PMID- 33945142 OWN - NLM STAT- MEDLINE DCOM- 20220623 LR - 20220627 IS - 1940-6029 (Electronic) IS - 1064-3745 (Linking) VI - 2454 DP - 2022 TI - CRISPR/Cas9 Ribonucleoprotein Complex-Mediated Efficient B2M Knockout in Human Induced Pluripotent Stem Cells (iPSCs). PG - 607-624 LID - 10.1007/7651_2021_352 [doi] AB - Advances in induced pluripotent stem cell (iPSC) technology provide a renewable source of cells for tissue regeneration and therefore hold great promise for cell replacement therapy. However, immune rejection of allograft due to human leukocyte antigen (HLA) mismatching remains a major challenge. Considerable efforts have been devoted to overcoming the immunogenicity of allograft transplantation. One of the approaches is an elimination of HLA molecules on the surface of allogeneic cells using genome editing technology to generate universal stem cells. Here, we present a simple and effective genome editing approach to knockout the beta-2-immunoglobulin (B2M) gene, which encodes B2M protein that forms a heterodimer with HLA class I proteins, in induced pluripotent stem cells (iPSCs) leading to HLA class I (HLA-I) depletion. We also describe detailed procedures for validation of the B2M-knockout iPSCs using flow cytometry, and genotypic analysis for potential off-target regions. Our protocol is also applicable for knocking out other genes in iPSCs and other cell types. CI - (c) 2021. Springer Science+Business Media, LLC. FAU - Thongsin, Nontaphat AU - Thongsin N AD - Siriraj Center for Regenerative Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. AD - Department of Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. FAU - Wattanapanitch, Methichit AU - Wattanapanitch M AD - Siriraj Center for Regenerative Medicine, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. methichit.wat@mahidol.ac.th. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 RN - 0 (HLA Antigens) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Ribonucleoproteins) SB - IM MH - CRISPR-Cas Systems MH - Gene Editing MH - HLA Antigens/genetics MH - Histocompatibility Antigens Class I/metabolism MH - Humans MH - *Induced Pluripotent Stem Cells MH - Ribonucleoproteins/metabolism OTO - NOTNLM OT - CRISPR/Cas9 OT - Gene knockout OT - HLA-I-null iPSCs OT - Human leukocyte antigens (HLAs) OT - Induced pluripotent stem cells (iPSCs) OT - Universal stem cells EDAT- 2021/05/05 06:00 MHDA- 2022/06/24 06:00 CRDT- 2021/05/04 12:41 PHST- 2021/05/05 06:00 [pubmed] PHST- 2022/06/24 06:00 [medline] PHST- 2021/05/04 12:41 [entrez] AID - 10.1007/7651_2021_352 [doi] PST - ppublish SO - Methods Mol Biol. 2022;2454:607-624. doi: 10.1007/7651_2021_352.