Xia et al. (2022) studied the role of QCWZD in the colitis model induced by DSS and found that treatment of QCWZD significantly reduced the levels of myeloperoxidase (MPO), inflammatory cell infiltration to the colon and the levels of inflammatory mediators in serum, meanwhile, it promoted expression of occludin and ZO-1. This evidence concerns the gene MPO and colitis.