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Elbrashy MM, Metwally H, Sakakibara S, Kishimoto T. Threonine Phosphorylation and the Yin and Yang of STAT1: Phosphorylation-Dependent Spectrum of STAT1 Functionality in Inflammatory Contexts. Cells 2024; 13:1531. [PMID: 39329714 PMCID: PMC11429647 DOI: 10.3390/cells13181531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2024] [Revised: 09/06/2024] [Accepted: 09/06/2024] [Indexed: 09/28/2024] Open
Abstract
Threonine phosphorylation promotes inflammatory functions of STAT1 while restricting its interferon (IFN) signaling in innate immune responses. However, it remains unclear whether the restriction of STAT1-mediated IFN signaling conferred by threonine phosphorylation is a ubiquitous mechanism or one that is context-dependent. To address this, we utilized pristane-induced lupus, a prototype IFN-driven systemic autoimmune disease model characterized by the production of high-titer autoantibodies against nucleic acid-associated antigens. Through genetic and biochemical assays, we demonstrate that Thr748 phosphorylation is dispensable for STAT1 functionality in pristane-induced lupus. Genetically engineered mice expressing the phospho-deficient threonine 748-to-alanine (T748A) mutant STAT1 exhibited similar survival rates, high titers of anti-dsDNA IgG, and nephritis compared to their wild-type littermates. In sharp contrast, STAT1 deficiency protected mice against pristane-induced lupus, as evidenced by increased survival, low titers of anti-dsDNA IgG, and less severe nephritis in the STAT1 knockout mice compared to their T748A littermates. Our study suggests a phosphorylation-dependent modularity that governs the spectrum of STAT1 functionality in inflammatory contexts: IFN phospho-tyrosine-dependent and inflammatory phospho-threonine-dependent, with Thr748 phosphorylation driving selective inflammatory activities, particularly those not driven by the canonical JAK pathway. From a broader perspective, our findings provide deeper insights into how distinct phosphorylation events shape the combinatorial logic of signaling cassettes, thereby regulating context-dependent responses.
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Affiliation(s)
- Maha M Elbrashy
- Laboratory of Immune Regulation, Immunology Frontier Research Center, The World Premier International Research Center Initiative (WPI), Osaka University, Osaka 565-0871, Japan
- Biochemistry Department, Biotechnology Research Institute, National Research Center, Giza P.O. Box 12622, Egypt
| | - Hozaifa Metwally
- Laboratory of Immune Regulation, Immunology Frontier Research Center, The World Premier International Research Center Initiative (WPI), Osaka University, Osaka 565-0871, Japan
| | - Shuhei Sakakibara
- Laboratory of Immune Regulation, Immunology Frontier Research Center, The World Premier International Research Center Initiative (WPI), Osaka University, Osaka 565-0871, Japan
- Graduate School of Medical Safety Management, Jikei University of Health Care Sciences, Osaka 532-0003, Japan
| | - Tadamitsu Kishimoto
- Laboratory of Immune Regulation, Immunology Frontier Research Center, The World Premier International Research Center Initiative (WPI), Osaka University, Osaka 565-0871, Japan
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Zhu C, Yang Z, Zhang Y, Li Z, Li G, Yang B, Kang N, Wang J, Sun Y, Ding N, Rao Y, Liu W. PROTAC for Bruton's tyrosine kinase degradation alleviates inflammation in autoimmune diseases. Cell Discov 2024; 10:82. [PMID: 39107285 PMCID: PMC11303405 DOI: 10.1038/s41421-024-00711-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 07/13/2024] [Indexed: 08/09/2024] Open
Affiliation(s)
- Can Zhu
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua-Peking Center for Life Sciences, Institute for Immunology, Ministry of Education Key Laboratory of Protein Sciences, Beijing Key Lab for Immunological Research on Chronic Diseases, Beijing Tsinghua Changgeng Hospital, Tsinghua University, Beijing, China
- The First Affiliated Hospital of Anhui Medical University and Institute of Clinical Immunology, Anhui Medical University, Hefei, Anhui, China
| | - Zimo Yang
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing, China
| | - Yuxiao Zhang
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua-Peking Center for Life Sciences, Institute for Immunology, Ministry of Education Key Laboratory of Protein Sciences, Beijing Key Lab for Immunological Research on Chronic Diseases, Beijing Tsinghua Changgeng Hospital, Tsinghua University, Beijing, China
| | - Zhenjun Li
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China
| | - Guangchen Li
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing, China
| | - Bing Yang
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua-Peking Center for Life Sciences, Institute for Immunology, Ministry of Education Key Laboratory of Protein Sciences, Beijing Key Lab for Immunological Research on Chronic Diseases, Beijing Tsinghua Changgeng Hospital, Tsinghua University, Beijing, China
| | - Na Kang
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua-Peking Center for Life Sciences, Institute for Immunology, Ministry of Education Key Laboratory of Protein Sciences, Beijing Key Lab for Immunological Research on Chronic Diseases, Beijing Tsinghua Changgeng Hospital, Tsinghua University, Beijing, China
| | - Jingwen Wang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China
| | - Yonghui Sun
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing, China
| | - Ning Ding
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Department of Lymphoma, Peking University Cancer Hospital & Institute, Beijing, China.
| | - Yu Rao
- MOE Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing, China.
| | - Wanli Liu
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua-Peking Center for Life Sciences, Institute for Immunology, Ministry of Education Key Laboratory of Protein Sciences, Beijing Key Lab for Immunological Research on Chronic Diseases, Beijing Tsinghua Changgeng Hospital, Tsinghua University, Beijing, China.
