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Related Experiment Videos

Morphologic changes in the small intestine after chronic alcohol consumption.

J Persson1, N O Berg, K Sjölund

  • 1Dept. of Internal Medicine, University of Lund, Sweden.

Scandinavian Journal of Gastroenterology
|February 1, 1990
PubMed
Summary

Alcohol abuse damages small intestine lining, causing reduced villus height. Abstinence partially reverses this damage, but ultrastructural changes and bacterial adhesion persist. Serum zinc levels decrease, while copper levels increase.

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Area of Science:

  • Gastroenterology
  • Histopathology
  • Clinical Nutrition

Background:

  • Alcoholism is associated with gastrointestinal complications.
  • Small intestinal mucosal integrity may be compromised by chronic alcohol consumption.

Purpose of the Study:

  • To investigate the morphological and ultrastructural changes in the small intestinal mucosa of alcoholic patients.
  • To assess the impact of short-term abstinence on these mucosal changes.
  • To evaluate serum mineral levels and alcohol consumption markers.

Main Methods:

  • Biopsy of small intestinal mucosa from 11 alcoholic patients before and after 6 weeks of abstinence.
  • Histopathological examination using light microscopy, scanning electron microscopy, and immunohistochemistry.
  • Morphometric analysis of villus height and crypt depth.

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  • Biochemical analysis of serum zinc, copper, and carbohydrate-deficient transferrin.

    • Main Results:

    • A slight reduction in villus height relative to crypt depth was observed, with one case of subtotal villus atrophy.
    • Villus height increased in most patients after abstinence.
    • Pronounced ultrastructural alterations in enterocytes were noted, including bacterial adhesion in some cases, which persisted after abstinence.
    • Reduced serum zinc and elevated copper levels were found in alcoholic patients compared to teetotallers.
    • Carbohydrate-deficient transferrin proved to be a reliable marker of alcohol consumption.

    Conclusions:

    • Alcohol abuse leads to significant morphological and ultrastructural damage to the small intestinal mucosa.
    • Short-term abstinence can promote partial recovery of villus height but does not resolve persistent ultrastructural damage or bacterial adhesion.
    • Alcohol consumption affects serum zinc and copper homeostasis.
    • Carbohydrate-deficient transferrin is a valuable biomarker for assessing alcohol intake.