Ozone controls the metabolism of tryptophan protecting against sepsis-induced intestinal damage by activating aryl hydrocarbon receptor

Figure 5 Tryptophan metabolism of the intestinal flora-DL-tryptophan activates aryl hydrocarbon receptor to mitigate sepsis-induced intestinal injury. A and B: Hematoxylin-eosin staining; C and D: Interleukin-6 and tumor necrosis factor-α levels in the colon, shown by immunohistochemistry; E-H: Immunofluorescence staining of cluster of differentiation (CD) 206, CD86, zonula occludens-1, and occluding. ^bP < 0.01. ^cP < 0.001. CLP: Cecal ligation and puncture; DL-Trp: DL-tryptophan; IL-6: Interleukin-6; CD: Cluster of differentiation; TNF-α: Tumor necrosis factor-α; ZO-1: Zonula occludens-1.