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Chavula T, To S, Smith J, Pedroza M, Nimri J, Devaraj S, Wenderfer S, Vogel TP, Agarwal SK. CADHERIN-11 regulation of myeloid phagocytes and autoimmune inflammation in murine lupus. J Autoimmun 2024; 145:103197. [PMID: 38447248 DOI: 10.1016/j.jaut.2024.103197] [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: 11/05/2023] [Revised: 02/15/2024] [Accepted: 02/23/2024] [Indexed: 03/08/2024]
Abstract
BACKGROUND AND OBJECTIVE Understanding the regulation of efferocytosis by myeloid phagocytes is important in identifying novel targets in systemic lupus erythematosus (SLE). Cadherin-11 (CDH11), a cell adhesion molecule, is implicated in inflammatory arthritis and fibrosis and recently been shown to regulate macrophage phagocytosis. The extent and mechanism of this regulation is unknown. Our objective was to examine the extent to which CDH11 regulates myeloid phagocytes and contributes to autoimmunity and tissue inflammation. METHODS We analyzed efferocytosis in macrophages and dendritic cells (DCs) from WT and Cdh11-/- mice and investigated the mechanisms in vitro. We investigated the role of CDH11 in disease development in vivo using the pristane induced lupus model. To translate the clinical relevance of CDH11 in human disease, we measured serum CDH11 levels in two independent pediatric SLE (pSLE) cohorts and healthy controls. RESULTS Using bone marrow derived macrophages (BMDMs) and DCs (BMDCs), we found impaired efferocytosis in phagocytes from Cdh11-/- mice, mediated by downregulated efferocytosis receptor expression and RhoGTPase activation. Specifically, loss of CDH11 downregulated Mertk expression and Rac1 activation in BMDMs, and integrin αVβ3 expression and Cdc42 activation in BMDCs, highlighting distinct pathways. In vivo, Cdh11-/- mice displayed defective efferocytosis and increased accumulation of apoptotic debris in pristane-induced lupus. Further, Cdh11-/- mice had enhanced systemic inflammation and autoimmune inflammation with increased anti-dsDNA autoantibodies, splenomegaly, type I interferons, and inflammatory cytokines. Paradoxically, at the tissue level, Cdh11-/- mice were protected against glomerulonephritis, indicating a dual role in murine lupus. Finally, SLE patients had increased serum CDH11 compared to controls. CONCLUSION This study highlights a novel role of CDH11 in regulating myeloid cells and efferocytosis and its potential as a contributor to development in autoimmunity murine lupus. Despite the increase in autoimmunity, Cdh11-/- mice developed decreased tissue inflammation and damage.
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Affiliation(s)
- Thandiwe Chavula
- Section of Immunology, Allergy and Rheumatology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Sarah To
- Section of Immunology, Allergy and Rheumatology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Jennifer Smith
- Section of Immunology, Allergy and Rheumatology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Mesias Pedroza
- Section of Immunology, Allergy and Rheumatology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Jena Nimri
- Section of Immunology, Allergy and Rheumatology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Sridevi Devaraj
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, USA; Pathology Department, Texas Children's Hospital, Houston, TX, USA
| | - Scott Wenderfer
- Department of Pediatric Nephrology, B.C. Children's Hospital, Vancouver, BC, Canada
| | - Tiphanie P Vogel
- Section of Immunology, Allergy and Rheumatology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA; Department of Pediatrics-Rheumatology, Baylor College of Medicine, Houston, TX, USA; Division of Rheumatology, Texas Children's Hospital, Houston, TX, USA
| | - Sandeep K Agarwal
- Section of Immunology, Allergy and Rheumatology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA.
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Miyagawa F, Ozato K, Tagaya Y, Asada H. Type I IFN Derived from Ly6C hi Monocytes Suppresses Type 2 Inflammation in a Murine Model of Atopic Dermatitis. J Invest Dermatol 2024; 144:520-530.e2. [PMID: 37739337 DOI: 10.1016/j.jid.2023.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 08/26/2023] [Accepted: 08/31/2023] [Indexed: 09/24/2023]
Abstract
The roles of innate immune cells, including eosinophils, basophils, and group 2 innate lymphoid cells, in atopic dermatitis (AD) have been well-documented, whereas that of monocytes, another component of the innate immunity, remains rather poorly understood, thus necessitating the topic of this study. In addition, cytokines and cellular pathways needed for the resolution of type 2 inflammation in AD need further investigation. Using a murine AD model, we report here that (i) Ly6Chi monocytes were rapidly recruited to the AD lesion in a CCR2-dependent manner, blockade of which exacerbated AD; (ii) type I IFN production is profoundly involved in this suppression because the blockade of it by genetic depletion or antibody neutralization exacerbated AD; and (iii) Ly6Chi monocytes operate through the production of type I IFN because Ly6Chi monocytes from Irf7-null mice, which lack type I IFN production, failed to rescue Ccr2-/- mice from severe AD upon adoptive transfer. In addition, in vitro studies demonstrated type I IFN suppressed basophil expansion from bone marrow progenitor cells and survival of mature basophils. Collectively, our work suggests that Ly6Chi monocytes are the first and dominant inflammatory cells reaching AD lesions that negatively regulate type 2 inflammation through the production of type I IFN.
