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Zhong W, Feng L, Tian W, Qu H, Xu H, Ning K, Liu L, Liu W, Gong X, Chen H. SMURF1 inhibits the Th17 and Th17.1 polarization and improves the Treg/Th17 imbalance in systemic lupus erythematosus through the ubiquitination of RORγt. Mol Immunol 2023; 157:186-194. [PMID: 37054520 DOI: 10.1016/j.molimm.2023.03.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 03/03/2023] [Accepted: 03/26/2023] [Indexed: 04/15/2023]
Abstract
Systemic lupus erythematosus (SLE) is a systemic autoimmune disease. This study aimed to investigate the role of SMAD specific E3 ubiquitin protein ligase 1 (SMURF1) in the Th17 and Th17.1 differentiation and Treg/Th17 imbalance, which are major factors contributing to the pathogenesis of SLE. SLE patients and healthy individuals were recruited to detect the SMURF1 levels in naïve CD4+ cells from peripheral blood. Purified and expanded naïve CD4+ T cells were employed to evaluate the effects of SMURF1 on Th17 and Th17.1 polarization in vitro. MRL/lpr lupus model was employed to explore the disease phenotype as well as Treg/Th17 balance in vivo. The results showed that SMURF1 was down-regulated in naïve CD4+ T cells in peripheral blood of patients with SLE and in spleen of MRL/lpr mice. SMURF1 overexpression suppressed the polarization of naïve CD4+ T cells toward Th17 and Th17.1 phenotype and down-regulated the expression of retinoid-related orphan receptor-gammat (RORγt). Subsequently, SMURF1 down-regulation aggravated the disease phenotype, inflammation, and the Treg/Th17 imbalance in MRL/lpr mice. Furthermore, we found that SMURF overexpression promoted the ubiquitination and decreases the stability of RORγt. In conclusion, SMURF1 inhibited the polarization of Th17 and Th17.1 cells and improved the Treg/Th17 imbalance in SLE, which was mediated as least partly by the ubiquitination of RORγt.
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Affiliation(s)
- Wei Zhong
- Department of Rheumatology and Immunology, The First Hospital of Qiqihar, Qiqihar City, Heilongjiang Province, PR China; Affiliated Qiqihar Hospital, Southern Medical University, Qiqihar City, Heilongjiang Province, PR China
| | - Leheng Feng
- Department of Rheumatology and Immunology, The First Hospital of Qiqihar, Qiqihar City, Heilongjiang Province, PR China; Affiliated Qiqihar Hospital, Southern Medical University, Qiqihar City, Heilongjiang Province, PR China
| | - Wei Tian
- Department of Rheumatology and Immunology, The First Hospital of Qiqihar, Qiqihar City, Heilongjiang Province, PR China; Affiliated Qiqihar Hospital, Southern Medical University, Qiqihar City, Heilongjiang Province, PR China
| | - Hongbo Qu
- Department of Rheumatology and Immunology, The First Hospital of Qiqihar, Qiqihar City, Heilongjiang Province, PR China; Affiliated Qiqihar Hospital, Southern Medical University, Qiqihar City, Heilongjiang Province, PR China
| | - Haibo Xu
- Affiliated Qiqihar Hospital, Southern Medical University, Qiqihar City, Heilongjiang Province, PR China; Department of Endocrinology, The First Hospital of Qiqihar, Qiqihar City, Heilongjiang Province, PR China
| | - Ke Ning
- Department of International Medical Service, Affiliated Zhongshan Hospital of Dalian University, Dalian City, Liaoning Province, PR China
| | - Li Liu
- Affiliated Qiqihar Hospital, Southern Medical University, Qiqihar City, Heilongjiang Province, PR China; Department of Imaging, The First Hospital of Qiqihar, Qiqihar City, Heilongjiang Province, PR China
| | - Wei Liu
- Department of Rheumatology and Immunology, Qinhuangdao Jungong Hospital, Qinhuangdao City, Hebei Province, PR China
| | - Xiaowei Gong
- Department of Rheumatology and Immunology, The First Hospital of Qiqihar, Qiqihar City, Heilongjiang Province, PR China; Affiliated Qiqihar Hospital, Southern Medical University, Qiqihar City, Heilongjiang Province, PR China
| | - Hong Chen
- Affiliated Qiqihar Hospital, Southern Medical University, Qiqihar City, Heilongjiang Province, PR China; TCM Geriatric Department, The First Hospital of Qiqihar, Qiqihar City, Heilongjiang Province, PR China; Heilongjiang Academy of Traditional Chinese Medicine, Harbin City, Heilongjiang Province, PR China.
