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2021年1月29日 · After knocking-out surface expression of HLA class I molecules by targeting the B2M gene via CRISPR/Cas9, we also co-expressed a single-chain HLA-E molecule, thereby preventing NK cell fratricide of B2M-knockout (KO) cells via "missing self"-induced lysis. Importantly, these genetically engineered NK cells were functionally indistinguishable ...

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2021年5月5日 · Schematic summary of the process of establishing HLA-A deficient HEK293T cells using dual gRNA CRISPR/Cas9-mediated gene KO. To obtain a large deletion within the HLA-A gene, we co-transfected the cells with two plasmids containing the GFP gene and two different gRNAs.

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2022年3月1日 · Here, we generated a B2M homozygous knockout somatic cell nuclear transfer-induced embryonic stem cell (SCNT-ESC) line using CRISPR/Cas9-mediated gene targeting. B2M KO cell line, which does not express HLA-I molecules on cell surface, has pluripotency and differentiation ability to three germ layers.

2019年4月4日 · Here, we show two genome-editing strategies for making immunocompatible donor iPSCs. First, we generated HLA pseudo-homozygous iPSCs with allele-specific editing of HLA heterozygous iPSCs. Second, we generated HLA-C-retained iPSCs by disrupting both HLA-A and -B alleles to suppress the NK cell response while maintaining antigen presentation.

2019年3月15日 · Comprehensive knockout of HLA class II (HLA-II) β-chain genes is complicated by their high polymorphism. In this study, we developed CRISPR/Cas9 genome editing to simultaneously target HLA-DRB, -DQB1, and -DPB1 through a single guide RNA recognizing a conserved region in exon 2.

2021年1月28日 · Our study demonstrates the feasibility of genome editing in primary allogeneic NK cells to diminish their recognition and killing by mismatched T cells and is an important prerequisite for using non-HLA-matched primary human NK cells as readily available, “off-the-shelf” immune effectors for a variety of immunotherapy indications in human cancer.