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Liu X, Dong M, Li Y, Li L, Zhang Y, Wang C, Wang N, Wang D. Structural properties of glucan from Russula griseocarnosa and its immunomodulatory activities mediated via T cell differentiation. Carbohydr Polym 2024; 339:122214. [PMID: 38823900 DOI: 10.1016/j.carbpol.2024.122214] [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: 01/23/2024] [Revised: 04/25/2024] [Accepted: 04/26/2024] [Indexed: 06/03/2024]
Abstract
The polysaccharide, RGP2, was isolated from Russula griseocarnosa and its immunostimulatory effects were confirmed in cyclophosphamide (CTX)-induced immunosuppressed mice. Following purification via chromatography, structural analysis revealed that RGP2 had a molecular weight of 11.82 kDa and consisted of glucose (Glc), galactose (Gal), mannose, glucuronic acid and glucosamine. Bond structure analysis and nuclear magnetic resonance characterization confirmed that the main chain of RGP2 was formed by →6)-β-D-Glcp-(1→, →3)-β-D-Glcp-(1→ and →6)-α-D-Galp-(1→, which was substituted at O-3 of →6)-β-D-Glcp-(1→ by β-D-Glcp-(1→. RGP2 was found to ameliorate pathological damage in the spleen and enhance immune cell activity in immunosuppressed mice. Based on combined multiomics analysis, RGP2 altered the abundance of immune-related microbiota (such as Lactobacillus, Faecalibacterium, and Bacteroides) in the gut and metabolites (uridine, leucine, and tryptophan) in the serum. Compared with immunosuppressed mice, RGP2 also restored the function of antigen-presenting cells, promoted the polarization of macrophages into the M1 phenotype, positively affected the differentiation of helper T cells, and inhibited regulatory T cell differentiation through the protein kinase B (AKT)/mechanistic target of rapamycin (mTOR) pathway, ultimately exerting an immune boosting function. Overall, our findings highlight therapeutic strategies to alleviate CTX-induced immunosuppression in a clinical setting.
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Affiliation(s)
- Xin Liu
- School of Life Sciences, Jilin University, Changchun 130012, China; School of Health Science and Biomedical Engineering, Hebei University of Technology, Tianjin, 300131, China.
| | - Mingyuan Dong
- School of Life Sciences, Jilin University, Changchun 130012, China.
| | - Yuan Li
- School of Life Sciences, Jilin University, Changchun 130012, China.
| | - Lanzhou Li
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, School of Plant Protection, Jilin Agricultural University, Changchun 130118, China.
| | - Yongfeng Zhang
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, School of Plant Protection, Jilin Agricultural University, Changchun 130118, China.
| | - Chunyue Wang
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, School of Plant Protection, Jilin Agricultural University, Changchun 130118, China.
| | - Ning Wang
- School of Chinese Medicine, The University of Hong Kong, 6/F, 3 Sassoon Road, Pokfulam 000000, Hong Kong.
| | - Di Wang
- School of Life Sciences, Jilin University, Changchun 130012, China; Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, School of Plant Protection, Jilin Agricultural University, Changchun 130118, China.
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Zhou M, Ma X, Zhang J, Lu X. 3,5-Dimethyl-8-methoxy-3,4-dihydro-1 H-isochromen-6-ol Attenuates Ulcerative Colitis via Targeting NLRP3 in Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:16700-16707. [PMID: 39037174 DOI: 10.1021/acs.jafc.4c00971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
3,5-Dimethyl-8-methoxy-3,4-dihydro-1H-isochromen-6-ol (DMD) is a polyketide compound obtained from the endophytic fungus Penicillium sp. HJT-A-10 of Rhodiola tibetica. R. tibetica is a nourishing food and also used in traditional Chinese medicine and Xizang medicine. In dextran sulfate sodium (DSS)-induced ulcerative colitis (UC) mice, DMD significantly alleviated the pathological symptom of UC. Network pharmacology studies have shown that nucleotide-binding domain-like receptor family pyrin domain containing (NLRP) 3 is the primary target protein of DMD associated with anti-UC. In molecular biology studies, DMD suppressed the activation of NLRP3 and decreased the expression of downstream inflammatory proteins and pro-inflammatory cytokines in UC. The finding was further verified in knockout mice. DMD lost the effect of attenuating DSS-induced UC in NLRP3-/- mice. In conclusion, this study demonstrates that DMD reduces inflammatory response and balances the barrier integrity to attenuate UC via targeting NLRP3, and DMD is a potential natural agent or dietary supplement for attenuating UC.
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Affiliation(s)
- Mengru Zhou
- Medical College, Dalian University, Dalian 116622, China
| | - Xiaoyao Ma
- College of Life and Health, Dalian University, Dalian 116622, China
| | - Jiaqi Zhang
- Medical College, Dalian University, Dalian 116622, China
| | - Xuan Lu
- College of Life and Health, Dalian University, Dalian 116622, China
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Kumar V, Stewart Iv JH. Pattern-Recognition Receptors and Immunometabolic Reprogramming: What We Know and What to Explore. J Innate Immun 2024; 16:295-323. [PMID: 38740018 PMCID: PMC11250681 DOI: 10.1159/000539278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 05/07/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND Evolutionarily, immune response is a complex mechanism that protects the host from internal and external threats. Pattern-recognition receptors (PRRs) recognize MAMPs, PAMPs, and DAMPs to initiate a protective pro-inflammatory immune response. PRRs are expressed on the cell membranes by TLR1, 2, 4, and 6 and in the cytosolic organelles by TLR3, 7, 8, and 9, NLRs, ALRs, and cGLRs. We know their downstream signaling pathways controlling immunoregulatory and pro-inflammatory immune response. However, the impact of PRRs on metabolic control of immune cells to control their pro- and anti-inflammatory activity has not been discussed extensively. SUMMARY Immune cell metabolism or immunometabolism critically determines immune cells' pro-inflammatory phenotype and function. The current article discusses immunometabolic reprogramming (IR) upon activation of different PRRs, such as TLRs, NLRs, cGLRs, and RLRs. The duration and type of PRR activated, species studied, and location of immune cells to specific organ are critical factors to determine the IR-induced immune response. KEY MESSAGE The work herein describes IR upon TLR, NLR, cGLR, and RLR activation. Understanding IR upon activating different PRRs is critical for designing better immune cell-specific immunotherapeutics and immunomodulators targeting inflammation and inflammatory diseases.
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Affiliation(s)
- Vijay Kumar
- Department of Surgery, Laboratory of Tumor Immunology and Immunotherapy, Medical Education Building-C, Morehouse School of Medicine, Atlanta, Georgia, USA
| | - John H Stewart Iv
- Department of Surgery, Laboratory of Tumor Immunology and Immunotherapy, Medical Education Building-C, Morehouse School of Medicine, Atlanta, Georgia, USA
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Li W, Wu J, Zeng Y, Zheng W. Neuroinflammation in epileptogenesis: from pathophysiology to therapeutic strategies. Front Immunol 2023; 14:1269241. [PMID: 38187384 PMCID: PMC10771847 DOI: 10.3389/fimmu.2023.1269241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 12/07/2023] [Indexed: 01/09/2024] Open
Abstract
Epilepsy is a group of enduring neurological disorder characterized by spontaneous and recurrent seizures with heterogeneous etiology, clinical expression, severity, and prognosis. Growing body of research investigates that epileptic seizures are originated from neuronal synchronized and excessive electrical activity. However, the underlying molecular mechanisms of epileptogenesis have not yet been fully elucidated and 30% of epileptic patients still are resistant to the currently available pharmacological treatments with recurrent seizures throughout life. Over the past two decades years accumulated evidences provide strong support to the hypothesis that neuroinflammation, including microglia and astrocytes activation, a cascade of inflammatory mediator releasing, and peripheral immune cells infiltration from blood into brain, is associated with epileptogenesis. Meanwhile, an increasing body of preclinical researches reveal that the anti-inflammatory therapeutics targeting crucial inflammatory components are effective and promising in the treatment of epilepsy. The aim of the present study is to highlight the current understanding of the potential neuroinflammatory mechanisms in epileptogenesis and the potential therapeutic targets against epileptic seizures.
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Cao M, Lai P, Liu X, Liu F, Qin Y, Tu P, Wang Y. ATF5 promotes malignant T cell survival through the PI3K/AKT/mTOR pathway in cutaneous T cell lymphoma. Front Immunol 2023; 14:1282996. [PMID: 38223508 PMCID: PMC10786347 DOI: 10.3389/fimmu.2023.1282996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/08/2023] [Indexed: 01/16/2024] Open
Abstract
Backgrounds Cutaneous T cell lymphoma (CTCL) is a non-Hodgkin lymphoma characterized by skin infiltration of malignant T cells. The biological overlap between malignant T cells and their normal counterparts has brought obstacles in identifying tumor-specific features and mechanisms, limiting current knowledge of CTCL pathogenesis. Transcriptional dysregulation leading to abnormal gene expression profiles contributes to the initiation, progression and drug resistance of cancer. Therefore, we aimed to identify tumor-specific transcription factor underlying CTCL pathology. Methods We analyzed and validated the differentially expressed genes (DEGs) in malignant T cells based on single-cell sequencing data. Clinical relevance was evaluated based on progression-free survival and time to next treatment. To determine the functional importance, lentivirus-mediated gene knockdown was conducted in two CTCL cell lines Myla and H9. Cell survival was assessed by examining cell viability, colony-forming ability, in-vivo tumor growth in xenograft models, apoptosis rate and cell-cycle distribution. RNA sequencing was employed to investigate the underlying mechanisms. Results Activating transcription factor 5 (ATF5) was overexpressed in malignant T cells and positively correlated with poor treatment responses in CTCL patients. Mechanistically, ATF5 promoted the survival of malignant T cells partially through the PI3K/AKT/mTOR pathway, and imparted resistance to endoplasmic reticulum (ER) stress-induced apoptosis. Conclusions These findings revealed the tumor-specific overexpression of the transcription factor ATF5 with its underlying mechanisms in promoting tumor survival in CTCL, providing new insight into the understanding of CTCL's pathology.
