1
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Zhu L, Jian X, Zhou B, Liu R, Muñoz M, Sun W, Xie L, Chen X, Peng C, Maurer M, Li J. Gut microbiota facilitate chronic spontaneous urticaria. Nat Commun 2024; 15:112. [PMID: 38168034 PMCID: PMC10762022 DOI: 10.1038/s41467-023-44373-x] [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: 03/21/2023] [Accepted: 12/11/2023] [Indexed: 01/05/2024] Open
Abstract
Chronic spontaneous urticaria (CSU) comes with gut dysbiosis, but its relevance remains elusive. Here we use metagenomics sequencing and short-chain fatty acids metabolomics and assess the effects of human CSU fecal microbial transplantation, Klebsiella pneumoniae, Roseburia hominis, and metabolites in vivo. CSU gut microbiota displays low diversity and short-chain fatty acids production, but high gut Klebsiella pneumoniae levels, negatively correlates with blood short-chain fatty acids levels and links to high disease activity. Blood lipopolysaccharide levels are elevated, link to rapid disease relapse, and high gut levels of conditional pathogenic bacteria. CSU microbiome transfer and Klebsiella pneumoniae transplantation facilitate IgE-mediated mast cell(MC)-driven skin inflammatory responses and increase intestinal permeability and blood lipopolysaccharide accumulation in recipient mice. Transplantation of Roseburia hominis and caproate administration protect recipient mice from MC-driven skin inflammation. Here, we show gut microbiome alterations, in CSU, may reduce short-chain fatty acids and increase lipopolysaccharide levels, respectively, and facilitate MC-driven skin inflammation.
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Affiliation(s)
- Lei Zhu
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Furong Labratory, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xingxing Jian
- Bioinformatics Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Bingjing Zhou
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Furong Labratory, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Runqiu Liu
- Department of Dermatology, the First people's Hospital of Yancheng, Yancheng Clinical College of Xuzhou Medical University, Yancheng, Jiangsu, China
| | - Melba Muñoz
- Institute of Allergology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology, Berlin, Germany
| | - Wan Sun
- BGI, Complex building, Beishan Industrial Zone, Yantian District, Shenzhen, China
| | - Lu Xie
- Bioinformatics Center, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiang Chen
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Furong Labratory, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Cong Peng
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Furong Labratory, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Marcus Maurer
- Institute of Allergology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Allergology and Immunology, Berlin, Germany.
| | - Jie Li
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Furong Labratory, Changsha, Hunan, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China.
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2
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Cai R, Zhou C, Tang R, Meng Y, Zeng J, Li Y, Wen X. Current insights on gut microbiome and chronic urticaria: progress in the pathogenesis and opportunities for novel therapeutic approaches. Gut Microbes 2024; 16:2382774. [PMID: 39078229 PMCID: PMC11290762 DOI: 10.1080/19490976.2024.2382774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 07/12/2024] [Accepted: 07/17/2024] [Indexed: 07/31/2024] Open
Abstract
Chronic urticaria (CU) is a prevalent skin disorder greatly impacting the patients' life quality, in which immune dysregulation mediated by gut microbiome plays a significant role. Several studies have found the gut dysbiosis exists in patients with CU. In addition, infection may also be one of the causes of CU. The primary treatment currently used for CU is the second-generation non-sedating H1-antihistamines (nsAH). However, there are some limitations in current therapies. Based on the latest evidence, this review provides an updated overview of how the gut dysbiosis influences CU development, explores potential therapeutic approaches based on the gut microbiota and summarizes the interaction between gut microbiota and current treatment.
