PMID- 32578199 OWN - NLM STAT- MEDLINE DCOM- 20210119 LR - 20211102 IS - 1365-2249 (Electronic) IS - 0009-9104 (Print) IS - 0009-9104 (Linking) VI - 202 IP - 2 DP - 2020 Nov TI - The suppressive effect on CD4 T cell alloresponse against endothelial HLA-DR via PD-L1 induced by anti-A/B ligation. PG - 249-261 LID - 10.1111/cei.13482 [doi] AB - While donor-specific human leukocyte antigen (HLA) antibodies are a frequent cause for chronic antibody-mediated rejection in organ transplantation, this is not the case for antibodies targeting blood group antigens, as ABO-incompatible (ABO-I) organ transplantation has been associated with a favorable graft outcome. Here, we explored the role of CD4 T cell-mediated alloresponses against endothelial HLA-D-related (DR) in the presence of anti-HLA class I or anti-A/B antibodies. CD4 T cells, notably CD45RA-memory CD4 T cells, undergo extensive proliferation in response to endothelial HLA-DR. The CD4 T cell proliferative response was enhanced in the presence of anti-HLA class I, but attenuated in the presence of anti-A/B antibodies. Microarray analysis and molecular profiling demonstrated that the expression of CD274 programmed cell death ligand 1 (PD-L1) increased in response to anti-A/B ligation-mediated extracellular signal-regulated kinase (ERK) inactivation in endothelial cells that were detected even in the presence of interferon-gamma stimulation. Anti-PD-1 antibody enhanced CD4 T cell proliferation, and blocked the suppressive effect of the anti-A/B antibodies. Educated CD25(+) CD127(-) regulatory T cells (edu.T(regs) ) were more effective at preventing CD4 T cell alloresponses to endothelial cells compared with naive T(reg) ; anti-A/B antibodies were not involved in the T(reg) -mediated events. Finally, amplified expression of transcript encoding PD-L1 was observed in biopsy samples from ABO-I renal transplants when compared with those from ABO-identical/compatible transplants. Taken together, our findings identified a possible factor that might prevent graft rejection and thus contribute to a favorable outcome in ABO-I renal transplantation. CI - (c) 2020 British Society for Immunology. FAU - Iwasaki, K AU - Iwasaki K AUID- ORCID: 0000-0003-3229-5192 AD - Department of Kidney Disease and Transplant Immunology, Aichi Medical University School of Medicine, Nagakute, Japan. FAU - Hamana, H AU - Hamana H AD - Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan. FAU - Kishi, H AU - Kishi H AD - Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan. FAU - Yamamoto, T AU - Yamamoto T AD - Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan. FAU - Hiramitsu, T AU - Hiramitsu T AD - Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan. FAU - Okad, M AU - Okad M AD - Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan. FAU - Tomosugi, T AU - Tomosugi T AD - Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan. FAU - Takeda, A AU - Takeda A AD - Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan. FAU - Narumi, S AU - Narumi S AD - Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan. FAU - Watarai, Y AU - Watarai Y AD - Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan. FAU - Miwa, Y AU - Miwa Y AD - Department of Kidney Disease and Transplant Immunology, Aichi Medical University School of Medicine, Nagakute, Japan. FAU - Okumura, M AU - Okumura M AD - Department of Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan. FAU - Matsuoka, Y AU - Matsuoka Y AD - Department of Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan. FAU - Horimi, K AU - Horimi K AD - Department of Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan. FAU - Muraguchi, A AU - Muraguchi A AD - Department of Immunology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan. FAU - Kobayash, T AU - Kobayash T AD - Department of Renal Transplant Surgery, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200718 PL - England TA - Clin Exp Immunol JT - Clinical and experimental immunology JID - 0057202 RN - 0 (ABO Blood-Group System) RN - 0 (B7-H1 Antigen) RN - 0 (CD274 protein, human) RN - 0 (HLA-DR Antigens) RN - 0 (Isoantibodies) SB - IM MH - ABO Blood-Group System/*immunology MH - B7-H1 Antigen/*immunology MH - Endothelial Cells/*immunology/pathology MH - Graft Rejection/immunology/pathology MH - HLA-DR Antigens/*immunology MH - Humans MH - Isoantibodies/*immunology MH - *Organ Transplantation MH - T-Lymphocytes, Regulatory/*immunology/pathology PMC - PMC7597605 OTO - NOTNLM OT - PD-L1 OT - T cell receptor OT - accommodation OT - alloresponse OT - antibody-mediated rejection OT - kidney transplantation COIS- The authors have no financial conflicts of interest. EDAT- 2020/06/25 06:00 MHDA- 2021/01/20 06:00 PMCR- 2021/11/01 CRDT- 2020/06/25 06:00 PHST- 2020/04/15 00:00 [received] PHST- 2020/05/27 00:00 [revised] PHST- 2020/06/15 00:00 [accepted] PHST- 2020/06/25 06:00 [pubmed] PHST- 2021/01/20 06:00 [medline] PHST- 2020/06/25 06:00 [entrez] PHST- 2021/11/01 00:00 [pmc-release] AID - CEI13482 [pii] AID - 10.1111/cei.13482 [doi] PST - ppublish SO - Clin Exp Immunol. 2020 Nov;202(2):249-261. doi: 10.1111/cei.13482. Epub 2020 Jul 18.