dc.contributor.author | Ball, JA | en_US |
dc.contributor.author | Clear, AJ | en_US |
dc.contributor.author | Aries, J | en_US |
dc.contributor.author | Charrot, S | en_US |
dc.contributor.author | Besley, C | en_US |
dc.contributor.author | Mee, M | en_US |
dc.contributor.author | Stagg, A | en_US |
dc.contributor.author | Lindsay, JO | en_US |
dc.contributor.author | Cavenagh, J | en_US |
dc.contributor.author | Calaminici, M | en_US |
dc.contributor.author | Gribben, JG | en_US |
dc.contributor.author | Davies, JK | en_US |
dc.date.accessioned | 2020-09-17T13:06:48Z | |
dc.date.available | 2020-08-25 | en_US |
dc.date.issued | 2020-09-09 | en_US |
dc.identifier.uri | https://qmro.qmul.ac.uk/xmlui/handle/123456789/67084 | |
dc.description.abstract | Gastrointestinal (GI) graft-versus-host disease (GvHD) is a major barrier in allogeneic hematopoietic stem-cell transplantation (AHST). The metabolite retinoic acid (RA) potentiates GI-GvHD in mice via alloreactive T-cells expressing the RA-receptor-alpha (RARα), but the role of RA-responsive cells in human GI-GvHD remains undefined. We therefore used conventional and novel sequential immunostaining and flow cytometry to scrutinize RA-responsive T-cells in tissues and blood of AHST patients and characterize the impact of RA on human T-cell alloresponses. Expression of RARα by human mononuclear cells was increased after RA exposure. RARαhi mononuclear cells were increased in GI-GvHD tissue, contained more cellular RA-binding proteins, localized with tissue damage and correlated with GvHD severity and mortality. Using a targeted candidate protein approach we predicted the phenotype of RA-responsive T-cells in the context of increased microenvironmental IL-23. Sequential immunostaining confirmed the presence of a population of RARahi CD8 T-cells with the predicted phenotype, co-expressing the effector T-cell transcription factor T-bet and the IL-23-specific receptor. These cells were increased in GI- but not skin-GvHD tissues and were also selectively expanded in GI-GvHD patient blood. Finally, functional approaches demonstrated RA predominantly increased alloreactive GI-tropic RARahi CD8 effector T-cells, including cells with the phenotype identified in vivo. IL-23-rich conditions potentiated this effect by selectively increasing b7 integrin expression on CD8 effector T-cells and reducing CD4 T-cells with a regulatory cell phenotype. In conclusion we have identified a population of RA-responsive effector T-cells with a distinctive phenotype which are selectively expanded in human GI-GvHD and represent a potential new therapeutic target. | en_US |
dc.language | eng | en_US |
dc.relation.ispartof | Blood | en_US |
dc.title | Retinoic acid-responsive CD8 effector T-cells are selectively increased in IL-23-rich tissue in gastrointestinal GvHD. | en_US |
dc.type | Article | |
dc.rights.holder | Copyright © 2020 American Society of Hematology | |
dc.identifier.doi | 10.1182/blood.2020005170 | en_US |
pubs.author-url | https://www.ncbi.nlm.nih.gov/pubmed/32905596 | en_US |
pubs.notes | Not known | en_US |
pubs.publication-status | Published online | en_US |
dcterms.dateAccepted | 2020-08-25 | en_US |
rioxxterms.funder | Default funder | en_US |
rioxxterms.identifier.project | Default project | en_US |