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Affiliation(s)
- Rui Cai
- West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Changhan Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Ruisi Tang
- West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yuanling Meng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Jumei Zeng
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yuqing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Xiang Wen
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Laboratory of Dermatology, Clinical Institute of Inflammation and Immunology, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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3
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Wang RM, Mesfin JM, Karkanitsa M, Ungerleider JL, Zelus E, Zhang Y, Kawakami Y, Kawakami Y, Kawakami T, Christman KL. Immunomodulatory contribution of mast cells to the regenerative biomaterial microenvironment. NPJ Regen Med 2023; 8:53. [PMID: 37730736 PMCID: PMC10511634 DOI: 10.1038/s41536-023-00324-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 08/31/2023] [Indexed: 09/22/2023] Open
Abstract
Bioactive immunomodulatory biomaterials have shown promise for influencing the immune response to promote tissue repair and regeneration. Macrophages and T cells have been associated with this response; however, other immune cell types have been traditionally overlooked. In this study, we investigated the role of mast cells in the regulation of the immune response to decellularized biomaterial scaffolds using a subcutaneous implant model. In mast cell-deficient mice, there was dysregulation of the expected M1 to M2 macrophage transition typically induced by the biomaterial scaffold. Polarization progression deviated in a sex-specific manner with an early transition to an M2 profile in female mice, while the male response was unable to properly transition past a pro-inflammatory M1 state. Both were reversed with adoptive mast cell transfer. Further investigation of the later-stage immune response in male mice determined a greater sustained pro-inflammatory gene expression profile, including the IL-1 cytokine family, IL-6, alarmins, and chemokines. These results highlight mast cells as another important cell type that influences the immune response to pro-regenerative biomaterials.
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Affiliation(s)
- Raymond M Wang
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Joshua M Mesfin
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Maria Karkanitsa
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Jessica L Ungerleider
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Emma Zelus
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA
| | - Yuxue Zhang
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Yu Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, California, 92037, USA
- Department of Dermatology, University of California San Diego, School of Medicine, La Jolla, CA, 92093, USA
| | - Yuko Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, California, 92037, USA
- Department of Dermatology, University of California San Diego, School of Medicine, La Jolla, CA, 92093, USA
| | - Toshiaki Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, California, 92037, USA
- Department of Dermatology, University of California San Diego, School of Medicine, La Jolla, CA, 92093, USA
| | - Karen L Christman
- Shu Chien-Gene Lay Department of Bioengineering, Sanford Consortium of Regenerative Medicine, University of California San Diego, 2880 Torrey Pines Scenic Drive, La Jolla, CA, 92037, USA.
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De Zuani M, Dal Secco C, Tonon S, Arzese A, Pucillo CEM, Frossi B. LPS Guides Distinct Patterns of Training and Tolerance in Mast Cells. Front Immunol 2022; 13:835348. [PMID: 35251027 PMCID: PMC8891506 DOI: 10.3389/fimmu.2022.835348] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 01/26/2022] [Indexed: 11/17/2022] Open
Abstract
Mast cells (MCs) are tissue-resident, long lived innate immune cells with important effector and immunomodulatory functions. They are equipped with an eclectic variety of receptors that enable them to sense multiple stimuli and to generate specific responses according on the type, strength and duration of the stimulation. Several studies demonstrated that myeloid cells can retain immunological memory of their encounters – a process termed ‘trained immunity’ or ‘innate immune memory’. As MCs are among the one of first cells to come into contact with the external environment, it is possible that such mechanisms of innate immune memory might help shaping their phenotype and effector functions; however, studies on this aspect of MC biology are still scarce. In this manuscript, we investigated the ability of MCs primed with different stimuli to respond to a second stimulation with the same or different ligands, and determined the molecular and epigenetic drivers of these responses. Our results showed that, while the stimulation with IgE and β-glucan failed to induce either tolerant or trained phenotypes, LPS conditioning was able to induce a profound and long-lasting remodeling of the signaling pathways involved in the response against LPS or fungal pathogens. On one side, LPS induced a strong state of unresponsiveness to secondary LPS stimulation due to the impairment of the PI3K-AKT signaling pathway, which resulted in the reduced activation of NF-κB and the decreased release of TNF-α and IL-6, compared to naïve MCs. On the other side, LPS primed MCs showed an increased release of TNF-α upon fungal infection with live Candida albicans, thus suggesting a dual role of LPS in inducing both tolerance and training phenotypes depending on the secondary challenge. Interestingly, the inhibition of HDAC during LPS stimulation partially restored the response of LPS-primed MCs to a secondary challenge with LPS, but failed to revert the increased cytokine production of these cells in response to C. albicans. These data indicate that MCs, as other innate immune cells, can develop innate immune memory, and that different stimulatory environments can shape and direct MC specific responses towards the dampening or the propagation of the local inflammatory response.
