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Gosain TP, Chugh S, Rizvi ZA, Chauhan NK, Kidwai S, Thakur KG, Awasthi A, Singh R. Mycobacterium tuberculosis strain with deletions in menT3 and menT4 is attenuated and confers protection in mice and guinea pigs. Nat Commun 2024; 15:5467. [PMID: 38937463 PMCID: PMC11211403 DOI: 10.1038/s41467-024-49246-5] [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: 08/06/2023] [Accepted: 05/29/2024] [Indexed: 06/29/2024] Open
Abstract
The genome of Mycobacterium tuberculosis encodes for a large repertoire of toxin-antitoxin systems. In the present study, MenT3 and MenT4 toxins belonging to MenAT subfamily of TA systems have been functionally characterized. We demonstrate that ectopic expression of these toxins inhibits bacterial growth and this is rescued upon co-expression of their cognate antitoxins. Here, we show that simultaneous deletion of menT3 and menT4 results in enhanced susceptibility of M. tuberculosis upon exposure to oxidative stress and attenuated growth in guinea pigs and mice. We observed reduced expression of transcripts encoding for proteins that are essential or required for intracellular growth in mid-log phase cultures of ΔmenT4ΔT3 compared to parental strain. Further, the transcript levels of proteins involved in efficient bacterial clearance were increased in lung tissues of ΔmenT4ΔT3 infected mice relative to parental strain infected mice. We show that immunization of mice and guinea pigs with ΔmenT4ΔT3 confers significant protection against M. tuberculosis infection. Remarkably, immunization of mice with ΔmenT4ΔT3 results in increased antigen-specific TH1 bias and activated memory T cell response. We conclude that MenT3 and MenT4 are important for M. tuberculosis pathogenicity and strains lacking menT3 and menT4 have the potential to be explored further as vaccine candidates.
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Affiliation(s)
- Tannu Priya Gosain
- Centre for Tuberculosis Research, Translational Health Sciences and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurugram Expressway, Faridabad, 121001, India
| | - Saurabh Chugh
- Centre for Tuberculosis Research, Translational Health Sciences and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurugram Expressway, Faridabad, 121001, India
| | - Zaigham Abbas Rizvi
- Centre for Immunobiology and Immunotherapy, Translational Health Sciences and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurugram Expressway, Faridabad, 121001, India
| | - Neeraj Kumar Chauhan
- Centre for Tuberculosis Research, Translational Health Sciences and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurugram Expressway, Faridabad, 121001, India
| | - Saqib Kidwai
- Centre for Tuberculosis Research, Translational Health Sciences and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurugram Expressway, Faridabad, 121001, India
| | - Krishan Gopal Thakur
- Structural Biology Laboratory, Council of Scientific and Industrial Research-Institute of Microbial Technology (CSIR-IMTECH), Chandigarh, 160036, India
| | - Amit Awasthi
- Centre for Immunobiology and Immunotherapy, Translational Health Sciences and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurugram Expressway, Faridabad, 121001, India
| | - Ramandeep Singh
- Centre for Tuberculosis Research, Translational Health Sciences and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad-Gurugram Expressway, Faridabad, 121001, India.
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2
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Alhallak K, Nagai J, Zaleski K, Marshall S, Salloum T, Derakhshan T, Hayashi H, Feng C, Kratchmarov R, Lai J, Kuchibhotla V, Nishida A, Balestrieri B, Laidlaw T, Dwyer DF, Boyce JA. Mast cells control lung type 2 inflammation via prostaglandin E 2-driven soluble ST2. Immunity 2024; 57:1274-1288.e6. [PMID: 38821053 PMCID: PMC11168874 DOI: 10.1016/j.immuni.2024.05.003] [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] [Revised: 01/26/2024] [Accepted: 05/06/2024] [Indexed: 06/02/2024]
Abstract
Severe asthma and sinus disease are consequences of type 2 inflammation (T2I), mediated by interleukin (IL)-33 signaling through its membrane-bound receptor, ST2. Soluble (s)ST2 reduces available IL-33 and limits T2I, but little is known about its regulation. We demonstrate that prostaglandin E2 (PGE2) drives production of sST2 to limit features of lung T2I. PGE2-deficient mice display diminished sST2. In humans with severe respiratory T2I, urinary PGE2 metabolites correlate with serum sST2. In mice, PGE2 enhanced sST2 secretion by mast cells (MCs). Mice lacking MCs, ST2 expression by MCs, or E prostanoid (EP)2 receptors by MCs showed reduced sST2 lung concentrations and strong T2I. Recombinant sST2 reduced T2I in mice lacking PGE2 or ST2 expression by MCs back to control levels. PGE2 deficiency also reversed the hyperinflammatory phenotype in mice lacking ST2 expression by MCs. PGE2 thus suppresses T2I through MC-derived sST2, explaining the severe T2I observed in low PGE2 states.
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Affiliation(s)
- Kinan Alhallak
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Jun Nagai
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Kendall Zaleski
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Sofia Marshall
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Tamara Salloum
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Tahereh Derakhshan
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Hiroaki Hayashi
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Chunli Feng
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Radomir Kratchmarov
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Juying Lai
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Virinchi Kuchibhotla
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Airi Nishida
- Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Barbara Balestrieri
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Tanya Laidlaw
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Daniel F Dwyer
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA
| | - Joshua A Boyce
- Departments of Medicine and Pediatrics, Harvard Medical School, Boston, MA, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, MA, USA.
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3
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Liu B, Jiang Q, Chen R, Zhang H, Xia Q, Shao C, Liu X, Wang M, Shi Y, Zhu J, Zhao R, Jiang H, Gao S, Li X, Zhou H, Yang C, Huang H. Tacrolimus alleviates pulmonary fibrosis progression through inhibiting the activation and interaction of ILC2 and monocytes. Int Immunopharmacol 2024; 132:111999. [PMID: 38581994 DOI: 10.1016/j.intimp.2024.111999] [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: 10/24/2023] [Revised: 03/27/2024] [Accepted: 04/01/2024] [Indexed: 04/08/2024]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a heterogeneous group of lung diseases with different etiologies and characterized by progressive fibrosis. This disease usually causes pulmonary structural remodeling and decreased pulmonary function. The median survival of IPF patients is 2-5 years. Predominantly accumulation of type II innate immune cells accelerates fibrosis progression by secreting multiple pro-fibrotic cytokines. Group 2 innate lymphoid cells (ILC2) and monocytes/macrophages play key roles in innate immunity and aggravate the formation of pro-fibrotic environment. As a potent immunosuppressant, tacrolimus has shown efficacy in alleviating the progression of pulmonary fibrosis. In this study, we found that tacrolimus is capable of suppressing ILC2 activation, monocyte differentiation and the interaction of these two cells. This effect further reduced activation of monocyte-derived macrophages (Mo-M), thus resulting in a decline of myofibroblast activation and collagen deposition. The combination of tacrolimus and nintedanib was more effective than either drug alone. This study will reveal the specific process of tacrolimus alleviating pulmonary fibrosis by regulating type II immunity, and explore the potential feasibility of tacrolimus combined with nintedanib in the treatment of pulmonary fibrosis. This project will provide new ideas for clinical optimization of anti-pulmonary fibrosis drug strategies.
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Affiliation(s)
- Bowen Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China
| | - Qiuyan Jiang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China
| | - Ruxuan Chen
- Department of Pulmonary and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Huizhe Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China; High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, 300070 Tianjin, China
| | - Qin Xia
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China; High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, 300070 Tianjin, China
| | - Chi Shao
- Department of Pulmonary and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Xiangning Liu
- Department of Pulmonary and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Mengqi Wang
- Department of Pulmonary and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Yujie Shi
- Department of Pulmonary and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Jingyan Zhu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China; High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, 300070 Tianjin, China
| | - Ruixi Zhao
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China
| | - Haixia Jiang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China; High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, 300070 Tianjin, China
| | - Shaoyan Gao
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China
| | - Xiaohe Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China
| | - Honggang Zhou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China; High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, 300070 Tianjin, China
| | - Cheng Yang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, 300000 Tianjin, China; High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, 300070 Tianjin, China
| | - Hui Huang
- Department of Pulmonary and Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China.
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4
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Koganesawa M, Dwyer D, Alhallak K, Nagai J, Zaleski K, Samuchiwal S, Hiroaki H, Nishida A, Hirsch TI, Brennan PJ, Puder M, Balestrieri B. Pla2g5 contributes to viral-like-induced lung inflammation through macrophage proliferation and LA/Ffar1 lung cell recruitment. Immunology 2024; 172:144-162. [PMID: 38361249 PMCID: PMC11057362 DOI: 10.1111/imm.13766] [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: 09/26/2023] [Accepted: 02/01/2024] [Indexed: 02/17/2024] Open
Abstract
Macrophages expressing group V phospholipase A2 (Pla2g5) release the free fatty acid (FFA) linoleic acid (LA), potentiating lung type 2 inflammation. Although Pla2g5 and LA increase in viral infections, their role remains obscure. We generated Pla2g5flox/flox mice, deleted Pla2g5 by using the Cx3cr1cre transgene, and activated bone marrow-derived macrophages (BM-Macs) with poly:IC, a synthetic double-stranded RNA that triggers a viral-like immune response, known Pla2g5-dependent stimuli (IL-4, LPS + IFNγ, IL-33 + IL-4 + GM-CSF) and poly:IC + LA followed by lipidomic and transcriptomic analysis. Poly:IC-activated Pla2g5flox/flox;Cx3cr1cre/+ BM-Macs had downregulation of major bioactive lipids and critical enzymes producing those bioactive lipids. In addition, AKT phosphorylation was lower in poly:IC-stimulated Pla2g5flox/flox;Cx3cr1cre/+ BM-Macs, which was not restored by adding LA to poly:IC-stimulated BM-Macs. Consistently, Pla2g5flox/flox;Cx3cr1cre/+ mice had diminished poly:IC-induced lung inflammation, including inflammatory macrophage proliferation, while challenging Pla2g5flox/flox;Cx3cr1cre/+ mice with poly:IC + LA partially restored lung inflammation and inflammatory macrophage proliferation. Finally, mice lacking FFA receptor-1 (Ffar1)-null mice had reduced poly:IC-induced lung cell recruitment and tissue macrophage proliferation, not corrected by LA. Thus, Pla2g5 contributes to poly:IC-induced lung inflammation by regulating inflammatory macrophage proliferation and LA/Ffar1-mediated lung cell recruitment and tissue macrophage proliferation.