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Affiliation(s)
- Fumi Miyagawa
- Department of Dermatology, Nara Medical University School of Medicine, Nara, Japan.
| | - Keiko Ozato
- Laboratory of Molecular Growth Regulation, Eunice Kennedy Shriver National Institutes of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA
| | - Yutaka Tagaya
- Cell Biology Lab, Division of Virology, Pathogenesis and Cancer, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Hideo Asada
- Department of Dermatology, Nara Medical University School of Medicine, Nara, Japan
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5
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Guan Y, Chen Q, Xu J, Chen B, Ou B, Liu T, Xie S, Bie Y. The anti-inflammatory effects of mesenchymal stem cells attenuate diffuse pulmonary hemorrhage. Biotechnol J 2024; 19:e2200632. [PMID: 37735964 DOI: 10.1002/biot.202200632] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 07/12/2023] [Accepted: 09/07/2023] [Indexed: 09/23/2023]
Abstract
There are few effective treatment options for diffuse pulmonary hemorrhage (DPH). We aimed to elucidate the therapeutic role and underlying mechanisms of mesenchymal stem cells (MSCs) and MSC-derived extracellular vesicles (MSC-EVs) in DPH. Therapeutic effects of MSCs/MSC-EVs in pristane-induced DPH mice were evaluated via pulmonary function testing and histopathology. Transcriptome sequencing analyzed differentially expressed genes in control, DPH, and MSC groups. The proportion of macrophage polarization was evaluated in vivo and in vitro via fluorescence-activated cell sorting in control, DPH, MSC, MSC-EV inhalation, and MSC-EV intravenous groups. Intraperitoneal injection of pristane induced diffuse alveolar hemorrhage, early fibrosis, and inflammation in C57BL/6 mice. Monocytes were depleted in the peripheral blood in DPH mice and MSCs were recruited to the lungs, resulting in significantly attenuated diffuse alveolar hemorrhage and suppressed immunological response. This was more effective in the hyperacute hemorrhage phase than the early inflammatory phase. An MSC treatment-mediated anti-inflammatory effect was observed in DPH mice. Furthermore, MSC-EVs inhalation or tail-vein injection could effectively reduce DPH injury. MSCs could suppress macrophage M1 polarization in DPH in vivo and in vitro. MSCs displayed significant therapeutic effects in pristane-induced DPH, which may be a promising cell-free therapeutic approach.
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Affiliation(s)
- Yajin Guan
- School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, South China Institute of Large Animal Models for Biomedicine, Wuyi University, Jiangmen, Guangdong, China
| | - Qianqing Chen
- Guangdong Provincial Key Laboratory of New Drug Screening, Pharmaceutica, Life Sciences and Biopharmaceutics, Southern Medical University, Guangzhou, Guangdong, China
- Guangdong Mingzhu Biotechnology Co., Ltd, Foshan, Guangdong, China
| | - Jiahuan Xu
- Guangdong Provincial Key Laboratory of New Drug Screening, Pharmaceutica, Life Sciences and Biopharmaceutics, Southern Medical University, Guangzhou, Guangdong, China
- Guangdong Mingzhu Biotechnology Co., Ltd, Foshan, Guangdong, China
| | - Boyu Chen
- Guangdong Provincial Key Laboratory of New Drug Screening, Pharmaceutica, Life Sciences and Biopharmaceutics, Southern Medical University, Guangzhou, Guangdong, China
- Guangdong Mingzhu Biotechnology Co., Ltd, Foshan, Guangdong, China
| | - Baofang Ou
- Guangdong Provincial Key Laboratory of New Drug Screening, Pharmaceutica, Life Sciences and Biopharmaceutics, Southern Medical University, Guangzhou, Guangdong, China
- Guangdong Mingzhu Biotechnology Co., Ltd, Foshan, Guangdong, China
| | - Tianping Liu
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, South China Institute of Large Animal Models for Biomedicine, Wuyi University, Jiangmen, Guangdong, China
| | - Shuilin Xie
- Guangdong Mingzhu Biotechnology Co., Ltd, Foshan, Guangdong, China
| | - Yanan Bie
- School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong, China
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Xu L, Yang R, Cao Y, Wang M, Yang X. Risk factors of diffuse alveolar hemorrhage in Chinese patients with systemic lupus erythematosus. Sci Rep 2023; 13:22381. [PMID: 38104153 PMCID: PMC10725482 DOI: 10.1038/s41598-023-49978-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 12/14/2023] [Indexed: 12/19/2023] Open
Abstract
This study aimed to investigate the frequency and features of diffuse alveolar hemorrhage (DAH) in Chinese patients with systemic lupus erythematosus (SLE) and evaluate the association of DAH with the features. A total of 943 patients with SLE were categorized into two groups: 896 patients without DAH and 47 patients with DAH. The demographic data, clinical and laboratory findings, and SLE disease activity index 2000 of all patients were statistically analyzed. The DAH frequency in patients with SLE was 4.98%, and the mortality rate of DAH was 42.55%. The clinical features with statistical differences between the two groups were analyzed by multivariate logistic regression, and the results suggested that shorter disease duration [odds ratio (OR): 0.972, 95% confidence interval (CI) 0.946, 0.998], younger age (OR: 0.867, 95% CI 0.764, 0.984), moderate (OR: 25.949, 95% CI 3.316, 203.065) or severe (OR: 24.904, 95% CI 2.675, 231.859) anemia, abnormally elevated levels of urine protein (OR: 10.839, 95% CI 1.351, 86.938) and serum creatinine (OR: 14.534, 95% CI 5.012, 42.142), interstitial lung disease (OR: 6.569, 95% CI 2.053, 21.021), and infection (OR: 8.890, 95% CI 3.580, 22.077) were independent risk factors for the occurrence of DAH in patients with SLE. Moderate or severe anemia was highly suggestive of DAH.
