Ifnlr1 expression is decreased in the small and large intestines of Ifnlr1f/f-Villincre mice. Ifnlr1 expression is decreased in the small and large intestines.

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Bryan Castro Joyce Lloyd (Mentor ) Virginia Commonwealth University Dept of Human and Molecular Genetics.
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Ifnlr1 expression is decreased in the small and large intestines of Ifnlr1f/f-Villincre mice. Ifnlr1 expression is decreased in the small and large intestines of Ifnlr1f/f-Villincre mice. (A) Schematic depicting the Ifnlr1 gene locus in Ifnlr1tm1a(EUCOMM)Wtsi mice. After crossing with mice expressing Flp recombinase (+Flp recombinase), the region between the two FRT sites was deleted, leaving conditional-ready Ifnlr1f/f mice. In the absence of Cre, all exons are present. With the addition of Cre recombinase, the floxed exon 2 is deleted. (B) In the absence of Cre [Cre(−)], the IFNLR1 protein is expressed. In the presence of Cre [Cre(+)], the protein sequence is altered at amino acid 20 and a premature stop codon is introduced at amino acid 42. (C to F) Ifnlr1 expression was assessed by quantitative real-time PCR of sites along the intestine and the lung, MLN and spleen, and epithelial and LP fractions from Ifnlr1f/f-Villincre (C), Ifnlr1f/f-MRP8cre (D), Ifnlr1f/f-LysMcre (E), and Ifnlr1f/f-CD11ccre (F) mice compared to their Ifnlr1f/f littermates. Ifnlr1 expression was also assessed by quantitative real-time PCR of isolated bone marrow neutrophils from Ifnlr1f/f-MRP8cre (D), splenic macrophages from Ifnlr1f/f-LysMcre (E), and splenic dendritic cells from Ifnlr1f/f-CD11ccre (F) mice compared to their Ifnlr1f/f littermates. n = 4 to 7 samples per group, from two independent experiments, analyzed by Mann-Whitney test. *, P < 0.05; **, P < 0.01; ns, not significant. Megan T. Baldridge et al. J. Virol. 2017;91:e02079-16