Emerging roles for extracellular vesicles in Schistosoma infection

被引:9
作者
Abou-El-Naga, Iman F. [1 ]
机构
[1] Alexandria Univ, Fac Med, Med Parasitol Dept, Alexandria, Egypt
关键词
Exosomes; miRNA; Biogenesis; Immune modulation; Macrophage; Vaccine; BIOMPHALARIA-ALEXANDRINA SNAILS; MANSONI EGGS; T-CELLS; BIOGENESIS; EXOSOMES; VACCINE; SECRETION; HOST; ENDOCYTOSIS; MODULATION;
D O I
10.1016/j.actatropica.2022.106467
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
The co-evolution of Schistosoma and its host necessitates the use of extracellular vesicles (EVs) generated by different lifecycle stages to manipulate the host immune system to achieve a delicate balance between the survival of the parasite and the limited pathology of the host. EVs are phospholipid bilayer membrane-enclosed vesicles capable of transferring a complex mixture of proteins, lipids, and genetic materials to the host. They are nano-scale-sized vesicles involved in cellular communication. In this review, the author summarized the proteins involved in the biogenesis of schistosome-derived EVs and their cargo load. miRNAs are one cargo molecule that can underpin EVs functions and significantly affect parasite/host interactions and immune modulation. They skew macrophage polarization towards the M1 phenotype and downregulate Th2 immunity. Schistosoma can evade the host immune system's harmful effects by utilizing this strategy. In order to compromise the protective effect of Th2, EVs upregulate T regulatory cells and activate eosinophils, which contribute to granuloma formation. Schistosomal EVs also affect fibrosis by acting on non-immune cells such as hepatic stellate cells. These vesicles drew attention to translational applications in diagnosis, immunotherapy, and potential vaccines. A deep understanding of the interaction of schistosome-derived EVs with host cells will significantly increase our knowledge about the dynamics between the host and the worm that may aid in controlling this debilitating disease.
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页数:12
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