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Digestive Diseases and Sciences

, Volume 55, Issue 11, pp 3078–3085 | Cite as

Naturally Occurring Glycoalkaloids in Potatoes Aggravate Intestinal Inflammation in Two Mouse Models of Inflammatory Bowel Disease

  • Vadim IablokovEmail author
  • Beate C. Sydora
  • Rae Foshaug
  • Jon Meddings
  • Darcy Driedger
  • Tom Churchill
  • Richard N. Fedorak
Original Article

Abstract

Background

Inflammatory bowel disease (IBD) may be initiated following disruption of the intestinal epithelial barrier. This disruption, in turn, permits luminal antigens unfettered access to the mucosal immune system and leads to an uncontrolled inflammatory response. Glycoalkaloids, which are found in potatoes, disrupt cholesterol-containing membranes such as those of the intestinal epithelium. Glycoalkaloid ingestion through potatoes may play a role in the initiation and/or perpetuation of IBD.

Aim

To determine if commercial and high glycoalkaloids containing fried potato skins aggravate intestinal inflammation using two different animal models of IBD.

Methods

Fried potato skins from commercial potatoes containing low/medium glycoalkaloid levels and high glycoalkaloids potatoes were fed for 20 days to interleukin 10 gene-deficient mice and dextran sodium sulfate-induced colitic mice. Intestinal permeability, mucosal cytokine and myeloperoxidase levels and body weight were determined to assess intestinal injury.

Results

Deep frying potato skins markedly increased glycoalkaloid content. Interleukin 10 gene-deficient mice fed fried commercial potato skins with medium glycoalkaloid content exhibited significantly elevated levels of ileal IFN-γ relative to controls. Mice in the dextran sodium sulfate colitis model that were fed the same strain of potatoes demonstrated significantly elevated levels of pro-inflammatory cytokines IFN-γ, TNF-α, and IL-17 in the colon in addition to an enhanced colonic permeability. Inflammatory response was intensified when the mice were fed potatoes with higher glycoalkaloid contents.

Conclusions

Our results demonstrate that consumption of potato skins containing glycoalkaloids can significantly aggravate intestinal inflammation in predisposed individuals.

Keywords

Glycoalkaloid Inflammatory bowel disease Crohn’s disease Ulcerative colitis Intestinal permeability Mucosal inflammation 

Notes

Acknowledgments

Funding

Crohn’s and Colitis Foundation of Canada (CCFC).

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Vadim Iablokov
    • 1
    Email author
  • Beate C. Sydora
    • 1
  • Rae Foshaug
    • 1
  • Jon Meddings
    • 1
  • Darcy Driedger
    • 3
  • Tom Churchill
    • 2
  • Richard N. Fedorak
    • 1
  1. 1.Division of GastroenterologyUniversity of AlbertaEdmontonCanada
  2. 2.Department of SurgeryUniversity of AlbertaEdmontonCanada
  3. 3.Alberta Agriculture and Rural DevelopmentBrooksCanada

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