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Affiliation(s)
- Marco De Zuani
- Department of Medicine, University of Udine, Udine, Italy.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
| | | | - Silvia Tonon
- Department of Medicine, University of Udine, Udine, Italy
| | | | | | - Barbara Frossi
- Department of Medicine, University of Udine, Udine, Italy
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5
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Sens J, Hoffmann D, Lange L, Vollmer Barbosa P, Morgan M, Falk CS, Schambach A. Knockout-Induced Pluripotent Stem Cells for Disease and Therapy Modeling of IL-10-Associated Primary Immunodeficiencies. Hum Gene Ther 2021; 32:77-95. [PMID: 33023317 DOI: 10.1089/hum.2020.235] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Samples from patients with rare diseases, such as primary immunodeficiencies, are often limited, which hampers careful analysis of the pathomechanisms involved in immune cell dysregulation. To overcome this issue, induced pluripotent stem cells (iPSCs) represent an almost inexhaustible cell source and thus provide an excellent opportunity to generate disease models for rare diseases and to validate new therapeutic approaches. To obtain a better understanding of primary immunodeficiencies associated with the interleukin (IL)-10 signaling pathway, for example, very-early-onset inflammatory bowel disease (VEO-IBD), we generated genetic knockouts (KOs) of IL-10RA (IL-10 receptor α-chain) and IL-10RB (IL-10 receptor β-chain) as well as the downstream targets of the IL-10-receptor (IL-10R) signal transducers and activators of transcription (STAT)1 and STAT3 via an sgRNA (single-guide RNA)-CRISPR-Cas9-expressing lentiviral system. IL-10 signaling-associated KO models and a VEO-IBD patient-derived iPSC clone were differentiated into macrophages for disease models. IL-10R- or STAT3-deficient disease models showed no IL-10-induced BCL3 or SOCS3 expression, whereas lipopolysaccharide (LPS) stimulation induced IL-10R independently of BCL3 and SOCS3 expression. Cytokine secretion profiles from iPSC-derived macrophage disease models showed that IL-10 was involved in many inflammatory cytokine secretions, which indicated formation of both anti- and proinflammatory macrophage phenotypes. Macrophage-secreted cytokines were separated into IL-10R- and STAT3-dependent (IL-6, TNF-α), or into IL-10R-, STAT1-, and STAT3-dependent cytokines (CCL2, CXCL10). Importantly, lentiviral correction restored IL-10-mediated regulation of LPS-induced cytokine secretion in corrected IL-10RB, STAT1, and VEO-IBD patient-derived disease models. Furthermore, treatment of IL-10RB-deficient macrophages with anti-inflammatory small molecules (SB202190, filgotinib) reduced proinflammatory cytokine secretion patterns. Taken together, the described iPSC KO models gave new insights into the pathomechanisms of immune cell dysregulation and served as model systems to test potential therapeutic approaches, including lentiviral gene therapy and targeted small-molecule treatment.
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Affiliation(s)
- Johanna Sens
- Institute of Experimental Hematology.,REBIRTH-Research Center for Translational Regenerative Medicine
| | - Dirk Hoffmann
- Institute of Experimental Hematology.,REBIRTH-Research Center for Translational Regenerative Medicine
| | - Lucas Lange
- Institute of Experimental Hematology.,REBIRTH-Research Center for Translational Regenerative Medicine
| | - Philippe Vollmer Barbosa
- Institute of Experimental Hematology.,REBIRTH-Research Center for Translational Regenerative Medicine.,Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany
| | - Michael Morgan
- Institute of Experimental Hematology.,REBIRTH-Research Center for Translational Regenerative Medicine
| | - Christine S Falk
- Institute of Transplant Immunology; Hannover Medical School, Hannover, Germany
| | - Axel Schambach
- Institute of Experimental Hematology.,REBIRTH-Research Center for Translational Regenerative Medicine.,Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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6
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Espinosa-Riquer ZP, Segura-Villalobos D, Ramírez-Moreno IG, Pérez Rodríguez MJ, Lamas M, Gonzalez-Espinosa C. Signal Transduction Pathways Activated by Innate Immunity in Mast Cells: Translating Sensing of Changes into Specific Responses. Cells 2020; 9:E2411. [PMID: 33158024 PMCID: PMC7693401 DOI: 10.3390/cells9112411] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/21/2020] [Accepted: 10/28/2020] [Indexed: 12/17/2022] Open
Abstract
Mast cells (MCs) constitute an essential cell lineage that participates in innate and adaptive immune responses and whose phenotype and function are influenced by tissue-specific conditions. Their mechanisms of activation in type I hypersensitivity reactions have been the subject of multiple studies, but the signaling pathways behind their activation by innate immunity stimuli are not so well described. Here, we review the recent evidence regarding the main molecular elements and signaling pathways connecting the innate immune receptors and hypoxic microenvironment to cytokine synthesis and the secretion of soluble or exosome-contained mediators in this cell type. When known, the positive and negative control mechanisms of those pathways are presented, together with their possible implications for the understanding of mast cell-driven chronic inflammation. Finally, we discuss the relevance of the knowledge about signaling in this cell type in the recognition of MCs as central elements on innate immunity, whose remarkable plasticity converts them in sensors of micro-environmental discontinuities and controllers of tissue homeostasis.
