Tuftsin promotes an anti-inflammatory switch and attenuates symptoms in experimental autoimmune encephalomyelitis.

Tuftsin promotes an anti-inflammatory switch and attenuates symptoms in experimental autoimmune encephalomyelitis.
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DOI:
10.1371/journal.pone.0034933
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Tsirka SE
Tsirka SE
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wu M;Nissen JC;Chen EI;Tsirka SE

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多发性硬化(MS)是一种脱髓鞘性自身免疫性疾病,在血脑屏障受损后,由T细胞浸润到中枢神经系统介导。我们之前的研究表明,巨噬细胞/小胶质细胞激活剂tuftsin可显著改善实验性自身免疫性脑脊髓炎(EAE)的临床病程,这是ms的一种成熟的动物模型。tuftsin给药与免疫抑制辅助性t细胞(Th2)细胞因子转录因子GATA-3的上调相关。我们现在表明,簇蛋白介导的小胶质细胞激活导致小胶质细胞向抗炎表型转移。此外,暴露于簇蛋白处理的活化小胶质细胞后,T细胞表型转向免疫保护;具体来说,促炎Th1反应的下调与th2特异性反应的上调和免疫抑制调节性T细胞(Tregs)的扩增一起被触发。最后,通过过继性转移将簇蛋白转移的T细胞传递给动物,逆转了在已建立EAE的小鼠中观察到的病理。综上所述,我们的研究结果表明,tuftsin减少了EAE的促炎环境,可能代表了治疗MS的治疗机会。
Multiple sclerosis (MS) is a demyelinating autoimmune disease mediated by infiltration of T cells into the central nervous system after compromise of the blood-brain barrier. We have previously shown that administration of tuftsin, a macrophage/microglial activator, dramatically improves the clinical course of experimental autoimmune encephalomyelitis (EAE), a well-established animal model for MS. Tuftsin administration correlates with upregulation of the immunosuppressive Helper-2 Tcell (Th2) cytokine transcription factor GATA-3. We now show that tuftsin-mediated microglial activation results in shifting microglia to an anti-inflammatory phenotype. Moreover, the T cell phenotype is shifted towards immunoprotection after exposure to tuftsin-treated activated microglia; specifically, downregulation of pro-inflammatory Th1 responses is triggered in conjunction with upregulation of Th2-specific responses and expansion of immunosuppressive regulatory T cells (Tregs). Finally, tuftsin-shifted T cells, delivered into animals via adoptive transfer, reverse the pathology observed in mice with established EAE. Taken together, our findings demonstrate that tuftsin decreases the proinflammatory environment of EAE and may represent a therapeutic opportunity for treatment of MS.
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