GCLC and Behcet disease: Compared with the BD+Saline group, the expression levels of the genes encoding Nrf2, CAT, SOD1, SOD2, GPX1, GST, NQD1, HO1, GCLC, and GCLM in the duodenum (Figure 5A) and ileum (Figure 5B), as well as those of the genes coding for Nrf2, CAT, SOD1, GPX1, GST, NQD1, HO1, GCLC, and GCLM in the ileum (Figure 5C) were significantly upregulated in the BD+ETEC group (P<0.05).