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Curr Opin Clin Nutr Metab Care. 2010 Sep;13(5):569-73. doi: 10.1097/MCO.0b013e32833b648e.

Dietary conjugated linoleic acid and n-3 polyunsaturated fatty acids in inflammatory bowel disease.

Author information

  • 1Laboratory of Nutritional Immunology and Molecular Nutrition, Virginia Bioinformatics Institute, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA. jbassaga@vt.edu

Abstract

PURPOSE OF REVIEW:

Inflammatory bowel disease (IBD) is a debilitating and widespread immune-mediated illness of unknown etiology. Current treatments are modestly successful and with significant side-effects. The purpose of this review is to summarize the current understanding of mechanisms of action underlying the anti-inflammatory actions of conjugated linoleic acid (CLA) and n-3 polyunsaturated fatty acids (PUFAs) in IBD.

RECENT FINDINGS:

Nutrition-based interventions that target peroxisome proliferator-activated receptors (PPARs) such as dietary CLA and n-3 PUFA have demonstrated anti-inflammatory efficacy in animal models of IBD. Clinical data on n-3 PUFA in IBD remains generally unimpressive, although results of a recent human study demonstrate that IBD remission can be maintained by maintaining the n-3: n-6 ratio more than 0.65 via n-3 PUFA intervention. In mice, CLA prevented inflammation-driven colorectal cancer by activating PPAR gamma and modulating regulatory T cells and macrophages. CLA is the subject of an ongoing clinical study in Crohn's disease patients.

SUMMARY:

Compelling evidence demonstrates that n-3 PUFA and CLA prevent or ameliorate IBD in animal models. However, this basic knowledge has not been translated into novel nutrition-based clinical interventions. For both compounds there is an urgent need for placebo-controlled, large-scale, multicenter clinical trials.

PMID:
20508519
[PubMed - indexed for MEDLINE]
PMCID:
PMC2947030
Free PMC Article
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