HLA-E-expressing pluripotent stem cells escape allogeneic responses and lysis by NK cells.

HLA-E-expressing pluripotent stem cells escape allogeneic responses and lysis by NK cells.
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DOI:
10.1038/nbt.3860
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发表时间:
2017-08
影响因子:
46.9
通讯作者:
Russell DW
Russell DW
中科院分区:
工程技术1区
文献类型:
--
作者:
Gornalusse GG;Hirata RK;Funk SE;Riolobos L;Lopes VS;Manske G;Prunkard D;Colunga AG;Hanafi LA;Clegg DO;Turtle C;Russell DW

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人类白细胞抗原(HLA)I类基因的多态性可导致异基因受者对多能干细胞(PSC)衍生产物的排斥反应。β-2微球蛋白(B2 M)基因的破坏消除了所有I类分子的表面表达,但使细胞易于被自然杀伤(NK)细胞裂解。在这里,我们表明,这种“自我缺失”的反应可以通过强制表达的最低多态性HLA-E分子来预防。我们使用腺相关病毒(AAV)介导的基因编辑在人PSC中的B2 M基因座敲入HLA-E基因,其方式是赋予HLA-E单链二聚体(与B2 M融合)或三聚体(与B2 M和肽抗原融合)的可诱导、可调控的表面表达,而不表达HLA-A、B或C。这些HLA工程化的PSC及其分化的衍生物不被CD 8 + T细胞识别为同种异体的,不结合抗HLA抗体,并且对NK介导的裂解具有抗性。我们的方法为分化衍生物缺乏HLA II类表达的应用提供了通用供体细胞的潜在来源。
Polymorphisms in the human leukocyte antigen (HLA) class I genes can cause the rejection of pluripotent stem cell (PSC)-derived products in allogeneic recipients. Disruption of the Beta-2 Microglobulin (B2M) gene eliminates surface expression of all class I molecules, but leaves the cells vulnerable to lysis by natural killer (NK) cells. Here we show that this ‘missing self’ response can be prevented by forced expression of minimally polymorphic HLA-E molecules. We use adeno-associated virus (AAV)-mediated gene editing to knock in HLA-E genes at the B2M locus in human PSCs in a manner that confers inducible, regulated, surface expression of HLA-E single-chain dimers (fused to B2M) or trimers (fused to B2M and a peptide antigen), without surface expression of HLA-A, B or C. These HLA-engineered PSCs and their differentiated derivatives are not recognized as allogeneic by CD8+ T cells, do not bind anti-HLA antibodies, and are resistant to NK-mediated lysis. Our approach provides a potential source of universal donor cells for applications where the differentiated derivatives lack HLA class II expression.
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