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Dendritic cell-derived IL-27 p28 regulates T cell program in pathogenicity and alleviates acute graft-versus-host disease. Signal Transduct Target Ther 2022; 7:319. [PMID: 36109504 PMCID: PMC9477797 DOI: 10.1038/s41392-022-01147-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 06/30/2022] [Accepted: 07/29/2022] [Indexed: 11/18/2022] Open
Abstract
Interleukin 27 (IL-27), a heterodimeric cytokine composed of Epstein-Barr virus-induced 3 and p28, is a pleiotropic cytokine with both pro-and anti-inflammatory properties. However, the precise role of IL-27 in acute graft-versus-host disease is not yet fully understood. In this study, utilizing mice with IL-27 p28 deficiency in dendritic cells (DCs), we demonstrated that IL-27 p28 deficiency resulted in impaired Treg cell function and enhanced effector T cell responses, corresponding to aggravated aGVHD in mice. In addition, using single-cell RNA sequencing, we found that loss of IL-27 p28 impaired Treg cell generation and promoted IL-1R2+TIGIT+ pathogenic CD4+ T cells in the thymus at a steady state. Mechanistically, IL-27 p28 deficiency promoted STAT1 phosphorylation and Th1 cell responses, leading to the inhibition of Treg cell differentiation and function. Finally, patients with high levels of IL-27 p28 in serum showed a substantially decreased occurrence of grade II-IV aGVHD and more favorable overall survival than those with low levels of IL-27 p28. Thus, our results suggest a protective role of DC-derived IL-27 p28 in the pathogenesis of aGVHD through modulation of the Treg/Teff cell balance during thymic development. IL-27 p28 may be a valuable marker for predicting aGVHD development after transplantation in humans.
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STAT3 Role in T-Cell Memory Formation. Int J Mol Sci 2022; 23:ijms23052878. [PMID: 35270020 PMCID: PMC8910982 DOI: 10.3390/ijms23052878] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 02/28/2022] [Accepted: 03/03/2022] [Indexed: 12/12/2022] Open
Abstract
Along with the clinical success of immuno-oncology drugs and cellular therapies, T-cell biology has attracted considerable attention in the immunology community. Long-term immunity, traditionally analyzed in the context of infection, is increasingly studied in cancer. Many signaling pathways, transcription factors, and metabolic regulators have been shown to participate in the formation of memory T cells. There is increasing evidence that the signal transducer and activator of transcription-3 (STAT3) signaling pathway is crucial for the formation of long-term T-cell immunity capable of efficient recall responses. In this review, we summarize what is currently known about STAT3 role in the context of memory T-cell formation and antitumor immunity.
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Zou X, Zhang Y, Wang S, Wang X, Yang W, Li Y. Attenuate ICOSL and IL-27 in Aire-overexpressing DC2.4 cells suppress TFH cell differentiation. Immunobiology 2021; 226:152147. [PMID: 34710738 DOI: 10.1016/j.imbio.2021.152147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 09/28/2021] [Accepted: 10/13/2021] [Indexed: 10/20/2022]
Abstract
Autoimmune regulator (Aire) is a transcription factor that plays a pivotal role in the maintenance of immune tolerance. However, little is known about its roles in peripheral immune tolerance. Aire is predominantly expressed in dendritic cells (DCs) in the periphery. DCs with higher inducible costimulatory ligand (ICOSL) expression and interleukin (IL)-27 production have been reported highly suggesting its roles in inducing follicular helper T cells (TFH). Here we use Aire-overexpressing DC2.4 cells in a coculture system composed of naïve CD4+ T cells to test whether Aire in DCs affects TFH cell differentiation. We found that the frequency of TFH cells and its specific cytokine IL-21 were decreased in CD4+ T lymphocytes after cocultured with Aire overexpressed DC2.4 cells. In activated DCs, ICOSL expression and IL-27 production were significantly suppressed by Aire. Furthermore, addition of recombinant ICOSL or IL-27 in the coculture system enhanced TFH cell differentiation and IL-21 expression. These results revealed that Aire plays an indispensable role in the repression of dendritic cells on the differentiation and function of TFH cells by inhibiting ICOSL and IL-27 expression.
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Affiliation(s)
- Xueyang Zou
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China.
| | - Yi Zhang
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China.
| | - Shuang Wang
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China
| | - Xiaoya Wang
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China
| | - Wei Yang
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China.
| | - Yi Li
- Department of Immunology, College of Basic Medical Sciences, Jilin University, Changchun 130021, China.
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Qi Z, Wang F, Yu G, Wang D, Yao Y, You M, Liu J, Liu J, Sun Z, Ji C, Xue Y, Yu S. SRSF1 serves as a critical posttranscriptional regulator at the late stage of thymocyte development. SCIENCE ADVANCES 2021; 7:7/16/eabf0753. [PMID: 33863728 PMCID: PMC8051871 DOI: 10.1126/sciadv.abf0753] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 02/25/2021] [Indexed: 05/05/2023]
Abstract
The underlying mechanisms of thymocyte maturation remain largely unknown. Here, we report that serine/arginine-rich splicing factor 1 (SRSF1) intrinsically regulates the late stage of thymocyte development. Conditional deletion of SRSF1 resulted in severe defects in maintenance of late thymocyte survival and a blockade of the transition of TCRβhiCD24+CD69+ immature to TCRβhiCD24-CD69- mature thymocytes, corresponding to a notable reduction of recent thymic emigrants and diminished periphery T cell pool. Mechanistically, SRSF1 regulates the gene networks involved in thymocyte differentiation, proliferation, apoptosis, and type I interferon signaling pathway to safeguard T cell intrathymic maturation. In particular, SRSF1 directly binds and regulates Irf7 and Il27ra expression via alternative splicing in response to type I interferon signaling. Moreover, forced expression of interferon regulatory factor 7 rectifies the defects in SRSF1-deficient thymocyte maturation via restoring expression of type I interferon-related genes. Thus, our work provides new insight on SRSF1-mediated posttranscriptional regulatory mechanism of thymocyte development.
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Affiliation(s)
- Zhihong Qi
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Fang Wang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Guotao Yu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Di Wang
- Key Laboratory of RNA Biology, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Yingpeng Yao
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Menghao You
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Jingjing Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Juanjuan Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Zhen Sun
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Ce Ji
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yuanchao Xue
- Key Laboratory of RNA Biology, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Shuyang Yu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China.
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