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Affiliation(s)
| | | | | | | | | | - Claudia Gonzalez-Espinosa
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados (Cinvestav), Unidad Sede Sur. Calzada de los Tenorios No. 235, Col. Granjas Coapa, Mexico City 14330, Mexico; (Z.P.E.-R.); (D.S.-V.); (I.G.R.-M.); (M.J.P.R.); (M.L.)
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Lajqi T, Pöschl J, Frommhold D, Hudalla H. The Role of Microbiota in Neutrophil Regulation and Adaptation in Newborns. Front Immunol 2020; 11:568685. [PMID: 33133082 PMCID: PMC7550463 DOI: 10.3389/fimmu.2020.568685] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 08/31/2020] [Indexed: 12/16/2022] Open
Abstract
Newborns are highly susceptible to infections and mainly rely on innate immune functions. Reduced reactivity, delayed activation and subsequent failure to resolve inflammation however makes the neonatal immune system a very volatile line of defense. Perinatal microbiota, nutrition and different extra-uterine factors are critical elements that define long-term outcomes and shape the immune system during the neonatal period. Neutrophils are first responders and represent a vital component of the immune system in newborns. They have long been regarded as merely executive immune cells, however this notion is beginning to shift. Neutrophils are shaped by their surrounding and adaptive elements have been described. The role of “innate immune memory” and the main triangle connection microbiome—neutrophil—adaptation will be discussed in this review.
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Affiliation(s)
- Trim Lajqi
- Heidelberg University Children's Hospital, Department of Neonatology, Heidelberg, Germany
| | - Johannes Pöschl
- Heidelberg University Children's Hospital, Department of Neonatology, Heidelberg, Germany
| | - David Frommhold
- Klinik für Kinderheilkunde und Jugendmedizin, Memmingen, Germany
| | - Hannes Hudalla
- Heidelberg University Children's Hospital, Department of Neonatology, Heidelberg, Germany
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Tang W, Wang H, Tian R, Saret S, Cheon H, Claudio E, Siebenlist U. Bcl-3 inhibits lupus-like phenotypes in BL6/lpr mice. Eur J Immunol 2020; 51:197-205. [PMID: 32652549 DOI: 10.1002/eji.202048584] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 05/22/2020] [Indexed: 11/06/2022]
Abstract
Bcl-3 is an atypical member of the IκB family that modulates NF-κB activity in nuclei. lpr mice carry the lpr mutation in Fas, resulting in functional loss of this death receptor; they serve as models for lupus erythematosus and autoimmune lymphoproliferation syndrome (ALPS). To explore the biologic roles of Bcl-3 in this disease model, we generated BL6/lpr mice lacking Bcl-3. Unlike lpr mice on an MRL background, BL6/lpr mice present with very mild lupus- or ALPS-like phenotypes. Bcl-3 KO BL6/lpr mice, however, developed severe splenomegaly, dramatically increased numbers of double negative T cells - a hallmark of human lupus, ALPS, and MRL/lpr mice - and exhibited inflammation in multiple organs, despite low levels of autoantibodies, similar to those in BL6/lpr mice. Loss of Bcl-3 specifically in T cells exacerbated select lupus-like phenotypes, specifically organ infiltration. Mechanistically, elevated levels of Tnfα in Bcl-3 KO BL6/lpr mice may promote lupus-like phenotypes, since loss of Tnfα in these mice reversed the pathology due to loss of Bcl-3. Contrary to the inhibitory functions of Bcl-3 revealed here, this regulator has also been shown to promote inflammation in different settings. Our findings highlight the profound, yet highly context-dependent roles of Bcl-3 in the development of inflammation-associated pathology.
