NOS2 and inflammatory bowel disease: qRT-PCR revealed that AgB significantly decreased iNOS expression (1.126 ± 0.294 and 2.932 ± 1.026, P < 0.05) and increased Fizz1 expression in the IBD model (0.239 ± 0.066 and 0.467 ± 0.063, P < 0.05) (Fig. 7).