CD8(+) T Cells Are Required For Glatiramer Acetate Therapy in Autoimmune Demyelinating Disease.

CD8(+) T Cells Are Required For Glatiramer Acetate Therapy in Autoimmune Demyelinating Disease.
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DOI:
10.1371/journal.pone.0066772
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Karandikar NJ
Karandikar NJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Tyler AF;Mendoza JP;Firan M;Karandikar NJ

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醋酸格拉替雷(GA,Copaxone®)是 FDA 批准的一种治疗多发性硬化症 (MS) 的免疫调节疗法,经过数十年的研究,其确切机制仍不清楚。此前,我们已经证明,MS 的 GA 疗法会诱导 CD8+ T 细胞反应,从而可能抑制致病性 CD4+ T 细胞反应。使用多发性硬化症、实验性自身免疫性脑脊髓炎 (EAE) 小鼠模型,我们现在证明 CD8+ T 细胞对于介导 GA 的治疗作用是必要的。此外,GA 诱导的 CD8+ T 细胞的过继转移导致 EAE 的改善,确立了作为脱髓鞘疾病中可行的免疫疗法的作用。这些细胞的生成需要吲哚胺-2,3-双加氧酶 (IDO),而抑制功能取决于非经典 MHC I 类、IFN-γ 和穿孔素的表达。之前显示 GA 诱导的调节性骨髓细胞能够以不依赖于抗原的方式激活 CD4+ 调节性 T 细胞,但需要 CD8+ T 细胞来抑制体内疾病。这些研究证明了 CD8+ T 细胞在 GA 治疗中的重要作用,并确定了它们作为过继性免疫治疗剂的潜力。
The exact mechanism of glatiramer acetate (GA, Copaxone®), an FDA-approved immunomodulatory therapy for multiple sclerosis (MS), remains unclear after decades of research. Previously, we have shown that GA therapy of MS induces CD8+ T cell responses that can potentially suppress pathogenic CD4+ T cell responses. Using a murine model of MS, experimental autoimmune encephalomyelitis (EAE), we now demonstrate that CD8+ T cells are necessary in mediating the therapeutic effects of GA. Further, adoptive transfer of GA-induced CD8+ T cells resulted in amelioration of EAE, establishing a role as a viable immunotherapy in demyelinating disease. Generation of these cells required indoleamine-2,3-dioxygenase (IDO), while suppressive function depended on non-classical MHC class I, IFN-γ, and perforin expression. GA-induced regulatory myeloid cells, previously shown to activate CD4+ regulatory T cells in an antigen-independent manner, required CD8+ T cells for disease suppression in vivo. These studies demonstrate an essential role for CD8+ T cells in GA therapy and identify their potential as an adoptive immunotherapeutic agent.
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