Protection of human muscle acetylcholinesterase from soman by pyridostigmine bromide.

Abstract:

INTRODUCTION:Pretreatment with pyridostigmine bromide (PB) of human intercostal muscle fibers exposed to the irreversible acetylcholinesterase (AChE) inhibitor soman was investigated. METHODS:Muscles were pretreated with 3 × 10(-6) M PB or saline for 20 minutes, then exposed to 10(-7) M soman for 10 minutes. RESULTS:AChE of muscles treated with soman alone was inhibited >95%. In contrast, PB pretreatment of soman-exposed bundles protected 20% of AChE activity. AChE of bundles exposed to PB alone recovered after 4 hours, but bundles exposed to both PB and soman did not. Soman-induced reduction of resting membrane potentials and increment of amplitudes and decay times of miniature endplate potentials (MEPPs) were partially corrected by PB pretreatment. CONCLUSIONS:In vitro pretreatment of human muscles with PB protected up to 20% of muscle AChE and ameliorated some deleterious effects on endplate physiology induced by soman.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Maselli RA,Henderson JD,Ng J,Follette D,Graves G,Wilson BW

doi

10.1002/mus.21922

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

591-5

issue

4

eissn

0148-639X

issn

1097-4598

journal_volume

43

pub_type

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