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Affiliation(s)
- Masaya Koganesawa
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Daniel Dwyer
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Kinan Alhallak
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Jun Nagai
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Kendall Zaleski
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Sachin Samuchiwal
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Hayashi Hiroaki
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Airi Nishida
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Thomas I. Hirsch
- Department of Surgery and Vascular Biology Program Boston Children’s Hospital, Boston, MA
| | - Patrick J. Brennan
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
| | - Mark Puder
- Department of Surgery and Vascular Biology Program Boston Children’s Hospital, Boston, MA
| | - Barbara Balestrieri
- Division of Allergy and Clinical Immunology, Vinik Center for Translational Immunology Research, Brigham and Women’s Hospital, Boston, MA
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5
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Gong C, Jin Y, Wang X, Mao J, Wang D, Yu X, Chen S, Wang Y, Ma D, Fang X, Zhang K, Shu Q. Lack of S1PR2 in Macrophage Ameliorates Sepsis-associated Lung Injury through Inducing IL-33-mediated Type 2 Immunity. Am J Respir Cell Mol Biol 2024; 70:215-225. [PMID: 38061028 DOI: 10.1165/rcmb.2023-0075oc] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 12/07/2023] [Indexed: 03/02/2024] Open
Abstract
The function of type 2 immunity and mechanisms underlying the initiation of type 2 immunity after sepsis-induced lung injury remain unclear. Sphingosine-1-phosphate receptor 2 (S1PR2) has been demonstrated to modulate type 2 immunity in the context of asthma and pulmonary fibrosis. Thus, this study aims to investigate the role of type 2 immunity and whether and how S1PR2 regulates type 2 immunity in sepsis. Peripheral type 2 immune responses in patients with sepsis and healthy control subjects were assessed. The impact of S1PR2 on type 2 immunity in patients with sepsis and in a murine model of sepsis was further investigated. The type 2 innate immune responses were significantly increased in the circulation of patients 24 hours after sepsis, which was positively related to clinical complications and negatively correlated with S1PR2 mRNA expression. Animal studies showed that genetic deletion or pharmacological inhibition of S1PR2 induced type 2 innate immunity accumulation in the post-septic lungs. Mechanistically, S1PR2 deficiency promoted macrophage-derived interleukin (IL)-33 increase and the associated type 2 response in the lung. Furthermore, S1PR2-regulated IL-33 from macrophages mitigated lung injury after sepsis in mice. In conclusion, a lack of S1PR2 modulates the type 2 immune response by upregulating IL-33 release from macrophages and alleviates sepsis-induced lung injury. Targeting S1PR2 may have potential therapeutic value for sepsis treatment.
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Affiliation(s)
| | - Yue Jin
- Department of Anesthesiology, The First Affiliated Hospital, and
| | - Xi Wang
- Department of Anesthesiology, The First Affiliated Hospital, and
| | - Jiali Mao
- Department of Anesthesiology, The First Affiliated Hospital, and
| | - Dongdong Wang
- Department of Anesthesiology, The First Affiliated Hospital, and
| | - Xiangyang Yu
- Department of Anesthesiology, The First Affiliated Hospital, and
| | - Shiyu Chen
- Department of Anesthesiology, The First Affiliated Hospital, and
| | - Yang Wang
- Department of Intensive Care Unit, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China; and
| | - Daqing Ma
- Perioperative and Systems Medicine Laboratory, Children's Hospital, National Clinical Research Center for Child Health
- Division of Anaesthetics, Pain Medicine, and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Xiangming Fang
- Department of Anesthesiology, The First Affiliated Hospital, and
| | - Kai Zhang
- Department of Anesthesiology, The First Affiliated Hospital, and
| | - Qiang Shu
- Department of Thoracic and Cardiovascular Surgery
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6
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Hamu-Tanoue A, Takagi K, Taketomi Y, Miki Y, Nishito Y, Kano K, Aoki J, Matsuyama T, Kondo K, Dotake Y, Matsuyama H, Machida K, Murakami M, Inoue H. Group III secreted phospholipase A 2 -driven lysophospholipid pathway protects against allergic asthma. FASEB J 2024; 38:e23428. [PMID: 38236184 DOI: 10.1096/fj.202301976r] [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: 09/29/2023] [Revised: 12/21/2023] [Accepted: 01/03/2024] [Indexed: 01/19/2024]
Abstract
Asthma is a chronic inflammatory disease of the airways characterized by recurrent episodes of airway obstruction, hyperresponsiveness, remodeling, and eosinophilia. Phospholipase A2 s (PLA2 s), which release fatty acids and lysophospholipids from membrane phospholipids, have been implicated in exacerbating asthma by generating pro-asthmatic lipid mediators, but an understanding of the association between individual PLA2 subtypes and asthma is still incomplete. Here, we show that group III-secreted PLA2 (sPLA2 -III) plays an ameliorating, rather than aggravating, role in asthma pathology. In both mouse and human lungs, sPLA2 -III was expressed in bronchial epithelial cells and decreased during the asthmatic response. In an ovalbumin (OVA)-induced asthma model, Pla2g3-/- mice exhibited enhanced airway hyperresponsiveness, eosinophilia, OVA-specific IgE production, and type 2 cytokine expression as compared to Pla2g3+/+ mice. Lipidomics analysis showed that the pulmonary levels of several lysophospholipids, including lysophosphatidylcholine, lysophosphatidylethanolamine, and lysophosphatidic acid (LPA), were decreased in OVA-challenged Pla2g3-/- mice relative to Pla2g3+/+ mice. LPA receptor 2 (LPA2 ) agonists suppressed thymic stromal lymphopoietin (TSLP) expression in bronchial epithelial cells and reversed airway hyperresponsiveness and eosinophilia in Pla2g3-/- mice, suggesting that sPLA2 -III negatively regulates allergen-induced asthma at least by producing LPA. Thus, the activation of the sPLA2 -III-LPA pathway may be a new therapeutic target for allergic asthma.
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Affiliation(s)
- Asako Hamu-Tanoue
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Koichi Takagi
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yoshitaka Taketomi
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Center for Basic Technology Research, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Yoshimi Miki
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yasumasa Nishito
- Center for Basic Technology Research, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Kuniyuki Kano
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
| | - Junken Aoki
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
| | - Takahiro Matsuyama
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Kiyotaka Kondo
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yoichi Dotake
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Hiromi Matsuyama
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Kentaro Machida
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Makoto Murakami
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- AMED-CREST, Japan Agency for Medical Research and Development, Tokyo, Japan
| | - Hiromasa Inoue
- Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
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7
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Fernandes C, Casadevall A, Gonçalves T. Mechanisms of Alternaria pathogenesis in animals and plants. FEMS Microbiol Rev 2023; 47:fuad061. [PMID: 37884396 DOI: 10.1093/femsre/fuad061] [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: 05/08/2023] [Revised: 09/18/2023] [Accepted: 10/25/2023] [Indexed: 10/28/2023] Open
Abstract
Alternaria species are cosmopolitan fungi darkly pigmented by melanin that infect numerous plant species causing economically important agricultural spoilage of various food crops. Alternaria spp. also infect animals, being described as entomopathogenic fungi but also infecting warm-blooded animals, including humans. Their clinical importance in human health, as infection agents, lay in the growing number of immunocompromised patients. Moreover, Alternaria spp. are considered some of the most abundant and potent sources of airborne sensitizer allergens causing allergic respiratory diseases, as severe asthma. Among the numerous strategies deployed by Alternaria spp. to attack their hosts, the production of toxins, carrying critical concerns to public health as food contaminant, and the production of hydrolytic enzymes such as proteases, can be highlighted. Alternaria proteases also trigger allergic symptoms in individuals with fungal sensitization, acting as allergens and facilitating antigen access to the host subepithelium. Here, we review the current knowledge about the mechanisms of Alternaria pathogenesis in plants and animals, the strategies used by Alternaria to cope with the host defenses, and the involvement Alternaria allergens and mechanisms of sensitization.