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Affiliation(s)
- Mengzhou Cao
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Pan Lai
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Xiangjun Liu
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Fengjie Liu
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Yao Qin
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Ping Tu
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Yang Wang
- Department of Dermatology and Venereology, Peking University First Hospital, Beijing, China
- Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
- National Clinical Research Center for Skin and Immune Diseases, Beijing, China
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Li W, Chen Y, Zhang Y, Zhao N, Zhang W, Shi M, Zhao Y, Cai C, Lu C, Gao P, Guo X, Li B, Kim SW, Yang Y, Cao G. Transcriptome Analysis Revealed Potential Genes of Skeletal Muscle Thermogenesis in Mashen Pigs and Large White Pigs under Cold Stress. Int J Mol Sci 2023; 24:15534. [PMID: 37958518 PMCID: PMC10650474 DOI: 10.3390/ijms242115534] [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: 09/07/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023] Open
Abstract
Pigs are susceptible to cold stress due to the absence of brown fat caused by the partial deletion of uncoupling protein 1 during their evolution. Some local pig breeds in China exhibit potential cold adaptability, but research has primarily focused on fat and intestinal tissues. Skeletal muscle plays a key role in adaptive thermogenesis in mammals, yet the molecular mechanism of cold adaptation in porcine skeletal muscle remains poorly understood. This study investigated the cold adaptability of two pig breeds, Mashen pigs (MS) and Large White pigs (LW), in a four-day cold (4 °C) or normal temperature (25 °C) environment. We recorded phenotypic changes and collected blood and longissimus dorsi muscle for transcriptome sequencing. Finally, the PRSS8 gene was randomly selected for functional exploration in porcine skeletal muscle satellite cells. A decrease in body temperature and body weight in both LW and MS pigs under cold stress, accompanied by increased shivering frequency and respiratory frequency, were observed. However, the MS pigs demonstrated stable physiological homeostasis, indicating a certain level of cold adaptability. The LW pigs primarily responded to cold stress by regulating their heat production and glycolipid energy metabolism. The MS pigs exhibited a distinct response to cold stress, involving the regulation of heat production, energy metabolism pathways, and robust mitochondrial activity, as well as a stronger immune response. Furthermore, the functional exploration of PRSS8 in porcine skeletal muscle satellite cells revealed that it affected cellular energy metabolism and thermogenesis by regulating ERK phosphorylation. These findings shed light on the diverse transcriptional responses of skeletal muscle in LW and MS pigs under cold stress, offering valuable insights into the molecular mechanisms underlying cold adaptation in pigs.
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Affiliation(s)
- Wenxia Li
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Yufen Chen
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Yunting Zhang
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Ning Zhao
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Wanfeng Zhang
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Mingyue Shi
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Yan Zhao
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Chunbo Cai
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Chang Lu
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Pengfei Gao
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Xiaohong Guo
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Bugao Li
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Sung-Woo Kim
- Department of Animal Science, North Carolina State University, Raleigh, NC 27695, USA
| | - Yang Yang
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
| | - Guoqing Cao
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China; (W.L.)
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Overcast GR, Meibers HE, Eshleman EM, Saha I, Waggoner L, Patel KN, Jain VG, Haslam DB, Alenghat T, VanDussen KL, Pasare C. IEC-intrinsic IL-1R signaling holds dual roles in regulating intestinal homeostasis and inflammation. J Exp Med 2023; 220:e20212523. [PMID: 36976181 PMCID: PMC10067527 DOI: 10.1084/jem.20212523] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 12/20/2022] [Accepted: 03/02/2023] [Indexed: 03/29/2023] Open
Abstract
Intestinal epithelial cells (IECs) constitute a critical first line of defense against microbes. While IECs are known to respond to various microbial signals, the precise upstream cues regulating diverse IEC responses are not clear. Here, we discover a dual role for IEC-intrinsic interleukin-1 receptor (IL-1R) signaling in regulating intestinal homeostasis and inflammation. Absence of IL-1R in epithelial cells abrogates a homeostatic antimicrobial program including production of antimicrobial peptides (AMPs). Mice deficient for IEC-intrinsic IL-1R are unable to clear Citrobacter rodentium (C. rodentium) but are protected from DSS-induced colitis. Mechanistically, IL-1R signaling enhances IL-22R-induced signal transducer and activator of transcription 3 (STAT3) phosphorylation in IECs leading to elevated production of AMPs. IL-1R signaling in IECs also directly induces expression of chemokines as well as genes involved in the production of reactive oxygen species. Our findings establish a protective role for IEC-intrinsic IL-1R signaling in combating infections but a detrimental role during colitis induced by epithelial damage.
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Affiliation(s)
- Garrett R. Overcast
- Immunology Graduate Program, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Hannah E. Meibers
- Immunology Graduate Program, Cincinnati Children’s Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Emily M. Eshleman
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Irene Saha
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Lisa Waggoner
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Krupaben N. Patel
- Divisions of Gastroenterology, Hepatology, and Nutrition and of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - Viral G. Jain
- Division of Neonatology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - David B. Haslam
- Division of Infectious Diseases, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Theresa Alenghat
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Kelli L. VanDussen
- Divisions of Gastroenterology, Hepatology, and Nutrition and of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Chandrashekhar Pasare
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
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Mulcahy V, Liaskou E, Martin JE, Kotagiri P, Badrock J, Jones RL, Rushbrook SM, Ryder SD, Thorburn D, Taylor-Robinson SD, Clark G, Cordell HJ, Sandford RN, Jones DE, Hirschfield GM, Mells GF. Regulation of immune responses in primary biliary cholangitis: a transcriptomic analysis of peripheral immune cells. Hepatol Commun 2023; 7:e0110. [PMID: 37026715 PMCID: PMC10079354 DOI: 10.1097/hc9.0000000000000110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 12/21/2022] [Indexed: 04/08/2023] Open
Abstract
BACKGROUND AIMS In patients with primary biliary cholangitis (PBC), the serum liver biochemistry measured during treatment with ursodeoxycholic acid-the UDCA response-accurately predicts long-term outcome. Molecular characterization of patients stratified by UDCA response can improve biological understanding of the high-risk disease, thereby helping to identify alternative approaches to disease-modifying therapy. In this study, we sought to characterize the immunobiology of the UDCA response using transcriptional profiling of peripheral blood mononuclear cell subsets. METHODS We performed bulk RNA-sequencing of monocytes and TH1, TH17, TREG, and B cells isolated from the peripheral blood of 15 PBC patients with adequate UDCA response ("responders"), 16 PBC patients with inadequate UDCA response ("nonresponders"), and 15 matched controls. We used the Weighted Gene Co-expression Network Analysis to identify networks of co-expressed genes ("modules") associated with response status and the most highly connected genes ("hub genes") within them. Finally, we performed a Multi-Omics Factor Analysis of the Weighted Gene Co-expression Network Analysis modules to identify the principal axes of biological variation ("latent factors") across all peripheral blood mononuclear cell subsets. RESULTS Using the Weighted Gene Co-expression Network Analysis, we identified modules associated with response and/or disease status (q<0.05) in each peripheral blood mononuclear cell subset. Hub genes and functional annotations suggested that monocytes are proinflammatory in nonresponders, but antiinflammatory in responders; TH1 and TH17 cells are activated in all PBC cases but better regulated in responders; and TREG cells are activated-but also kept in check-in responders. Using the Multi-Omics Factor Analysis, we found that antiinflammatory activity in monocytes, regulation of TH1 cells, and activation of TREG cells are interrelated and more prominent in responders. CONCLUSIONS We provide evidence that adaptive immune responses are better regulated in patients with PBC with adequate UDCA response.
