Antigen-specific regulation of IgE antibodies by non-antigen-specific γδ T cells.

Antigen-specific regulation of IgE antibodies by non-antigen-specific γδ T cells.
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DOI:
10.4049/jimmunol.1202230
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发表时间:
2013-02-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Born WK
Born WK
中科院分区:
其他
文献类型:
--
作者:
Huang Y;Aydintug MK;Loomis J;Macleod MK;McKee AS;Kirchenbaum G;Jakubzick CV;Kedl RM;Sun D;Jacobelli J;O'Brien RL;Born WK

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我们重新检验了这一观察结果:当从耐受吸入常规抗原 (Ag) 的小鼠中转移 γδ T 细胞时,会特异性抑制对该 Ag 的过敏性 IgE 反应。我们以交叉方式使用卵清蛋白和鸡蛋溶菌酶,证实了 γδ T 细胞的 Ag 特异性 IgE 调节作用。尽管只有 Vγ4+ γδ T 细胞是调节因子,但 Ag 特异性并非源于其 γδ TCR 的特异性。相反,Vγ4+ γδ T 细胞未能对任一 Ag 做出反应,但在静脉注射后迅速获得了体内 Ag 特异性调节功能。注射来自 Ag 耐受小鼠脾脏的非 T 细胞。这与它们从静脉注射体内获取 Ag 相关。注射Ag负载的脾非T细胞,以及膜标记的体内转移为注射的脾非T细胞和Vγ4+γδT细胞之间的直接接触提供了证据。总之,我们的数据表明,当 γδ T 细胞获得 Ag 时,Ag 本身可以指导其 IgE 抑制的特异性。
We re-examined the observation that γδ T cells, when transferred from mice tolerized to an inhaled conventional antigen (Ag), suppress the allergic IgE response to this Ag specifically. Using ovalbumin and hen egg lysozyme in crisscross fashion, we confirmed the Ag-specific IgE regulatory effect of the γδ T cells. Although only Vγ4+ γδ T cells are regulators, the Ag specificity does not stem from specificity of their γδ TCRs. Instead, the Vγ4+ γδ T cells failed to respond to either Ag, but rapidly acquired Ag-specific regulatory function in vivo following i.v. injection of non-T cells derived from the spleen of Ag-tolerized mice. This correlated with their in vivo Ag acquisition from i.v. injected Ag-loaded splenic non-T cells, and in vivo transfer of membrane label provided evidence for direct contact between the injected splenic non-T cells and the Vγ4+ γδ T cells. Together, our data suggest that Ag itself, when acquired by γδ T cells, directs the specificity of their IgE suppression.
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