PMID- 37511568 OWN - NLM STAT- MEDLINE DCOM- 20230731 LR - 20230731 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 24 IP - 14 DP - 2023 Jul 22 TI - Hypoimmunogenic Human Pluripotent Stem Cells as a Powerful Tool for Liver Regenerative Medicine. LID - 10.3390/ijms241411810 [doi] LID - 11810 AB - Induced pluripotent stem cells (iPSC) have huge potential as cell therapy for various diseases, given their potential for unlimited self-renewal and capability to differentiate into a wide range of cell types. Although autologous iPSCs represents the ideal source for patient-tailored regenerative medicine, the high costs of the extensive and time-consuming production process and the impracticability for treating acute conditions hinder their use for broad applications. An allogeneic iPSC-based strategy may overcome these issues, but it carries the risk of triggering an immune response. So far, several approaches based on genome-editing techniques to silence human leukocyte antigen class I (HLA-I) or II (HLA-II) expression have been explored to overcome the immune rejection of allogeneic iPSCs. In this study, we employed the CRISPR/Cas9 (clustered regularly interspaced short palindromic repeats/CRISPR associated protein 9) system to delete the beta2-Microglobulin (B2M) and the Class II Major Histocompatibility Complex Transactivator (CIITA) genes, essential for the correct surface expression of HLA-I and HLA-II proteins. The resulting hypoimmunogenic iPSC line has a normal karyotype, expresses the pluripotency stem cell markers, and is capable of differentiating into the three embryonic germ layers. Furthermore, we showed that it specifically retains the ability to differentiate towards different liver cells, such as endothelial-like cells, hepatocyte-like cells, and hepatic stellate-like cells. Our results indicate that hypoimmunogenic iPSCs could give a new cost-effective and off-the-shelf opportunity for cell therapy in liver diseases. FAU - Trionfini, Piera AU - Trionfini P AUID- ORCID: 0000-0002-6599-0709 AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Romano, Elena AU - Romano E AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Varinelli, Marco AU - Varinelli M AUID- ORCID: 0000-0001-9046-9555 AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Longaretti, Lorena AU - Longaretti L AUID- ORCID: 0000-0002-4366-4152 AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Rizzo, Paola AU - Rizzo P AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Giampietro, Roberta AU - Giampietro R AUID- ORCID: 0000-0002-2349-5224 AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Caroli, Annalina AU - Caroli A AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Aiello, Sistiana AU - Aiello S AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Todeschini, Marta AU - Todeschini M AUID- ORCID: 0000-0003-3422-8815 AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Casiraghi, Federica AU - Casiraghi F AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Remuzzi, Giuseppe AU - Remuzzi G AUID- ORCID: 0000-0002-6194-3446 AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Benigni, Ariela AU - Benigni A AUID- ORCID: 0000-0002-4721-5485 AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. FAU - Tomasoni, Susanna AU - Tomasoni S AUID- ORCID: 0000-0002-7212-2512 AD - Istituto di Ricerche Farmacologiche Mario Negri IRCCS, 24126 Bergamo, Italy. LA - eng GR - GGP20073/Telethon Foundation/ GR - NA/Roche (Italy)/ PT - Journal Article DEP - 20230722 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Histocompatibility Antigens Class I) SB - IM MH - Humans MH - Regenerative Medicine MH - *Pluripotent Stem Cells MH - Gene Editing/methods MH - *Induced Pluripotent Stem Cells MH - Histocompatibility Antigens Class I/genetics/metabolism MH - Liver PMC - PMC10380710 OTO - NOTNLM OT - cell therapy OT - endothelial cells OT - hepatic stellate cells OT - hepatocytes OT - hypoimmunogenic iPSC OT - regenerative medicine COIS- The authors declare no conflict of interest. EDAT- 2023/07/29 11:50 MHDA- 2023/07/31 06:43 PMCR- 2023/07/22 CRDT- 2023/07/29 01:25 PHST- 2023/06/07 00:00 [received] PHST- 2023/07/13 00:00 [revised] PHST- 2023/07/19 00:00 [accepted] PHST- 2023/07/31 06:43 [medline] PHST- 2023/07/29 11:50 [pubmed] PHST- 2023/07/29 01:25 [entrez] PHST- 2023/07/22 00:00 [pmc-release] AID - ijms241411810 [pii] AID - ijms-24-11810 [pii] AID - 10.3390/ijms241411810 [doi] PST - epublish SO - Int J Mol Sci. 2023 Jul 22;24(14):11810. doi: 10.3390/ijms241411810.