Mechanism of organophosphates (nerve gases and pesticides) and antidotes: electron transfer and oxidative stress.

Abstract:

:Evidence indicates that nerve gas toxins operate in ways in addition to inhibition of acetylcholine esterase. Alternative bioactivities are discussed with focus on electron transfer. The main class, including pralidoxime (2-PAM), incorporates conjugated iminium and oxime moieties that are electron affinic. Various physiological properties of iminium and oxime species are reviewed. The organophosphates encompass both nerve gases and insecticides, possessing similar properties, but different activities. Toxic manifestations are apparently due, in part, to oxidative stress. Alkylation of DNA takes place which may lead to generation of reactive oxygen species. Structure-activity relationships are examined, including reduction potentials and the captodative effect.

journal_name

Curr Med Chem

authors

Kovacic P

doi

10.2174/0929867033456314

subject

Has Abstract

pub_date

2003-12-01 00:00:00

pages

2705-9

issue

24

eissn

0929-8673

issn

1875-533X

journal_volume

10

pub_type

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