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Affiliation(s)
- Chantal Fernandes
- CNC-UC - Center for Neuroscience and Cell Biology of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal
| | - Arturo Casadevall
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Wolfe Street, Room E5132, Baltimore, Maryland 21205, USA
| | - Teresa Gonçalves
- CNC-UC - Center for Neuroscience and Cell Biology of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal
- FMUC - Faculty of Medicine, University of Coimbra, Rua Larga, 3004-504 Coimbra, Portugal
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8
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Xu G(B, Pan YX, Mei W, Chen H. Single-Cell RNA Sequencing (scRNA-seq) Identifies L1CAM as a Key Mediator between Epithelial Tuft Cell and Innate Lymphoid Cell in the Colon of Hnrnp I Knockout Mice. Biomedicines 2023; 11:2734. [PMID: 37893107 PMCID: PMC10604312 DOI: 10.3390/biomedicines11102734] [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: 08/26/2023] [Revised: 09/26/2023] [Accepted: 10/05/2023] [Indexed: 10/29/2023] Open
Abstract
(1) Background: Knockout (KO) of heterogeneous nuclear ribonucleoprotein I (Hnrnp I) in mouse intestinal epithelial cells (IECs) induced a severe inflammatory response in the colon, followed by hyperproliferation. This study aimed to investigate the epithelial lineage dynamics and cell-cell communications that underlie inflammation and colitis. (2) Methods: Single cells were isolated from the colons of wildtype (WT) and KO mice and used in scRNA-seq. Whole colons were collected for immunofluorescence staining and cytokine assays. (3) Results: from scRNA-seq, the number of DCLK1 + colonic tuft cells was significantly higher in the Hnrnp I KO mice compared to the WT mice. This was confirmed by immunofluorescent staining of DCLK1. The DCLK1 + colonic tuft cells in KO mice developed unique communications with lymphocytes via interactions between surface L1 cell adhesion molecule (L1CAM) and integrins. In the KO mice colons, a significantly elevated level of inflammatory cytokines IL4, IL6, and IL13 were observed, which marks type-2 immune responses directed by group 2 innate lymphoid cells (ILC2s). (4) Conclusions: This study demonstrates one critical cellular function of colonic tuft cells, which facilitates type-2 immune responses by communicating with ILC2s via the L1CAM-integrins interaction. This communication promotes pro-inflammatory signaling pathways in ILC2, leading to the increased secretion of inflammatory cytokines.
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Affiliation(s)
- Guanying (Bianca) Xu
- Department of Food Science and Human Nutrition, College of Agricultural, Consumer, and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; (G.X.); (Y.-X.P.)
| | - Yuan-Xiang Pan
- Department of Food Science and Human Nutrition, College of Agricultural, Consumer, and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; (G.X.); (Y.-X.P.)
- Division of Nutritional Sciences, College of Agricultural, Consumer, and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Wenyan Mei
- Division of Nutritional Sciences, College of Agricultural, Consumer, and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Comparative Biosciences, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Hong Chen
- Department of Food Science and Human Nutrition, College of Agricultural, Consumer, and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; (G.X.); (Y.-X.P.)
- Division of Nutritional Sciences, College of Agricultural, Consumer, and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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9
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Thio CLP, Chang YJ. The modulation of pulmonary group 2 innate lymphoid cell function in asthma: from inflammatory mediators to environmental and metabolic factors. Exp Mol Med 2023; 55:1872-1884. [PMID: 37696890 PMCID: PMC10545775 DOI: 10.1038/s12276-023-01021-0] [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: 12/30/2022] [Revised: 03/21/2023] [Accepted: 03/29/2023] [Indexed: 09/13/2023] Open
Abstract
A dysregulated type 2 immune response is one of the fundamental causes of allergic asthma. Although Th2 cells are undoubtedly central to the pathogenesis of allergic asthma, the discovery of group 2 innate lymphoid cells (ILC2s) has added another layer of complexity to the etiology of this chronic disease. Through their inherent innate type 2 responses, ILC2s not only contribute to the initiation of airway inflammation but also orchestrate the recruitment and activation of other members of innate and adaptive immunity, further amplifying the inflammatory response. Moreover, ILC2s exhibit substantial cytokine plasticity, as evidenced by their ability to produce type 1- or type 17-associated cytokines under appropriate conditions, underscoring their potential contribution to nonallergic, neutrophilic asthma. Thus, understanding the mechanisms of ILC2 functions is pertinent. In this review, we present an overview of the current knowledge on ILC2s in asthma and the regulatory factors that modulate lung ILC2 functions in various experimental mouse models of asthma and in humans.
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Affiliation(s)
| | - Ya-Jen Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei City, 115, Taiwan.
- Institute of Translational Medicine and New Drug Development, China Medical University, Taichung City, 404, Taiwan.
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10
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Murakami M, Sato H, Taketomi Y. Modulation of immunity by the secreted phospholipase A 2 family. Immunol Rev 2023; 317:42-70. [PMID: 37035998 DOI: 10.1111/imr.13205] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/23/2023] [Accepted: 03/28/2023] [Indexed: 04/11/2023]
Abstract
Among the phospholipase A2 (PLA2 ) superfamily, which typically catalyzes the sn-2 hydrolysis of phospholipids to yield fatty acids and lysophospholipids, the secreted PLA2 (sPLA2 ) family contains 11 isoforms in mammals. Individual sPLA2 s have unique enzymatic specificity toward fatty acids and polar heads of phospholipid substrates and display distinct tissue/cellular distributions, suggesting their distinct physiological functions. Recent studies using knockout and/or transgenic mice for a full set of sPLA2 s have revealed their roles in modulation of immunity and related disorders. Application of mass spectrometric lipidomics to these mice has enabled to identify target substrates and products of individual sPLA2 s in given tissue microenvironments. sPLA2 s hydrolyze not only phospholipids in the plasma membrane of activated, damaged or dying mammalian cells, but also extracellular phospholipids such as those in extracellular vesicles, microbe membranes, lipoproteins, surfactants, and dietary phospholipids, thereby exacerbating or ameliorating various diseases. The actions of sPLA2 s are dependent on, or independent of, the generation of fatty acid- or lysophospholipid-derived lipid mediators according to the pathophysiological contexts. In this review, we make an overview of our current understanding of the roles of individual sPLA2 s in various immune responses and associated diseases.
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Affiliation(s)
- Makoto Murakami
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- AMED-CREST, Japan Agency for Medical Research and Development, Tokyo, Japan
| | - Hiroyasu Sato
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshitaka Taketomi
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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11
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LeSuer WE, Kienzl M, Ochkur SI, Schicho R, Doyle AD, Wright BL, Rank MA, Krupnick AS, Kita H, Jacobsen EA. Eosinophils promote effector functions of lung group 2 innate lymphoid cells in allergic airway inflammation in mice. J Allergy Clin Immunol 2023; 152:469-485.e10. [PMID: 37028525 PMCID: PMC10503660 DOI: 10.1016/j.jaci.2023.03.023] [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: 10/12/2022] [Revised: 03/22/2023] [Accepted: 03/29/2023] [Indexed: 04/08/2023]
Abstract
BACKGROUND Group 2 innate lymphoid cells (ILC2s) are critical mediators of type 2 respiratory inflammation, releasing IL-5 and IL-13 and promoting the pulmonary eosinophilia associated with allergen provocation. Although ILC2s have been shown to promote eosinophil activities, the role of eosinophils in group 2 innate lymphoid cell (ILC2) responses is less well defined. OBJECTIVE We sought to investigate the role of eosinophils in activation of ILC2s in models of allergic asthma and in vitro. METHODS Inducible eosinophil-deficient mice were exposed to allergic respiratory inflammation models of asthma, such as ovalbumin or house dust mite challenge, or to innate models of type 2 airway inflammation, such as inhalation of IL-33. Eosinophil-specific IL-4/13-deficient mice were used to address the specific roles for eosinophil-derived cytokines. Direct cell interactions between ILC2s and eosinophils were assessed by in vitro culture experiments. RESULTS Targeted depletion of eosinophils resulted in significant reductions of total and IL-5+ and IL-13+ lung ILC2s in all models of respiratory inflammation. This correlated with reductions in IL-13 levels and mucus in the airway. Eosinophil-derived IL-4/13 was necessary for both eosinophil and ILC2 accumulation in lung in allergen models. In vitro, eosinophils released soluble mediators that induced ILC2 proliferation and G protein-coupled receptor-dependent chemotaxis of ILC2s. Coculture of ILC2s and IL-33-activated eosinophils resulted in transcriptome changes in both ILC2s and eosinophils, suggesting potential novel reciprocal interactions. CONCLUSION These studies demonstrate that eosinophils play a reciprocal role in ILC2 effector functions as part of both adaptive and innate type 2 pulmonary inflammatory events.
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Affiliation(s)
- William E LeSuer
- Division of Allergy, Asthma, and Clinical Immunology, Mayo Clinic Arizona, Scottsdale, Ariz
| | - Melanie Kienzl
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Sergei I Ochkur
- Division of Allergy, Asthma, and Clinical Immunology, Mayo Clinic Arizona, Scottsdale, Ariz
| | - Rudolf Schicho
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Alfred D Doyle
- Division of Allergy, Asthma, and Clinical Immunology, Mayo Clinic Arizona, Scottsdale, Ariz
| | - Benjamin L Wright
- Division of Allergy, Asthma, and Clinical Immunology, Mayo Clinic Arizona, Scottsdale, Ariz; Division of Pulmonology, Phoenix Children's Hospital, Phoenix, Ariz
| | - Matthew A Rank
- Division of Allergy, Asthma, and Clinical Immunology, Mayo Clinic Arizona, Scottsdale, Ariz; Division of Pulmonology, Phoenix Children's Hospital, Phoenix, Ariz
| | | | - Hirohito Kita
- Division of Allergy, Asthma, and Clinical Immunology, Mayo Clinic Arizona, Scottsdale, Ariz; Department of Immunology, Mayo Clinic Arizona, Scottsdale, Ariz
| | - Elizabeth A Jacobsen
- Division of Allergy, Asthma, and Clinical Immunology, Mayo Clinic Arizona, Scottsdale, Ariz; Department of Immunology, Mayo Clinic Arizona, Scottsdale, Ariz.
