CD1-restricted adaptive immune responses to Mycobacteria in human group 1 CD1 transgenic mice.

CD1-restricted adaptive immune responses to Mycobacteria in human group 1 CD1 transgenic mice.
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人类 1 组 CD1 转基因小鼠对分枝杆菌的 CD1 限制适应性免疫反应。

DOI:
10.1084/jem.20090898
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发表时间:
2009-10-26
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Wang CR
Wang CR
中科院分区:
其他
文献类型:
--
作者:
Felio K;Nguyen H;Dascher CC;Choi HJ;Li S;Zimmer MI;Colmone A;Moody DB;Brenner MB;Wang CR

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第1组CD1(CD1a,CD1b和CD1c)限制性T细胞识别分枝杆菌脂质抗原,并在结核分枝杆菌(Mtb)感染的个体中以较高的频率发现。然而,由于缺乏合适的小动物模型,它们在感染期间的作用和动力学仍然未知。我们已经产生了人组1 CD1转基因(hCD1Tg)小鼠,表达所有三种人组1 CD1亚型,并支持开发具有不同T细胞受体用途的组1 CD1限制性T细胞。分枝杆菌感染和Mtb脂质免疫均在hCD1Tg小鼠中引起第1组CD 1限制性Mtb脂质特异性T细胞应答。与CD1d限制性NKT细胞(其对初始刺激快速响应,但在再暴露时表现出无反应性)相反,第1组CD1限制性T细胞表现出延迟的初级应答和更快速的次级应答,与常规T细胞相似。总的来说,我们的数据表明,第1组CD1限制性T细胞参与分枝杆菌感染后的适应性免疫反应,并可作为新的结核病疫苗的发展目标。
Group 1 CD1 (CD1a, CD1b, and CD1c)–restricted T cells recognize mycobacterial lipid antigens and are found at higher frequencies in Mycobacterium tuberculosis (Mtb)–infected individuals. However, their role and dynamics during infection remain unknown because of the lack of a suitable small animal model. We have generated human group 1 CD1 transgenic (hCD1Tg) mice that express all three human group 1 CD1 isoforms and support the development of group 1 CD1–restricted T cells with diverse T cell receptor usage. Both mycobacterial infection and immunization with Mtb lipids elicit group 1 CD1–restricted Mtb lipid–specific T cell responses in hCD1Tg mice. In contrast to CD1d-restricted NKT cells, which rapidly respond to initial stimulation but exhibit anergy upon reexposure, group 1 CD1–restricted T cells exhibit delayed primary responses and more rapid secondary responses, similar to conventional T cells. Collectively, our data demonstrate that group 1 CD1–restricted T cells participate in adaptive immune responses upon mycobacterial infection and could serve as targets for the development of novel Mtb vaccines.
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