Mucosal immunity: regulation by helper T cells and a novel method for detection.

Mucosal immunity: regulation by helper T cells and a novel method for detection.
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粘膜免疫:辅助 T 细胞的调节和一种新的检测方法。

DOI:
10.1016/0168-1656(95)00095-x
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发表时间:
1996
期刊:
Journal of biotechnology.
影响因子:
--
通讯作者:
McGhee,JR
McGhee,JR
中科院分区:
--
文献类型:
--
作者:
Jackson,RJ;Marinaro,M;VanCott,JL;Yamamoto,M;Okahashi,N;Fujihashi,K;Kiyono,H;Chatfield,SN;McGhee,JR

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调节粘膜IgA应答口服蛋白疫苗的机制尚未完全阐明。我们使用了两种递送系统,可溶性破伤风类毒素(TT)与粘膜佐剂霍乱毒素(CT)和重组沙门氏菌表达Tox C,TT的片段,以评估CD4 + T辅助(Th)细胞和衍生细胞因子的性质,这些细胞因子支持正常和细胞因子敲除(干扰素γ敲除; IFN-γ −/−和IL-4 −/−)小鼠的粘膜IgA应答。我们的研究结果提供了重要的新信息,Th细胞和细胞因子调节粘膜IgA反应。尽管TT与CT共同给药诱导主要的TT特异性Th2型应答,但Tox C的rSalmonella递送诱导主要的Th1型应答,沿着Th2细胞因子IL-10的合成。两种疫苗方案均引起巨噬细胞产生高水平的粘膜S-IgA和IL-6。此外,用rSalmonella Tox C口服免疫IFN-γ −/−和IL-4 −/−小鼠也诱导巨噬细胞来源的IL-6和Th2来源的IL-10以及S-IgA应答,表明来自Th1型细胞以及产生IL-4和IL-5的传统Th2细胞的IFN-γ对于粘膜IgA应答不是必需的。相反,在缺乏传统Th2细胞的情况下,诱导产生IL-10的第二水平Th2细胞以及来自其他细胞来源的高水平IL-6可能足以用于粘膜IgA应答。这些研究通过开发一种灵敏的新发光测定法来促进,该测定法允许检测低于当前固相测定法检测水平的细胞因子和细胞表面分子。
The mechanisms which regulate mucosal IgA responses to orally administered protein vaccines are not yet fully elucidated. We have used two delivery systems, soluble tetanus toxoid (TT) with the mucosal adjuvant cholera toxin (CT) and recombinant Salmonella expressing Tox C, a fragment of TT, to assess the nature of CD4+T helper (Th) cells and derived cytokines which support mucosal IgA responses in both normal and cytokine knockout (Interferon gamma knockout; IFN-γ−/−and IL-4−/−) mice. Our results provide important new information regarding Th cell and cytokine regulation of mucosal IgA responses. Whereas TT coadministered with CT induces predominant TT-specific Th2-type responses, rSalmonella delivery of Tox C induced dominant Thl-type responses along with synthesis of the Th2-cytokine IL-10. Both vaccine regimen elicited high levels of mucosal S-IgA and IL-6 production by macrophages. Further, oral immunization of IFN-γ−/−and IL-4−/−mice with rSalmonella Tox C also induced macrophage-derived IL-6 and Th2-derived IL-10 as well as S-IgA responses, suggesting that IFN-γ from Thl-type cells as well as traditional Th2 cells producing IL-4 and IL-5 are not essential for mucosal IgA responses. Rather, induction of second level Th2 cells producing IL-10 together with high levels of IL-6 from other cell sources may be sufficient for mucosal IgA responses in the absence of traditional Th2 cells. These studies were facilitated by the development of a sensitive new luminometry assay which allowed detection of cytokines and cell surface molecules which are below the levels of detection by current solid phase assays.
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DOI: --
发表时间: 1987
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