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The hypothetical mechanism of SN’s α7nAchR-mediated anti-inflammatory effect on the intestinal immune barrier during foodborne enteritis in the fish hindgut (A) at the immune level; (B) at the microbiota and metabolic level. IEL, intestinal epithelial layer; LP, lamina propria layer; Mø, macrophage; Th, T helper; Treg, regulatory T cell.