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Affiliation(s)
- Victoria Mulcahy
- Academic Department of Medical Genetics, University of Cambridge, Cambridge, UK
- Cambridge Liver Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Evaggelia Liaskou
- Centre for Liver and Gastrointestinal Research, National Institute for Health Research (NIHR) Birmingham Biomedical Research Centre (BRC), University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, UK
- Institute of Immunology & Immunotherapy, University of Birmingham, Birmingham, UK
| | - Jose-Ezequiel Martin
- Academic Department of Medical Genetics, University of Cambridge, Cambridge, UK
- Cancer Molecular Diagnostic Laboratory, Oncology Department, University of Cambridge, Cambridge, UK
| | - Prasanti Kotagiri
- Cambridge Institute of Therapeutic Immunology and Infectious Diseases, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge, UK
- Department of Medicine, University of Cambridge, Cambridge, UK
| | - Jonathan Badrock
- Academic Department of Medical Genetics, University of Cambridge, Cambridge, UK
| | - Rebecca L. Jones
- Leeds Liver Unit, The Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Simon M Rushbrook
- Department of Hepatology, Norwich Medical School, University of East Anglia, Norwich, UK
| | - Stephen D. Ryder
- NIHR Nottingham BRC, Nottingham University Hospitals NHS Trust, University of Nottingham, Nottingham, UK
| | - Douglas Thorburn
- The Sheila Sherlock Liver Centre, Royal Free London NHS Foundation Trust, London, UK
| | | | - Graeme Clark
- Stratified Medicine Core Laboratory (SMCL) Next Generation Sequencing Hub, NIHR Cambridge BRC, Cambridge, UK
| | - Heather J. Cordell
- Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle-upon-Tyne, UK
| | - Richard N. Sandford
- Academic Department of Medical Genetics, University of Cambridge, Cambridge, UK
| | - David E. Jones
- Institute of Cellular Medicine, Newcastle University, Newcastle-upon-Tyne, UK
- NIHR Newcastle BRC, Newcastle University, Newcastle-upon-Tyne, UK
| | - Gideon M. Hirschfield
- Toronto Centre for Liver Disease, University Health Network and Department of Medicine, University of Toronto, Toronto, Canada
| | - George F. Mells
- Academic Department of Medical Genetics, University of Cambridge, Cambridge, UK
- Cambridge Liver Unit, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
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9
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Li Z, Sun Q, Liu Q, Mu X, Wang H, Zhang H, Qin F, Wang Q, Nie D, Liu A, Li Q, Ji J, Jiang Y, Lu S, Wang Q, Lu Z. Compound 511 ameliorates MRSA-induced lung injury by attenuating morphine-induced immunosuppression in mice via PI3K/AKT/mTOR pathway. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 108:154475. [PMID: 36252465 DOI: 10.1016/j.phymed.2022.154475] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 09/08/2022] [Accepted: 09/24/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Opioids are widely used in clinical practice. However, their long-term administration causes respiratory depression, addiction, tolerance, and severe immunosuppression. Traditional Chinese medicine (TCM) can alleviate opioid-induced adverse effects. Compound 511 is particularly developed for treating opioid addiction, based on Jiumi Liangfang, an ancient Chinese drug treatment and rehabilitation monograph completed in 1833 A.D. It is an herbal formula containing eight plants, each of them contributing to the overall pharmacological effect of the product: Panax ginseng C. A. Meyer (8.8%), Astragalus membranaceus (Fisch.) (18.2%), Datura metel Linn. (10.95%), Corydalis yanhusuo W. T. Wang (14.6%), Acanthopanar gracilistμlus W. W. Smith (10.95%), Ophiopogon japonicus (Linn. f.) Ker-Gawl. (10.95%), Gynostemma pentaphyllum (Thunb.) Makino (10.95%), Polygala arvensis Willd. (14.6%). This formula effectively ameliorates opioid-induced immunosuppression. However, the underlying mechanism remains unclear. PURPOSE To reveal the effects of Compound 511 on the immune response of morphine-induced immunosuppressive mice and their potential underlying molecular mechanism. This study provides information for a better clinical approach and scientific use of opioids. METHODS Immunosuppression was induced in mice by repeated morphine administration. Th1/Th2/Th17/Treg cell levels were measured using flow cytometry. Splenic transcription factors of Th1/Th2/Th17/Treg and outputs of the regulatory PI3K/AKT/mTOR signaling pathway were determined. Subsequently, methicillin-resistant Staphylococcus aureus (MRSA) was administered intranasally to morphine-induced immunosuppressive mice pretreated with Compound 511. Their lung inflammatory status was assessed using micro-computer tomography (CT), hematoxylin and eosin (H&E) staining, and enzyme-linked immunosorbent assay (ELISA). RESULTS Compared to morphine, Compound 511 significantly decreased the immune organ indexes of mice, corrected the Th1/Th2 and Treg/Th17 imbalance in the immune organs and peripheral blood, reduced the mRNA levels of FOXP3 and GATA3, and increased those of STAT3 and T-bet in the spleen. It improved immune function and reduced MRSA-induced lung inflammation. CONCLUSION Compound 511 ameliorates opioid-induced immunosuppression by regulating the balance of Th1/Th2 and Th17/Treg via PI3K/AKT/mTOR signaling pathway. Thus, it effectively reduces susceptibility of morphine-induced immunosuppressive mice to MRSA infection.
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Affiliation(s)
- Zhonghao Li
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Qinmei Sun
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine in Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Qingyang Liu
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xinru Mu
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Hui Wang
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Han Zhang
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine in Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Fenfen Qin
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Qisheng Wang
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Dengyun Nie
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Anlong Liu
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Qian Li
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Jianjian Ji
- Jiangsu Key Laboratory of Pediatric Respiratory Disease, Institute of Pediatrics, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yongwei Jiang
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Shengfeng Lu
- Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Qian Wang
- College of International Education, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Zhigang Lu
- Nanjing Hospital of Chinese Medicine affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China; Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine in Prevention and Treatment of Tumor, Nanjing University of Chinese Medicine, Nanjing 210023, China; Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, China.
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10
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Franchin M, Taira TM, da Silva Prado D, Hernandez CAS, de Andrade FB, Abdalla HB, Napimoga MH, Cunha TM, Fukada SY, Rosalen PL. PI3Kγ controls IL-17A expression and attenuates alveolar bone loss in an experimental periodontitis model. Inflamm Res 2023; 72:107-114. [PMID: 36333479 DOI: 10.1007/s00011-022-01662-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE In this study, we investigated the modulatory effects of PI3Kγ on IL-17A expression and the progression of experimental periodontitis in vivo. METHODS Ligature-induced periodontitis was developed around the first molar of mice. Animals were treated with anti-mouse IL-17A or IPI-549 (PI3Kγ inhibitor). In addition, PI3Kγ-deficient mice (PI3Kγ-/-) were used in the study. Alveolar bone loss was measured and real-time PCR of Il17a and Rankl genes was performed. A bioinformatics analysis was carried out using the Gene Set Enrichment Analysis computational tool. RESULTS Nine days after ligature placement, alveolar bone loss scores were significantly increased, with upregulation of Il17a and Rankl genes in the gingival tissues. Treatment with anti-mouse IL-17A (100 µg/mice) significantly attenuated alveolar bone loss. Mice with ligature-induced periodontitis treated with IPI-549 (3 mg/kg) or PI3Kγ-/- mice showed reduced alveolar bone loss and downregulation of Il17a and Rankl gene expression in the gingival tissues. Consistent with this, the bioinformatics analysis showed upregulation of IL17F, IL17A, IL17D, and STAT3 genes, as well as greater activation of IL-17 and PI3KCI pathways (upregulation of PIK3CG gene) in the gingival tissue of patients with periodontitis. CONCLUSION PI3Kγ plays an important role in modulating IL-17A expression and alveolar bone loss in vivo and can be considered a promising pathway for the management of periodontal disease and the development of new therapies.
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Affiliation(s)
- Marcelo Franchin
- Department of Physiological Sciences, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
- School of Dentistry, Federal University Alfenas (Unifal-MG), Alfenas, MG, Brazil.
| | - Thaise Mayumi Taira
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Douglas da Silva Prado
- Center for Research in Inflammatory Diseases (CRID), University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | - Fabio Bonifácio de Andrade
- Center for Research in Inflammatory Diseases (CRID), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Henrique Ballassini Abdalla
- Laboratory of Neuroimmune Interface of Pain Research, São Leopoldo Mandic Institute and Research Center, Campinas, SP, Brazil
| | - Marcelo Henrique Napimoga
- Laboratory of Neuroimmune Interface of Pain Research, São Leopoldo Mandic Institute and Research Center, Campinas, SP, Brazil
| | - Thiago Mattar Cunha
- Center for Research in Inflammatory Diseases (CRID), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Sandra Yasuyo Fukada
- Department of BioMolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
- Center for Research in Inflammatory Diseases (CRID), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Pedro Luiz Rosalen
- Department of Physiological Sciences, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
- Graduate Program in Biological Sciences, Federal University of Alfenas (Unifal-MG), Alfenas, MG, Brazil.
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11
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Molecular Characterization of a B Cell Adaptor for Phosphoinositide 3-Kinase Homolog in Lamprey ( Lampetra japonica) and Its Function in the Immune Response. Int J Mol Sci 2022; 23:ijms232214449. [PMID: 36430927 PMCID: PMC9695028 DOI: 10.3390/ijms232214449] [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: 10/31/2022] [Revised: 11/17/2022] [Accepted: 11/18/2022] [Indexed: 11/22/2022] Open
Abstract
Human B cell adaptor for phosphoinositide 3-kinase (BCAP) is identified as an adaptor protein expressed in B cells and plays a critical immunomodulatory role in B cell receptor signaling and humoral immune response. In the current study, a homolog of BCAP (Lja-BCAP) was identified in Lampetra japonica. The open reading frame of Lja-BCAP contains 2181bp nucleotides and encodes a protein of 726 amino acids. After being stimulated by mixed bacteria, the mRNA and protein expression levels of Lja-BCAP and the activation levels of tyrosine kinases increased significantly in peripheral blood lymphocytes, gills and supraneural myeloid bodies, respectively. However, after the knockdown of Lja-BCAP by RNAi in vivo, the activation of tyrosine kinases was inhibited in the above tissues, which indicated that Lja-BCAP participated in the anti-bacterial immune response of lampreys. After lipopolysaccharide (LPS) stimulation, the expression of Lja-BCAP in peripheral blood lymphocytes, gills and supraneural myeloid bodies were significantly up-regulated 2.5, 2.2, and 11.1 times (p < 0.05) compared to the control group, respectively; while after phytohemagglutinin (PHA) stimulation, the up-regulation of Lja-BCAP was only detected in peripheral blood lymphocytes. The above results show that Lja-BCAP mainly participates in the LPS-mediated immune response of lampreys.
