Tropomyosin: An Excretory/Secretory Protein from Haemonchus contortus Mediates the Immuno-Suppressive Potential of Goat Peripheral Blood Mononuclear Cells In Vitro

文献类型： 外文期刊

第一作者： Ehsan, Muhammad

作者： Ehsan, Muhammad;Haseeb, Muhammad;Ali, Haider;Memon, Muhammad Ali;Yan, Ruofeng;Xu, Lixin;Song, Xiaokai;Li, Xiangrui;Ehsan, Muhammad;Hu, Ruisi;Zhu, Xingquan

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关键词： Haemonchus contortus; tropomyosin; goat; PBMCs; host-parasite interactions; immune responses

期刊名称：VACCINES （ 影响因子：4.422； 五年影响因子：5.513 ）

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年卷期： 2020 年 8 卷 1 期

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收录情况： SCI

摘要： During host-parasite interactions, binding of excretory/secretory proteins (ESPs) on the host immune cells is considered the fundamental phase for regulation of immune responses. In this study, gene encoding Haemonchus contortus tropomyosin (Hc-TpMy), was successfully cloned and expressed, and the recombinant protein after host cell surface attachment was evaluated for immune functional analysis with goat peripheral blood mononuclear cells (PBMCs) in vitro. The isopropyl-beta-D-thiogalactopyranoside (IPTG)-induced recombinant protein was successfully recognized by the sera of rat experimentally infected with rHc-TpMy. The immunofluorescence assay detected attachment of rHc-TpMy on the surface of host PBMCs. Furthermore, immunoregulatory roles of rHc-TpMy on cytokines expression, PBMC proliferation, migration, nitric oxide (NO) production, apoptosis and monocytes phagocytosis were observed. The results showed that expression of IL-4 and IFN-gamma cytokines, cell proliferation, NO production and PBMC migration were significantly suppressed by goat PBMCs after co-incubation with rHc-TpMy protein. However, the productions of IL-10, IL-17 and TGF-beta 1 cytokines, PBMCs apoptosis and monocytes phagocytosis were elevated at dose dependent manner. Our findings indicated that rHc-TpMy is an important ES binding protein exhibit distinct immuno-suppressive roles on goat PBMCs which might be a potential molecular target to control haemonchosis in future.

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