期刊
PARASITES & VECTORS
卷 10, 期 -, 页码 -出版社
BMC
DOI: 10.1186/s13071-017-2263-9
关键词
IL-10-producing B cells; IL-17A-producing B cells; Echinococcus granulosus protoscoleces; Excretory-secretory products; Inflammation
资金
- National Natural Science Foundation of China [81,501,762, 81,371,842, 81,371,841]
- Starting Foundation for Talents of Xuzhou Medical College [D2015004]
- Natural Science Foundation of the Jiangsu Higher Education Institutions [15KJB310025]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1501061A]
- China Postdoctoral Science Foundation [2015 M581864]
- Jiangsu Qing Lan Project
Background: Excretory-secretory products (ESPs) released by helminths are well-known to regulate T cell responses in the host. However, their direct influence in the differentiation of naive T cells, and especially B cells, remains largely unknown. This study investigated the effects of Echinococcus granulosus protoscoleces ESPs (EgPSC-ESPs) on the differentiation of IL-10-producing B cells (B10), IL-17A-producing B cells (B17) and Th17 cells. Methods: BALB/c mice injected with EgPSC were used to evaluate the in vivo profiles of B10, B17 and Th17 cells. In vitro purified CD19(+) B and naive CD4(+) T cells were cultured in the presence of native, heat-inactivated or periodate-treated EgPSC-ESPs, and the differentiation of these cell subsets were compared. Results: In contrast to the control group, infected mice showed higher frequencies of B10, B17 and Th17 cells, and higher levels of IL-10 and IL-17A in the sera. Interestingly, B17 cells were first identified to express CD19(+) CD1d(high). In vitro, B cells cultured with native ESPs exhibited a higher percentage of B10 cells but lower percentage of B17 and Th17 cells compared to the PBS group. Moreover, the relative expression of IL-10 and IL-17A mRNA were consistent with the altered frequencies. However, ESPs subjected to heat-inactivation or periodate treatment exhibited an inverse effect on the induction of these cell subsets. Conclusions: Our findings indicate that ESPs released by EgPSC can directly regulate the differentiation of B10, B17 and Th17 cells, which appear to be heat-labile and carbohydrate-dependent.
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