Therapeutic polyclonal human CD8+ CD25+ Fox3+ TNFR2+ PD-L1+ regulatory cells induced ex-vivo.

Therapeutic polyclonal human CD8+ CD25+ Fox3+ TNFR2+ PD-L1+ regulatory cells induced ex-vivo.
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DOI:
10.1016/j.clim.2013.08.007
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发表时间:
2013-12
期刊:
Clinical immunology (Orlando, Fla.)
影响因子:
--
通讯作者:
Zheng SG
Zheng SG
中科院分区:
其他
文献类型:
--
作者:
Horwitz DA;Pan S;Ou JN;Wang J;Chen M;Gray JD;Zheng SG

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我们报道了在体外一周内产生的具有抗cd3 /28微珠和细胞因子的多克隆CD8regs在TGF-β的维持下迅速表现出体外抑制活性。在免疫缺陷小鼠中,这些CD8regs对异种gvhd表现出明显的保护作用,IL-10依赖性活性。它们表达IL-2Rα/β、Foxp3、TNFR2和负共刺激受体CTLA-4、PD-1、PD-L1和Tim-3。体外抑制活性与TNFR2和PD-L1的相关性优于Foxp3。阻断研究表明,TNF可增强PD-L1的表达和CD8regs产生的抑制活性。与其他多克隆CD4和CD8 treg不同,这些CD8regs优先靶向同种异体T细胞,但即使在致敏后,它们也缺乏对它们的细胞毒性活性。与CD4regs不同,这些CD8regs可以产生IL-2并在抑制靶细胞的同时增殖。如果这些CD8regs可以在不损害免疫监视的情况下在外来宿主体内持续存在,它们可以作为一种实用的缓解诱导产品,用于治疗自身免疫性疾病、移植物抗宿主病和同种异体移植排斥反应。
We report that polyclonal CD8regs generated in one week ex-vivo with anti-CD3/28 beads and cytokines rapidly developed suppressive activity in vitro sustained by TGF-β. In immunodeficient mice, these CD8regs demonstrated a markedly protective, IL-10 dependent activity against a xeno-GVHD. They expressed IL-2Rα/β, Foxp3, TNFR2, and the negative co-stimulatory receptors CTLA-4, PD-1, PD-L1 and Tim-3. Suppressive activity in vitro correlated better with TNFR2 and PD-L1 than Foxp3. Blocking studies suggested that TNF enhanced PD-L1 expression and the suppressive activity of the CD8regs generated. Unlike other polyclonal CD4 and CD8 Tregs, these CD8regs preferentially targeted allogeneic T cells, but they lacked cytotoxic activity against them even after sensitization. Unlike CD4regs, these CD8regs could produce IL-2 and proliferate while inhibiting target cells. If these CD8regs can persist in foreign hosts without impairing immune surveillance, they could serve as a practical remission-inducing product for the treatment of autoimmune diseases, graft-versus-host disease, and allograft rejection.
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