PMID- 32439978 OWN - NLM STAT- MEDLINE DCOM- 20201201 LR - 20210521 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 10 IP - 1 DP - 2020 May 21 TI - Generation and characterization of HLA-universal platelets derived from induced pluripotent stem cells. PG - 8472 LID - 10.1038/s41598-020-65577-x [doi] LID - 8472 AB - Platelet demand has increased around the world. However, the inadequacy of donors, the risk of transfusion-transmitted infections and associated reactions, and the refractory nature of platelet transfusions are among the limitations of allogeneic platelet transfusions. To alleviate these problems, we propose generating platelets in a laboratory that do not induce alloimmunity to human leukocyte antigen (HLA) class I, which is a major cause of immune reaction in platelet transfusion refractoriness. Induced pluripotent stem cells (iPSCs) were generated from peripheral blood mononuclear cells (PBMCs) of a healthy Thai woman. We then knocked out the beta2-microglobulin (beta2m) gene in the cells using paired CRISPR/Cas9 nickases and sequentially differentiated the cells into haematopoietic stem cells (HSCs), megakaryocytes (MKs) and platelets. Silencing of HLA class I expression was observed on the cell surface of beta2m-knockout iPSCs, iPSC-derived HSCs, MKs and platelets. The HLA-universal iPSC-derived platelets were shown to be activated, and they aggregated after stimulation. In addition, our in vivo platelet survival experiments demonstrated that human platelets were detectable at 2 and 24 hours after injecting the beta2m-KO MKs. In summary, we successfully generated functional iPSC-derived platelets in vitro without HLA class I expression by knocking out the beta2m gene using paired CRISPR/Cas9 nickases. FAU - Norbnop, Phatchara AU - Norbnop P AD - Doctor of Philosophy Program in Medical Sciences, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. AD - Center of Excellence for Medical Genomics, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. FAU - Ingrungruanglert, Praewphan AU - Ingrungruanglert P AD - Stem Cell and Cell Therapy Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. AD - Department of Pharmacology, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. FAU - Israsena, Nipan AU - Israsena N AD - Stem Cell and Cell Therapy Research Unit, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. AD - Department of Pharmacology, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. FAU - Suphapeetiporn, Kanya AU - Suphapeetiporn K AD - Center of Excellence for Medical Genomics, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. kanya.su@chula.ac.th. AD - Excellence Center for Genomics and Precision Medicine, King Chulalongkorn Memorial Hospital, the Thai Red Cross Society, Bangkok, 10330, Thailand. kanya.su@chula.ac.th. FAU - Shotelersuk, Vorasuk AU - Shotelersuk V AD - Center of Excellence for Medical Genomics, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand. AD - Excellence Center for Genomics and Precision Medicine, King Chulalongkorn Memorial Hospital, the Thai Red Cross Society, Bangkok, 10330, Thailand. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200521 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Animals MH - Blood Platelets/*cytology/metabolism MH - Cell Differentiation MH - Female MH - Hematopoietic Stem Cells/*cytology/metabolism MH - Histocompatibility Antigens Class I/*metabolism MH - Humans MH - Induced Pluripotent Stem Cells/*cytology/metabolism MH - Leukocytes, Mononuclear/*cytology/metabolism MH - Megakaryocytes/*cytology/metabolism MH - Mice MH - Mice, Inbred NOD MH - Mice, SCID PMC - PMC7242456 COIS- The authors declare no competing interests. EDAT- 2020/05/23 06:00 MHDA- 2020/12/02 06:00 PMCR- 2020/05/21 CRDT- 2020/05/23 06:00 PHST- 2020/02/14 00:00 [received] PHST- 2020/04/22 00:00 [accepted] PHST- 2020/05/23 06:00 [entrez] PHST- 2020/05/23 06:00 [pubmed] PHST- 2020/12/02 06:00 [medline] PHST- 2020/05/21 00:00 [pmc-release] AID - 10.1038/s41598-020-65577-x [pii] AID - 65577 [pii] AID - 10.1038/s41598-020-65577-x [doi] PST - epublish SO - Sci Rep. 2020 May 21;10(1):8472. doi: 10.1038/s41598-020-65577-x.