Abstract：
:Trichinella spiralis maintains chronic infections within its host, involving a variety of immunomodulatory properties, the mechanisms of which have not been completely elucidated. In this study, we found that T. spiralis infection induced strong regulatory T cell responses through parasite excretory-secretory (ES) products, characterized by increase of CD4+CD25+Foxp3+ and CD4+CD25-Foxp3+ Treg cells accompanied by high levels of IL-10 and TGF-β. T. spiralis adult worm excretory-secretory products (AES) and muscle larvae excretory-secretory products (MES) were both able to activate BMDCs in vitro to facilitate their maturation and to create regulatory cytokines IL-10 and TGF-β. The T. spiralis AES- and MES-pulsed dendritic cells (DCs) possessed abilities not only to present antigens to sensitized CD4+ T cell to stimulate their proliferation but also to induce naive CD4+ T cells to differentiate to Treg cells secreting IL-10 and TGF-β. The passive transfer of T. spiralis AES- and MES-pulsed bone marrow-derived dendritic cells (BMDCs) conferred the naive mice to acquire the differentiation of Treg cells. T. spiralis AES possesses a better ability to induce Treg cells than did MES, although the latter has the ability to induce CD4+CD25-Foxp3+ Treg cells. The results obtained in this study suggested that T. spiralis ES products stimulate the differentiation of host Treg cells possibly through activating dendritic cells to create a regulatory environment that benefits the survival of the parasite in the host.
journal_name
Cellsjournal_title
Cellsauthors
Sun XM,Guo K,Hao CY,Zhan B,Huang JJ,Zhu Xdoi
10.3390/cells8111404subject
Has Abstractpub_date
2019-11-07 00:00:00issue
11issn
2073-4409pii
cells8111404journal_volume
8pub_type
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