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12
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Boulund U, Bastos DM, Ferwerda B, van den Born BJ, Pinto-Sietsma SJ, Galenkamp H, Levin E, Groen AK, Zwinderman AH, Nieuwdorp M. Gut microbiome associations with host genotype vary across ethnicities and potentially influence cardiometabolic traits. Cell Host Microbe 2022; 30:1464-1480.e6. [PMID: 36099924 DOI: 10.1016/j.chom.2022.08.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 06/16/2022] [Accepted: 08/17/2022] [Indexed: 12/13/2022]
Abstract
Previous studies in mainly European populations have reported that the gut microbiome composition is associated with the human genome. However, the genotype-microbiome interaction in different ethnicities is largely unknown. We performed a large fecal microbiome genome-wide association study of a single multiethnic cohort, the Healthy Life in an Urban Setting (HELIUS) cohort (N = 4,117). Mendelian randomization was performed using the multiethnic Pan-UK Biobank (N = 460,000) to dissect potential causality. We identified ethnicity-specific associations between host genomes and gut microbiota. Certain microbes were associated with genotype in multiple ethnicities. Several of the microbe-associated loci were found to be related to immune functions, interact with glutamate and the mucus layer, or be expressed in the gut or brain. Additionally, we found that gut microbes potentially influence cardiometabolic health factors such as BMI, cholesterol, and blood pressure. This provides insight into the relationship of ethnicity and gut microbiota and into the possible causal effects of gut microbes on cardiometabolic traits.
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Affiliation(s)
- Ulrika Boulund
- Department of Internal and Vascular Medicine, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands
| | - Diogo M Bastos
- Department of Internal and Vascular Medicine, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands
| | - Bart Ferwerda
- Department of Clinical Epidemiology and Biostatistics, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands
| | - Bert-Jan van den Born
- Department of Internal and Vascular Medicine, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands; Department of Public and Occupational Health, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands
| | - Sara-Joan Pinto-Sietsma
- Department of Internal and Vascular Medicine, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands; Department of Clinical Epidemiology and Biostatistics, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands
| | - Henrike Galenkamp
- Department of Public and Occupational Health, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands
| | - Evgeni Levin
- Department of Internal and Vascular Medicine, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands; HorAIzon BV, 2645 LT Delfgauw, the Netherlands
| | - Albert K Groen
- Department of Internal and Vascular Medicine, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands
| | - Aeilko H Zwinderman
- Department of Clinical Epidemiology and Biostatistics, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands
| | - Max Nieuwdorp
- Department of Internal and Vascular Medicine, Amsterdam University Medical Centers, location AMC, 1105 AZ Amsterdam, the Netherlands.
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13
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Yang B, Gao Z, Li QS, Zhang XY, Song L, Wang YN, Wang XY, Ji LL, Xu HL, Xie H, Feng FK, Li XP, Li W, Wang R, Wang GS. Proteomic analysis and identification reveal the anti-inflammatory mechanism of clofazimine on lipopolysaccharide-induced acute lung injury in mice. Inflamm Res 2022; 71:1327-1345. [PMID: 35962798 PMCID: PMC9376043 DOI: 10.1007/s00011-022-01623-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 08/01/2022] [Accepted: 08/04/2022] [Indexed: 11/13/2022] Open
Abstract
Background and objective Acute lung injury (ALI)/ acute respiratory distress syndrome (ARDS) was increasingly recognized as one of the most severe acute hyperimmune response of coronavirus disease 2019 (COVID-19). Clofazimine (CFZ) has attracted attention due to its anti-inflammatory property in immune diseases as well as infectious diseases. However, the role and potential molecular mechanism of CFZ in anti-inflammatory responses remain unclear. Methods We analyze the protein expression profiles of CFZ and LPS from Raw264.7 macrophages using quantitative proteomics. Next, the protective effect of CFZ on LPS-induced inflammatory model is assessed, and its underlying mechanism is validated by molecular biology analysis. Results LC–MS/MS-based shotgun proteomics analysis identified 4746 (LPS) and 4766 (CFZ) proteins with quantitative information. The key proteins and their critical signal transduction pathways including TLR4/NF-κB/HIF-1α signaling was highlighted, which was involved in multiple inflammatory processes. A further analysis of molecular biology revealed that CFZ could significantly inhibit the proliferation of Raw264.7 macrophages, decrease the levels of TNF-α and IL-1β, alleviate lung histological changes and pulmonary edema, improve the survival rate, and down-regulate TLR4/NF-κB/HIF-1α signaling in LPS model. Conclusion This study can provide significant insight into the proteomics-guided pharmacological mechanism study of CFZ and suggest potential therapeutic strategies for infectious disease. Supplementary Information The online version contains supplementary material available at 10.1007/s00011-022-01623-w.
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Affiliation(s)
- Bo Yang
- Department of Thoracic Surgery, Tianjin Baodi Hospital, Baodi Clinical College, Tianjin Medical University, Guangchuan Road, Baodi District, Tianjin, 301800, People's Republic of China.,State Key Laboratory of Proteomics, Beijing Proteome Research Center, Institute of Lifeomics, National Center for Protein Sciences, Beijing, 102206, People's Republic of China
| | - Zhan Gao
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Institute of Lifeomics, National Center for Protein Sciences, Beijing, 102206, People's Republic of China.,College of Chemistry and Environment Science, Hebei University, Baoding, 071002, People's Republic of China
| | - Qi-Shuang Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Institute of Lifeomics, National Center for Protein Sciences, Beijing, 102206, People's Republic of China.,Guangxi Key Laboratory of Bio-Targeting Theranostics, National Center for International Research of Bio-Targeting Theranostics, Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Xiang-Ye Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Institute of Lifeomics, National Center for Protein Sciences, Beijing, 102206, People's Republic of China.,College of Chemistry and Environment Science, Hebei University, Baoding, 071002, People's Republic of China
| | - Lan Song
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Institute of Lifeomics, National Center for Protein Sciences, Beijing, 102206, People's Republic of China
| | - Yi-Ni Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Institute of Lifeomics, National Center for Protein Sciences, Beijing, 102206, People's Republic of China
| | - Xin-Yue Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Institute of Lifeomics, National Center for Protein Sciences, Beijing, 102206, People's Republic of China
| | - Lin-Lin Ji
- Department of Thoracic Surgery, Tianjin Baodi Hospital, Baodi Clinical College, Tianjin Medical University, Guangchuan Road, Baodi District, Tianjin, 301800, People's Republic of China.,State Key Laboratory of Proteomics, Beijing Proteome Research Center, Institute of Lifeomics, National Center for Protein Sciences, Beijing, 102206, People's Republic of China
| | - Hong-Liang Xu
- Department of Thoracic Surgery, Tianjin Baodi Hospital, Baodi Clinical College, Tianjin Medical University, Guangchuan Road, Baodi District, Tianjin, 301800, People's Republic of China
| | - Hui Xie
- Department of Thoracic Surgery, Tianjin Baodi Hospital, Baodi Clinical College, Tianjin Medical University, Guangchuan Road, Baodi District, Tianjin, 301800, People's Republic of China
| | - Fu-Kai Feng
- Department of Thoracic Surgery, Tianjin Baodi Hospital, Baodi Clinical College, Tianjin Medical University, Guangchuan Road, Baodi District, Tianjin, 301800, People's Republic of China
| | - Xiao-Ping Li
- Department of Thoracic Surgery, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin, 300192, People's Republic of China
| | - Wei Li
- Department of Thoracic Surgery, Tianjin First Central Hospital, School of Medicine, Nankai University, Tianjin, 300192, People's Republic of China
| | - Rong Wang
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Beichen District, Tianjin, 300401, People's Republic of China.
| | - Guang-Shun Wang
- Department of Thoracic Surgery, Tianjin Baodi Hospital, Baodi Clinical College, Tianjin Medical University, Guangchuan Road, Baodi District, Tianjin, 301800, People's Republic of China.
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14
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Ihim SA, Abubakar SD, Zian Z, Sasaki T, Saffarioun M, Maleknia S, Azizi G. Interleukin-18 cytokine in immunity, inflammation, and autoimmunity: Biological role in induction, regulation, and treatment. Front Immunol 2022; 13:919973. [PMID: 36032110 PMCID: PMC9410767 DOI: 10.3389/fimmu.2022.919973] [Citation(s) in RCA: 72] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 07/25/2022] [Indexed: 12/13/2022] Open
Abstract
Interleukin-18 (IL-18) is a potent pro-inflammatory cytokine involved in host defense against infections and regulates the innate and acquired immune response. IL-18 is produced by both hematopoietic and non-hematopoietic cells, including monocytes, macrophages, keratinocytes and mesenchymal cell. IL-18 could potentially induce inflammatory and cytotoxic immune cell activities leading to autoimmunity. Its elevated levels have been reported in the blood of patients with some immune-related diseases, including rheumatoid arthritis, systemic lupus erythematosus, type I diabetes mellitus, atopic dermatitis, psoriasis, and inflammatory bowel disease. In the present review, we aimed to summarize the biological properties of IL-18 and its pathological role in different autoimmune diseases. We also reported some monoclonal antibodies and drugs targeting IL-18. Most of these monoclonal antibodies and drugs have only produced partial effectiveness or complete ineffectiveness in vitro, in vivo and human studies. The ineffectiveness of these drugs targeting IL-18 may be largely due to the loophole caused by the involvement of other cytokines and proteins in the signaling pathway of many inflammatory diseases besides the involvement of IL-18. Combination drug therapies, that focus on IL-18 inhibition, in addition to other cytokines, are highly recommended to be considered as an important area of research that needs to be explored.
