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Glutamine and the bowel.

P J Reeds1, D G Burrin

  • 1Department of Animal Sciences, University of Illinois, Urbana, IL 61801, USA. preeds@uiuc.edu

The Journal of Nutrition
|September 5, 2001
PubMed
Summary
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Glutamine supports intestinal mucosal function, but its exact role and clinical benefits remain unclear. Research suggests it may regulate cell processes rather than solely through metabolism.

Area of Science:

  • Gastroenterology
  • Cell Biology
  • Biochemistry

Background:

  • The importance of glutamine for intestinal mucosal metabolism is established.
  • However, the precise mechanisms behind glutamine's function in the gut are not fully understood.

Purpose of the Study:

  • To investigate whether glutamine is essential for intestinal function.
  • To determine the relationship between glutamine's role and its intermediary metabolism.
  • To assess the clinical and metabolic benefits of glutamine supplementation.

Main Methods:

  • Review of existing biochemical and physiological evidence.
  • Analysis of glutamine's utilization and synthesis by intestinal tissues.
  • Examination of glutamine's effect on mucosal cell proliferation, differentiation, and gene expression.

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Main Results:

  • Evidence suggests systemic glutamine supports intestinal mucosal function.
  • Glutamine's role appears independent of its intermediary metabolism in the gut.
  • Intestinal cells both utilize and synthesize glutamine, indicating a regulatory function.
  • Glutamine activates genes involved in mucosal cell cycle progression.

Conclusions:

  • While glutamine likely supports intestinal mucosal function, its precise mechanisms remain equivocal.
  • The clinical benefits of glutamine supplementation for mucosal health are not definitively proven.
  • Further research is needed to elucidate glutamine's subtle regulatory roles in the intestine.