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Stem Cells. 2018 Oct;36(10):1552-1566. doi: 10.1002/stem.2865. Epub 2018 Jul 29.

Repurposing the Cord Blood Bank for Haplobanking of HLA-Homozygous iPSCs and Their Usefulness to Multiple Populations.

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Department of Biomedical Science, CHA Stem Cell Institute, CHA University, Seongnam-si, Gyeonggi-do, Republic of Korea.
Department of Laboratory Medicine, CHA Bundang Medical Center, CHA University, Seongnam-si, Gyeonggi-do, Republic of Korea.
Histocompatibility and Immunogenetics Laboratory, Royal Infirmary of Edinburgh, Edinburgh, UK.
Advanced Therapeutics, Scottish National Blood Transfusion Service, Edinburgh, UK.
HLA Informatics Group, Anthony Nolan Research Institute, Royal Free Campus, London, UK.
UCL Cancer Institute, University College London, London, UK.
Bioinformatics Team, Theragen Etex Bio Institute, Suwon-si, Gyeonggi-do, Republic of Korea.
Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan.
Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Ibaraki, Japan.
New York Stem Cell Foundation Research Institute, New York, New York, USA.
Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Berlin, Germany.
International Stem Cell Banking Initiative, Hertfordshire, UK.
Global Alliance for iPSC Therapies, The Jack Copland Centre, Edinburgh, UK.


Although autologous induced pluripotent stem cells (iPSCs) can potentially be useful for treating patients without immune rejection, in reality it will be extremely expensive and labor-intensive to make iPSCs to realize personalized medicine. An alternative approach is to make use of human leukocyte antigen (HLA) haplotype homozygous donors to provide HLA matched iPSC products to significant numbers of patients. To establish a haplobank of iPSCs, we repurposed the cord blood bank by screening ∼4,200 high resolution HLA typed cord blood samples, and selected those homozygous for the 10 most frequent HLA-A,-B,-DRB1 haplotypes in the Korean population. Following the generation of 10 iPSC lines, we conducted a comprehensive characterization, including morphology, expression of pluripotent markers and cell surface antigens, three-germ layer formation, vector clearance, mycoplasma/microbiological/viral contamination, endotoxin, and short tandem repeat (STR) assays. Various genomic analyses using microarray and comparative genomic hybridization (aCGH)-based single nucleotide polymorphism (SNP) and copy number variation (CNV) were also conducted. These 10 HLA-homozygous iPSC lines match 41.07% of the Korean population. Comparative analysis of HLA population data shows that they are also of use in other Asian populations, such as Japan, with some limited utility in ethnically diverse populations, such as the UK. Taken together, the generation of the 10 most frequent Korean HLA-homozygous iPSC lines serves as a useful pointer for the development of optimal methods for iPSC generation and quality control and indicates the benefits and limitations of collaborative HLA driven selection of donors for future stocking of worldwide iPSC haplobanks. Stem Cells 2018;36:1552-1566.


Cord blood banks ; Genomic stability ; Haplobanking ; Human leukocyte antigen ; Immune rejection; Induced pluripotent stem cells

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