PMID- 33816057 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220421 IS - 2196-3029 (Print) IS - 2196-3029 (Electronic) VI - 7 IP - 3 DP - 2020 Sep TI - CAR-Tregs as a Strategy for Inducing Graft Tolerance. PG - 205-214 LID - 10.1007/s40472-020-00285-z [doi] AB - PURPOSE OF THE REVIEW: The adoptive transfer of alloantigen-specific regulatory T cells (Tregs) following organ transplantation is an emerging treatment paradigm that may induce tolerance and reduce the risk for graft rejection. In particular, redirecting Treg specificity via expression of synthetic chimeric antigen receptors (CARs) has demonstrated therapeutic promise in several preclinical studies. In this review, we highlight recent progress and remaining barriers to the clinical translation of CAR-Treg therapies. RECENT FINDINGS: CAR Tregs targeting human leukocyte antigen (HLA)-A2 showed antigen-specific in vitro activation and superior in vivo protective function relative to polyclonal Tregs. Adoptively transferred anti-HLA-A2 CAR Tregs prolonged the survival of HLA-A2-positive grafts in humanized mouse models. SUMMARY: Donor HLA molecules are attractive candidate antigens to target with CAR Tregs in transplantation due to mismatched HLA only expressed on the transplanted organ. The feasibility of this approach has been demonstrated by several independent groups in recent years. However, substantial challenges in CAR design and preclinical modeling must be more extensively addressed prior to clinical application. FAU - Wagner, Johanna C AU - Wagner JC AD - Division of Transplantation, Department of Surgery, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, USA. AD - University Hospital Wurzburg, Department of General, Visceral, Transplantation, Vascular and Pediatric Surgery, Oberdurrbacherstr. 6, 97080 Wurzburg, Germany. FAU - Tang, Qizhi AU - Tang Q AD - Division of Transplantation, Department of Surgery, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, USA. AD - UCSF Diabetes Center, University of California San Francisco, 513 Parnassus Ave, San Francisco, CA 94143, USA. LA - eng GR - U01 AI110658/AI/NIAID NIH HHS/United States GR - UC4 DK116264/DK/NIDDK NIH HHS/United States PT - Journal Article DEP - 20200704 PL - Switzerland TA - Curr Transplant Rep JT - Current transplantation reports JID - 101624626 PMC - PMC8011668 MID - NIHMS1609308 OTO - NOTNLM OT - CAR OT - HLA OT - Tregs OT - tolerance OT - transplantation EDAT- 2021/04/06 06:00 MHDA- 2021/04/06 06:01 PMCR- 2021/09/01 CRDT- 2021/04/05 06:06 PHST- 2021/04/05 06:06 [entrez] PHST- 2021/04/06 06:00 [pubmed] PHST- 2021/04/06 06:01 [medline] PHST- 2021/09/01 00:00 [pmc-release] AID - 10.1007/s40472-020-00285-z [doi] PST - ppublish SO - Curr Transplant Rep. 2020 Sep;7(3):205-214. doi: 10.1007/s40472-020-00285-z. Epub 2020 Jul 4.