Proinflammatory Dual Receptor T Cells in Chronic Graft-versus-Host Disease.

Proinflammatory Dual Receptor T Cells in Chronic Graft-versus-Host Disease.
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DOI:
10.1016/j.bbmt.2017.07.016
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发表时间:
2017-11
期刊:
Biology of blood and marrow transplantation : journal of the American Society for Blood and Marrow Transplantation
影响因子:
--
通讯作者:
Morris GP
Morris GP
中科院分区:
其他
文献类型:
--
作者:
Balakrishnan A;Gloude N;Sasik R;Ball ED;Morris GP

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移植后胸腺生成缺陷与慢性移植物抗宿主病(GVHD)有关,GVHD是一种多器官病理,影响异基因造血干细胞移植(HSCT)后高达80%的患者。以前的工作表明,表达2个T细胞受体(TCR)的T细胞亚群易于发生同种异体反应,在小鼠模型和HSCT患者的急性GVHD中驱动选择性和不成比例的活性。在这里,我们研究了这种致病T细胞亚群在慢性移植物抗宿主病(CGVHD)中的潜在作用。伴有cGVHD的HSCT患者外周血中双TCR细胞数量增多。这些双重受体细胞具有激活的表型,表明在cGVHD中起着积极的作用。值得注意的是,单细胞RNA测序发现cGVHD中增加的双TCR细胞主要表达Tbet,表明有促炎表型。这些结果确定双TCR细胞是cGVHD潜在致病炎症的特异性介质,并强调了Tbet驱动的T细胞功能是潜在的治疗靶向的潜在途径。
Defective post-transplantation thymopoiesis is associated with chronic graft-versus-host disease (GVHD), a multiorgan pathology affecting up to 80% of patients after allogeneic hematopoietic stem cell transplantation (HSCT). Previous work demonstrated that the subset of T cells expressing 2 T cell receptors (TCRs) is predisposed to alloreactivity, driving selective and disproportionate activity in acute GVHD in both mouse models and HSCT patients. Here we investigate a potential role for this pathogenic T cell subset in chronic GVHD (cGVHD). HSCT patients with cGVHD demonstrated increased numbers of dual TCR cells in circulation. These dual receptor cells had an activated phenotype, indicating an active role in cGVHD. Notably, single-cell RNA sequencing identified the increased dual TCR cells in cGVHD as predominantly expressing Tbet, indicative of a proinflammatory phenotype. These results identify dual TCR cells as specific mediators of pathogenic inflammation underlying cGVHD and highlight Tbet-driven T cell function as a potential pathway for potential therapeutic targeting.
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