Record Display for the EPA National Library Catalog

RECORD NUMBER: 46 OF 95

OLS Field Name OLS Field Data
Main Title Muscarinic Cholinergic Receptor Regulation and Acetylcholinesterase Inhibition in Response to Insecticide Exposure during Development.
Author Dvergsten, C. ; Meeker, R. B. ;
CORP Author North Carolina Univ. at Chapel Hill. Dept. of Neurology.;Health Effects Research Lab., Research Triangle Park, NC. Neurotoxicology Div.
Publisher cJul 94
Year Published 1994
Report Number EPA/600/J-94/515;
Stock Number PB95-148771
Additional Subjects Parathion ; Acetylcholine ; Muscarinic regulators ; Rats ; Cholinesterase inhibitors ; Brain ; Dose-response relationships ; Developmental biology ; Enzymes ; Thiophosphoric acid esters ; Exposure ; Receptor sites(Physiology) ; Hippocampus ; Cerebral cortex ; Reprints ; Parathion ; Organophosphorous pesticides
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB95-148771 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/06/1995
Collation 15p
Abstract
Daily injections of low doses of the organophosphorus pesticide, parathion, into neonatal rats during the rapid phase of cholinergic system development (postnatal days 8-20), resulted in an average 67% inhibition of acetylcholinesterase and a 23% down regulation of muscarinic cholinergic receptors on postnatal day 21. A correlation of 0.78 was found between the level of acetylcholinesterase inhibition and the decrease of muscarinic receptors. Regional analyses of receptor autoradiograms indicated that muscarinic receptors in the cortex and hippocampus were most sensitive to the effects of acetylcholinesterase inhibition. The anterior thalamus was notable in having a high density of cholinertic receptors which were relatively unaffected by parathion treatment.