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Affiliation(s)
- Lishan Xu
- Department of Rheumatology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Rong Yang
- Follow-Up Center, Fujian Medical University Union Hospital, Fuzhou, China
| | - Yingping Cao
- Department of Laboratory Medicine, Fujian Medical University Union Hospital, Fuzhou, China
| | - Meihua Wang
- Department of Laboratory Medicine, Fujian Medical University Union Hospital, Fuzhou, China.
| | - Xuwei Yang
- Department of Rheumatology, Fujian Medical University Union Hospital, Fuzhou, China.
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He X, Jiang L, Hu L, Du P, Zhu M, Wu H, Zhao M, Lu Q. Mivebresib alleviates systemic lupus erythematosus-associated diffuse alveolar hemorrhage via inhibiting infiltration of monocytes and M1 polarization of macrophages. Int Immunopharmacol 2023; 120:110305. [PMID: 37182455 DOI: 10.1016/j.intimp.2023.110305] [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: 02/13/2023] [Revised: 04/23/2023] [Accepted: 05/05/2023] [Indexed: 05/16/2023]
Abstract
BACKGROUND Diffuse alveolar hemorrhage (DAH) is a serious complication that can arise from systemic lupus erythematosus (SLE) and other autoimmune diseases. While current treatments for DAH have limitations and adverse side effects, recent evidence suggests that inflammatory macrophages play a crucial role in the development of DAH. In this study, we investigated Mivebresib, a BET protein-bromodomain-containing protein 4 (BRD4) inhibitor, as a potential treatment for DAH. RESULTS Our findings show that Mivebresib effectively protected C57BL/6J mice against pristane-induced DAH by inhibiting the migration and polarization of monocytes and macrophages, as well as pathogenic B and T cells. Specifically, Mivebresib modified the distribution of leukocytes, impeded the polarization of inflammatory macrophages, and reduced the frequency of CD19 + CD5 + B cells in the lungs of pristane-treated mice. Furthermore, in vitro experiments demonstrated that Mivebresib inhibited LPS-induced M1 polarization of macrophages and the expression of pro-inflammatory cytokines, M1 marker genes, and chemokines-chemokine receptors while thwarting the secretion of IL-6 and TNF-α. Transcriptomic analysis suggested and experiments comfimed that Mivebresib inhibits M1 polarization via interrupting the p300/BRD4/HIF1A axis. CONCLUSIONS Our study demonstrates that Mivebresib has therapeutic potential for the life-threatening complication of DAH caused by SLE. By inhibiting macrophage polarization and the infiltration of inflammatory cells, Mivebresib may offer a promising treatment option for patients suffering from this disease.
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Affiliation(s)
- Xieling He
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Li Jiang
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Longyuan Hu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Pei Du
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Ming Zhu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Haijing Wu
- Department of Dermatology, Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Ming Zhao
- Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Institute of Dermatology, Chinese Academy of Medical Sciences, Nanjing, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China; Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital, Central South University, Changsha, China.
| | - Qianjin Lu
- Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Institute of Dermatology, Chinese Academy of Medical Sciences, Nanjing, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China; Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital, Central South University, Changsha, China.
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Huang Y, Lu M, Wang Y, Zhang C, Cao Y, Zhang X. Podoplanin: A potential therapeutic target for thrombotic diseases. Front Neurol 2023; 14:1118843. [PMID: 36970507 PMCID: PMC10033871 DOI: 10.3389/fneur.2023.1118843] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 02/22/2023] [Indexed: 03/12/2023] Open
Abstract
As a specific lymphatic marker and a key ligand of C-type lectin-like receptor 2 (CLEC-2), podoplanin (Pdpn) is involved in various physiological and pathological processes such as growth and development, respiration, blood coagulation, lymphangiogenesis, angiogenesis, and inflammation. Thrombotic diseases constitute a major cause of disability and mortality in adults, in which thrombosis and inflammation play a crucial role. Recently, increasing evidence demonstrates the distribution and function of this glycoprotein in thrombotic diseases such as atherosclerosis, ischemic stroke, venous thrombosis, ischemic-reperfusion injury (IRI) of kidney and liver, and myocardial infarction. Evidence showed that after ischemia, Pdpn can be acquired over time by a heterogeneous cell population, which may not express Pdpn in normal conditions. In this review, the research progresses in understanding the roles and mechanisms of podoplanin in thromobotic diseases are summarized. The challenges of podoplanin-targeted approaches for disease prognosis and preventions are also discussed.