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Affiliation(s)
- Wanhu Tang
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Hongshan Wang
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Ruxiao Tian
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Sun Saret
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - HeeJin Cheon
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Estefania Claudio
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Ulrich Siebenlist
- Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
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Microglial-specific depletion of TAK1 is neuroprotective in the acute phase after ischemic stroke. J Mol Med (Berl) 2020; 98:833-847. [PMID: 32382778 PMCID: PMC7297861 DOI: 10.1007/s00109-020-01916-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 04/01/2020] [Accepted: 04/22/2020] [Indexed: 12/24/2022]
Abstract
Abstract Transforming growth factor-β-activated kinase 1 (TAK1) is upregulated after cerebral ischemia and contributes to an aggravation of brain injury. TAK1 acts as a key regulator of NF-ΚB and the MAP kinases JNK and p38 and modulates post-ischemic neuroinflammation and apoptosis. Microglia are the main TAK1-expressing immunocompetent cells of the brain. However, little is known about the function and regulation of microglial TAK1 after cerebral ischemia. Tamoxifen-dependent conditional depletion of TAK1 in microglial cells was induced in Cx3cr1creER-Tak1fl/fl mice. The creER-negative Tak1fl/fl mice and vehicle-treated (corn oil) mice served as control groups. A transient intraluminal middle cerebral artery occlusion of 30 min followed by 6 h and 72 h of reperfusion was performed in male mice. Oxygen-glucose-deprivation (OGD) was performed with primary cortical glial cell cultures to examine the effect of microglial-specific and general (5Z-7-Oxozeaenol) TAK1 inhibition after different reperfusion times (1 h, 6 h, and 72 h). Cx3cr1creER-Tak1fl/fl mice showed reduced infarct sizes and improved neurological outcomes compared to the control group. The mRNA and protein levels of pro-inflammatory Il1b/IL-1β and Tnf/TNF-α in the peri-infarct zones of microglial-specific TAK1-depleted mice were significantly reduced. Furthermore, TAK1 depletion in vitro led to reduced cell death rates after OGD. Moreover, hypoxia-mediated activation of TAK1 and its downstream signalling proteins, JNK and p38, were dampened by microglial TAK1 depletion. In contrast, 5Z-7-Oxozeaenol-induced pharmacological inhibition of TAK1 completely diminished MAPK-signalling including the kinases JNK and p38 in all cells. Microglial TAK1 depletion abrogates post-ischemic neuroinflammation and apoptosis in the acute phase, hence might be considered as a potential target in the treatment of cerebral hypoxia. Key messages TAK1 is activated after cerebral ischemia and induces MAP kinases p38 and JNK. Activated TAK1 increases apoptosis rate and the level pro-inflammatory cytokines IL-1β and TNF-α. Microglial cells seem to be the main source of TAK1-mediated post-ischemic neuroinflammation. Microglial-specific TAK1-depletion mediates sustainable neuroprotective effects, which might be superior to global TAK1 inhibition.
Electronic supplementary material The online version of this article (10.1007/s00109-020-01916-9) contains supplementary material, which is available to authorized users.
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10
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Dampening of mast cell secondary responses to allergen involves specific signalling and epigenetic changes. Cell Immunol 2019; 344:103944. [PMID: 31213284 DOI: 10.1016/j.cellimm.2019.103944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 05/14/2019] [Accepted: 06/07/2019] [Indexed: 11/23/2022]
Abstract
Allergic diseases are increasing worldwide. Allergen and IgE dependent mast cell (MC) activation is the major initiator of these clinical symptoms. During this study, the effect of multiple exposures to the same allergen, on MC degranulation was studied. First, MC recovery in terms of surface expression of high affinity receptor FcεRI, and granule content after a primary allergen challenge was confirmed. Overall, previous exposure of MCs to allergen challenge led to a significant reduction in pre-stored mediator release during the secondary challenge at various time points and with various doses of allergen in vitro. The dampened response was not due to any defects in very early steps in signalling involving FcεRI activation. Inhibition of dampening response during secondary challenge by various inhibitors like wortmannin, tranylcypromine and pargyline, indicated the involvement of PI3K signalling and chromatin modifications. Our study provides insight into new therapeutic avenues for treating allergic disorders targeting MCs.
