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Gut barrier function in malnourished patients

F K Welsh1, S M Farmery, K MacLennan

  • 1Department of Pathology, St James's University Hospital, Leeds, United Kingdom.

Gut
|May 13, 1998
PubMed
Summary
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Malnutrition significantly impairs intestinal barrier function, increasing permeability and inflammation. This compromise in gut integrity in malnourished patients warrants further investigation into its clinical implications.

Area of Science:

  • Gastroenterology
  • Immunology
  • Critical Care Medicine

Background:

  • Gastrointestinal mucosal integrity is crucial for preventing systemic absorption of toxins and bacteria.
  • Gut barrier dysfunction in critically ill patients can exacerbate sepsis.
  • The impact of malnutrition on human intestinal barrier function remains largely unknown.

Purpose of the Study:

  • To quantify intestinal barrier function in malnourished patients.
  • To assess endotoxin exposure in malnourished individuals.
  • To evaluate the acute phase cytokine response in the context of malnutrition.

Main Methods:

  • Lactulose:mannitol test to measure gastrointestinal permeability.
  • Endoscopic biopsies for morphological and immunohistochemical analysis.

Related Experiment Videos

  • Polymerase chain reaction for mucosal cytokine expression and ELISA for endotoxin and interleukin-6 response.

    • Main Results:

    • Malnourished patients exhibited significantly increased intestinal permeability.
    • Evidence of activated lamina propria mononuclear cells and enterocytes was observed.
    • A heightened acute phase response was detected in malnourished individuals.

    Conclusions:

    • Intestinal barrier function is demonstrably compromised in malnourished patients.
    • The precise clinical significance of this compromised barrier function requires further elucidation.