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- W642310969 abstract "One of the shortcomings of current treatment of nerve agent poisoning is that oximes hardly penetrate the blood brain barrier (BBB), whereas nerve agents easily do. Enhancing the efficacy of current oximes in the brain, would therefore provide an attractive approach to improve medical countermeasures. An explanation for limited penetration might be that oximes are substrate of naturally occurring P-glycoprotein (Pgp) efflux pumps located at the BBB. Using quantitative brain microdialysis in rats, the effect of i.v. injected Tariquidar, a non-competitive, specific Pgp-inhibitor, on HI-6 levels in blood and brain was investigated. It appeared that Tariquidar enhanced HI-6 levels in the brain approximately 2-fold during the first hour after HI-6 administration, whereas plasma levels did not differ between the treatment groups. A subsequent proof-of-concept study in rats showed that soman-induced seizures and convulsions were prevented almost completely when they were, in addition to HI-6 and atropine, pretreated with Tariquidar. Moreover, twice as much AChE activity was present in their brains as compared to control rats. These results indicate that modulation of the BBB by a drug like Tariquidar, which is non-toxic by itself, is of great value in enhancing the efficacy of oximes." @default.
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- W642310969 date "2012-01-01" @default.
- W642310969 modified "2023-09-27" @default.
- W642310969 title "The effect of blood brain barrier modulation on oxime efficacy in nerve agent poisoning (Abstract)" @default.
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