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Affiliation(s)
- Yaqian Huang
- Department of Neurology, Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Manli Lu
- Department of Neurology, Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Yi Wang
- Department of Neurology, Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Chunyuan Zhang
- Department of Rehabilitation, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Yongjun Cao
- Department of Neurology, Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Xia Zhang
- Department of Neurology, Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, China
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Zhuang H, Hudson E, Han S, Arja RD, Hui W, Lu L, Reeves WH. Microvascular lung injury and endoplasmic reticulum stress in systemic lupus erythematosus-associated alveolar hemorrhage and pulmonary vasculitis. Am J Physiol Lung Cell Mol Physiol 2022; 323:L715-L729. [PMID: 36255715 PMCID: PMC9744657 DOI: 10.1152/ajplung.00051.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 10/13/2022] [Accepted: 10/13/2022] [Indexed: 12/14/2022] Open
Abstract
Human COPA mutations affecting retrograde Golgi-to-endoplasmic reticulum (ER) protein transport cause diffuse alveolar hemorrhage (DAH) and ER stress ("COPA syndrome"). Patients with SLE also can develop DAH. C57BL/6 (B6) mice with pristane-induced lupus develop monocyte-dependent DAH indistinguishable from human DAH, whereas BALB/c mice are resistant. We examined Copa and ER stress in pristane-induced lupus. Copa expression, ER stress, vascular injury, and apoptosis were assessed in mice and COPA was quantified in blood from patients with SLE. Copa mRNA and protein expression were impaired in B6 mice with pristane-induced DAH, but not in pristane-treated BALB/c mice. An ER stress response (increased Hsp5a/BiP, Ddit3/CHOP, Eif2a, and spliced Xbp1) was seen in lungs from pristane-treated B6, but not BALB/c, mice. Resistance of BALB/c mice to DAH was overcome by treating them with low-dose thapsigargin plus pristane. CB6F1 mice did not develop DAH or ER stress, suggesting that susceptibility was recessive. Increased pulmonary expression of von Willebrand factor (Vwf), a marker of endothelial injury, and the chemokine Ccl2 in DAH suggested that pristane promotes lung microvascular injury and monocyte recruitment. Consistent with that possibility, lung endothelial cells and infiltrating bone marrow-derived cells from pristane-treated B6 mice expressed BiP and showed evidence of apoptosis (annexin-V and activated caspase-3 staining). COPA expression also was low in patients with SLE with lung involvement. Pristane-induced DAH may be initiated by endothelial injury, resulting in ER stress, apoptosis of lung endothelial cells, and recruitment of myeloid cells that propagate lung injury. The pathogenesis of DAH in SLE and COPA syndrome may overlap.
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Affiliation(s)
- Haoyang Zhuang
- Division of Rheumatology, Allergy, & Clinical Immunology, University of Florida, Gainesville, Florida
| | - Erin Hudson
- Division of Rheumatology, Allergy, & Clinical Immunology, University of Florida, Gainesville, Florida
| | - Shuhong Han
- Division of Rheumatology, Allergy, & Clinical Immunology, University of Florida, Gainesville, Florida
| | - Rawad Daniel Arja
- Division of Rheumatology, Allergy, & Clinical Immunology, University of Florida, Gainesville, Florida
| | - Winnie Hui
- Division of Rheumatology, Allergy, & Clinical Immunology, University of Florida, Gainesville, Florida
| | - Li Lu
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, Florida
| | - Westley H Reeves
- Division of Rheumatology, Allergy, & Clinical Immunology, University of Florida, Gainesville, Florida
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, Florida
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10
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Han S, Zhuang H, Arja RD, Reeves WH. A novel monocyte differentiation pattern in pristane-induced lupus with diffuse alveolar hemorrhage. eLife 2022; 11:e76205. [PMID: 36264674 PMCID: PMC9584606 DOI: 10.7554/elife.76205] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 10/10/2022] [Indexed: 11/29/2022] Open
Abstract
Pristane causes chronic peritoneal inflammation resulting in lupus, which in C57BL/6 mice is complicated by lung microvascular injury and diffuse alveolar hemorrhage (DAH). Mineral oil (MO) also causes inflammation, but not lupus or DAH. Since monocyte depletion prevents DAH, we examined the role of monocytes in the disease. Impaired bone marrow (BM) monocyte egress in Ccr2-/- mice abolished DAH, confirming the importance of monocyte recruitment to the lung. Circulating Ly6Chi monocytes from pristane-treated mice exhibited increased annexin-V staining in comparison with MO-treated controls without evidence of apoptosis, suggesting that pristane alters the distribution of phosphatidylserine in the plasma membrane before or shortly after monocyte egress from the BM. Plasma membrane asymmetry also was impaired in Nr4a1-regulated Ly6Clo/- 'patrolling' monocytes, which are derived from Ly6Chi precursors. Patrolling Ly6Clo/- monocytes normally promote endothelial repair, but their phenotype was altered in pristane-treated mice. In contrast to MO-treated controls, Nr4a1-regulated Ly6Clo/- monocytes from pristane-treated mice were CD138+, expressed more TremL4, a protein that amplifies TLR7 signaling, and exuberantly produced TNFα in response to TLR7 stimulation. TremL4 expression on these novel CD138+ monocytes was regulated by Nr4a1. Thus, monocyte CD138, high TremL4 expression, and annexin-V staining may define an activated/inflammatory subtype of patrolling monocytes associated with DAH susceptibility. By altering monocyte development, pristane exposure may generate activated Ly6Chi and Ly6Clo/- monocytes, contributing to lung microvascular endothelial injury and DAH susceptibility.