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12
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Holgado A, Liu Z, Aidarova A, Mueller C, Haegman M, Driege Y, Kreike M, Scott CL, Afonina IS, Beyaert R. A20 is a master switch of IL-33 signaling in macrophages and determines IL-33-induced lung immunity. J Allergy Clin Immunol 2023; 152:244-256.e4. [PMID: 36898482 DOI: 10.1016/j.jaci.2023.02.026] [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: 03/02/2022] [Revised: 01/17/2023] [Accepted: 02/06/2023] [Indexed: 03/11/2023]
Abstract
BACKGROUND IL-33 plays a major role in the pathogenesis of allergic diseases such as asthma and atopic dermatitis. On its release from lung epithelial cells, IL-33 primarily drives type 2 immune responses, accompanied by eosinophilia and robust production of IL-4, IL-5, and IL-13. However, several studies show that IL-33 can also drive a type 1 immune response. OBJECTIVE We sought to determine the role of A20 in the regulation of IL-33 signaling in macrophages and IL-33-induced lung immunity. METHODS We studied the immunologic response in lungs of IL-33-treated mice that specifically lack A20 in myeloid cells. We also analyzed IL-33 signaling in A20-deficient bone marrow-derived macrophages. RESULTS IL-33-induced lung innate lymphoid cell type 2 expansion, type 2 cytokine production, and eosinophilia were drastically reduced in the absence of macrophage A20 expression, whereas neutrophils and interstitial macrophages in lungs were increased. In vitro, IL-33-mediated nuclear factor kappa B activation was only weakly affected in A20-deficient macrophages. However, in the absence of A20, IL-33 gained the ability to activate signal transducer and activator of transcription 1 (STAT1) signaling and STAT1-dependent gene expression. Surprisingly, A20-deficient macrophages produced IFN-γ in response to IL-33, which was fully STAT1-dependent. Furthermore, STAT1 deficiency partially restored the ability of IL-33 to induce ILC2 expansion and eosinophilia in myeloid cell-specific A20 knockout mice. CONCLUSIONS We reveal a novel role for A20 as a negative regulator of IL-33-induced STAT1 signaling and IFN-γ production in macrophages, which determines lung immune responses.
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Affiliation(s)
- Aurora Holgado
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Zhuangzhuang Liu
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Laboratory of Myeloid Cell Biology in Tissue Damage and Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Aigerim Aidarova
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Christina Mueller
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Mira Haegman
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Yasmine Driege
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Marja Kreike
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Charlotte L Scott
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium; Laboratory of Myeloid Cell Biology in Tissue Damage and Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium
| | - Inna S Afonina
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Rudi Beyaert
- Unit of Molecular Signal Transduction in Inflammation, VIB-UGent Center for Inflammation Research, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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13
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Huang X, Gou W, Song Q, Huang Y, Wen C, Bo X, Jiang X, Feng J, Gao H. A BRAF mutation-associated gene risk model for predicting the prognosis of melanoma. Heliyon 2023; 9:e15939. [PMID: 37205993 PMCID: PMC10189240 DOI: 10.1016/j.heliyon.2023.e15939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 04/25/2023] [Accepted: 04/27/2023] [Indexed: 05/21/2023] Open
Abstract
BRAF mutation plays an important role in the pathogenesis and progression of melanoma and is correlated to the prognosis of melanoma patients. However, fewer studies have attempted to develop a BRAF mutation-associated gene risk model for predicting the prognosis of melanoma. The current research explores BRAF mutation-related biological features in melanoma and establishes a prognostic signature. First, we identified three significantly enriched KEGG pathways (glycosphingolipid biosynthesis - ganglio series, ether lipid metabolism, and glycosaminoglycan biosynthesis - keratan sulfate) and corresponding genes in the BRAF mutant group by gene set enrichment analysis. We then developed a prognostic signature based on 7 BRAF-associated genes (PLA2G2D, FUT8, PLA2G4E, PLA2G5, PLA2G1B, B3GNT2, and ST3GAL5) and assessed its prediction accuracy using ROC curve analysis. Finally, the nomogram was established according to the prognostic signature and independent clinical characteristics to predict the survival of melanoma patients. Furthermore, we found higher proportions of naive B cells, plasma cells, CD8 T cells, CD4 memory-activated T cells, and regulatory T cells in the low-risk group. Whereas lower proportions of M0, M1, and M2 macrophages and resting NK cells were observed in the high-risk group. The analysis also showed a significantly higher expression of immune checkpoint molecules (PD-1, PD-L1, CTLA4, BTLA, CD28, CD80, CD86, HAVCR2, ICOS, LAG3, and TIGIT) in the low-risk group. Our results provide novel insights into the effect of BRAF mutation on melanoma growth and indicate a promising direction toward immunotherapy and precision medicine in melanoma patients.
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Affiliation(s)
- Xiang Huang
- Department of Anesthesiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, Guizhou, China
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Wanrong Gou
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Qinxian Song
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Yan Huang
- Department of Dermatology, Suining First People's Hospital, Suining, 629000, Sichuan, China
| | - Chunlei Wen
- Department of Anesthesiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, Guizhou, China
| | - Xue Bo
- Department of Anesthesiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, Guizhou, China
| | - Xian Jiang
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Jianguo Feng
- Anesthesiology and Critical Care Medicine Key Laboratory of Luzhou, Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
- Corresponding author.
| | - Hong Gao
- Department of Anesthesiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, Guizhou, China
- Corresponding author.
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Crosstalk between macrophages and innate lymphoid cells (ILCs) in diseases. Int Immunopharmacol 2022; 110:108937. [PMID: 35779490 DOI: 10.1016/j.intimp.2022.108937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/01/2022] [Accepted: 06/07/2022] [Indexed: 12/15/2022]
Abstract
Innate lymphoid cells (ILCs) and macrophages are tissue-resident cells that play important roles in tissue-immune homeostasis and immune regulation. ILCs are mainly distributed on the barrier surfaces of mammals to ensure immunity or tissue homeostasis following host, microbial, or environmental stimulation. Their complex relationships with different organs enable them to respond quickly to disturbances in environmental conditions and organ homeostasis, such as during infections and tissue damage. Gradually emerging evidence suggests that ILCs also play complex and diverse roles in macrophage development, homeostasis, polarization, inflammation, and viral infection. In turn, macrophages also determine the fate of ILCs to some extent, which indicates that network crossover between these interactions is a key determinant of the immune response. More work is needed to better define the crosstalk of ILCs with macrophages in different tissues and demonstrate how it is affected during inflammation and other diseases. Here, we summarize current research on the functional interactions between ILCs and macrophages and consider the potential therapeutic utility of these interactions for the benefit of human health.
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15
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Taketomi Y, Murakami M. Regulatory Roles of Phospholipase A2 Enzymes and Bioactive Lipids in Mast Cell Biology. Front Immunol 2022; 13:923265. [PMID: 35833146 PMCID: PMC9271868 DOI: 10.3389/fimmu.2022.923265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 05/30/2022] [Indexed: 11/26/2022] Open
Abstract
Lipids play fundamental roles in life as an essential component of cell membranes, as a major source of energy, as a body surface barrier, and as signaling molecules that transmit intracellular and intercellular signals. Lipid mediators, a group of bioactive lipids that mediates intercellular signals, are produced via specific biosynthetic enzymes and transmit signals via specific receptors. Mast cells, a tissue-resident immune cell population, produce several lipid mediators that contribute to exacerbation or amelioration of allergic responses and also non-allergic inflammation, host defense, cancer and fibrosis by controlling the functions of microenvironmental cells as well as mast cell themselves in paracrine and autocrine fashions. Additionally, several bioactive lipids produced by stromal cells regulate the differentiation, maturation and activation of neighboring mast cells. Many of the bioactive lipids are stored in membrane phospholipids as precursor forms and released spatiotemporally by phospholipase A2 (PLA2) enzymes. Through a series of studies employing gene targeting and lipidomics, several enzymes belonging to the PLA2 superfamily have been demonstrated to participate in mast cell-related diseases by mobilizing unique bioactive lipids in multiple ways. In this review, we provide an overview of our current understanding of the regulatory roles of several PLA2-driven lipid pathways in mast cell biology.
