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Safety of administration of human butyrylcholinesterase and its conjugates with soman or VX in rats.

Abstract：

:We evaluated the effects of conjugated enzyme-nerve agent product resulting from the inhibition of bioscavenger human serum butyrylcholinesterase (Hu BChE) by nerve agents soman or VX. Rats were trained on a multiple Fixed-Ratio 32, Extinction 30 sec. (FR32, Ext30) schedule of food reinforcement and then injected (i.m.) with Hu BChE (30 mg/kg), equivalent amounts of Hu BChE-soman conjugate (GDC), Hu BChE-VX conjugate, oxotremorine (OXO) (0.316 mg/kg) or vehicle (n = 8, each group). On the day of injection and on 10 subsequent daily sessions, performance was evaluated on the FR32, Ext30 schedule. Neither conjugates nor Hu BChE produced a performance deficit under the schedule. OXO produced a substantial decrease in responding on the day of administration, with complete recovery observed on subsequent sessions. None of the treatments affected circulating acetylcholinesterase (AChE) activity when evaluated 24-72 hr after injection. The dose of Hu BChE produced a 20,000-fold increase above baseline in circulating BChE activity. Pathological evaluation of organ systems approximately 2 weeks following administration of conjugates or Hu BChE alone did not show toxicity. Taken together, these results suggest that Hu BChE - nerve agent conjugates produced following bioscavenger protection against nerve agents soman and VX do not appear to be particularly toxic. These results add to the safety assessment of Hu BChE as a bioscavenger countermeasure against nerve agent exposure.

journal_name

Basic Clin Pharmacol Toxicol

journal_title

Basic & clinical pharmacology & toxicology

authors

Genovese RF,Sun W,Johnson CC,Ditargiani RC,Doctor BP,Saxena A

doi

10.1111/j.1742-7843.2009.00508.x

subject

Has Abstract

pub_date

2010-05-01 00:00:00

pages

428-34

issue

5

eissn

1742-7835

issn

1742-7843

pii

PTO508

journal_volume

106

pub_type

杂志文章

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