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11
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Huber M, Cato ACB, Ainooson GK, Freichel M, Tsvilovskyy V, Jessberger R, Riedlinger E, Sommerhoff CP, Bischoff SC. Regulation of the pleiotropic effects of tissue-resident mast cells. J Allergy Clin Immunol 2019; 144:S31-S45. [PMID: 30772496 DOI: 10.1016/j.jaci.2019.02.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 01/29/2019] [Accepted: 02/01/2019] [Indexed: 12/18/2022]
Abstract
Mast cells (MCs), which are best known for their detrimental role in patients with allergic diseases, act in a diverse array of physiologic and pathologic functions made possible by the plurality of MC types. Their various developmental avenues and distinct sensitivity to (micro-) environmental conditions convey extensive heterogeneity, resulting in diverse functions. We briefly summarize this heterogeneity, elaborate on molecular determinants that allow MCs to communicate with their environment to fulfill their tasks, discuss the protease repertoire stored in secretory lysosomes, and consider different aspects of MC signaling. Furthermore, we describe key MC governance mechanisms (ie, the high-affinity receptor for IgE [FcεRI]), the stem cell factor receptor KIT, the IL-4 system, and both Ca2+- and phosphatase-dependent mechanisms. Finally, we focus on distinct physiologic functions, such as chemotaxis, phagocytosis, host defense, and the regulation of MC functions at the mucosal barriers of the lung, gastrointestinal tract, and skin. A deeper knowledge of the pleiotropic functions of MC mediators, as well as the molecular processes of MC regulation and communication, should enable us to promote beneficial MC traits in physiology and suppress detrimental MC functions in patients with disease.
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Affiliation(s)
- Michael Huber
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, RWTH Aachen University, Aachen, Germany.
| | - Andrew C B Cato
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Eggenstein-Leopoldshafen, Germany
| | - George K Ainooson
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Eggenstein-Leopoldshafen, Germany
| | - Marc Freichel
- Institute of Pharmacology, Heidelberg University, Medical Faculty, Heidelberg, Germany
| | - Volodymyr Tsvilovskyy
- Institute of Pharmacology, Heidelberg University, Medical Faculty, Heidelberg, Germany
| | - Rolf Jessberger
- Institute for Physiological Chemistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Eva Riedlinger
- Institute of Laboratory Medicine, University Hospital, LMU Munich, Munich, Germany
| | | | - Stephan C Bischoff
- Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany.
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Wen J, Bai H, Chen N, Zhang W, Zhu X, Li P, Gong J. USP25 promotes endotoxin tolerance via suppressing K48-linked ubiquitination and degradation of TRAF3 in Kupffer cells. Mol Immunol 2018; 106:53-62. [PMID: 30579117 DOI: 10.1016/j.molimm.2018.12.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 12/07/2018] [Accepted: 12/14/2018] [Indexed: 12/30/2022]
Abstract
The inhibition of tumor necrosis factor receptor-associated factor 3 (TRAF3) degradation induces endotoxin tolerance (ET) in macrophages. However, the mechanisms leading to TRAF3 inhibition by ET are largely unknown. Here, we found that ubiquitin-specific peptidase 25 (USP25), a deubiquitinating enzyme (DUB), interacted with TRAF3 and stabilized ET in Kupffer cells (KCs). Lentiviral knockdown of USP25 activated K48-linked ubiquitination of TRAF3 and the cytoplasmic translocation of the Myd88-associated multiprotein complex in tolerized KCs. This outcome led to a subsequent activation of Myd88-dependent c-Jun N-terminal kinase (JNK) and p38-mediated downregulation of inflammatory cytokines. The overexpression of TRAF3 attenuated the proinflammatory effects of USP25 knockdown in tolerized KCs. Thus, our findings reveal a novel mechanism of endotoxin-mediated TRAF3 degradation in KCs.
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Affiliation(s)
- Jian Wen
- Department of Hepatobiliary Surgery, he Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - He Bai
- Department of Hepatobiliary Surgery, he Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Nan Chen
- Department of Hepatobiliary Surgery, he Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Wenfeng Zhang
- Department of Hepatobiliary Surgery, he Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Xiwen Zhu
- Department of Anesthesiology, the Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China
| | - Peizhi Li
- Department of Hepatobiliary Surgery, he Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China.
| | - Jianping Gong
- Department of Hepatobiliary Surgery, he Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400010, China.
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