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Antidotal Action of Some Gold(I) Complexes toward Phosphine Toxicity

Thursday 9/5 11:00AM - 12:00PM
4140 Public Health, Young Seminar Room

Presenter: Kimberly Garrett

Paper: Antidotal Action of Some Gold(I) Complexes toward Phosphine Toxicity

Authors: Kimberly K. Garrett, Kristin L. Frawley, Samantha Carpenter Totoni, Yookyung Bae, Jim Peterson, and Linda L. Pearce

Abstract: Phosphine (PH3) poisoning continues to be a serious problem worldwide, for which there is no antidote currently available. An invertebrate model for examining potential toxicants and their putative antidotes has been used to determine if a strategy of using Au(I) complexes as phosphinescavenging compounds may be antidotally beneficial. When Galleria mellonella larvae (or wax worms) were subjected to phosphine exposures of 4300 (±700) ppm·min over a 20 min time span, they became immobile (paralyzed) for ∼35 min. The administration of Au(I) complexes auro-sodium bisthiosulfate (AuTS), aurothioglucose (AuTG), and sodium aurothiomalate (AuTM) 5 min prior to phosphine exposure resulted in a drastic reduction in the recovery time (0−4 min). When the putative antidotes were given 10 min after the phosphine exposure, all the antidotes were therapeutic, resulting in mean recovery times of 14, 17, and 19 min for AuTS, AuTG, and AuTM, respectively. Since AuTS proved to be the best therapeutic agent in the G. mellonella model, it was subsequently tested in mice using a behavioral assessment (pole-climbing test). Mice given AuTS (50 mg/kg) 5 min prior to a 3200 (±500) ppm·min phosphine exposure exhibited behavior comparable to mice not exposed to phosphine. However, when mice were given a therapeutic dose of AuTS

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Last Updated On Friday, August 30, 2019 by Orbell, Adam W
Created On Friday, August 30, 2019

JunJuly 2020Aug

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