Cocoa Diet Prevents Antibody Synthesis and Modifies Lymph Node Composition and Functionality in a Rat Oral Sensitization Model

Cocoa powder, a rich source of polyphenols, has shown immunomodulatory properties in both the intestinal and systemic immune compartments of rats. The aim of the current study was to establish the effect of a cocoa diet in a rat oral sensitization model and also to gain insight into the mesenteric l...

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Bibliographic Details
Published in:Nutrients 2016-04, Vol.8 (4), p.242-242
Main Authors: Camps-Bossacoma, Mariona, Abril-Gil, Mar, Saldaña-Ruiz, Sandra, Franch, Àngels, Pérez-Cano, Francisco J, Castell, Margarida
Format: Article
Language:English
Subjects:
Animals
Antibodies - physiology
Body Weight
Chocolate
cholera toxin
Cholera Toxin - immunology
Cytokines - genetics
Cytokines - metabolism
Drinking
Eating
Flavonoids
Gene Expression Regulation
intestinal sensitization
Lymph Nodes
Lymphocyte Subsets
nutraceutic
oral tolerance
ovalbumin
Ovalbumin - immunology
Polyphenols
Rats
specific antibodies
Tγδ+ cells
Water
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Summary:Cocoa powder, a rich source of polyphenols, has shown immunomodulatory properties in both the intestinal and systemic immune compartments of rats. The aim of the current study was to establish the effect of a cocoa diet in a rat oral sensitization model and also to gain insight into the mesenteric lymph nodes (MLN) activities induced by this diet. To achieve this, three-week-old Lewis rats were fed either a standard diet or a diet with 10% cocoa and were orally sensitized with ovalbumin (OVA) and with cholera toxin as a mucosal adjuvant. Specific antibodies were quantified, and lymphocyte composition, gene expression, and cytokine release were established in MLN. The development of anti-OVA antibodies was almost totally prevented in cocoa-fed rats. In addition, this diet increased the proportion of TCRγδ+ and CD103+CD8+ cells and decreased the proportion of CD62L+CD4+ and CD62L+CD8+ cells in MLN, whereas it upregulated the gene expression of OX40L, CD11c, and IL-1β and downregulated the gene expression of IL-17α. In conclusion, the cocoa diet induced tolerance in an oral sensitization model accompanied by changes in MLN that could contribute to this effect, suggesting its potential implication in the prevention of food allergies.
ISSN:2072-6643
2072-6643
DOI:10.3390/nu8040242