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High blood endotoxin does not affect ethanol elimination in rats
T Nosova1, K Jokelainen, H A Järveläinen
1Research Unit of Alcohol Diseases, Helsinki University Central Hospital, Finland.
Alcohol and Alcoholism (Oxford, Oxfordshire)
|November 12, 1998
Summary
Chronic alcohol consumption speeds up ethanol elimination. However, this study found that elevated endotoxin levels, even with mild liver changes, did not affect ethanol metabolism rates in rats.
Area of Science:
- Pharmacology and Toxicology
- Gastroenterology and Hepatology
Background:
- Chronic alcohol intake is associated with enhanced ethanol elimination.
- Gut-derived endotoxins are hypothesized to mediate this enhanced ethanol metabolism.
Purpose of the Study:
- To investigate the effect of chronically elevated blood-endotoxin levels on ethanol elimination rates.
- To determine if endotoxins play a role in the accelerated ethanol metabolism observed after chronic alcohol consumption.
Main Methods:
- Rats were fed ethanol via a liquid diet, with some receiving chronic endotoxin administration via osmotic minipump.
- Ethanol elimination rates were measured after an acute ethanol challenge in control, ethanol-fed, and endotoxin-treated groups.
- Blood-endotoxin levels and hepatic changes were assessed.
Main Results:
- Chronically ethanol-fed rats exhibited significantly faster ethanol elimination compared to pair-fed controls.
- Chronic endotoxin administration elevated blood-endotoxin levels but did not alter ethanol elimination rates in either control or ethanol-fed rats.
- Endotoxin exposure resulted in only mild hepatic changes.
Conclusions:
- Chronic endotoxin exposure, at levels causing mild liver changes, does not affect the rate of ethanol elimination.
- Endotoxins are unlikely to be the mediators responsible for the enhanced ethanol elimination rate following chronic alcohol administration.