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Noncontaminated dietary oats may hamper normalization of the intestinal immune status in childhood celiac disease.
Department of Clinical Microbiology, Immunology, Umeå University, Umeå, Sweden.
Linköping University, Department of Clinical and Experimental Medicine, Division of Microbiology and Molecular Medicine. Linköping University, Faculty of Health Sciences.
ology, Immunology, Umeå University, Umeå, Sweden.
Linköping University, Department of Clinical and Experimental Medicine, Division of Microbiology and Molecular Medicine. Linköping University, Faculty of Health Sciences.
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2014 (English)In: Clinical and Translational Gastroenterology, ISSN 2155-384X, E-ISSN 2155-384X, Vol. 5, no e58Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: Life-long, strict gluten-free diet (GFD) is the only treatment for celiac disease (CD). Because there is still uncertainty regarding the safety of oats for CD patients, the aim was to investigate whether dietary oats influence the immune status of their intestinal mucosa.

METHODS: Paired small intestinal biopsies, before and after >11 months on a GFD, were collected from children with CD who were enrolled in a randomized, double-blind intervention trial to either of two diets: standard GFD (GFD-std; n=13) and noncontaminated oat-containing GFD (GFD-oats; n=15). Expression levels of mRNAs for 22 different immune effector molecules and tight junction proteins were determined by quantitative reverse transcriptase (RT)-PCR.

RESULTS: The number of mRNAs that remained elevated was higher in the GFD-oats group (P=0.05). In particular, mRNAs for the regulatory T cell (Treg) signature molecules interleukin-10 (IL-10) and transforming growth factor-β1 (TGF-β1), the cytotoxicity-activating natural killer (NK) receptors KLRC2/NKG2C and KLRC3/NKG2E, and the tight junction protein claudin-4 remained elevated. Between the two groups, most significant differences were seen for claudin-4 (P=0.003) and KLRC3/NKG2E (P=0.04).

CONCLUSIONS: A substantial fraction of pediatric CD patients seem to not tolerate oats. In these patients, dietary oats influence the immune status of the intestinal mucosa with an mRNA profile suggesting presence of activated cytotoxic lymphocytes and Tregs and a stressed epithelium with affected tight junctions. Assessment of changes in levels of mRNA for claudin-4 and KLC3/NKG2E from onset to after a year on oats containing GFD shows promise to identify these CD patients.

Place, publisher, year, edition, pages
Nature Publishing Group, 2014. Vol. 5, no e58
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Pediatrics
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URN: urn:nbn:se:liu:diva-115888DOI: 10.1038/ctg.2014.9ISI: 000355530800002PubMedID: 24964993Scopus ID: 2-s2.0-84903278030OAI: oai:DiVA.org:liu-115888DiVA: diva2:797149
Available from: 2015-03-23 Created: 2015-03-23 Last updated: 2017-12-04Bibliographically approved

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Hollén, ElisabetMagnusson, Karl-EricFälth-Magnusson, KarinHolmgren Peterson, KajsaHögberg, Lotta

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Hollén, ElisabetMagnusson, Karl-EricFälth-Magnusson, KarinHolmgren Peterson, KajsaHögberg, Lotta
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Division of Microbiology and Molecular MedicineFaculty of Health SciencesDivision of Clinical SciencesDepartment of Paediatrics in LinköpingDepartment of Paediatrics in Norrköping
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