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Abstract Title:

Impact of dietary gluten on regulatory T cells and th17 cells in BALB/c mice.

Abstract Source:

PLoS One. 2012 ;7(3):e33315. Epub 2012 Mar 13. PMID: 22428018

Abstract Author(s):

Julie Christine Antvorskov, Petra Fundova, Karsten Buschard, David P Funda

Article Affiliation:

The Bartholin Institute, Rigshospitalet, Copenhagen, Denmark.

Abstract:

Dietary gluten influences the development of type 1 diabetes (T1D) and a gluten-free (GF) diet has a protective effect on the development of T1D. Gluten may influence T1D due to its direct effect on intestinal immunity; however, these mechanisms have not been adequately studied. We studied the effect of a GF diet compared to a gluten-containing standard (STD) diet on selected T cell subsets, associated with regulatory functions as well as proinflammatory Th17 cells, in BALB/c mice. Furthermore, we assessed diet-induced changes in the expression of various T cell markers, and determined if changes were confined to intestinal or non-intestinal lymphoid compartments. The gluten-containing STD diet led to a significantly decreased proportion ofγδ T cells in all lymphoid compartments studied, although an increase was detected in some γδ T cell subsets (CD8(+), CD103(+)). Further, it decreased the proportion of CD4(+)CD62L(+) T cells in Peyer's patches. Interestingly, no diet-induced changes were found among CD4(+)Foxp3(+) T cells or CD3(+)CD49b(+)cells (NKT cells) and CD3(-)CD49b(+) (NK) cells. Mice fed the STD diet showed increased proportions of CD4(+)CD45RB(high+) and CD103(+) T cells and a lower proportion of CD4(+)CD45RB(low+) T cells in both mucosal and non-mucosal compartments. The Th17 cell population, associated with thedevelopment of autoimmunity, was substantially increased in pancreatic lymph nodes of mice fed the STD diet. Collectively, our data indicate that dietary gluten influences multiple regulatory T cell subsets as well as Th17 cells in mucosal lymphoid tissue while fewer differences were observed in non-mucosal lymphoid compartments.

Study Type : Animal Study

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Sayer Ji
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