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- W4312115142 abstract "While vitamin D (VitD) levels are negatively correlated with inflammatory bowel disease (IBD) activity, VitD supplementation does not reduce IBD severity. The probiotic Lactobacillus rhamnosus GG (LGG), which secretes p40, can upregulate colonic VitD receptor (VDR) expression. We therefore evaluated synergy between VitD3 and LGG/p40 in the treatment of mouse colitis.A dextran sulfate sodium (DSS) colitis model was established in Vdr+/+ and Vdr-/- mice, and mice were treated with VitD3, LGG, or p40 alone or in combination for 7 to 14 days. Colitis severity was assessed by weight loss, disease activity index (DAI), colon length, histology, and inflammatory cytokine expression together with VDR expression, proliferation, and apoptosis. In vitro, VDR expression and cell viability were assessed in HCT116 cells after stimulation with p40.Total and nuclear VDR protein expression were lower in DSS-treated Vdr+/+ mice compared with control mice (P < .05). Compared with the DSS group, VitD3 + LGG alleviated colitis as assessed by significantly improved DAI and histological scores, increased colon length, decreased colonic Tnf, and increased Il10 expression together with increased colonic VDR gene and protein expression and increased Ki-67 proliferation index (P < .05). In Vdr-/- mice, VitD3 + LGG had no effect on DSS colitis. In Vdr+/+ mice, VitD3 + p40 also reduced colitis severity according to clinicopathological and immunological metrics and increased VDR expression and epithelial proliferation (P < .05). In HCT116 cells, p40 stimulation increased VDR protein expression and viability (P < .05).VitD3 and LGG/p40 synergistically improve the severity of colitis by increasing colonic VDR expression and promoting colonic epithelial proliferation.There is increasing evidence that vitamin D and its associated pathways may be a helpful adjunct to inflammatory bowel disease therapies. This experimental study shows that vitamin D may synergize with the probiotic Lactobacillus rhamnosus GG for enhanced therapeutic effect." @default.
- W4312115142 created "2023-01-04" @default.
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- W4312115142 date "2022-12-23" @default.
- W4312115142 modified "2023-10-04" @default.
- W4312115142 title "Vitamin D3 and <i>Lactobacillus rhamnosus</i> GG/p40 Synergize to Protect Mice From Colitis by Promoting Vitamin D Receptor Expression and Epithelial Proliferation" @default.
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- W4312115142 doi "https://doi.org/10.1093/ibd/izac238" @default.
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