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Affiliation(s)
- Stella Amarachi Ihim
- Department of Molecular and Cellular Pharmacology, University of Shizuoka, Shizuoka, Japan
- Department of Pharmacology and Toxicology, University of Nigeria, Nsukka, Nigeria
- Department of Science Laboratory Technology, University of Nigeria, Nsukka, Nigeria
| | - Sharafudeen Dahiru Abubakar
- Division of Molecular Pathology, Research Institute for Biomedical Sciences, Tokyo University of Science, Tokyo, Japan
- Department of Medical Laboratory Science, College of Medical Science, Ahmadu Bello University, Zaria, Nigeria
| | - Zeineb Zian
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Takanori Sasaki
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Mohammad Saffarioun
- Biopharmaceutical Research Center, AryoGen Pharmed Inc., Alborz University of Medical Sciences, Karaj, Iran
| | - Shayan Maleknia
- Biopharmaceutical Research Center, AryoGen Pharmed Inc., Alborz University of Medical Sciences, Karaj, Iran
| | - Gholamreza Azizi
- Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
- *Correspondence: Gholamreza Azizi,
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15
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Zeng C, Hu J, Chen F, Huang T, Zhang L. The Coordination of mTOR Signaling and Non-Coding RNA in Regulating Epileptic Neuroinflammation. Front Immunol 2022; 13:924642. [PMID: 35898503 PMCID: PMC9310657 DOI: 10.3389/fimmu.2022.924642] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/16/2022] [Indexed: 11/13/2022] Open
Abstract
Epilepsy accounts for a significant proportion of the burden of neurological disorders. Neuroinflammation acting as the inflammatory response to epileptic seizures is characterized by aberrant regulation of inflammatory cells and molecules, and has been regarded as a key process in epilepsy where mTOR signaling serves as a pivotal modulator. Meanwhile, accumulating evidence has revealed that non-coding RNAs (ncRNAs) interfering with mTOR signaling are involved in neuroinflammation and therefore articipate in the development and progression of epilepsy. In this review, we highlight recent advances in the regulation of mTOR on neuroinflammatory cells and mediators, and feature the progresses of the interaction between ncRNAs and mTOR in epileptic neuroinflammation.
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Affiliation(s)
- Chudai Zeng
- Departments of Neurosurgery, and National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Jason Hu
- Department of Neonatology, Yale School of Medicine, New Haven, CT, United States
| | - Fenghua Chen
- Departments of Neurosurgery, and National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Fenghua Chen, ; Tianxiang Huang, ; Longbo Zhang,
| | - Tianxiang Huang
- Departments of Neurosurgery, and National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Fenghua Chen, ; Tianxiang Huang, ; Longbo Zhang,
| | - Longbo Zhang
- Departments of Neurosurgery, and National Clinical Research Center of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT, United States
- *Correspondence: Fenghua Chen, ; Tianxiang Huang, ; Longbo Zhang,
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16
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Phosphatidylinositol 3-Kinase (PI3K) Orchestrates Aspergillus fumigatus-Induced Eosinophil Activation Independently of Canonical Toll-Like Receptor (TLR)/C-Type-Lectin Receptor (CLR) Signaling. mBio 2022; 13:e0123922. [PMID: 35695427 PMCID: PMC9426586 DOI: 10.1128/mbio.01239-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Eosinophilia is associated with various persisting inflammatory diseases and often coincides with chronic fungal infections or fungal allergy as in the case of allergic bronchopulmonary aspergillosis (ABPA). Here, we show that intranasal administration of live Aspergillus fumigatus conidia causes fatal lung damage in eosinophilic interleukin-5 (IL-5)-transgenic mice. To further investigate the activation of eosinophils by A. fumigatus, we established a coculture system of mouse bone marrow-derived eosinophils (BMDE) with different A. fumigatus morphotypes and analyzed the secretion of cytokines, chemokines, and eicosanoids. A. fumigatus-stimulated BMDE upregulated expression of CD11b and downregulated CD62L and CCR3. They further secreted several proinflammatory mediators, including IL-4, IL-13, IL-18, macrophage inflammatory protein-1α (MIP-1α)/CC chemokine ligand 3 (CCL3), MIP-1β/CCL4, and thromboxane. This effect required direct interaction and adherence between eosinophils and A. fumigatus, as A. fumigatus culture supernatants or A. fumigatus mutant strains with impaired adhesion elicited a rather poor eosinophil response. Unexpectedly, canonical Toll-like receptor (TLR) or C-type-lectin receptor (CLR) signaling was largely dispensable, as the absence of MYD88, TRIF, or caspase recruitment domain-containing protein 9 (CARD9) resulted in only minor alterations. However, transcriptome analysis indicated a role for the PI3K-AKT-mTOR pathway in A. fumigatus-induced eosinophil activation. Correspondingly, we could show that phosphatidylinositol 3-kinase (PI3K) inhibitors successfully prevent A. fumigatus-induced eosinophil activation. The PI3K pathway in eosinophils may therefore serve as a potential drug target to interfere with undesired eosinophil activation in fungus-elicited eosinophilic disorders.
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17
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Yu Q, Tu H, Yin X, Peng C, Dou C, Yang W, Wu W, Guan X, Li J, Yan H, Zang Y, Jiang H, Xia Q. Targeting Glutamine Metabolism Ameliorates Autoimmune Hepatitis via Inhibiting T Cell Activation and Differentiation. Front Immunol 2022; 13:880262. [PMID: 35663990 PMCID: PMC9160195 DOI: 10.3389/fimmu.2022.880262] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 04/21/2022] [Indexed: 12/18/2022] Open
Abstract
Background Autoimmune hepatitis (AIH) is mediated by a cascade of T cell-mediated events directed at liver cells and persistent inflammation within the liver can eventually result in liver cirrhosis. Targeting glutamine metabolism has an impact on T cell activation and differentiation. However, the effect of glutamine metabolism blocking upon AIH remains unknown. We use glutaminase antagonist 6-diazo-5-oxo-L-norleucine (DON) for in vitro assays and its prodrug 2-(2-amino-4-methylpentanamido)-DON (JHU083) for in vivo assays to investigate the potential therapeutic effect and molecular mechanism of glutamine metabolism blocking in an AIH murine model. Methods AIH mice were treated with JHU083 or vehicle before concanavalin A (ConA) administration, and disease severity was examined. Then activation and differentiation [including Th1/Th17 cells and cytotoxic T lymphocytes (CTL)] of T cells from Vehicle-WT, JHU083-AIH and Vehicle-AIH mice were tested. Furthermore, in vitro T cell activation and differentiation were measured using separated splenocytes stimulated with ConA with or without DON. The activation and differentiation of T cells were tested using flow cytometry, qRT-PCR and ELISA. Phosphorylation level of mammalian target of rapamycin (mTOR) and 70 kDa ribosomal protein S6 kinase (P70S6K) were examined by western blotting. Results JHU083 and DON significantly suppressed the activation of T cells and inhibited the differentiation of Th1/Th17 cells and CTL in vivo and in vitro. Besides, we demonstrated that glutamine metabolism blocking inhibited T cells activation and differentiation through decreasing the mRNA expression of amino acid transporter solute carrier family 7 member 5 (SLC7A5) and mitigating the activation of mTOR signaling. Conclusions We proved that targeting glutamine metabolism represents a potential new treatment strategy for patients with AIH and other T cell-mediated disease. Mechanistically, we demonstrated that glutamine metabolism blocking inhibits T cells activation and suppresses the differentiation of Th1/Th17 cells and CTL.
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Affiliation(s)
- Qiang Yu
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Honghu Tu
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xueyi Yin
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Chang Peng
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,School of Pharmacy, University of Chinese Academy of Sciences, Beijing, China
| | - Chuanyun Dou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,School of Pharmacy, University of Chinese Academy of Sciences, Beijing, China
| | - Wenhua Yang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Wenbiao Wu
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences (UCAS), Hangzhou, China
| | - Xiaotong Guan
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences (UCAS), Hangzhou, China
| | - Jia Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,School of Pharmacy, University of Chinese Academy of Sciences, Beijing, China
| | - Hexin Yan
- Department of Anesthesia, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yi Zang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences (UCAS), Hangzhou, China
| | - Haowen Jiang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Qiang Xia
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Engineering Research Center of Transplantation and Immunology, Shanghai, China.,Shanghai Institute of Transplantation, Shanghai, China
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18
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Somm E, Jornayvaz FR. Interleukin-18 in metabolism: From mice physiology to human diseases. Front Endocrinol (Lausanne) 2022; 13:971745. [PMID: 36313762 PMCID: PMC9596921 DOI: 10.3389/fendo.2022.971745] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/23/2022] [Indexed: 11/13/2022] Open
Abstract
Interleukin-18 (IL-18) is a classical member of the IL-1 superfamily of cytokines. As IL-1β, IL-18 precursor is processed by inflammasome/caspase-1 into a mature and biologically active form. IL-18 binds to its specific receptor composed of two chains (IL-18Rα and IL-18Rβ) to trigger a similar intracellular signaling pathway as IL-1, ultimately leading to activation of NF-κB and inflammatory processes. Independently of this IL-1-like signaling, IL-18 also specifically induces IFN-γ production, driving the Th1 immune response. In circulation, IL-18 binds to the IL-18 binding protein (IL-18BP) with high affinity, letting only a small fraction of free IL-18 able to trigger receptor-mediated signaling. In contrast to other IL-1 family members, IL-18 is produced constitutively by different cell types, suggesting implications in normal physiology. If the roles of IL-18 in inflammatory processes and infectious diseases are well described, recent experimental studies in mice have highlighted the action of IL-18 signaling in the control of energy homeostasis, pancreatic islet immunity and liver integrity during nutritional stress. At the same time, clinical observations implicate IL-18 in various metabolic diseases including obesity, type 1 and 2 diabetes and nonalcoholic fatty liver disease (NAFLD)/nonalcoholic steatohepatitis (NASH). In the present review, we summarize and discuss both the physiological actions of IL-18 in metabolism and its potential roles in pathophysiological mechanisms leading to the most common human metabolic disorders, such as obesity, diabetes and NAFLD/NASH.