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16
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Geng QS, Liu RJ, Shen ZB, Wei Q, Zheng YY, Jia LQ, Wang LH, Li LF, Li J, Xue WH. Transcriptome sequencing and metabolome analysis reveal the mechanism of Shuanghua Baihe Tablet in the treatment of oral mucositis. Chin J Nat Med 2021; 19:930-943. [PMID: 34961591 DOI: 10.1016/s1875-5364(22)60150-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Indexed: 12/22/2022]
Abstract
Oral mucositis (OM) caused by cancer therapy is the most common adverse reaction in the radiotherapy of head and neck tumors. In severe cases, it can lead to the interruption of treatment, which affects the control of the disease and the quality of life. Shuanghua Baihe Tablet (SBT) is a traditional Chinese medicine (TCM) formula, which is administerd to treat OM in China. It has been clinically effective for more than 30 years, but the underlying mechanism is not completely understood. With the development of multiple omics, it is possible to explore the mechanism of Chinese herbal compound prescriptions. Based on transcriptomics and metabolomics, we explored the underlying mechanism of SBT in the treatment of OM. An OM model of rats was established by 5-FU induction, and SBT was orally administered at dosages of 0.75 and 3 g·kg-1·d-1. In order to search for SBT targets and related metabolites, the dysregulated genes and metabolites were detected by transcriptomics and metabolomics. Immune related indicators such as interleukin-17 (IL-17) and tumor necrosis factor-α (TNF-α) were detected by ELISA. Treg cell disorders was analyzed by flow cytometry. Our results showed that SBT significantly alleviated the symptoms of OM rats and the inflammatory infiltration of ulcer tissues. After SBT administration, inflammatory related metabolic pathways including linoleic acid metabolism, valine, leucine and isoleucine biosynthesis were significantly altered. Furthermore, the production of proinflammatory factors like IL-17 and TNF-α, were also dramatically reduced after SBT administration. Besides, the infiltration degree of Treg cells in the spleen of OM modeling rats was significantly improved by SBT administration, thus maintaining the immune balance of the body. The current study demonstrates that SBT regulates inoleic acid metabolism, glycerophospholipid metabolism and amino acid metabolism, and inhibits IL-17/TNF signal transduction to restore Treg and Th17 cell homeostasis in OM rats, thereby alleviating chemotherapy-induced OM.
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Affiliation(s)
- Qi-Shun Geng
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Rui-Juan Liu
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Zhi-Bo Shen
- Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Qian Wei
- Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Yuan-Yuan Zheng
- Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Lan-Qi Jia
- Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Long-Hao Wang
- Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Li-Feng Li
- Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Jun Li
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
| | - Wen-Hua Xue
- Engineering Laboratory for Digital Telemedicine Service, The first Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
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Macrophage-Mediated Immune Responses: From Fatty Acids to Oxylipins. MOLECULES (BASEL, SWITZERLAND) 2021; 27:molecules27010152. [PMID: 35011385 PMCID: PMC8746402 DOI: 10.3390/molecules27010152] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/22/2021] [Accepted: 12/23/2021] [Indexed: 01/21/2023]
Abstract
Macrophages have diverse functions in the pathogenesis, resolution, and repair of inflammatory processes. Elegant studies have elucidated the metabolomic and transcriptomic profiles of activated macrophages. However, the versatility of macrophage responses in inflammation is likely due, at least in part, to their ability to rearrange their repertoire of bioactive lipids, including fatty acids and oxylipins. This review will describe the fatty acids and oxylipins generated by macrophages and their role in type 1 and type 2 immune responses. We will highlight lipidomic studies that have shaped the current understanding of the role of lipids in macrophage polarization.
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18
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Olguín-Martínez E, Ruiz-Medina BE, Licona-Limón P. Tissue-Specific Molecular Markers and Heterogeneity in Type 2 Innate Lymphoid Cells. Front Immunol 2021; 12:757967. [PMID: 34759931 PMCID: PMC8573327 DOI: 10.3389/fimmu.2021.757967] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 09/21/2021] [Indexed: 12/25/2022] Open
Abstract
Innate lymphoid cells (ILCs) are the most recently described group of lymphoid subpopulations. These tissue-resident cells display a heterogeneity resembling that observed on different groups of T cells, hence their categorization as cytotoxic NK cells and helper ILCs type 1, 2 and 3. Each one of these groups is highly diverse and expresses different markers in a context-dependent manner. Type 2 innate lymphoid cells (ILC2s) are activated in response to helminth parasites and regulate the immune response. They are involved in the etiology of diseases associated with allergic responses as well as in the maintenance of tissue homeostasis. Markers associated with their identification differ depending on the tissue and model used, making the study and understanding of these cells a cumbersome task. This review compiles evidence for the heterogeneity of ILC2s as well as discussion and analyses of molecular markers associated with their identity, function, tissue-dependent expression, and how these markers contribute to the interaction of ILC2s with specific microenvironments to maintain homeostasis or respond to pathogenic challenges.
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Affiliation(s)
- Enrique Olguín-Martínez
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, Mexico
| | - Blanca E Ruiz-Medina
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, Mexico
| | - Paula Licona-Limón
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, México City, Mexico
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19
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Zheng H, Zhang Y, Pan J, Liu N, Qin Y, Qiu L, Liu M, Wang T. The Role of Type 2 Innate Lymphoid Cells in Allergic Diseases. Front Immunol 2021; 12:586078. [PMID: 34177881 PMCID: PMC8220221 DOI: 10.3389/fimmu.2021.586078] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 05/10/2021] [Indexed: 12/22/2022] Open
Abstract
Allergic diseases are significant diseases that affect many patients worldwide. In the past few decades, the incidence of allergic diseases has increased significantly due to environmental changes and social development, which has posed a substantial public health burden and even led to premature death. The understanding of the mechanism underlying allergic diseases has been substantially advanced, and the occurrence of allergic diseases and changes in the immune system state are known to be correlated. With the identification and in-depth understanding of innate lymphoid cells, researchers have gradually revealed that type 2 innate lymphoid cells (ILC2s) play important roles in many allergic diseases. However, our current studies of ILC2s are limited, and their status in allergic diseases remains unclear. This article provides an overview of the common phenotypes and activation pathways of ILC2s in different allergic diseases as well as potential research directions to improve the understanding of their roles in different allergic diseases and ultimately find new treatments for these diseases.
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Affiliation(s)
- Haocheng Zheng
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Yi Zhang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Jiachuang Pan
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Nannan Liu
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Yu Qin
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Linghui Qiu
- Journal Press of Global Traditional Chinese Medicine, Beijing, China
| | - Min Liu
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Tieshan Wang
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
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20
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Rodriguez-Rodriguez N, Gogoi M, McKenzie AN. Group 2 Innate Lymphoid Cells: Team Players in Regulating Asthma. Annu Rev Immunol 2021; 39:167-198. [PMID: 33534604 PMCID: PMC7614118 DOI: 10.1146/annurev-immunol-110119-091711] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Type 2 immunity helps protect the host from infection, but it also plays key roles in tissue homeostasis, metabolism, and repair. Unfortunately, inappropriate type 2 immune reactions may lead to allergy and asthma. Group 2 innate lymphoid cells (ILC2s) in the lungs respond rapidly to local environmental cues, such as the release of epithelium-derived type 2 initiator cytokines/alarmins, producing type 2 effector cytokines such as IL-4, IL-5, and IL-13 in response to tissue damage and infection. ILC2s are associated with the severity of allergic asthma, and experimental models of lung inflammation have shown how they act as playmakers, receiving signals variously from stromal and immune cells as well as the nervous system and then distributing cytokine cues to elicit type 2 immune effector functions and potentiate CD4+ T helper cell activation, both of which characterize the pathology of allergic asthma. Recent breakthroughs identifying stromal- and neuronal-derived microenvironmental cues that regulate ILC2s, along with studies recognizing the potential plasticity of ILC2s, have improved our understanding of the immunoregulation of asthma and opened new avenues for drug discovery.
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Affiliation(s)
- Noe Rodriguez-Rodriguez
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, Cambridgeshire, CB2 0QH. UK
| | - Mayuri Gogoi
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, Cambridgeshire, CB2 0QH. UK
| | - Andrew N.J. McKenzie
- Medical Research Council, Laboratory of Molecular Biology, Cambridge, Cambridgeshire, CB2 0QH. UK,Corresponding author:
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21
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Knuplez E, Sturm EM, Marsche G. Emerging Role of Phospholipase-Derived Cleavage Products in Regulating Eosinophil Activity: Focus on Lysophospholipids, Polyunsaturated Fatty Acids and Eicosanoids. Int J Mol Sci 2021; 22:4356. [PMID: 33919453 PMCID: PMC8122506 DOI: 10.3390/ijms22094356] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 12/19/2022] Open
Abstract
Eosinophils are important effector cells involved in allergic inflammation. When stimulated, eosinophils release a variety of mediators initiating, propagating, and maintaining local inflammation. Both, the activity and concentration of secreted and cytosolic phospholipases (PLAs) are increased in allergic inflammation, promoting the cleavage of phospholipids and thus the production of reactive lipid mediators. Eosinophils express high levels of secreted phospholipase A2 compared to other leukocytes, indicating their direct involvement in the production of lipid mediators during allergic inflammation. On the other side, eosinophils have also been recognized as crucial mediators with regulatory and homeostatic roles in local immunity and repair. Thus, targeting the complex network of lipid mediators offer a unique opportunity to target the over-activation and 'pro-inflammatory' phenotype of eosinophils without compromising the survival and functions of tissue-resident and homeostatic eosinophils. Here we provide a comprehensive overview of the critical role of phospholipase-derived lipid mediators in modulating eosinophil activity in health and disease. We focus on lysophospholipids, polyunsaturated fatty acids, and eicosanoids with exciting new perspectives for future drug development.
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Affiliation(s)
| | | | - Gunther Marsche
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, 8010 Graz, Austria; (E.K.); (E.M.S.)
