IL-39 promotes chronic graft-versus-host disease by increasing T and B Cell pathogenicity

Experimental Hematology & Oncology - Tập 11 - Trang 1-15 - 2022
Kangkang Lv1,2, Bo Hu2, Mingzhu Xu1,2, Li Wan3, Ziqi Jin2, Mimi Xu1,2, Yuanyuan Du1,2, Kunpeng Ma2, Quansheng Lv1, Yang Xu1,2, Lei Lei2, Huanle Gong2, Haiyan Liu4, Depei Wu1,2, Yuejun Liu1,2
1National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China
2Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
3Department of Emergency Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
4Department of Microbiology and Immunology, Life Sciences Institute, Immunology Translational Research ProgramYong Loo Lin School of MedicineImmunology ProgramNational University of Singapore, Singapore, Singapore

Tóm tắt

Chronic graft-versus-host disease (cGVHD) remains a major complication during the late phase of allogeneic hematopoietic stem cell transplantation (allo-HSCT). IL-39, a newly described pro-inflammatory cytokine belonging to the IL-12 family, plays a role in lupus development. Recently, IL-39 has been identified as a pathogenic factor in acute GVHD (aGVHD). However, the role of IL-39 in the pathogenesis of cGVHD remains unclear. We constructed a recombinant IL-39 plasmid and established scleroderma and lupus-like cGVHD models. Quantitative PCR and enzyme-linked immunosorbent assay (ELISA) were used to detect IL-39 expression in mice and patients post transplantation, respectively. Hydrodynamic gene transfer (HGT) was performed to achieve IL-39 overexpression in vivo. Multiparameter flow cytometry, western blotting, and assays in vitro were performed to investigate the effect of IL-39 on cGVHD. The relative expression of IL-23p19 and EBi3 was significantly increased in the intestine of cGVHD mice on day 40 post allo-HSCT, and IL-39 levels were significantly elevated in the serum of patients following allo-HSCT. Overexpression of IL-39 significantly aggravated the severity of cGVHD. Increased IL-39 levels promoted T-cell activation and germinal center responses, and may exacerbate thymic damage. Consistently, blocking IL-39 markedly ameliorated immune dysregulation in the cGVHD mice. Furthermore, we found that IL-39 was produced by B cells, CD11b+ cells, and CD8+T cells after activation. Stimulation of IL-39 led to upregulation of the IL-39 receptor on CD4+T cells and further caused activation of the STAT1/STAT3 pathway, through which IL-39 may exert its pro-inflammatory effects. Our study reveals a critical role for IL-39 in cGVHD pathogenesis and indicates that IL-39 may serve as a potential therapeutic target for cGVHD prevention.

Tài liệu tham khảo

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