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Gao P, Song S, Wang Y, Liu H, Wang X, Shu Q, Yang P, Zheng P. Semaphorin 3 a restores the ability of type 1 regulatory T cells to suppress food allergy. Immunol Res 2024; 72:320-330. [PMID: 37999823 DOI: 10.1007/s12026-023-09437-6] [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: 04/17/2023] [Accepted: 11/09/2023] [Indexed: 11/25/2023]
Abstract
Food allergy (FA) is a common immune disorder that involves dysfunctional immune regulation. More remedies for restoring immune regulation are necessary. Semaphorin 3 A (Sema3a) is a secreted protein of the semaphorin family, which plays a role in immune responses at all stages. The objective of this study is to gain an understanding of how Sema3a can restore the immune regulatory abilities of type 1 regulatory T cells (Tr1 cells). In this study, blood samples were taken from patients with FA. Tr1 cells were purified from blood samples using flow cytometry cell sorting, using LAG3 and CD49b as surface markers. RNA sequencing was employed to examine the characteristics of Tr1 cells. We observed an exaggerated increase in ER stress in peripheral Tr1 cells of FA patients. Enforced expression of spliced X-box protein-1 (XBP1s, one of the key molecules in ER stress) resulted in suppression of interleukin (IL)-10 expression in CD4+ T cells. Eukaryotic initiation factor 2a (eIF2a) mediated the effects of XBP1 on suppressing IL-10 expression in Tr1 cells. The use of Sema3a resulted in a decrease in ER stress, and an increase in IL-10 expression in Tr1 cells of FA patients. Sema3a administration reduced experimental FA by increasing the number of Tr1 cells. In conclusion, IL-10 expression in Tr1 cells is disturbed by ER stress. Sema3a treatment restores the expression of IL-10 and the immunosuppressive capability of Tr1 cells.
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Affiliation(s)
- Panpan Gao
- Department of Clinical Nutrition, Fifth Affiliated Hospital, Zhengzhou University, Zhengzhou, China
- Department of Gastroenterology, Fifth Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - Shuo Song
- Marshall Laboratory of Biomedical Engineering, Shenzhen University, Shenzhen, China
- Department of General Medicine Practice, Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Institute of Allergy & Immunology, State Key Laboratory of Respiratory Disease Shenzhen University Division, Shenzhen University School of Medicine, Shenzhen, China
| | - Yanan Wang
- Department of Gastroenterology, Fifth Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - Huazhen Liu
- Marshall Laboratory of Biomedical Engineering, Shenzhen University, Shenzhen, China
- Department of General Medicine Practice, Third Affiliated Hospital of Shenzhen University, Shenzhen, China
- Institute of Allergy & Immunology, State Key Laboratory of Respiratory Disease Shenzhen University Division, Shenzhen University School of Medicine, Shenzhen, China
| | - Xiangyu Wang
- Marshall Laboratory of Biomedical Engineering, Shenzhen University, Shenzhen, China
- Department of Gastroenterology, Shenzhen Second People's Hospital, Shenzhen, China
| | - Qing Shu
- Marshall Laboratory of Biomedical Engineering, Shenzhen University, Shenzhen, China
- Department of Gastroenterology, Shenzhen Second People's Hospital, Shenzhen, China
| | - Pingchang Yang
- Marshall Laboratory of Biomedical Engineering, Shenzhen University, Shenzhen, China.
- Institute of Allergy & Immunology, State Key Laboratory of Respiratory Disease Shenzhen University Division, Shenzhen University School of Medicine, Shenzhen, China.
| | - Pengyuan Zheng
- Department of Gastroenterology, Fifth Affiliated Hospital, Zhengzhou University, Zhengzhou, China.
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Fan J, Ma L, Xie B, Qiu S, Song S, Tang Z, Wu Y, Huangfu H, Feng Y, Luo X, Yang P. Modulating endoplasmic reticulum stress attenuates mast cell degranulation. Int Immunopharmacol 2024; 126:111336. [PMID: 38056196 DOI: 10.1016/j.intimp.2023.111336] [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: 09/03/2023] [Revised: 11/16/2023] [Accepted: 11/29/2023] [Indexed: 12/08/2023]
Abstract
OBJECTIVES Degranulation of mast cells leads to direct allergic symptoms. The underlying mechanism needs to be explored further. Endoplasmic reticulum (ER) stress is involved in the pathogenesis of allergic conditions. The objective of this study is to gain a better understanding of the mechanism of mast cell degranulation. METHODS Bone marrow derived mast cells and mast cells isolated from the airway tissues were prepared. The role of ER stress in mediating the release of mast cells was tested. RNA sequencing (RNAseq) was used to investigate the genetic activities of mast cells. RESULTS Our observation showed that sensitization increased ER stress in mast cells. X-box-1 binding protein (XBP1) activity was linked to mast cell degranulation. Modulation of ER stress or XBP1 expression regulates the release of the mast cell mediator. XBP1 promoted the mediator release of mast cells by activating spleen tyrosine kinase (Syk). Activation of eukaryotic initiation factor 2a (eIF2a) inhibited XBP1 in mast cells. Semaphorin 3A was effective in preventing experimental allergic rhinitis (AR) due to its ability to suppress the release of mast cell mediators. CONCLUSIONS ER stress is associated with the mast cell degranulation. By inhibiting XBP1, the crucial molecule of ER stress, mast cell degranulation can be suppressed and experimental AR can be mitigated.
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Affiliation(s)
- Jialiang Fan
- Department of Pediatric Otolaryngology, Shenzhen Hospital, and Third School of Clinical Medicine, Southern Medical University, Shenzhen, China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen, China; Institute of Allergy & Immunology, Shenzhen University School of Medicine, State Key Laboratory of Respiratory Disease Shenzhen University Division, Shenzhen, China
| | - Longpeng Ma
- Department of Pediatric Otolaryngology, Shenzhen Hospital, and Third School of Clinical Medicine, Southern Medical University, Shenzhen, China; Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen, China; Institute of Allergy & Immunology, Shenzhen University School of Medicine, State Key Laboratory of Respiratory Disease Shenzhen University Division, Shenzhen, China
| | - Bailing Xie
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen, China; Institute of Allergy & Immunology, Shenzhen University School of Medicine, State Key Laboratory of Respiratory Disease Shenzhen University Division, Shenzhen, China; Department of Otolaryngology, Head & Neck Surgery, First Hospital, Shanxi Medical University, Taiyuan, China
| | - Shuyao Qiu
- Department of Pediatric Otolaryngology, Shenzhen Hospital, and Third School of Clinical Medicine, Southern Medical University, Shenzhen, China
| | - Shuo Song
- Department of General Practice Medicine. Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Zhiyuan Tang
- Longgang ENT Hospital and Shenzhen ENT Institute, Shenzhen, China
| | - Yongjin Wu
- Longgang ENT Hospital and Shenzhen ENT Institute, Shenzhen, China
| | - Hui Huangfu
- Department of Otolaryngology, Head & Neck Surgery, First Hospital, Shanxi Medical University, Taiyuan, China
| | - Yan Feng
- Department of Otolaryngology, Head & Neck Surgery, First Hospital, Shanxi Medical University, Taiyuan, China
| | - Xiangqian Luo
- Department of Pediatric Otolaryngology, Shenzhen Hospital, and Third School of Clinical Medicine, Southern Medical University, Shenzhen, China.
| | - Pingchang Yang
- Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Shenzhen, China; Institute of Allergy & Immunology, Shenzhen University School of Medicine, State Key Laboratory of Respiratory Disease Shenzhen University Division, Shenzhen, China.
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