Effects of 4-methylpyrazole on ethanol neurobehavioral toxicity in CD-1 mice
| Autor: | Lawrence Quang, Ana Maria Páez, Mph Michael Shannon Md, Timothy J. Maher |
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| Rok vydání: | 2004 |
| Předmět: |
Male
medicine.medical_treatment Antidotes Pharmacology Motor Activity Placebos chemistry.chemical_compound Mice Alcohol-Induced Disorders Nervous System In vivo Reference Values Reflex Medicine Animals Prospective Studies Saline Postural Balance Alcohol dehydrogenase Fomepizole Ethanol biology Dose-Response Relationship Drug business.industry Antagonist General Medicine Metabolism In vitro Disease Models Animal chemistry Anesthesia Rotarod Performance Test Emergency Medicine biology.protein Pyrazoles Righting reflex business |
| Zdroj: | Academic emergency medicine : official journal of the Society for Academic Emergency Medicine. 11(8) |
| ISSN: | 1069-6563 |
| Popis: | Objectives: 4-Methylpyrazole (4-MP), an alcohol dehydrogenase (ADH) antagonist, is used for the treatment of ethylene glycol and methanol ingestions. However, ethanol is frequently coingested by those who ingest these more toxic alcohols. Several in vitro and in vivo studies have shown a decrease in the elimination rate of ethanol after the administration of 4-MP, but none has evaluated the effects of 4-MP administration on the neurobehavioral toxicity of ethanol. This was a study to determine whether ADH blockade with 4-MP prolongs ethanol neurobehavioral toxicity in a murine model. Methods:CD-1 mice were pretreated with 4-MP, with observation of its effect on ethanol dose–response curves. 4-MP (25 mg/kg) or an equal volume of saline was administered intraperitoneally. Ten minutes later, incremental ethanol doses of 1–5 g/kg were administered intraperitoneally. Pretreated and control groups were composed of ten mice each for each dose of ethanol tested. Outcomes for assessing ethanol neurobehavioral toxicity were successful performance on the rotarod test and presence of the righting reflex, two established and validated outcome measures for ethanol-induced neurobehavioral toxicity in mice. Results: The dose of ethanol at which 50% of the animals failed a particular outcome test (toxic dose 50 [TD50]) was decreased with 4-MP administration for both the rotarod test and the righting reflex. The TD50 intergroup differences (control vs. 4-MP) were statistically significant at 60, 120, and 180 minutes (p < 0.05). Conclusions: Pretreatment with 4-MP significantly prolonged ethanol neurobehavioral toxicity in CD-1 mice, presumably by inhibiting its metabolism by ADH. Further investigation is warranted to evaluate this interaction. |
| Databáze: | OpenAIRE |
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