PMID- 35694562 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220716 IS - 2468-0249 (Electronic) IS - 2468-0249 (Linking) VI - 7 IP - 6 DP - 2022 Jun TI - Study Design: Human Leukocyte Antigen Class I Molecule A( *)02-Chimeric Antigen Receptor Regulatory T Cells in Renal Transplantation. PG - 1258-1267 LID - 10.1016/j.ekir.2022.03.030 [doi] AB - INTRODUCTION: Cell therapy with regulatory T cells (Tregs) in solid organ transplantation is a promising approach for the prevention of graft rejection and induction of immunologic tolerance. Previous clinical studies have demonstrated the safety of Tregs in renal transplant recipients. Antigen-specific Tregs, such as chimeric antigen receptor (CAR)-Tregs, are expected to be more efficacious than polyclonal Tregs in homing to the target antigen. We have developed an autologous cell therapy (TX200-TR101) where a human leukocyte antigen (HLA) class I molecule A( *)02 (HLA-A( *)02)-CAR is introduced into autologous naive Tregs from a patient with HLA-A( *)02-negative end-stage renal disease (ESRD) awaiting an HLA-A( *)02-positive donor kidney. METHODS: This article describes the design of the STEADFAST study, a first-in-human, phase I/IIa, multicenter, open-label, single-ascending dose, dose-ranging study to assess TX200-TR101 in living-donor renal transplant recipients. Up to 15 transplant recipients will receive TX200-TR101 and will be followed up for a total of 84 weeks post-transplant, alongside a control cohort of up to 6 transplant recipients. All transplant recipients will receive a standard of care immunosuppressive regimen, with the intent of intensified tapering of the regimen in the TX200-TR101 cohort. RESULTS: The primary end point is the incidence and severity of treatment-emergent adverse events (AEs) within 28 days post-TX200-TR101 infusion. Other end points include additional safety parameters, clinical and renal outcome parameters, and the evaluation of biomarkers. CONCLUSION: The STEADFAST study represents the next frontier in adoptive cell therapies. TX200-TR101 holds great potential to prevent immune-mediated graft rejection and induce immunologic tolerance after HLA-A( *)02-mismatched renal transplantation. CI - (c) 2022 International Society of Nephrology. Published by Elsevier Inc. FAU - Schreeb, Katharina AU - Schreeb K AD - Sangamo Therapeutics France, Valbonne, France. FAU - Culme-Seymour, Emily AU - Culme-Seymour E AD - Sangamo Therapeutics France, Valbonne, France. FAU - Ridha, Essra AU - Ridha E AD - Sangamo Therapeutics France, Valbonne, France. FAU - Dumont, Celine AU - Dumont C AD - Sangamo Therapeutics France, Valbonne, France. FAU - Atkinson, Gillian AU - Atkinson G AD - Sangamo Therapeutics France, Valbonne, France. FAU - Hsu, Ben AU - Hsu B AD - Sangamo Therapeutics France, Valbonne, France. FAU - Reinke, Petra AU - Reinke P AD - Berlin Center for Advanced Therapies (BeCAT), Berlin Institute of Health (BIH) Center for Regenerative Therapies (BCRT), Charite Universitaetsmedizin Berlin, Berlin, Germany. LA - eng PT - Journal Article DEP - 20220406 PL - United States TA - Kidney Int Rep JT - Kidney international reports JID - 101684752 PMC - PMC9174048 OTO - NOTNLM OT - CAR-Tregs OT - HLA-A *02 mismatch OT - acute and chronic kidney rejection OT - end-stage renal disease OT - immunotherapy OT - living-donor kidney transplantation EDAT- 2022/06/14 06:00 MHDA- 2022/06/14 06:01 PMCR- 2022/04/06 CRDT- 2022/06/13 03:34 PHST- 2021/12/09 00:00 [received] PHST- 2022/03/04 00:00 [revised] PHST- 2022/03/28 00:00 [accepted] PHST- 2022/06/13 03:34 [entrez] PHST- 2022/06/14 06:00 [pubmed] PHST- 2022/06/14 06:01 [medline] PHST- 2022/04/06 00:00 [pmc-release] AID - S2468-0249(22)01250-5 [pii] AID - 10.1016/j.ekir.2022.03.030 [doi] PST - epublish SO - Kidney Int Rep. 2022 Apr 6;7(6):1258-1267. doi: 10.1016/j.ekir.2022.03.030. eCollection 2022 Jun.