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Changes in intestinal transit and absorption during endotoxemia are dose dependent
J J Cullen1, R C Doty, K S Ephgrave
1Surgical Service, Veterans Administration Medical Center, Iowa City, USA.
The Journal of Surgical Research
|January 16, 1999
Summary
Endotoxemia, caused by bacterial toxins, alters intestinal function. Higher doses of endotoxin lead to more significant changes in jejunal absorption and transit, independent of vital signs.
Area of Science:
- Gastroenterology
- Physiology
- Pharmacology
Background:
- Septic patients often experience feeding intolerance due to motility and absorption issues.
- Endotoxemia is known to accelerate intestinal transit and reduce jejunal absorption.
- Previous research indicated endotoxemia impacts jejunal function.
Purpose of the Study:
- To investigate the dose-dependent effects of endotoxin on jejunal transit and absorption.
- To determine if endotoxin's impact on jejunal function is related to changes in blood pressure or heart rate.
Main Methods:
- Rats with jejunal Thiry-Vella loops were used.
- Baseline measurements of absorption and transit were recorded.
- Rats received either saline or varying doses of Escherichia coli lipopolysaccharide.
Main Results:
- Endotoxin administration resulted in a dose-dependent increase in intestinal transit speed.
- Water and glucose absorption were decreased by endotoxin in a dose-dependent manner.
- Potassium flux increased with higher endotoxin doses.
Conclusions:
- Endotoxemia causes dose-dependent alterations in jejunal absorptive and motor functions.
- These effects are not mediated by changes in blood pressure or heart rate.
- Understanding these dose-dependent effects is crucial for managing septic patients.