期刊
MUCOSAL IMMUNOLOGY
卷 9, 期 2, 页码 309-321出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/mi.2015.61
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资金
- Agence de Biomedecine
- Agence Nationale de la Recherche (Labex LipSTIC) [ANR-11-LABX-0021]
- Etablissement Francais du Sang [2011-11, 2014-10]
- Association for Training, Education and Research in Hematology, Immunology and Transplantation'' (ATERHIT)
- Agence Nationale de la Recherche (IHU-Cesti) [ANR-10-IBHU-005]
Acute graft-versus-host disease (aGVHD) remains a major complication following allogeneic hematopoietic cell transplantation, limiting the success of this therapy. We previously reported that interleukin-22 (IL-22) participates to aGVHD development, but the underlying mechanisms of its contribution remain poorly understood. In this study, we analyzed the mechanism of the pathological function of IL-22 in intestinal aGVHD. Ex-vivo colon culture experiments indicated that IL-22 was able to induce Th1-like inflammation via signal transducer and activator of transcription factor-1 (STAT1) and CXCL10 induction in the presence of type I interferon (IFN). To evaluate a potential synergy between IL-22 and type I IFN in aGVHD, we transplanted recipient mice, either wild-type (WT) or type I IFN receptor deficient (IFNAR(-/-)), with bone marrow cells and WT or IL-22 deficient (IL-22(-/-)) T cells. We observed a decreased GVHD severity in IFNAR(-/-) recipient of IL-22(-/-) T cells, which was associated with a lower level of STAT1 activation and reduced CXCL10 expression in the large intestine. Finally, immunohistochemistry staining of STAT1 performed on gastrointestinal biopsies of 20 transplanted patients showed exacerbated STAT1 activation in gastrointestinal tissues of patients with aGVHD as compared with those without aGVHD. Thus, interfering with both IL-22 and type I IFN signaling may provide a novel approach to limit aGVHD.
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