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22
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Mi LL, Zhu Y, Lu HY. A crosstalk between type 2 innate lymphoid cells and alternative macrophages in lung development and lung diseases (Review). Mol Med Rep 2021; 23:403. [PMID: 33786611 PMCID: PMC8025469 DOI: 10.3892/mmr.2021.12042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 03/08/2021] [Indexed: 12/14/2022] Open
Abstract
Type 2 innate lymphoid cells (ILC2s) are important innate immune cells that are involved in type 2 inflammation, in both mice and humans. ILC2s are stimulated by factors, including interleukin (IL)-33 and IL-25, and activated ILC2s secrete several cytokines that mediate type 2 immunity by inducing profound changes in physiology, including activation of alternative (M2) macrophages. M2 macrophages possess immune modulatory, phagocytic, tissue repair and remodeling properties, and can regulate ILC2s under infection. The present review summarizes the role of ILC2s as innate cells and M2 macrophages as anti-inflammatory cells, and discusses current literature on their important biological significance. The present review also highlights how the crosstalk between ILC2s and M2 macrophages contributes to lung development, induces pulmonary parasitic expulsion, exacerbates pulmonary viral and fungal infections and allergic airway diseases, and promotes the development of lung diseases, such as pulmonary fibrosis, chronic obstructive pulmonary disease and carcinoma of the lungs.
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Affiliation(s)
- Lan-Lan Mi
- Department of Pediatrics, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
| | - Yue Zhu
- Department of Pediatrics, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
| | - Hong-Yan Lu
- Department of Pediatrics, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
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23
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Fujioka D, Watanabe Y, Nakamura T, Yokoyama T, Miyazawa K, Murakami M, Kugiyama K. Group V Secretory Phospholipase A 2 Regulates Endocytosis of Acetylated LDL by Transcriptional Activation of PGK1 in RAW264.7 Macrophage Cell Line. J Atheroscler Thromb 2021; 29:692-718. [PMID: 33775979 PMCID: PMC9135649 DOI: 10.5551/jat.62216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIMS It was suggested that group V secretory phospholipase A2 (sPLA2-V) existed in the nucleus. This study examined whether nuclear sPLA2-V plays a role in endocytosis of acetylated low-density lipoprotein (AcLDL) in monocyte/macrophage-like cell line RAW264.7 cells. METHODS RAW264.7 cells were transfected with shRNA vector targeting sPLA2-V (sPLA2-V-knockdown [KD] cells) or empty vector (sPLA2-V-wild-type [WT] cells). AcLDL endocytosis was assessed by incubation with 125I-AcLDL or AcLDL conjugated with pHrodo. Actin polymerization was assessed by flow cytometry using Alexa Fluor 546-phalloidin. RESULTS In immunofluorescence microscopic studies, sPLA2-V was detected in the nucleus. ChIP-Seq and ChIP-qPCR analyses showed binding of sPLA2-V to the promoter region of the phosphoglycerate kinase 1 (Pgk1) gene. In the promoter assay, sPLA2-V-KD cells had lower promoter activity of the Pgk1 gene than sPLA2-V-WT cells, and this decrease could be reversed by transfection with a vector encoding sPLA2-V-H48Q that lacks enzymatic activity. Compared with sPLA2-V-WT cells, sPLA2-V-KD cells had decreased PGK1 protein expression, beclin 1 (Beclin1) phosphorylation at S30, and class III PI3-kinase activity that could also be restored by transfection with sPLA2-V-H48Q. sPLA2-V-KD cells had impaired actin polymerization and endocytosis, which was reversed by introduction of sPLA2-V-H48Q or PGK1 overexpression. In sPLA2-V-WT cells, siRNA-mediated depletion of PGK1 suppressed Beclin1 phosphorylation and impaired actin polymerization and intracellular trafficking of pHrodo-conjugated AcLDL. CONCLUSIONS Nuclear sPLA2-V binds to the Pgk1 gene promoter region and increases its transcriptional activity. sPLA2-V regulates AcLDL endocytosis through PGK1-Beclin1 in a manner that is independent of its enzymatic activity in RAW264.7 cells.
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Affiliation(s)
- Daisuke Fujioka
- Department of Internal Medicine II, University of Yamanashi, Faculty of Medicine
| | - Yosuke Watanabe
- Department of Internal Medicine II, University of Yamanashi, Faculty of Medicine
| | - Takamitsu Nakamura
- Department of Internal Medicine II, University of Yamanashi, Faculty of Medicine
| | - Takashi Yokoyama
- Department of Biochemistry, University of Yamanashi, Faculty of Medicine
| | - Keiji Miyazawa
- Department of Biochemistry, University of Yamanashi, Faculty of Medicine
| | - Makoto Murakami
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, University of Tokyo.,AMED-CREST, Japan Agency for Medical Research and Development
| | - Kiyotaka Kugiyama
- Department of Internal Medicine II, University of Yamanashi, Faculty of Medicine.,AMED-CREST, Japan Agency for Medical Research and Development
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24
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Inhibition of miR-99a-5p prevents allergen-driven airway exacerbations without compromising type-2 memory responses in the intestine following helminth infection. Mucosal Immunol 2021; 14:912-922. [PMID: 33846533 PMCID: PMC8222002 DOI: 10.1038/s41385-021-00401-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 02/16/2021] [Accepted: 03/14/2021] [Indexed: 02/04/2023]
Abstract
Acute exacerbations (AE) of asthma, remain one of the biggest concerns for patients living with asthma. As such, identifying the causes, the molecular mechanisms involved and new therapeutic interventions to prevent AE is a high priority. Immunity to intestinal helminths involves the reactivation of type-2 immune responses leading to smooth muscle contraction and mucus hypersecretion-physiological processes very similar to acute exacerbations in the airways following allergen exposure. In this study, we employed a murine model of intestinal helminth infection, using Heligmosomoides polygyrus, to identify miRNAs during active expulsion, as a system for the identification of miRNAs that may contribute to AE in the airways. Concomitant with type-2 immunity and expulsion of H. polygyrus, we identified miR-99a-5p, miR-148a-3p and miR-155-5p that were differentially regulated. Systemic inhibition of these miRNAs, alone or in combination, had minimal impact on expulsion of H. polygyrus, but inhibition of miR-99a-5p or miR-155-5p significantly reduced house dust mite (HDM)-driven acute inflammation, modelling human acute exacerbations. Immunological, pathological and transcriptional analysis identified that miR-155-5p or miR-99a-5p contribute significantly to HDM-driven AE and that transient inhibition of these miRNAs may provide relief from allergen-driven AE, without compromising anti-helminth immunity in the gut.
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25
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Koganesawa M, Yamaguchi M, Samuchiwal SK, Balestrieri B. Lipid Profile of Activated Macrophages and Contribution of Group V Phospholipase A 2. Biomolecules 2020; 11:biom11010025. [PMID: 33383652 PMCID: PMC7823364 DOI: 10.3390/biom11010025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 12/17/2022] Open
Abstract
Macrophages activated by Interleukin (IL)-4 (M2) or LPS+ Interferon (IFN)γ (M1) perform specific functions respectively in type 2 inflammation and killing of pathogens. Group V phospholipase A2 (Pla2g5) is required for the development and functions of IL-4-activated macrophages and phagocytosis of pathogens. Pla2g5-generated bioactive lipids, including lysophospholipids (LysoPLs), fatty acids (FAs), and eicosanoids, have a role in many diseases. However, little is known about their production by differentially activated macrophages. We performed an unbiased mass-spectrometry analysis of phospholipids (PLs), LysoPLs, FAs, and eicosanoids produced by Wild Type (WT) and Pla2g5-null IL-4-activated bone marrow-derived macrophages (IL-4)BM-Macs (M2) and (LPS+IFNγ)BM-Macs (M1). Phosphatidylcholine (PC) was preferentially metabolized in (LPS+IFNγ)BM-Macs and Phosphatidylethanolamine (PE) in (IL-4)BM-Macs, with Pla2g5 contributing mostly to metabolization of selected PE molecules. While Pla2g5 produced palmitic acid (PA) in (LPS+IFNγ)BM-Macs, the absence of Pla2g5 increased myristic acid (MA) in (IL-4)BM-Macs. Among eicosanoids, Prostaglandin E2 (PGE2) and prostaglandin D2 (PGD2) were significantly reduced in (IL-4)BM-Macs and (LPS+IFNγ)BM-Macs lacking Pla2g5. Instead, the IL-4-induced increase in 20-carboxy arachidonic acid (20CooH AA) was dependent on Pla2g5, as was the production of 12-hydroxy-heptadecatrienoic acid (12-HHTrE) in (LPS+IFNγ)BM-Macs. Thus, Pla2g5 contributes to PE metabolization, PGE2 and PGD2 production independently of the type of activation, while in (IL-4)BM-Macs, Pla2g5 regulates selective lipid pathways and likely novel functions.
