PMID- 34705520 OWN - NLM STAT- MEDLINE DCOM- 20211101 LR - 20220910 IS - 1946-6242 (Electronic) IS - 1946-6234 (Print) IS - 1946-6234 (Linking) VI - 13 IP - 617 DP - 2021 Oct 27 TI - Alloantigen-specific type 1 regulatory T cells suppress through CTLA-4 and PD-1 pathways and persist long-term in patients. PG - eabf5264 LID - 10.1126/scitranslmed.abf5264 [doi] AB - Type 1 regulatory T (Tr1) cells are inducible, interleukin (IL)-10(+)FOXP3(-) regulatory T cells that can suppress graft-versus-host disease (GvHD) after allogeneic hematopoietic stem cell transplantation (allo-HSCT). We have optimized an in vitro protocol to generate a Tr1-enriched cell product called T-allo10, which is undergoing clinical evaluation in patients with hematological malignancies receiving a human leukocyte antigen (HLA)-mismatched allo-HSCT. Donor-derived T-allo10 cells are specific for host alloantigens, are anergic, and mediate alloantigen-specific suppression. In this study, we determined the mechanism of action of T-allo10 cells and evaluated survival of adoptively transferred Tr1 cells in patients. We showed that Tr1 cells, in contrast to the non-Tr1 population, displayed a restricted T cell receptor (TCR) repertoire, indicating alloantigen-induced clonal expansion. Tr1 cells also had a distinct transcriptome, including high expression of cytotoxic T lymphocyte-associated protein 4 (CTLA-4) and programmed cell death protein 1 (PD-1). Blockade of CTLA-4 or PD-1/PD-L1 abrogated T-allo10-mediated suppression, confirming that these proteins, in addition to IL-10, play key roles in Tr1-suppressive function and that Tr1 cells represent the active component of the T-allo10 product. Furthermore, T-allo10-derived Tr1 cells were detectable in the peripheral blood of HSCT patients up to 1 year after T-allo10 transfer. Collectively, we revealed a distinct molecular phenotype, mechanisms of action, and in vivo persistence of alloantigen-specific Tr1 cells. These results further characterize Tr1 cell biology and provide essential knowledge for the design and tracking of Tr1-based cell therapies. FAU - Chen, Pauline P AU - Chen PP AUID- ORCID: 0000-0002-4730-3370 AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Cepika, Alma-Martina AU - Cepika AM AUID- ORCID: 0000-0003-2862-1901 AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Agarwal-Hashmi, Rajni AU - Agarwal-Hashmi R AUID- ORCID: 0000-0002-3865-8866 AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Saini, Gopin AU - Saini G AUID- ORCID: 0000-0001-7842-1241 AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Center for Definitive and Curative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Uyeda, Molly J AU - Uyeda MJ AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Louis, David M AU - Louis DM AUID- ORCID: 0000-0002-6845-5437 AD - Institute for Immunity, Transplantation, and Infection, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Cieniewicz, Brandon AU - Cieniewicz B AUID- ORCID: 0000-0003-3268-7444 AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Narula, Mansi AU - Narula M AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Amaya Hernandez, Laura C AU - Amaya Hernandez LC AUID- ORCID: 0000-0002-8742-9111 AD - Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Harre, Nicholas AU - Harre N AUID- ORCID: 0000-0002-5377-9105 AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Xu, Liwen AU - Xu L AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Division of Blood and Marrow Transplantation, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Stanford Functional Genomics Facility, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Thomas, Benjamin Craig AU - Thomas BC AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Ji, Xuhuai AU - Ji X AUID- ORCID: 0000-0002-1768-6403 AD - Stanford Functional Genomics Facility, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Shiraz, Parveen AU - Shiraz P AUID- ORCID: 0000-0002-6721-0358 AD - Division of Blood and Marrow Transplantation, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Tate, Keri M AU - Tate KM AUID- ORCID: 0000-0001-8165-5049 AD - Stanford Laboratory for Cell and Gene Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Margittai, Dana AU - Margittai D AUID- ORCID: 0000-0003-2992-5931 AD - Stanford Laboratory for Cell and Gene Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Bhatia, Neehar AU - Bhatia N AUID- ORCID: 0000-0002-9829-1453 AD - Stanford Laboratory for Cell and Gene Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Meyer, Everett AU - Meyer E AUID- ORCID: 0000-0001-7953-853X AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Division of Blood and Marrow Transplantation, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Bertaina, Alice AU - Bertaina A AUID- ORCID: 0000-0002-3729-436X AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Center for Definitive and Curative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Davis, Mark M AU - Davis MM AUID- ORCID: 0000-0001-6868-657X AD - Institute for Immunity, Transplantation, and Infection, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Bacchetta, Rosa AU - Bacchetta R AUID- ORCID: 0000-0002-0606-6268 AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Center for Definitive and Curative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. FAU - Roncarolo, Maria Grazia AU - Roncarolo MG AUID- ORCID: 0000-0003-1636-1495 AD - Division of Hematology, Oncology, Stem Cell Transplantation, and Regenerative Medicine, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Center for Definitive and Curative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. AD - Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. LA - eng GR - P01 CA049605/CA/NCI NIH HHS/United States GR - P30 DK116074/DK/NIDDK NIH HHS/United States GR - S10 OD018220/OD/NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20211027 PL - United States TA - Sci Transl Med JT - Science translational medicine JID - 101505086 RN - 0 (CTLA-4 Antigen) RN - 0 (Isoantigens) RN - 0 (Programmed Cell Death 1 Receptor) SB - IM MH - CD4-Positive T-Lymphocytes MH - CTLA-4 Antigen MH - Humans MH - *Isoantigens MH - *Programmed Cell Death 1 Receptor MH - T-Lymphocytes, Regulatory PMC - PMC9451143 MID - NIHMS1780720 EDAT- 2021/10/28 06:00 MHDA- 2021/11/03 06:00 PMCR- 2022/09/07 CRDT- 2021/10/27 17:14 PHST- 2021/10/27 17:14 [entrez] PHST- 2021/10/28 06:00 [pubmed] PHST- 2021/11/03 06:00 [medline] PHST- 2022/09/07 00:00 [pmc-release] AID - 10.1126/scitranslmed.abf5264 [doi] PST - ppublish SO - Sci Transl Med. 2021 Oct 27;13(617):eabf5264. doi: 10.1126/scitranslmed.abf5264. Epub 2021 Oct 27.