MPO and ulcerative colitis: Tao et al. (2022) demonstrated that, compared to natural pectin, selenylation pectin provided preferable protection against ulcerative colitis by down-regulating the IL-6 and TNF-α contents and up-regulating the IL-10 content of the serum and by increasing the glutathione peroxidase (GSH-Px) activity and decreasing the myeloperoxidase (MPO) content of colon tissues [89].