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26
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Murphy RC, Altemeier WA, Lai Y, Hallstrand TS. The Intricate Web of Phospholipase A 2s and Specific Features of Airway Hyperresponsiveness in Asthma. Am J Respir Cell Mol Biol 2020; 63:543-545. [PMID: 32484733 DOI: 10.1165/rcmb.2020-0131le] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
| | | | - Ying Lai
- University of Washington, Seattle, Washington
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27
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Murakami M, Sato H, Taketomi Y. Updating Phospholipase A 2 Biology. Biomolecules 2020; 10:E1457. [PMID: 33086624 PMCID: PMC7603386 DOI: 10.3390/biom10101457] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/09/2020] [Accepted: 10/15/2020] [Indexed: 12/30/2022] Open
Abstract
The phospholipase A2 (PLA2) superfamily contains more than 50 enzymes in mammals that are subdivided into several distinct families on a structural and biochemical basis. In principle, PLA2 has the capacity to hydrolyze the sn-2 position of glycerophospholipids to release fatty acids and lysophospholipids, yet several enzymes in this superfamily catalyze other reactions rather than or in addition to the PLA2 reaction. PLA2 enzymes play crucial roles in not only the production of lipid mediators, but also membrane remodeling, bioenergetics, and body surface barrier, thereby participating in a number of biological events. Accordingly, disturbance of PLA2-regulated lipid metabolism is often associated with various diseases. This review updates the current state of understanding of the classification, enzymatic properties, and biological functions of various enzymes belonging to the PLA2 superfamily, focusing particularly on the novel roles of PLA2s in vivo.
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Affiliation(s)
- Makoto Murakami
- Laboratory of Microenvironmental and Metabolic Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113-8655, Japan; (H.S.); (Y.T.)
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28
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Feng Y, Huang J, Qu C, Huang M, Chen Z, Tang D, Xu Z, Wang B, Chen Z. Future perspective: high-throughput construction of new ultrasensitive cytokine and virion liquid chips for high-throughput screening (HTS) of anti-inflammatory drugs or clinical diagnosis and treatment of inflammatory diseases. Anal Bioanal Chem 2020; 412:7685-7699. [PMID: 32870351 PMCID: PMC7459963 DOI: 10.1007/s00216-020-02894-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 07/31/2020] [Accepted: 08/18/2020] [Indexed: 01/01/2023]
Abstract
Pathogen-host cell interactions play an important role in many human infectious and inflammatory diseases. Several pathogens, including Escherichia coli (E. coli), Mycobacterium tuberculosis (M. tb), and even the recent 2019 novel coronavirus (2019-nCoV), can cause serious breathing and brain disorders, tissue injury and inflammation, leading to high rates of mortality and resulting in great loss to human physical and mental health as well as the global economy. These infectious diseases exploit the microbial and host factors to induce serious inflammatory and immunological symptoms. Thus the development of anti-inflammatory drugs targeting bacterial/viral infection is an urgent need. In previous studies, YojI-IFNAR2, YojI-IL10RA, YojI-NRP1,YojI-SIGLEC7, and YojI-MC4R membrane-protein interactions were found to mediate E. coli invasion of the blood-brain barrier (BBB), which activated the downstream anti-inflammatory proteins NACHT, LRR and PYD domains-containing protein 2(NLRP2), using a proteomic chip conjugated with cell immunofluorescence labeling. However, the studies of pathogen (bacteria/virus)-host cell interactions mediated by membrane protein interactions did not extend their principles to broad biomedical applications such as 2019-nCoV infectious disease therapy. The first part of this feature article presents in-depth analysis of the cross-talk of cellular anti-inflammatory transduction signaling among interferon membrane protein receptor II (IFNAR2), interleukin-10 receptor subunit alpha (IL-10RA), NLRP2 and [Ca2+]-dependent phospholipase A2 (PLA2G5), based on experimental results and important published studies, which lays a theoretical foundation for the high-throughput construction of the cytokine and virion solution chip. The paper then moves on to the construction of the novel GPCR recombinant herpes virion chip and virion nano-oscillators for profiling membrane protein functions, which drove the idea of constructing the new recombinant virion and cytokine liquid chips for HTS of leading drugs. Due to the different structural properties of GPCR, IFNAR2, ACE2 and Spike of 2019-nCoV, their ligands will either bind the extracellular domain of IFNAR2/ACE2/Spike or the specific loops of the GPCR on the envelope of the recombinant herpes virions to induce dynamic charge distribution changes that lead to the variable electron transition for detection. Taken together, the combined overview of two of the most innovative and exciting developments in the immunoinflammatory field provides new insight into high-throughput construction of ultrasensitive cytokine and virion liquid chips for HTS of anti-inflammatory drugs or clinical diagnosis and treatment of inflammatory diseases including infectious diseases, acute or chronic inflammation (acute gouty arthritis or rheumatoid arthritis), cardiovascular disease, atheromatosis, diabetes, obesity, tissue injury and tumors. It has significant value in the prevention and treatment of these serious and painful diseases. Graphical abstract.
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Affiliation(s)
- Yingzhu Feng
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China. .,Key Laboratory of Bio-theological Science and Technology of Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400045, China.
| | - Jiuhong Huang
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China
| | - Chuanhua Qu
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China
| | - Mengjun Huang
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China
| | - Zhencong Chen
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China
| | - Dianyong Tang
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China
| | - Zhigang Xu
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China
| | - Bochu Wang
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China. .,Key Laboratory of Bio-theological Science and Technology of Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400045, China.
| | - Zhongzhu Chen
- College of Pharmacy & International Academy of Targeted Therapeutics and Innovation (IATTI), Chongqing University of Art and Sciences, Chongqing, 402160, China.
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29
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Lei A, He Y, Yang Q, Li X, Li R. Role of myeloid cells in the regulation of group 2 innate lymphoid cell-mediated allergic inflammation. Immunology 2020; 161:18-24. [PMID: 32609880 DOI: 10.1111/imm.13232] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/15/2020] [Accepted: 06/20/2020] [Indexed: 12/11/2022] Open
Abstract
Group 2 innate lymphoid cells (ILC2s) are an important component of the innate immune system that execute important effector functions at barrier surfaces, such as lung and skin. Like T helper type 2 cells, ILC2s are able to release high amounts of type 2 cytokines that are essential in inducing allergic inflammation and eliminating helminth infections. The past few years have contributed to our better understanding of the interactions between ILC2s and other cells of the immune system via soluble factors or in a cell-cell contact manner. Myeloid cells, including mononuclear leukocytes and polymorphonuclear leukocytes, are excellent sensors of tissue damage and infection and can influence ILC2 responses in the process of allergic inflammation. In this review, we summarize recent insights on how myeloid cell subsets regulate ILC2 activation with focus on soluble factors in the context of allergic inflammation.
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Affiliation(s)
- Aihua Lei
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Yumei He
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Qiong Yang
- Chronic Disease Laboratory, Institutes for Life Sciences and School of Medicine, South China University of Technology, Guangzhou, China
| | - Xiaofang Li
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
| | - Ranhui Li
- Institute of Pathogenic Biology, Hengyang Medical College, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, China
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30
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Santiago-Fernandez C, Martin-Reyes F, Bautista R, Tome M, Gómez-Maldonado J, Gutierrez-Repiso C, Tinahones FJ, Garcia-Fuentes E, Garrido-Sánchez L. miRNA/Target Gene Profile of Endothelial Cells Treated with Human Triglyceride-Rich Lipoproteins Obtained after a High-Fat Meal with Extra-Virgin Olive Oil or Sunflower Oil. Mol Nutr Food Res 2020; 64:e2000221. [PMID: 32663360 DOI: 10.1002/mnfr.202000221] [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: 03/05/2020] [Revised: 06/16/2020] [Indexed: 02/06/2023]
Abstract
SCOPE The effects of triglyceride-rich lipoproteins (TRLs) on the miRNA expression of endothelial cells, which are very involved in atherosclerosis, according to the type of diet are not known. METHODS AND RESULTS The differences between the effects of TRLs isolated from blood of subjects after a high-fat meal with extra-virgin olive oil (EVOO) and sunflower oil (SO) on the microRNA-Seq profile related to atherosclerosis in human umbilical vein endothelial cells are analyzed. 28 upregulated microRNAs with EVOO-derived TRLs, which can regulate 22 genes related to atherosclerosis, are found. 21 upregulated microRNAs with SO-derived TRLs, which can regulate 20 genes related to atherosclerosis, are found. These microRNAs are mainly involved in angiogenesis, with a predominance of an anti-angiogenic effect with EVOO-derived TRLs. Other microRNAs upregulated with SO-derived TRLs are involved in cardiovascular diseases. Pathways for the target genes obtained from the upregulated microRNA with EVOO-derived TRLs are involved in lipid metabolism and inflammatory and defense response, while those with SO-derived TRLs are involved in lipid metabolic process. CONCLUSION EVOO-derived TRLs seem to produce a more atheroprotective profile than SO-derived TRLs. This study provides alternative mechanisms on the protective role of EVOO against the atherogenic process through microRNA regulation in endothelial cells.
