PMID- 37034637 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240328 DP - 2023 Jun 24 TI - B cell and antibody targeting of transplant alloantigen epitopes is supported by both self and allo-recognition. LID - 2023.03.31.534734 [pii] LID - 10.1101/2023.03.31.534734 [doi] AB - Donor-specific antibody (DSA) responses against human leukocyte antigen (HLA) proteins mismatched between kidney transplant donors and recipients cause allograft loss. Using single-cell, molecular, structural, and proteomic techniques, we profiled the HLA-specific (alloreactive) B cell response in kidney and blood of a transplant recipient with antibody-mediated rejection (AMR). We identified 14 distinct alloreactive B cell lineages, which spanned the rejected organ and blood and expressed high-affinity anti-donor HLA-specific B cell receptors, many of which were clonally linked to circulating DSA. The alloreactive B cell response was focused on exposed, solvent-accessible mismatched HLA residues, while also demonstrating extensive contacts with self-HLA residues. Consistent with structural evidence of self-recognition, measurable self-reactivity by donor-specific B cells was common and positively correlated with anti-donor affinity maturation. Thus, allo- and self-reactive signatures appeared to converge, suggesting that during AMR, the recognition of non-self and breaches of tolerance conspire to produce a pathogenic donor-specific adaptive response. FAU - Killian, John T AU - Killian JT AUID- ORCID: 0000-0002-3702-9005 FAU - King, Rodney G AU - King RG FAU - Kizziah, James L AU - Kizziah JL FAU - Fucile, Christopher F AU - Fucile CF FAU - Diaz-Avalos, Ruben AU - Diaz-Avalos R FAU - Qiu, Shihong AU - Qiu S FAU - Silva-Sanchez, Aaron AU - Silva-Sanchez A FAU - Mousseau, Betty J AU - Mousseau BJ FAU - Macon, Kevin J AU - Macon KJ FAU - Callahan, Amanda R AU - Callahan AR FAU - Yang, Guang AU - Yang G FAU - Hossain, M Emon AU - Hossain ME FAU - Akther, Jobaida AU - Akther J FAU - Houp, Julie A AU - Houp JA FAU - Rosenblum, Frida D AU - Rosenblum FD FAU - Porrett, Paige M AU - Porrett PM FAU - Ong, Song C AU - Ong SC FAU - Kumar, Vineeta AU - Kumar V FAU - Saphire, Erica Ollmann AU - Saphire EO FAU - Kearney, John F AU - Kearney JF FAU - Randall, Troy D AU - Randall TD FAU - Rosenberg, Alexander F AU - Rosenberg AF FAU - Green, Todd J AU - Green TJ FAU - Lund, Frances E AU - Lund FE LA - eng GR - P30 AI027767/AI/NIAID NIH HHS/United States GR - T32 AI007051/AI/NIAID NIH HHS/United States GR - U19 AI142737/AI/NIAID NIH HHS/United States GR - T32 DK007545/DK/NIDDK NIH HHS/United States GR - S10 OD024978/OD/NIH HHS/United States GR - P30 CA013148/CA/NCI NIH HHS/United States PT - Preprint DEP - 20230624 PL - United States TA - bioRxiv JT - bioRxiv : the preprint server for biology JID - 101680187 PMC - PMC10081326 EDAT- 2023/04/11 06:00 MHDA- 2023/04/11 06:01 PMCR- 2023/06/26 CRDT- 2023/04/10 04:11 PHST- 2023/04/11 06:00 [pubmed] PHST- 2023/04/11 06:01 [medline] PHST- 2023/04/10 04:11 [entrez] PHST- 2023/06/26 00:00 [pmc-release] AID - 2023.03.31.534734 [pii] AID - 10.1101/2023.03.31.534734 [doi] PST - epublish SO - bioRxiv [Preprint]. 2023 Jun 24:2023.03.31.534734. doi: 10.1101/2023.03.31.534734.