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Effect of vitamin B/sub 6/ on the neurotoxicity and pharmacology of desmethylmisonidazole and misonidazole: clinical and laboratory studies

Conference · · Int. J. Radiat. Oncol., Biol. Phys.; (United States)
OSTI ID:6499997
The clinical usefulness of misonidazole (MISO) and desmethylmisonidazole (DMM) is severely limited by neurotoxicity. Based on theoretical considerations and on laboratory data suggesting that pyridoxine (PN) decreased MISO toxicity in mice. The authors attempted to ameliorate the clinical neuropathy of DMM using oral PN. Pharmacokinetic analysis suggested interaction of PN and DMM but no protection against neuropathy was observed. Serial experiments with C3H and BALB/c mice were done using various forms of vitamin B/sub 6/ (PN, pyridoxal, pyridoxal phosphate) administered orally and i.p. No consistent protection was observed. Dexamethasone did not alter MISO toxicity in mice, contrary to the clinical findings. They conclude that vitamin B/sub 6/ is not useful in preventing clinical neurotoxicity of MISO or DMM.
Research Organization:
Stanford Univ. Medical Center, CA
OSTI ID:
6499997
Conference Information:
Journal Name: Int. J. Radiat. Oncol., Biol. Phys.; (United States) Journal Volume: 10:8
Country of Publication:
United States
Language:
English