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Third-stage Gnathostoma spinigerum larva excretory secretory antigens modulate function of Fc gamma receptor I-mediated monocytes in peripheral blood mononuclear cell culture

机译:阶段性食蟹恶性多形菌幼虫排泄分泌抗原调节外周血单核细胞培养中Fcγ受体I介导的单核细胞的功能

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摘要

BackgroundThird (infective)-stage Gnathostoma spinigerum larvae (L3) mainly cause human gnathostomiasis. G. spinigerum L3 migrate throughout the subcutaneous tissues, vital organs, and central nervous system and can cause various pathogenesis including sudden death. Interestingly, G. spinigerum L3 can survive and evade host cellular immunity for months or years. The effects of G. spinigerum excretory-secretory (ES) products involved in larval migration and immune-evasive strategies are unknown. Monocytes are innate immune cells that act as phagocytic and antigen-presenting cells and also play roles against helminthic infections via a complex interplay between other immune cells. Fc gamma receptor I (FcγRI) is a high-affinity receptor that is particularly expressed on monocytes, macrophages, and dendritic cells. The cross-linking of FcγRI and antigen-antibody complex initiates signal transduction cascades in phagocytosis, cytokine production, and antibody-dependent cell-mediated cytotoxicity (ADCC). This study investigated whether ES antigen (ESA) from G. spinigerum L3 affects monocyte functions.
机译:背景技术第三阶段(感染性)的食虫性棘轮吸虫幼虫(L3)主要引起人鼻切开病。梭状芽孢杆菌L3在整个皮下组织,重要器官和中枢神经系统中迁移,并可引起各种发病机理,包括猝死。有趣的是,梭状芽孢杆菌L3可以存活并逃避宿主细胞免疫数月或数年。参与幼虫迁移和免疫逃避策略的棘孢菌分泌分泌物(ES)产品的作用尚不清楚。单核细胞是先天性免疫细胞,可作为吞噬细胞和抗原呈递细胞,还可以通过其他免疫细胞之间的复杂相互作用来抵抗蠕虫感染。 Fcγ受体I(FcγRI)是一种高亲和力受体,特别是在单核细胞,巨噬细胞和树突状细胞上表达。 FcγRI与抗原抗体复合物的交联在吞噬作用,细胞因子产生和抗体依赖性细胞介导的细胞毒性(ADCC)中引发信号转导级联反应。这项研究调查了来自梭状芽胞杆菌L3的ES抗原(ESA)是否影响单核细胞功能。

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