Related Experiment Videos
[Glucose elevates the permeability of microcirculation vessels]
M von Ardenne1, P G Reitnauer, C Hentschel
1Forschungsinstitut Manfred von Ardenne, Dresden, DDR.
Biomedica Biochimica Acta
|January 1, 1990
Summary
High glucose levels increase intestinal permeability by shrinking endothelial cells and opening junctions, as shown by Evans' Blue dye extravasation in rats. This impacts nutrient absorption and drug delivery.
Area of Science:
- Physiology
- Gastroenterology
- Pharmacology
Context:
- Intestinal permeability is crucial for nutrient absorption and drug delivery.
- Endothelial cell function plays a key role in regulating intestinal barrier integrity.
- Hyperglycemia is a common condition with potential impacts on gastrointestinal function.
Purpose:
- To investigate the effect of glucose on intestinal permeability.
- To elucidate the mechanism by which glucose influences endothelial cell junctions.
- To quantify the increase in albumin-bound dye extravasation under varying glucose concentrations.
Summary:
- An experimental setup measured Evans' Blue dye extravasation in rat intestinal loops immersed in buffer.
- Intravenous glucose administration (2-6 g/kg/h) significantly increased albumin-bound dye permeation by 1.9 to 3.1 fold.
- The proposed mechanism involves osmotic shrinkage of endothelial cells, leading to opened intercellular junctions.
Impact:
- Findings suggest hyperglycemia can compromise intestinal barrier function.
- This increased permeability may affect the absorption of nutrients and the efficacy of orally administered drugs.
- Understanding these mechanisms can inform therapeutic strategies for managing hyperglycemia-related gastrointestinal complications.