Brain acetylcholinesterase diurnal variations during the rapid development of tolerance to the hypothermic effect of ethanol

Conference · Mon Mar 11 00:00:00 EST 1991 · FASEB Journal (Federation of American Societies for Experimental Biology); (United States)

OSTI ID:5863509

Wang, O; Soliman, K F.A. ^[1]

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1. Florida A and M Univ., Tallahassee (United States)

Male Sprague-Dawley rats maintained under controlled environmental conditions were used. Acetylcholinesterase (AChE) activity was determined in the cerebral cortex, midbrain, hypothalamus, hippocampus, cerebellum, pons and medulla oblongata of saline control and ethanol-treated rats, either after a single dose at 06:0 or 18:00h, or after a second dose administered 24 hrs later at the same time scheduled. Results of this experiment indicate that repeated administration with ethanol was associated with the rapid development of tolerance to the hypothermic action of ethanol. A single injection of ethanol at 0600h resulted in a significant decrease in AChE activity in the hypothalamus, medulla, cerebellum, hippocampus and the cortex. However, ethanol administration at 18.00h was associated with significant increases in AChE activity in the same brain regions. The repeated administration of ethanol at 06.00h was associated with tolerance in AChE response to ethanol in the hypothalamus and hippocampus. However, there was no tolerance development in AChE activity in brain regions when ethanol was administered at 18.00h. The results indicate that chronotolerance to ethanol might be related to the brain cholinergic system.

• OSTI ID: 5863509
• Report Number(s): CONF-9104107-; CODEN: FAJOE
• Journal Information: FASEB Journal (Federation of American Societies for Experimental Biology); (United States), Vol. 5:4; Conference: 75. annual meeting of the Federation of American Societies for Experimental Biology (FASEB), Atlanta, GA (United States), 21-25 Apr 1991; ISSN 0892-6638
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
CHOLINESTERASE
ENZYME ACTIVITY
ETHANOL
BIOLOGICAL EFFECTS
BRAIN
DAILY VARIATIONS
METABOLISM
RATS
ALCOHOLS
ANIMALS
BODY
CARBOXYLESTERASES
CENTRAL NERVOUS SYSTEM
ENZYMES
ESTERASES
HYDROLASES
HYDROXY COMPOUNDS
MAMMALS
NERVOUS SYSTEM
ORGANIC COMPOUNDS
ORGANS
PROTEINS
RODENTS
VARIATIONS
VERTEBRATES
560300* - Chemicals Metabolism & Toxicology