-aminopyridine-2-carboxaldehyde thiosemicarbazone-induced methemoglobinemia" @default.
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- W1963843762 doi "https://doi.org/10.2217/fon.11.147" @default.
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