Cysteine protease of Clonorchis sinensis alleviates DSS-induced colitis in mice

作者：Xiaoying Xie, Zhanshuai Wu, Yuhong Wu, Jing Liu, Xinyuan Chen, Xiaoqian Shi, Caiheng Wei, Jiasheng Li, Jiahui Lv, Qing Li, Lili Tang, Shanshan He, Tingzheng Zhan, Zeli Tang · 发表于：PLoS neglected tropical diseases · 年份：2022 · DOI：10.1371/journal.pntd.0010774 · 被引用次数：21 · 研究领域：Parasites and Host Interactions、Inflammatory Bowel Disease、Trace Elements in Health

BACKGROUND: Currently, inflammatory bowel disease (IBD) has become a global chronic idiopathic disease with ever-rising morbidity and prevalence. Accumulating evidence supports the IBD-hygiene hypothesis that helminths and their derivatives have potential therapeutic value for IBD. Clonorchis sinensis (C. sinensis) mainly elicit Th2/Treg-dominated immune responses to maintain long-term parasitism in the host. This study aimed to evaluate the therapeutic effects of cysteine protease (CsCP) and adult crude antigen (CsCA) of C. sinensis, and C. sinensis (Cs) infection on DSS-induced colitis mice. METHODS: BALB/c mice were given 5% DSS daily for 7 days to induce colitis. During this period, mice were treated with rCsCP, CsCA or dexamethasone (DXM) every day, or Cs infection which was established in advance. Changes in body weight, disease activity index (DAI), colon lengths, macroscopic scores, histopathological findings, myeloperoxidase (MPO) activity levels, regulatory T cell (Treg) subset levels, colon gene expression levels, serum cytokine levels, and biochemical indexes were measured. RESULTS: Compared with Cs infection, rCsCP and CsCA alleviated the disease activity of acute colitis more significant without causing abnormal blood biochemical indexes. In comparison, rCsCP was superior to CsCA in attenuating colonic pathological symptoms, enhancing the proportion of Treg cells in spleens and mesenteric lymph nodes, and improving the secretion of inflammatory-related cytokines...