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Affiliation(s)
- Shuhong Han
- Division of Rheumatology, Allergy, & Clinical Immunology, University of FloridaGainesvilleUnited States
| | - Haoyang Zhuang
- Division of Rheumatology, Allergy, & Clinical Immunology, University of FloridaGainesvilleUnited States
| | - Rawad Daniel Arja
- Division of Rheumatology, Allergy, & Clinical Immunology, University of FloridaGainesvilleUnited States
| | - Westley H Reeves
- Division of Rheumatology, Allergy, & Clinical Immunology, University of FloridaGainesvilleUnited States
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11
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Hepatic Ly6C Lo Non-Classical Monocytes Have Increased Nr4a1 (Nur77) in Murine Biliary Atresia. J Clin Med 2022; 11:jcm11185290. [PMID: 36142937 PMCID: PMC9504567 DOI: 10.3390/jcm11185290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/31/2022] [Accepted: 09/03/2022] [Indexed: 11/17/2022] Open
Abstract
Biliary atresia (BA) is a rapidly progressive perinatal inflammatory disease, resulting in liver failure. Hepatic Ly6CLo non-classical monocytes promote the resolution of perinatal liver inflammation during rhesus rotavirus-mediated (RRV) BA in mice. In this study, we aim to investigate the effects of inflammation on the transcription factor Nr4a1, a known regulator of non-classical monocytes. Nr4a1-GFP reporter mice were injected with PBS for control or RRV within 24 h of delivery to induce perinatal liver inflammation. GFP expression on myeloid immune populations in the liver and bone marrow (BM) was quantified 3 and 14 days after injection using flow cytometry. Statistical significance was determined using a student’s t-test and ANOVA, with a p-value < 0.05 for significance. Our results demonstrate that non-classical monocytes in the neonatal liver exhibit the highest mean fluorescence intensity (MFI) of Nr4a1 (Ly6CLo MFI 6344 vs. neutrophils 3611 p < 0.001; macrophages 2782; p < 0.001; and Ly6CHi classical monocytes 4485; p < 0.0002). During inflammation, hepatic Ly6CLo non-classical monocytes showed a significant increase in Nr4a1 expression intensity from 6344 to 7600 (p = 0.012), while Nr4a1 expression remained unchanged on the other myeloid populations. These findings highlight the potential of using Nr4a1 as a regulator of neonatal hepatic Ly6CLo non-classical monocytes to mitigate perinatal liver inflammation.
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12
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Wakabayashi A, Yoshinaga M, Takeuchi O. TANK prevents IFN-dependent fatal diffuse alveolar hemorrhage by suppressing DNA-cGAS aggregation. Life Sci Alliance 2021; 5:5/2/e202101067. [PMID: 34819357 PMCID: PMC8616552 DOI: 10.26508/lsa.202101067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 11/11/2021] [Accepted: 11/12/2021] [Indexed: 11/24/2022] Open
Abstract
Diffuse alveolar hemorrhage (DAH) is one of the serious complications associated with systemic lupus erythematosus, an autoimmune disease whose pathogenesis involves type I IFNs and cytokines. Here, we show that TANK, a negative regulator of the NF-κB signaling via suppression of TRAF6 ubiquitination, is critical for the amelioration of fatal DAH caused by lung vascular endothelial cell death in a mouse model of systemic lupus erythematosus. The development of fatal DAH in the absence of TANK is mediated by type I IFN signaling, but not IL-6. We further uncover that STING, an adaptor essential for the signaling of cytoplasmic DNA sensor cyclic GMP-AMP (cGAMP) synthase (cGAS), plays a critical role in DAH under Tank deficiency. TANK controls cGAS-mediated cGAMP production and suppresses DNA-mediated induction of IFN-stimulated genes in macrophages by inhibiting the formation of DNA-cGAS aggregates containing ubiquitin. Collectively, TANK inhibits the cGAS-dependent recognition of cytoplasmic DNA to prevent fatal DAH in the murine lupus model.
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Affiliation(s)
- Atsuko Wakabayashi
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Masanori Yoshinaga
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Osamu Takeuchi
- Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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13
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Guo Q, Yaron JR, Wallen JW, Browder KF, Boyd R, Olson TL, Burgin M, Ulrich P, Aliskevich E, Schutz LN, Fromme P, Zhang L, Lucas AR. PEGylated Serp-1 Markedly Reduces Pristane-Induced Experimental Diffuse Alveolar Hemorrhage, Altering uPAR Distribution, and Macrophage Invasion. Front Cardiovasc Med 2021; 8:633212. [PMID: 33665212 PMCID: PMC7921738 DOI: 10.3389/fcvm.2021.633212] [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] [Received: 11/24/2020] [Accepted: 01/20/2021] [Indexed: 12/22/2022] Open
Abstract
Diffuse alveolar hemorrhage (DAH) is one of the most serious clinical complications of systemic lupus erythematosus (SLE). The prevalence of DAH is reported to range from 1 to 5%, but while DAH is considered a rare complication there is a reported 50-80% mortality. There is at present no proven effective treatment for DAH and the therapeutics that have been tested have significant side effects. There is a clear necessity to discover new drugs to improve outcomes in DAH. Serine protease inhibitors, serpins, regulate thrombotic and thrombolytic protease cascades. We are investigating a Myxomavirus derived immune modulating serpin, Serp-1, as a new class of immune modulating therapeutics for vasculopathy and lung hemorrhage. Serp-1 has proven efficacy in models of herpes virus-induced arterial inflammation (vasculitis) and lung hemorrhage and has also proved safe in a clinical trial in patients with unstable coronary syndromes and stent implant. Here, we examine Serp-1, both as a native secreted protein expressed by CHO cells and as a polyethylene glycol modified (PEGylated) variant (Serp-1m5), for potential therapy in DAH. DAH was induced by intraperitoneal (IP) injection of pristane in C57BL/6J (B6) mice. Mice were treated with 100 ng/g bodyweight of either Serp-1 as native 55 kDa secreted glycoprotein, or as Serp-1m5, or saline controls after inducing DAH. Treatments were repeated daily for 14 days (6 mice/group). Serp-1 partially and Serp-1m5 significantly reduced pristane-induced DAH when compared with saline as assessed by gross pathology and H&E staining (Serp-1, p = 0.2172; Serp-1m5, p = 0.0252). Both Serp-1m5 and Serp-1 treatment reduced perivascular inflammation and reduced M1 macrophage (Serp-1, p = 0.0350; Serp-1m5, p = 0.0053), hemosiderin-laden macrophage (Serp-1, p = 0.0370; Serp-1m5, p = 0.0424) invasion, and complement C5b/9 staining. Extracellular urokinase-type plasminogen activator receptor positive (uPAR+) clusters were significantly reduced (Serp-1, p = 0.0172; Serp-1m5, p = 0.0025). Serp-1m5 also increased intact uPAR+ alveoli in the lung (p = 0.0091). In conclusion, Serp-1m5 significantly reduces lung damage and hemorrhage in a pristane model of SLE DAH, providing a new potential therapeutic approach.