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Affiliation(s)
- Emmanuel Somm
- Service of Endocrinology, Diabetes, Nutrition and Therapeutic Patient Education, Department of Internal Medicine, Geneva University Hospitals, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- *Correspondence: Emmanuel Somm, ; François R. Jornayvaz,
| | - François R. Jornayvaz
- Service of Endocrinology, Diabetes, Nutrition and Therapeutic Patient Education, Department of Internal Medicine, Geneva University Hospitals, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- *Correspondence: Emmanuel Somm, ; François R. Jornayvaz,
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19
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Lv Q, Xing Y, Liu J, Dong D, Liu Y, Qiao H, Zhang Y, Hu L. Lonicerin targets EZH2 to alleviate ulcerative colitis by autophagy-mediated NLRP3 inflammasome inactivation. Acta Pharm Sin B 2021; 11:2880-2899. [PMID: 34589402 PMCID: PMC8463273 DOI: 10.1016/j.apsb.2021.03.011] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 01/08/2021] [Accepted: 02/10/2021] [Indexed: 02/07/2023] Open
Abstract
Aberrant activation of NLRP3 inflammasome in colonic macrophages strongly associates with the occurrence and progression of ulcerative colitis. Although targeting NLRP3 inflammasome has been considered to be a potential therapy, the underlying mechanism through which pathway the intestinal inflammation is modulated remains controversial. By focusing on the flavonoid lonicerin, one of the most abundant constituents existed in a long historical anti-inflammatory and anti-infectious herb Lonicera japonica Thunb., here we report its therapeutic effect on intestinal inflammation by binding directly to enhancer of zeste homolog 2 (EZH2) histone methyltransferase. EZH2-mediated modification of H3K27me3 promotes the expression of autophagy-related protein 5, which in turn leads to enhanced autophagy and accelerates autolysosome-mediated NLRP3 degradation. Mutations of EZH2 residues (His129 and Arg685) indicated by the dynamic simulation study have found to greatly diminish the protective effect of lonicerin. More importantly, in vivo studies verify that lonicerin dose-dependently disrupts the NLRP3–ASC–pro-caspase-1 complex assembly and alleviates colitis, which is compromised by administration of EZH2 overexpression plasmid. Thus, these findings together put forth the stage for further considering lonicerin as an anti-inflammatory epigenetic agent and suggesting EZH2/ATG5/NLRP3 axis may serve as a novel strategy to prevent ulcerative colitis as well as other inflammatory diseases.
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Key Words
- 3-MC, 3-methylcholanthrene
- 5-ASA, 5-aminosalicylic acid
- AIM2, absent in melanoma 2
- ATG5, autophagy-related protein 5
- ATG7, autophagy-related protein 7
- ATP, adenosine triphosphate
- Autophagy
- BMDMs, bone marrow-derived macrophages
- CETSA, cellular thermal shift assay
- CHX, cycloheximide
- ChIP, chromatin immunoprecipitation
- Colitis
- DAI, disease activity index
- DAMPs, damage-associated molecular patterns
- DMSO, dimethyl sulfoxide
- DSS, dextran sulfate sodium
- DTT, dithiothreitol
- ECL, enhanced chemiluminescent
- EDTA, ethylenediaminetetraacetic acid
- ELISA, enzyme-linked immunosorbent assay
- EZH2
- EZH2, enhancer of zeste homolog 2
- FBS, fetal bovine serum
- H&E, hematoxylin and eosin
- LPS, lipopolysaccharide
- Lonicerin
- M-CSF, macrophage colony stimulating factor
- MDP, muramyldipeptide
- MPO, myeloperoxidase
- MSU, monosodium urate crystals
- NLRP3 inflammasome
- NLRP3, nucleotide-binding domain-like receptors family pyrin domain containing 3
- PAMPs, pathogen-associated molecular patterns
- PMA, phorbol myristate acetate
- PMSF, phenylmethanesulfonyl fluoride
- PRC2, polycomb repressive complex 2
- RMSD, root mean-square deviation
- RMSF, root mean-square fluctuation
- SIP, solvent-induced protein precipitation
- TEM, transmission electron microscopy
- UC, ulcerative colitis
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20
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Palmer TM, Salt IP. Nutrient regulation of inflammatory signalling in obesity and vascular disease. Clin Sci (Lond) 2021; 135:1563-1590. [PMID: 34231841 DOI: 10.1042/cs20190768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 06/10/2021] [Accepted: 06/28/2021] [Indexed: 11/17/2022]
Abstract
Despite obesity and diabetes markedly increasing the risk of developing cardiovascular diseases, the molecular and cellular mechanisms that underlie this association remain poorly characterised. In the last 20 years it has become apparent that chronic, low-grade inflammation in obese adipose tissue may contribute to the risk of developing insulin resistance and type 2 diabetes. Furthermore, increased vascular pro-inflammatory signalling is a key event in the development of cardiovascular diseases. Overnutrition exacerbates pro-inflammatory signalling in vascular and adipose tissues, with several mechanisms proposed to mediate this. In this article, we review the molecular and cellular mechanisms by which nutrients are proposed to regulate pro-inflammatory signalling in adipose and vascular tissues. In addition, we examine the potential therapeutic opportunities that these mechanisms provide for suppression of inappropriate inflammation in obesity and vascular disease.
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Affiliation(s)
- Timothy M Palmer
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull HU6 7RX, United Kingdom
| | - Ian P Salt
- Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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21
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Bishop EL, Gudgeon N, Dimeloe S. Control of T Cell Metabolism by Cytokines and Hormones. Front Immunol 2021; 12:653605. [PMID: 33927722 PMCID: PMC8076900 DOI: 10.3389/fimmu.2021.653605] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 03/16/2021] [Indexed: 12/14/2022] Open
Abstract
Dynamic, coordinated changes in metabolic pathway activity underpin the protective and inflammatory activity of T cells, through provision of energy and biosynthetic precursors for effector functions, as well as direct effects of metabolic enzymes, intermediates and end-products on signaling pathways and transcriptional mechanisms. Consequently, it has become increasingly clear that the metabolic status of the tissue microenvironment directly influences T cell activity, with changes in nutrient and/or metabolite abundance leading to dysfunctional T cell metabolism and interlinked immune function. Emerging evidence now indicates that additional signals are integrated by T cells to determine their overall metabolic phenotype, including those arising from interaction with cytokines and hormones in their environment. The impact of these on T cell metabolism, the mechanisms involved and the pathological implications are discussed in this review article.
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Affiliation(s)
| | | | - Sarah Dimeloe
- College of Medical and Dental Sciences, Institute of Immunology and Immunotherapy, Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, United Kingdom
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22
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Papadopoulou G, Xanthou G. Metabolic rewiring: a new master of Th17 cell plasticity and heterogeneity. FEBS J 2021; 289:2448-2466. [PMID: 33794075 DOI: 10.1111/febs.15853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/21/2021] [Accepted: 03/29/2021] [Indexed: 01/04/2023]
Abstract
T helper type 17 (Th17) cells are characterized by inherent plasticity and heterogeneity displaying both pathogenic and tissue-protective functions. Emerging evidence has illuminated a pivotal role for metabolic reprogramming in shaping Th17 cell fate determination. Metabolic responses are regulated by a constellation of factors and environmental triggers, including cytokines, nutrients, oxygen levels, and metabolites. Dysregulation of metabolic pathways not only influences Th17 cell plasticity and effector function but also affects the outcome of Th17-linked autoimmune, inflammatory, and antitumor responses. Understanding the molecular mechanisms underpinning metabolic reprogramming can allow the enhancement of protective Th17 cell-mediated responses during infections and cancer, concomitant with the suppression of detrimental Th17 processes during autoimmune and inflammatory diseases. In the present review, we describe major metabolic pathways underlying the differentiation of Th17 cells and their crosstalk with intracellular signaling mediators, we discuss how metabolic reprogramming affects Th17 cell plasticity and functions, and, finally, we outline current advances in the exploitation of metabolic checkpoints for the development of novel therapeutic interventions for the management of tissue inflammation, autoimmune disorders, and cancer.
