Immune privilege of the CNS is not the consequence of limited antigen sampling.

Immune privilege of the CNS is not the consequence of limited antigen sampling.
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DOI:
10.1038/srep04422
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发表时间:
2014-03-21
期刊:
影响因子:
4.6
通讯作者:
Fabry Z
Fabry Z
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Harris MG;Hulseberg P;Ling C;Karman J;Clarkson BD;Harding JS;Zhang M;Sandor A;Christensen K;Nagy A;Sandor M;Fabry Z

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中枢神经系统(CNS)免疫豁免是复杂的,并且仍然不理解CNS抗原如何在稳态条件下被外周免疫系统采样。为了比较免疫豁免或非豁免组织的抗原采样,我们创建了少突胶质细胞或肠上皮细胞表达EGFP标记的融合蛋白的转基因小鼠,该融合蛋白含有卵清蛋白(OVA)抗原肽,并测试了外周抗OVA肽特异性前哨OT-I和OT-II T细胞活化。我们报告,少突胶质细胞或肠道抗原的采样类似,由相当水平的OT-I T细胞活化。然而,活化的T细胞在稳态条件下不进入CNS。这些数据表明,传入免疫通常是完整的,因为在抗原采样水平没有屏障,但传出免疫受到限制。了解这种片面的监测如何促进中枢神经系统免疫特权将帮助我们定义中枢神经系统自身免疫性疾病启动的机制。
Central nervous system (CNS) immune privilege is complex, and it is still not understood how CNS antigens are sampled by the peripheral immune system under steady state conditions. To compare antigen sampling from immune-privileged or nonprivileged tissues, we created transgenic mice with oligodendrocyte or gut epithelial cell expression of an EGFP-tagged fusion protein containing ovalbumin (OVA) antigenic peptides and tested peripheral anti-OVA peptide-specific sentinel OT-I and OT-II T cell activation. We report that oligodendrocyte or gut antigens are sampled similarly, as determined by comparable levels of OT-I T cell activation. However, activated T cells do not access the CNS under steady state conditions. These data show that afferent immunity is normally intact as there is no barrier at the antigen sampling level, but that efferent immunity is restricted. To understand how this one-sided surveillance contributes to CNS immune privilege will help us define mechanisms of CNS autoimmune disease initiation.
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