Identification of emu-TegP11, an EF-hand domain-containing tegumental protein of Echinococcus multilocularis

文献类型： 外文期刊

第一作者： Zheng, Yadong

作者： Zheng, Yadong;Guo, Xiaola;Su, Meng;Chen, Xiaoqian;Jia, Wanzhong;Zheng, Yadong;Jin, Xiaoliang;Ding, Juntao;Wang, Zhengrong;Bo, Xinwen;Ayaz, Mazhar;Kutyrev, Ivan;Zhang, Xichen;Zhang, Jing;Zhang, Jing;Zhang, Jing;Zhang, Jing

作者机构：

关键词： Echinococcus multilocularis; Protoscolex; emu-TegP11; Tegumental protein

期刊名称：VETERINARY PARASITOLOGY （ 影响因子：2.738； 五年影响因子：2.951 ）

ISSN： 0304-4017

年卷期： 2018 年 255 卷

页码：

收录情况： SCI

摘要： Tegumental proteins (TegPs) are a group of proteins that coat on the surface of worms, mainly being involved in ion uptake and immune evasion. Echinococcus species have many TegPs, but none of them have been characterized and their role remains unclear. The genome-wide analysis revealed that there were at least 14 tegp genes (tegpl - 14) in Echinococcus species, the majority of which were found to contain an EF-hand domain or a dynein light chain-like domain or both. Despite low identity, all TegP11 proteins from 25 flatworms were conserved in structure. Echinococcus multilocularis TegP11 (emu-TegP11) was verified to be secreted by extra cellular vesicles and to be localized in different spatiotemporal patterns in protoscoleces. Moreover, emu-TegP11 was also shown to have weak or no Ca2+-binding capacity. In treated macrophages, emu-TegP11 interfered with the small RNA-induced silencing pathway via inducing ectopic expression of some key component genes. Additionally, emu-TegP11 remarkably promoted NO secretion possibly by upregulation of inos gene expression (p < 0.05). It was further shown that emu-TegP11 acted as a suppressor of inflammation, with il-12B and il-1 beta being significantly down-regulated (p < 0.01), and il-10 and il-4 being significantly upregulated (p < 0.05). The study demonstrates a regulatory role of emu-TegP11, likely acting as a immunomodulator to be involved in regulation of host immune system during Echinococcus infection.

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