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Affiliation(s)
- Gina Papadopoulou
- Cellular Immunology Laboratory, Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, Greece.,Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Greece
| | - Georgina Xanthou
- Cellular Immunology Laboratory, Center for Basic Research, Biomedical Research Foundation of the Academy of Athens, Greece
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23
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Guo K, Zhang X. Cytokines that Modulate the Differentiation of Th17 Cells in Autoimmune Uveitis. J Immunol Res 2021; 2021:6693542. [PMID: 33816637 PMCID: PMC7990547 DOI: 10.1155/2021/6693542] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/01/2021] [Accepted: 03/04/2021] [Indexed: 02/06/2023] Open
Abstract
Increasing evidence has suggested that T helper 17 (Th17) cells play a central role in the pathogenesis of ocular immune disease. The association between pathogenic Th17 cells and the development of uveitis has been confirmed in experimental and clinical studies. Several cytokines affect the initiation and stabilization of the differentiation of Th17 cells. Therefore, understanding the mechanism of related cytokines in the differentiation of Th17 cells is important for exploring the pathogenesis and the potential therapeutic targets of uveitis. This article briefly describes the structures, mechanisms, and targeted drugs of cytokines-including interleukin (IL)-6, transforming growth factor-β1 (TGF-β1), IL-1β, IL-23, IL-27, IL-35, IL-2, IL-4, IL-21, and interferon (IFN)-γ-which have an important influence on the differentiation of Th17 cells and discusses their potential as therapeutic targets for treating autoimmune uveitis.
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Affiliation(s)
- Kailei Guo
- Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin 300384, China
| | - Xiaomin Zhang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin 300384, China
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24
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Luff DH, Wojdyla K, Oxley D, Chessa T, Hudson K, Hawkins PT, Stephens LR, Barry ST, Okkenhaug K. PI3Kδ Forms Distinct Multiprotein Complexes at the TCR Signalosome in Naïve and Differentiated CD4 + T Cells. Front Immunol 2021; 12:631271. [PMID: 33763075 PMCID: PMC7982423 DOI: 10.3389/fimmu.2021.631271] [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: 11/19/2020] [Accepted: 02/02/2021] [Indexed: 11/14/2022] Open
Abstract
Phosphoinositide 3-kinases (PI3Ks) play a central role in adaptive immunity by transducing signals from the T cell antigen receptor (TCR) via production of PIP3. PI3Kδ is a heterodimer composed of a p110δ catalytic subunit associated with a p85α or p85β regulatory subunit and is preferentially engaged by the TCR upon T cell activation. The molecular mechanisms leading to PI3Kδ recruitment and activation at the TCR signalosome remain unclear. In this study, we have used quantitative mass spectrometry, biochemical approaches and CRISPR-Cas9 gene editing to uncover the p110δ interactome in primary CD4+ T cells. Moreover, we have determined how the PI3Kδ interactome changes upon the differentiation of small naïve T cells into T cell blasts expanded in the presence of IL-2. Our interactomic analyses identified multiple constitutive and inducible PI3Kδ-interacting proteins, some of which were common to naïve and previously-activated T cells. Our data reveals that PI3Kδ rapidly interacts with as many as seven adaptor proteins upon TCR engagement, including the Gab-family proteins, GAB2 and GAB3, a CD5-CBL signalosome and the transmembrane proteins ICOS and TRIM. Our results also suggest that PI3Kδ pre-forms complexes with the adaptors SH3KBP1 and CRKL in resting cells that could facilitate the localization and activation of p110δ at the plasma membrane by forming ternary complexes during early TCR signalling. Furthermore, we identify interactions that were not previously known to occur in CD4+ T cells, involving BCAP, GAB3, IQGAP3 and JAML. We used CRISPR-Cas9-mediated gene knockout in primary T cells to confirm that BCAP is a positive regulator of PI3K-AKT signalling in CD4+ T cell blasts. Overall, our results provide evidence for a large protein network that regulates the recruitment and activation of PI3Kδ in T cells. Finally, this work shows how the PI3Kδ interactome is remodeled as CD4+ T cells differentiate from naïve T cells to activated T cell blasts. These activated T cells upregulate additional PI3Kδ adaptor proteins, including BCAP, GAB2, IQGAP3 and ICOS. This rewiring of TCR-PI3K signalling that occurs upon T cell differentiation may serve to reduce the threshold of activation and diversify the inputs for the PI3K pathway in effector T cells.
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Affiliation(s)
- Daisy H Luff
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, United Kingdom
| | - Katarzyna Wojdyla
- Mass Spectrometry Facility, The Babraham Institute, Cambridge, United Kingdom.,Signalling Programme, The Babraham Institute, Cambridge, United Kingdom
| | - David Oxley
- Mass Spectrometry Facility, The Babraham Institute, Cambridge, United Kingdom
| | - Tamara Chessa
- Signalling Programme, The Babraham Institute, Cambridge, United Kingdom
| | - Kevin Hudson
- Bioscience, Oncology R&D, AstraZeneca, Cambridge, United Kingdom
| | - Phillip T Hawkins
- Signalling Programme, The Babraham Institute, Cambridge, United Kingdom
| | - Len R Stephens
- Signalling Programme, The Babraham Institute, Cambridge, United Kingdom
| | - Simon T Barry
- Bioscience, Oncology R&D, AstraZeneca, Cambridge, United Kingdom
| | - Klaus Okkenhaug
- Department of Pathology, University of Cambridge, Cambridge, United Kingdom
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25
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Van Den Eeckhout B, Tavernier J, Gerlo S. Interleukin-1 as Innate Mediator of T Cell Immunity. Front Immunol 2021; 11:621931. [PMID: 33584721 PMCID: PMC7873566 DOI: 10.3389/fimmu.2020.621931] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/08/2020] [Indexed: 12/19/2022] Open
Abstract
The three-signal paradigm tries to capture how the innate immune system instructs adaptive immune responses in three well-defined actions: (1) presentation of antigenic peptides in the context of MHC molecules, which allows for a specific T cell response; (2) T cell co-stimulation, which breaks T cell tolerance; and (3) secretion of polarizing cytokines in the priming environment, thereby specializing T cell immunity. The three-signal model provides an empirical framework for innate instruction of adaptive immunity, but mainly discusses STAT-dependent cytokines in T cell activation and differentiation, while the multi-faceted roles of type I IFNs and IL-1 cytokine superfamily members are often neglected. IL-1α and IL-1β are pro-inflammatory cytokines, produced following damage to the host (release of DAMPs) or upon innate recognition of PAMPs. IL-1 activity on both DCs and T cells can further shape the adaptive immune response with variable outcomes. IL-1 signaling in DCs promotes their ability to induce T cell activation, but also direct action of IL-1 on both CD4+ and CD8+ T cells, either alone or in synergy with prototypical polarizing cytokines, influences T cell differentiation under different conditions. The activities of IL-1 form a direct bridge between innate and adaptive immunity and could therefore be clinically translatable in the context of prophylactic and therapeutic strategies to empower the formation of T cell immunity. Understanding the modalities of IL-1 activity during T cell activation thus could hold major implications for rational development of the next generation of vaccine adjuvants.
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Affiliation(s)
- Bram Van Den Eeckhout
- VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Jan Tavernier
- VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- Orionis Biosciences BV, Ghent, Belgium
| | - Sarah Gerlo
- VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
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26
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Irizarry-Caro RA, McDaniel MM, Overcast GR, Jain VG, Troutman TD, Pasare C. TLR signaling adapter BCAP regulates inflammatory to reparatory macrophage transition by promoting histone lactylation. Proc Natl Acad Sci U S A 2020; 117:30628-30638. [PMID: 33199625 PMCID: PMC7720107 DOI: 10.1073/pnas.2009778117] [Citation(s) in RCA: 139] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Macrophages respond to microbial ligands and various noxious cues by initiating an inflammatory response aimed at eliminating the original pathogenic insult. Transition of macrophages from a proinflammatory state to a reparative state, however, is vital for resolution of inflammation and return to homeostasis. The molecular players governing this transition remain poorly defined. Here, we find that the reparative macrophage transition is dictated by B-cell adapter for PI3K (BCAP). Mice harboring a macrophage-specific deletion of BCAP fail to recover from and succumb to dextran sulfate sodium-induced colitis due to prolonged intestinal inflammation and impaired tissue repair. Following microbial stimulation, gene expression in WT macrophages switches from an early inflammatory signature to a late reparative signature, a process that is hampered in BCAP-deficient macrophages. We find that absence of BCAP hinders inactivation of FOXO1 and GSK3β, which contributes to their enhanced inflammatory state. BCAP deficiency also results in defective aerobic glycolysis and reduced lactate production. This translates into reduced histone lactylation and decreased expression of reparative macrophage genes. Thus, our results reveal BCAP to be a critical cell-intrinsic switch that regulates transition of inflammatory macrophages to reparative macrophages by imprinting epigenetic changes.
