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Abstract
Crypt hyperplasia is a key feature of celiac disease (CeD) and several other small intestinal inflammatory conditions. Analysis of the gut epithelial crypt zone by mass spectrometry–based tissue proteomics revealed a strong IFN-γ signal in active CeD. This signal, hallmarked by increased expression of MHC molecules, was paralleled by diminished expression of proteins associated with fatty acid metabolism. Crypt hyperplasia and the same proteomic changes were observed in WT mice administered IFN-γ. In mice with conditional KO of the IFN-γ receptor in gut epithelial cells, these signature morphological and proteomic changes were not induced with IFN-γ administration. IFN-γ was thus a driver of crypt hyperplasia in CeD by acting directly on crypt epithelial cells. The results are relevant to other enteropathies with involvement of IFN-γ.
Authors
Jorunn Stamnaes, Daniel Stray, M. Fleur du Pré, Louise F. Risnes, Alisa E. Dewan, Jakeer Shaik, Maria Stensland, Knut E.A. Lundin, Ludvig M. Sollid
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ISSN: 0021-9738 (print), 1558-8238 (online)