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Affiliation(s)
- Concepción Santiago-Fernandez
- Instituto de Investigación Biomédica de Málaga-IBIMA, 29010, Málaga, Spain.,Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, 29010, Málaga, Spain.,Facultad de Medicina, Universidad de Málaga, 29010, Málaga, Spain
| | - Flores Martin-Reyes
- Instituto de Investigación Biomédica de Málaga-IBIMA, 29010, Málaga, Spain.,Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, 29010, Málaga, Spain.,Facultad de Medicina, Universidad de Málaga, 29010, Málaga, Spain
| | - Rocío Bautista
- Plataforma Andaluza de Bioinformática-SCBI, Universidad de Málaga, 29590, Málaga, Spain
| | - Mónica Tome
- Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Regional Universitario, 29010, Málaga, Spain
| | - Josefa Gómez-Maldonado
- Unidad de Genómica y Ultrasecuenciación-SCBI, Universidad de Málaga, 29590, Málaga, Spain
| | - Carolina Gutierrez-Repiso
- Instituto de Investigación Biomédica de Málaga-IBIMA, 29010, Málaga, Spain.,Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Universitario Virgen de la Victoria, 29010, Málaga, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición-CIBEROBN, Instituto de Salud Carlos III, 29010, Málaga, Spain
| | - Francisco J Tinahones
- Instituto de Investigación Biomédica de Málaga-IBIMA, 29010, Málaga, Spain.,Facultad de Medicina, Universidad de Málaga, 29010, Málaga, Spain.,Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Universitario Virgen de la Victoria, 29010, Málaga, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición-CIBEROBN, Instituto de Salud Carlos III, 29010, Málaga, Spain
| | - Eduardo Garcia-Fuentes
- Instituto de Investigación Biomédica de Málaga-IBIMA, 29010, Málaga, Spain.,Unidad de Gestión Clínica de Aparato Digestivo, Hospital Universitario Virgen de la Victoria, 29010, Málaga, Spain
| | - Lourdes Garrido-Sánchez
- Instituto de Investigación Biomédica de Málaga-IBIMA, 29010, Málaga, Spain.,Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Universitario Virgen de la Victoria, 29010, Málaga, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición-CIBEROBN, Instituto de Salud Carlos III, 29010, Málaga, Spain
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31
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Watanabe K, Taketomi Y, Miki Y, Kugiyama K, Murakami M. Group V secreted phospholipase A 2 plays a protective role against aortic dissection. J Biol Chem 2020; 295:10092-10111. [PMID: 32482892 DOI: 10.1074/jbc.ra120.013753] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 05/22/2020] [Indexed: 12/23/2022] Open
Abstract
Aortic dissection is a life-threatening aortopathy involving separation of the aortic wall, whose underlying mechanisms are still incompletely understood. Epidemiological evidence suggests that unsaturated fatty acids improve cardiovascular health. Here, using quantitative RT-PCR, histological analyses, magnetic cell sorting and flow cytometry assays, and MS-based lipidomics, we show that the activity of a lipid-metabolizing enzyme, secreted phospholipase A2 group V (sPLA2-V), protects against aortic dissection by endogenously mobilizing vasoprotective lipids. Global and endothelial cell-specific sPLA2-V-deficient mice frequently developed aortic dissection shortly after infusion of angiotensin II (AT-II). We observed that in the AT-II-treated aorta, endothelial sPLA2-V mobilized oleic and linoleic acids, which attenuated endoplasmic reticulum stress, increased the expression of lysyl oxidase, and thereby stabilized the extracellular matrix in the aorta. Of note, dietary supplementation with oleic or linoleic acid reversed the increased susceptibility of sPLA2-V-deficient mice to aortic dissection. These findings reveal an unexplored functional link between sPLA2-driven phospholipid metabolism and aortic stability, possibly contributing to the development of improved diagnostic and/or therapeutic strategies for preventing aortic dissection.
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Affiliation(s)
- Kazuhiro Watanabe
- Department of Internal Medicine II, University of Yamanashi, Department of Internal Medicine II, Chuo, Yamanashi Japan.,Lipid Metabolism Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Yoshitaka Taketomi
- Lipid Metabolism Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Yoshimi Miki
- Lipid Metabolism Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.,Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Kiyotaka Kugiyama
- Department of Internal Medicine II, University of Yamanashi, Department of Internal Medicine II, Chuo, Yamanashi Japan .,AMED-CREST, Japan Agency for Medical Research and Development, Tokyo, Japan
| | - Makoto Murakami
- Lipid Metabolism Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan .,Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.,AMED-CREST, Japan Agency for Medical Research and Development, Tokyo, Japan.,FORCE, Japan Agency for Medical Research and Development, Tokyo, Japan
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32
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Karagiannis F, Masouleh SK, Wunderling K, Surendar J, Schmitt V, Kazakov A, Michla M, Hölzel M, Thiele C, Wilhelm C. Lipid-Droplet Formation Drives Pathogenic Group 2 Innate Lymphoid Cells in Airway Inflammation. Immunity 2020; 52:620-634.e6. [PMID: 32268121 DOI: 10.1016/j.immuni.2020.03.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 01/31/2020] [Accepted: 03/12/2020] [Indexed: 12/26/2022]
Abstract
Innate lymphoid cells (ILCs) play an important role in the control and maintenance of barrier immunity. However, chronic activation of ILCs results in immune-mediated pathology. Here, we show that tissue-resident type 2 ILCs (ILC2s) display a distinct metabolic signature upon chronic activation. In the context of allergen-driven airway inflammation, ILC2s increase their uptake of both external lipids and glucose. Externally acquired fatty acids are transiently stored in lipid droplets and converted into phospholipids to promote the proliferation of ILC2s. This metabolic program is imprinted by interleukin-33 (IL-33) and regulated by the genes Pparg and Dgat1, which are both controlled by glucose availability and mTOR signaling. Restricting dietary glucose by feeding mice a ketogenic diet largely ablated ILC2-mediated airway inflammation by impairing fatty acid metabolism and the formation of lipid droplets. Together, these results reveal that pathogenic ILC2 responses require lipid metabolism and identify ketogenic diet as a potent intervention strategy to treat airway inflammation.
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Affiliation(s)
- Fotios Karagiannis
- Immunopathology Unit, Institute of Clinical Chemistry and Clinical Pharmacology, Medical Faculty, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Schekufe Kharabi Masouleh
- Immunopathology Unit, Institute of Clinical Chemistry and Clinical Pharmacology, Medical Faculty, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Klaus Wunderling
- Life & Medical Sciences Institute (LIMES), University of Bonn, 53115 Bonn, Germany
| | - Jayagopi Surendar
- Immunopathology Unit, Institute of Clinical Chemistry and Clinical Pharmacology, Medical Faculty, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Vanessa Schmitt
- Immunopathology Unit, Institute of Clinical Chemistry and Clinical Pharmacology, Medical Faculty, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Alexander Kazakov
- Immunopathology Unit, Institute of Clinical Chemistry and Clinical Pharmacology, Medical Faculty, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Marcel Michla
- Immunopathology Unit, Institute of Clinical Chemistry and Clinical Pharmacology, Medical Faculty, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Michael Hölzel
- Institute of Experimental Oncology, Medical Faculty, University of Bonn, 53127 Bonn, Germany
| | - Christoph Thiele
- Life & Medical Sciences Institute (LIMES), University of Bonn, 53115 Bonn, Germany
| | - Christoph Wilhelm
- Immunopathology Unit, Institute of Clinical Chemistry and Clinical Pharmacology, Medical Faculty, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany.
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Abstract
PURPOSE OF REVIEW Allergic diseases represent a growing global health concern, especially among pediatric populations. Current strategies for the treatment of allergies and asthma focus on limiting the severity of the symptoms; however, additional research investigating the mechanisms promoting inflammation in the context of allergic reactions may lead to the development of more effective therapeutic strategies. RECENT FINDINGS Novel studies have highlighted the contributions of innate lymphocytes to the induction of inflammatory responses to allergens. Remarkably, neuron-derived signals, hormones, and even vitamins have been suggested to modulate the activity of innate lymphocytes, opening new windows of opportunity for the treatment of allergic inflammation. SUMMARY These studies highlight the complex interactions of the nervous, endocrine, and immune system that promote pathology in the context of allergic inflammation. Further studies are required to understand these interactions in order to aid in the development of novel and much-needed therapies to treat allergic conditions.
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34
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Group 2 Innate Lymphoid Cells (ILC2): Type 2 Immunity and Helminth Immunity. Int J Mol Sci 2019; 20:ijms20092276. [PMID: 31072011 PMCID: PMC6539149 DOI: 10.3390/ijms20092276] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/02/2019] [Accepted: 05/06/2019] [Indexed: 12/22/2022] Open
Abstract
Group 2 innate lymphoid cells (ILC2) have emerged as a major component of type 2 inflammation in mice and humans. ILC2 secrete large amounts of interleukins 5 and 13, which are largely responsible for host protective immunity against helminth parasites because these cytokines induce profound changes in host physiology that include: goblet cell metaplasia, mucus accumulation, smooth muscle hypercontractility, eosinophil and mast cell recruitment, and alternative macrophage activation (M2). This review covers the initial recognition of ILC2 as a distinct cell lineage, the key studies that established their biological importance, particularly in helminth infection, and the new directions that are likely to be the focus of emerging work that further explores this unique cell population in the context of health and disease.
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Samuchiwal SK, Balestrieri B. Harmful and protective roles of group V phospholipase A 2: Current perspectives and future directions. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1864:819-826. [PMID: 30308324 DOI: 10.1016/j.bbalip.2018.10.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 09/27/2018] [Accepted: 10/01/2018] [Indexed: 12/17/2022]
Abstract
Group V Phospholipase A2 (Pla2g5) is a member of the PLA2 family of lipid-generating enzymes. It is expressed in immune and non-immune cell types and is inducible during several pathologic conditions serving context-specific functions. In this review, we recapitulate the protective and detrimental functions of Pla2g5 investigated through preclinical and translational approaches. This article is part of a Special Issue entitled Novel functions of phospholipase A2 Guest Editors: Makoto Murakami and Gerard Lambeau.
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Affiliation(s)
- Sachin K Samuchiwal
- Department of Medicine, Harvard Medical School, Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Barbara Balestrieri
- Department of Medicine, Harvard Medical School, Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, MA 02115, USA.
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