Donor T-cell-derived GM-CSF drives alloantigen presentation by dendritic cells in the gastrointestinal tract.
Journal
Blood advances
ISSN: 2473-9537
Titre abrégé: Blood Adv
Pays: United States
ID NLM: 101698425
Informations de publication
Date de publication:
08 10 2019
08 10 2019
Historique:
received:
20
02
2019
accepted:
22
08
2019
entrez:
6
10
2019
pubmed:
6
10
2019
medline:
10
9
2020
Statut:
ppublish
Résumé
Granulocyte-macrophage colony-stimulating factor (GM-CSF) has recently emerged as an important pathogenic cytokine in acute graft-versus-host disease (GVHD), but the nature of the T-cell lineages secreting the cytokine and the mechanisms of action are less clear. Here we used interleukin 17A-fate reporter systems with transcriptional analysis and assays of alloantigen presentation to interrogate the origins of GM-CSF-secreting T cells and the effects of the cytokine on antigen-presenting cell (APC) function after experimental allogeneic stem cell transplantation (SCT). We demonstrated that although GM-CSF-secreting Th17 and non-Th17 cells expanded in the colon over time after SCT, the Th17 lineage expanded to represent 10% to 20% of the GM-CSF secreting T cells at this site by 4 weeks. Donor T-cell-derived GM-CSF expanded alloantigen-presenting donor dendritic cells (DCs) in the colon and lymph nodes. In the mesenteric lymph nodes, GM-CSF-dependent DCs primed donor T cells and amplified acute GVHD in the colon. We thus describe a feed-forward cascade whereby GM-CSF-secreting donor T cells accumulate and drive alloantigen presentation in the colon to amplify GVHD severity. GM-CSF inhibition may be a tractable clinical intervention to limit donor alloantigen presentation and GVHD in the lower gastrointestinal tract.
Identifiants
pubmed: 31585949
pii: bloodadvances.2019000053
doi: 10.1182/bloodadvances.2019000053
pmc: PMC6784518
doi:
Substances chimiques
Isoantigens
0
Granulocyte-Macrophage Colony-Stimulating Factor
83869-56-1
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2859-2865Informations de copyright
© 2019 by The American Society of Hematology.
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