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Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis

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Methods for assessing intestinal absorptive function in relation to enteral nutrition.

E S Debnam¹, G K Grimble

¹Department of Physiology, University College, London, UK. esdeb@rfc.ucl.ac.uk

Current Opinion in Clinical Nutrition and Metabolic Care

|September 25, 2001

Summary

Investigating intestinal impairment using physiological techniques reveals how the gut maintains nutrient absorption despite challenges. Understanding these mechanisms is key for improving nasoenteral nutrition support.

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Area of Science:

Gastroenterology and Physiology
Nutritional Science
Cell Biology

Background:

Nasoenteral nutrition success is limited by intestinal impairment, including reduced absorptive area, mucosal atrophy, abnormal motility, and diarrhea.
These factors hinder macronutrient and micronutrient absorption, complicating patient care.

Purpose of the Study:

To review how basic physiological and cell biology techniques can investigate intestinal pathophysiology affecting nutrient absorption.
To elucidate the control, function, and solute uptake roles of the sodium-glucose linked transporter.
To highlight the gut's adaptive capacity in maintaining digestive and absorptive functions.

Main Methods:

Classical intestinal perfusion methods.
Cell biology techniques including brush-border membrane vesicles, Caco-2 cells, mucosal immunohistochemistry, and gene expression probes.
Investigating the control of mucosal growth, transporter expression, and gut motility by lumenal nutrients.

Main Results:

Physiological techniques complement cell biology methods in assessing absorptive capacity.
The sodium-glucose linked transporter's role in glucose assimilation and other solute uptake is detailed.
The gut demonstrates significant ability to maintain function under diverse nutritional intakes and inflammatory conditions.

Conclusions:

Basic physiological and cell biology techniques are crucial for understanding intestinal impairment.
The gut possesses remarkable resilience and adaptability in nutrient assimilation.
These insights can inform strategies to optimize nasoenteral nutrition support.