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Affiliation(s)
- Qiuyun Guo
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States.,Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jordan R Yaron
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - John W Wallen
- Exalt Therapeutics LLC, Las Vegas, NV, United States
| | - Kyle F Browder
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Ryan Boyd
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Tien L Olson
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Michelle Burgin
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Peaches Ulrich
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Emily Aliskevich
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Lauren N Schutz
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Petra Fromme
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Liqiang Zhang
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
| | - Alexandra R Lucas
- Center for Personalized Diagnostics and Center for Immunotherapy, Vaccines and Virotherapy, The Biodesign Institute, Arizona State University, Tempe, AZ, United States
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14
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Zhao M, Jiang J, Zhao M, Chang C, Wu H, Lu Q. The Application of Single-Cell RNA Sequencing in Studies of Autoimmune Diseases: a Comprehensive Review. Clin Rev Allergy Immunol 2020; 60:68-86. [PMID: 33236283 DOI: 10.1007/s12016-020-08813-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2020] [Indexed: 01/15/2023]
Abstract
Complex composition is one of the most important features of the immune system, involving many types of organs, tissues, cells, and molecules that perform immune functions. The normal function of each component of the immune system is the guarantee for maintaining the relatively stable immune function of the body. When the self-immune tolerance mechanism of the body is unregulated or destroyed, the immune system reacts to autoantigens, resulting in damage to self-tissues and organs or an immunopathological state with abnormal functions. Autoimmune diseases are diverse, and their pathogenesis is complicated. Various immune cells and their interactions play significant roles in the occurrence and development of diseases. The solution to heterogeneity of immune cells is the basic science and translational understanding of how genes and the environment interact to induce disease so that we can develop personalized medicine, a goal that has to this point eluded scientists. Single-cell RNA sequencing (scRNA-Seq) refers to a new technique allowing high-throughput sequencing analysis of the whole transcriptome to reveal the gene expression status of individual cells. It has emerged as an indispensable tool in the field of life science research, and can help identify the complex mechanism of cell heterogeneity, discover new cell subsets, and help uncover the molecular mechanisms of pathogenesis, the evolution of disorders, and drug resistance. This information can provide us with new strategies for diagnosis and prognostic evaluation, as well as monitoring treatment responses. In this review, we summarize the crucial experimental procedures used for single-cell RNA sequencing, and the current applications of this technique to study autoimmune diseases are described in detail. This technique will be widely used in more in-depth studies of autoimmune diseases and will contribute to the diagnosis and therapies of these disorders.
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Affiliation(s)
- Mingming Zhao
- Department of Dermatology, the Second Xiangya Hospital, Central South University, 410011, Changsha, Hunan, People's Republic of China.,Hunan Key Laboratory of Medical Epigenomics, 410011, Changsha, Hunan, People's Republic of China
| | - Jiao Jiang
- Department of Dermatology, the Second Xiangya Hospital, Central South University, 410011, Changsha, Hunan, People's Republic of China.,Hunan Key Laboratory of Medical Epigenomics, 410011, Changsha, Hunan, People's Republic of China
| | - Ming Zhao
- Department of Dermatology, the Second Xiangya Hospital, Central South University, 410011, Changsha, Hunan, People's Republic of China.,Hunan Key Laboratory of Medical Epigenomics, 410011, Changsha, Hunan, People's Republic of China
| | - Christopher Chang
- Division of Pediatric Immunology and Allergy, Joe DiMaggio Children's Hospital, Hollywood, FL, 33021, USA.,Division of Rheumatology, Allergy and Clinical Immunology, University of California, Davis, CA, 95616, USA
| | - Haijing Wu
- Department of Dermatology, the Second Xiangya Hospital, Central South University, 410011, Changsha, Hunan, People's Republic of China. .,Hunan Key Laboratory of Medical Epigenomics, 410011, Changsha, Hunan, People's Republic of China.
| | - Qianjin Lu
- Department of Dermatology, the Second Xiangya Hospital, Central South University, 410011, Changsha, Hunan, People's Republic of China. .,Hunan Key Laboratory of Medical Epigenomics, 410011, Changsha, Hunan, People's Republic of China.