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Tambuzzi S, Gentile G, Boracchi M, Di Candia D, Bianchi R, Zoja R. Postmortem diagnostics of assumed suicidal food anaphylaxis in prison: a unique case of anaphylactic death due to peach ingestion. Forensic Sci Med Pathol 2021; 17:449-455. [PMID: 33939114 PMCID: PMC8413180 DOI: 10.1007/s12024-021-00373-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2021] [Indexed: 02/02/2023]
Abstract
Suicidal ingestion of food which the victim is aware they are allergic to is an exceptional occurrence in the forensic field. To the best of our knowledge, no cases of suicidal food anaphylaxis have been reported to date. Therefore we present the first case described in the literature. A 30-year-old prisoner was found dead inside his cell with the remains of a peach remains next to his body, and a handwritten farewell note in his pocket. The autopsy revealed only non-specific findings, while laboratory investigations (serological, toxicological, histological, and immunohistochemical) played a pivotal role in determing the cause and manner of death. In particular, a high titer of both total and specific IgE antibodies was detected, as well as an increase of the tryptase level in cadaveric blood. Moreover, a massive concentration of salicylates was measured in the gastric contents. Microscopically, cellular residues characterized by a vegetal structure were observed in the gastric contents and elements suggestive of mast cells were detected in the glottis, lungs, and myocardium. The immunohistochemical investigation with anti-CD117 and anti-tryptase antibodies showed positivity for mast cells, some of which appeared degranulated. Such findings were entirely consistent with an acute systemic anaphylactic reaction triggered by allergy. Therefore, the prisoner’s death was attributed to self-induced food anaphylaxis caused by the ingestion of peaches. This conclusion was achieved based only on circumstantial data, anamnestic information, autopsy findings, and multiple laboratory results. This integrated approach should be used to pursue a post-mortem diagnosis of anaphylaxis.
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Affiliation(s)
- Stefano Tambuzzi
- Dipartimento di Scienze Biomediche per la Salute, Sezione di Medicina Legale e delle Assicurazioni, Università degli Studi di Milano, Via Luigi Mangiagalli, 37 - 20133, Milano, Italy
| | - Guendalina Gentile
- Dipartimento di Scienze Biomediche per la Salute, Sezione di Medicina Legale e delle Assicurazioni, Università degli Studi di Milano, Via Luigi Mangiagalli, 37 - 20133, Milano, Italy
| | - Michele Boracchi
- Dipartimento di Scienze Biomediche per la Salute, Sezione di Medicina Legale e delle Assicurazioni, Università degli Studi di Milano, Via Luigi Mangiagalli, 37 - 20133, Milano, Italy
| | - Domenico Di Candia
- Dipartimento di Scienze Biomediche per la Salute, Sezione di Medicina Legale e delle Assicurazioni, Università degli Studi di Milano, Via Luigi Mangiagalli, 37 - 20133, Milano, Italy
| | - Rachele Bianchi
- Dipartimento di Scienze Biomediche per la Salute, Sezione di Medicina Legale e delle Assicurazioni, Università degli Studi di Milano, Via Luigi Mangiagalli, 37 - 20133, Milano, Italy
| | - Riccardo Zoja
- Dipartimento di Scienze Biomediche per la Salute, Sezione di Medicina Legale e delle Assicurazioni, Università degli Studi di Milano, Via Luigi Mangiagalli, 37 - 20133, Milano, Italy.
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Zhang Q, Xiang L, Zaman MH, Dong W, He G, Deng GM. Predominant Role of Immunoglobulin G in the Pathogenesis of Splenomegaly in Murine Lupus. Front Immunol 2020; 10:3020. [PMID: 32082297 PMCID: PMC7005523 DOI: 10.3389/fimmu.2019.03020] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 12/10/2019] [Indexed: 12/27/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is characterized by high levels of autoantibodies and multiorgan tissue damage. The pathogenesis of splenomegaly in SLE remains unknown. In this study, the role of immunoglobulin G (IgG) generation and deposition in the inflammation of the spleen and associated dysfunction in SLE was investigated. In the lupus mice, we observed the development of spontaneous splenomegaly, and we found that lupus serum IgG is an important pathological factor involved in the initiation of inflammation and further germinal center (GC) and plasma cell formation. We discovered that macrophages of the splenic marginal zone are dispensable for the GC response induced by lupus IgG, but red pulp macrophages are important for GC responses. Furthermore, we found that pathogenic lupus IgG promotes inflammation and GC formation through the macrophage-mediated secretion of TNF-α. Syk inhibitor treatment suppressed the changes in the histopathology of the spleen induced by lupus IgG. This study will contribute to the understanding of the pathogenesis of splenomegaly in lupus and promote the development of an effective therapeutic strategy for SLE.
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Affiliation(s)
- Qian Zhang
- Key Laboratory of Antibody Techniques, National Health Commission, Nanjing Medical University, Nanjing, China
| | - Liping Xiang
- Key Laboratory of Antibody Techniques, National Health Commission, Nanjing Medical University, Nanjing, China.,Department of Clinical Laboratory, Nanjing Jiangning Hospital, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Muhammad Haidar Zaman
- Key Laboratory of Antibody Techniques, National Health Commission, Nanjing Medical University, Nanjing, China
| | - Wenhui Dong
- Key Laboratory of Antibody Techniques, National Health Commission, Nanjing Medical University, Nanjing, China
| | - Guodan He
- Key Laboratory of Antibody Techniques, National Health Commission, Nanjing Medical University, Nanjing, China
| | - Guo-Min Deng
- Department of Rheumatology, Union Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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