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15
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Mohamedaly S, Alkhani A, Nijagal A. The relative abundance of monocyte subsets determines susceptibility to perinatal hepatic inflammation. JOURNAL OF CLINICAL & CELLULAR IMMUNOLOGY 2020; 11:602. [PMID: 36304699 PMCID: PMC9603689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The devastating consequences of perinatal liver inflammation contribute to a pressing need to develop therapeutics for the diseases that underly this condition. Biliary atresia (BA) is a perinatal inflammatory disease of the liver that results in obliterative cholangiopathy and rapidly progresses to liver failure, requiring transplantation. The ability to develop targeted therapies requires an understanding of the immune mechanisms that mitigate perinatal liver inflammation. This article reviews our recent findings demonstrating that in a murine model of perinatal hepatic inflammation, Ly6cLo non-classical monocytes express a pro-reparative transcriptomic profile and that the relative abundance of Ly6cLo monocytes promotes resolution of perinatal liver inflammation, rendering neonatal pups resistant to disease. We also examine the lineage relationship between monocyte subsets, reviewing data that suggests classical monocytes are a precursor for non-classical monocytes, and the alternative possibility that separate progenitors exist for each subset. Although a precursor-product relationship between classical and non-classical monocytes might exist in certain environments, we argue that they may also arise from separate progenitors, which is evident by sustained Ly6cLo non-classical monocyte expansion when Ly6cHi monocytes are absent. An improved understanding of monocyte subsets and their developmental trajectories during perinatal hepatic inflammation will provide insight into how therapies directed at controlling monocyte function may help alleviate the devastating consequences of diseases like BA.
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Affiliation(s)
| | | | - Amar Nijagal
- ‡ Corresponding Author: Amar Nijagal, MD, Assistant Professor of Surgery, Division of Pediatric Surgery, 513 Parnassus Avenue, HSW 1652, Campus Box 0570, University of CA, San Francisco, San Francisco, CA 94143-0570, Office: 415-476-4086; Fax: 415-476-2314,
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16
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Miyagawa F, Tagaya Y, Ozato K, Horie K, Asada H. Inflammatory monocyte-derived dendritic cells mediate autoimmunity in murine model of systemic lupus erythematosus. J Transl Autoimmun 2020; 3:100060. [PMID: 32743540 PMCID: PMC7388367 DOI: 10.1016/j.jtauto.2020.100060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/18/2020] [Accepted: 07/08/2020] [Indexed: 12/16/2022] Open
Abstract
Using a mouse model of systemic lupus erythematosus (SLE), we recently demonstrated that the two major manifestations of SLE are mechanistically independent because the type I IFN pathway leads to the autoantibody production whereas the NF-κB activation is sufficient for the development of glomerulonephritis. To further advance our understandings on the molecular pathways regulating the development of SLE, we studied the role of IRF8 because it controls both type I IFN and NF-κB pathways and saw that IRF8-deficient mice failed to develop either glomerulonephritis or the autoantibody production. Furthermore, these genetically engineered mice prompted us to realize the important role of Ly6Chigh inflammatory monocytes in the development of SLE. These monocytes migrate to the peritoneal cavity in WT and IRF7-deficient mice but not in IRF8-deficient mice, and there they produce both type I IFN and proinflammatory cytokines in WT mice, while in IRF7-deficient mice they only produce proinflammatory cytokines. Upon migration to the spleen, Ly6Chigh inflammatory monocytes differentiate into dendritic cells (DCs) which are capable of producing proinflammatory cytokines in response to dsDNA autoantigen. Collectively, type I IFN produced from inflammatory monocytes/monocyte-derived DCs might be essential for autoantibody production whereas proinflammatory cytokines produced from them might mediate tissue damages in this model. Our study reveals a specialized role for monocyte-derived antigen presenting cells in autoimmunity. Plasticity of monocyte might play an important role not only in the pathogenesis of the disease but also in flare-ups of the disease.
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Affiliation(s)
- Fumi Miyagawa
- Department of Dermatology, Nara Medical University School of Medicine, 840 Shijo, Kashihara, Nara, 634-8522, Japan
| | - Yutaka Tagaya
- Cell Biology Lab, Division of Infectious Agents and Cancer, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Keiko Ozato
- Laboratory of Molecular Growth Regulation, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Kyoji Horie
- Department of Physiology II, Nara Medical University School of Medicine, 840 Shijo, Kashihara, Nara, 634-8522, Japan
| | - Hideo Asada
- Department of Dermatology, Nara Medical University School of Medicine, 840 Shijo, Kashihara, Nara, 634-8522, Japan
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17
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Ly6c Lo non-classical monocytes promote resolution of rhesus rotavirus-mediated perinatal hepatic inflammation. Sci Rep 2020; 10:7165. [PMID: 32346042 PMCID: PMC7188847 DOI: 10.1038/s41598-020-64158-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 04/11/2020] [Indexed: 12/02/2022] Open
Abstract
Perinatal hepatic inflammation can have devastating consequences. Monocytes play an important role in the initiation and resolution of inflammation, and their diverse functions can be attributed to specific cellular subsets: pro-inflammatory or classical monocytes (Ly6cHi) and pro-reparative or non-classical monocytes (Ly6cLo). We hypothesized that inherent differences in Ly6cHi classical monocytes and Ly6cLo non-classical monocytes determine susceptibility to perinatal hepatic inflammation in late gestation fetuses and neonates. We found an anti-inflammatory transcriptional profile expressed by Ly6cLo non-classical monocytes, and a physiologic abundance of these cells in the late gestation fetal liver. Unlike neonatal pups, late gestation fetuses proved to be resistant to rhesus rotavirus (RRV) mediated liver inflammation. Furthermore, neonatal pups were rendered resistant to RRV-mediated liver injury when Ly6cLo non-classical monocytes were expanded. Pharmacologic inhibition of Ly6cLo non-classical monocytes in this setting restored susceptibility to RRV-mediated disease. These data demonstrate that Ly6cLo monocytes promote resolution of perinatal liver inflammation in the late gestation fetus, where there is a physiologic expansion of non-classical monocytes, and in the neonatal liver upon experimental expansion of these cells. Therapeutic strategies directed towards enhancing Ly6cLo non-classical monocyte function may mitigate the detrimental effects of perinatal liver inflammation.
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