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Affiliation(s)
- Ricardo A Irizarry-Caro
- Immunology Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX 75390
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
- Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Margaret M McDaniel
- Immunology Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX 75390
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
- Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Garrett R Overcast
- Immunology Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX 75390
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
- Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Viral G Jain
- Division of Neonatology, University of Alabama at Birmingham, Birmingham, AL 35233
| | - Ty Dale Troutman
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093
| | - Chandrashekhar Pasare
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229;
- Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267
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27
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Molecularly Distinct NLRP3 Inducers Mediate Diverse Ratios of Interleukin-1 β and Interleukin-18 from Human Monocytes. Mediators Inflamm 2020; 2020:4651090. [PMID: 33144845 PMCID: PMC7599400 DOI: 10.1155/2020/4651090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/10/2020] [Accepted: 09/29/2020] [Indexed: 11/17/2022] Open
Abstract
Inflammasomes cleave and activate interleukin- (IL-) 1β and IL-18 which have both shared and unique biological functions. IL-1β is an important mediator of the acute phase response to infections and tissue damage, whereas IL-18 takes part in activation and tailoring of the adaptive immune response. While IL-1β has served as the prototypic indicator of inflammasome activation, few studies have compared the potential differences in IL-1β and IL-18 production during inflammasome activation. Since these cytokines partake in different immune pathways, the involvement of inflammasome activity in different conditions needs to be described beyond IL-1β production alone. To address a potential heterogeneity in inflammasome functionality, ATP, chitosan, or silica oxide (SiO2) were used to induce NLRP3 inflammasome activation in THP-1 cells and the subsequent outcomes were quantified. Despite using doses of the inflammasome inducers yielding similar release of IL-1β, SiO2-stimulated cells showed a lower concentration of released IL-18 compared to ATP and chitosan. Hence, the cells stimulated with SiO2 responded with a distinctly different IL-18 : IL-1β ratio. The difference in the IL-18 : IL-1β ratio for SiO2 was constant over different doses. While all downstream responses were strictly dependent on a functional NLRP3 inflammasome, the differences did not depend on the level of gene expression, caspase-1 activity, or pyroptosis. We suggest that the NLRP3 inflammasome response should be considered a dynamic process, which can be described by taking the ratio between IL-1β and IL-18 into account and moving away from an on/off perspective of inflammasome activation.
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28
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Abstract
Virtually all aspects of T and B lymphocyte development, homeostasis, activation, and effector function are impacted by the interaction of their clonally distributed antigen receptors with antigens encountered in their respective environments. Antigen receptors mediate their effects by modulating intracellular signaling pathways that ultimately impinge on the cytoskeleton, bioenergetic pathways, transcription, and translation. Although these signaling pathways are rather well described at this point, especially those steps that are most receptor-proximal, how such pathways contribute to more quantitative aspects of lymphocyte function is still being elucidated. One of the signaling pathways that appears to be involved in this “tuning” process is controlled by the lipid kinase PI3K. Here we review recent key findings regarding both the triggering/enhancement of PI3K signals (via BCAP and ICOS) as well as their regulation (via PIK3IP1 and PHLPP) and how these signals integrate and determine cellular processes. Lymphocytes display tremendous functional plasticity, adjusting their metabolism and gene expression programs to specific conditions depending on their tissue of residence and the nature of the infectious threat to which they are responding. We give an overview of recent findings that have contributed to this model, with a focus on T cells, including what has been learned from patients with gain-of-function mutations in PI3K as well as lessons from cancer immunotherapy approaches.
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Affiliation(s)
- Benjamin Murter
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
| | - Lawrence P Kane
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
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29
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Villegas-Mendez A, Khandelwal G, McGowan LM, Dookie RS, Haley MJ, George C, Sims D, Lord GM, Sinclair LV, Jenner RG, Couper KN. Exhausted CD4 + T Cells during Malaria Exhibit Reduced mTORc1 Activity Correlated with Loss of T-bet Expression. THE JOURNAL OF IMMUNOLOGY 2020; 205:1608-1619. [PMID: 32817333 PMCID: PMC7477746 DOI: 10.4049/jimmunol.2000450] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 07/14/2020] [Indexed: 01/21/2023]
Abstract
CD4+ T cell functional inhibition (exhaustion) is a hallmark of malaria and correlates with impaired parasite control and infection chronicity. However, the mechanisms of CD4+ T cell exhaustion are still poorly understood. In this study, we show that Ag-experienced (Ag-exp) CD4+ T cell exhaustion during Plasmodium yoelii nonlethal infection occurs alongside the reduction in mammalian target of rapamycin (mTOR) activity and restriction in CD4+ T cell glycolytic capacity. We demonstrate that the loss of glycolytic metabolism and mTOR activity within the exhausted Ag-expCD4+ T cell population during infection coincides with reduction in T-bet expression. T-bet was found to directly bind to and control the transcription of various mTOR and metabolism-related genes within effector CD4+ T cells. Consistent with this, Ag-expTh1 cells exhibited significantly higher and sustained mTOR activity than effector T-bet- (non-Th1) Ag-expT cells throughout the course of malaria. We identified mTOR to be redundant for sustaining T-bet expression in activated Th1 cells, whereas mTOR was necessary but not sufficient for maintaining IFN-γ production by Th1 cells. Immunotherapy targeting PD-1, CTLA-4, and IL-27 blocked CD4+ T cell exhaustion during malaria infection and was associated with elevated T-bet expression and a concomitant increased CD4+ T cell glycolytic metabolism. Collectively, our data suggest that mTOR activity is linked to T-bet in Ag-expCD4+ T cells but that reduction in mTOR activity may not directly underpin Ag-expTh1 cell loss and exhaustion during malaria infection. These data have implications for therapeutic reactivation of exhausted CD4+ T cells during malaria infection and other chronic conditions.
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Affiliation(s)
- Ana Villegas-Mendez
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, United Kingdom
| | - Garima Khandelwal
- University College London Cancer Institute, University College London, London WC1E 6DD, United Kingdom
| | - Lucy M McGowan
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, United Kingdom.,Department of Physiology, Pharmacology and Neuroscience, Faculty of Life Sciences, University of Bristol, Bristol BS8 1TD, United Kingdom
| | - Rebecca S Dookie
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, United Kingdom
| | - Michael J Haley
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, United Kingdom
| | - Charlotte George
- Oxford Biomedical Data Science Training Programme, Medical Research Council Wetherall Institute of Molecular Medicine Centre for Computational Biology, Medical Research Council Wetherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, United Kingdom; and
| | - David Sims
- Oxford Biomedical Data Science Training Programme, Medical Research Council Wetherall Institute of Molecular Medicine Centre for Computational Biology, Medical Research Council Wetherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, United Kingdom; and
| | - Graham M Lord
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, United Kingdom
| | - Linda V Sinclair
- Division of Cell Signaling and Immunology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Richard G Jenner
- University College London Cancer Institute, University College London, London WC1E 6DD, United Kingdom
| | - Kevin N Couper
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, United Kingdom;
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30
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Lovšin E, Kovač J, Tesovnik T, Toplak N, Perko D, Rozmarič T, Debeljak M, Avčin T. PIK3AP1 and SPON2 Genes Are Differentially Methylated in Patients With Periodic Fever, Aphthous Stomatitis, Pharyngitis, and Adenitis (PFAPA) Syndrome. Front Immunol 2020; 11:1322. [PMID: 32793186 PMCID: PMC7390842 DOI: 10.3389/fimmu.2020.01322] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/26/2020] [Indexed: 12/22/2022] Open
Abstract
Periodic fever, aphthous stomatitis, pharyngitis, and adenitis (PFAPA) syndrome is the most common autoinflammatory disease in children and is often grouped together with hereditary periodic fever syndromes, although its cause and hereditary nature remain unexplained. We investigated whether differential DNA methylation was present in DNA from peripheral blood mononuclear cells (PBMC) in patients with PFAPA vs. healthy controls. A whole-epigenome analysis (MeDIP and MBD) was performed using pooled DNA libraries enriched for methylated genomic regions and identified candidate genes, two of which were further evaluated with methylation-specific restriction enzymes coupled with qPCR (MSRE-qPCR). The analysis showed that the PIK3AP1 and SPON2 gene regions are differentially methylated in patients with PFAPA. MSRE-qPCR proved to be a quick, reliable, and cost-effective method of confirming results from MeDIP and MBD. Our findings indicate that a B-cell adapter protein (PIK3AP1), as the PI3K binding inhibitor of inflammation, and spondin-2 (SPON2), as a pattern recognition molecule and integrin ligand, could play a role in the etiology of PFAPA. Their role and the impact of changed DNA methylation in PFAPA etiology and autoinflammation need further investigation.
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Affiliation(s)
- Ema Lovšin
- Department of Allergology, Rheumatology and Clinical Immunology, University Medical Centre Ljubljana, University Children's Hospital, Ljubljana, Slovenia.,Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Jernej Kovač
- Department for Special Laboratory Diagnostics, University Medical Centre Ljubljana, University Children's Hospital, Ljubljana, Slovenia
| | - Tine Tesovnik
- Department for Special Laboratory Diagnostics, University Medical Centre Ljubljana, University Children's Hospital, Ljubljana, Slovenia
| | - Nataša Toplak
- Department of Allergology, Rheumatology and Clinical Immunology, University Medical Centre Ljubljana, University Children's Hospital, Ljubljana, Slovenia.,Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Daša Perko
- Department for Special Laboratory Diagnostics, University Medical Centre Ljubljana, University Children's Hospital, Ljubljana, Slovenia
| | - Tomaž Rozmarič
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria
| | - Maruša Debeljak
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.,Department for Special Laboratory Diagnostics, University Medical Centre Ljubljana, University Children's Hospital, Ljubljana, Slovenia
| | - Tadej Avčin
- Department of Allergology, Rheumatology and Clinical Immunology, University Medical Centre Ljubljana, University Children's Hospital, Ljubljana, Slovenia.,Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
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31
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Sanchez-Garrido J, Shenoy AR. Regulation and repurposing of nutrient sensing and autophagy in innate immunity. Autophagy 2020; 17:1571-1591. [PMID: 32627660 PMCID: PMC8354595 DOI: 10.1080/15548627.2020.1783119] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Nutrients not only act as building blocks but also as signaling molecules. Nutrient-availability promotes cell growth and proliferation and suppresses catabolic processes, such as macroautophagy/autophagy. These effects are mediated by checkpoint kinases such as MTOR (mechanistic target of rapamycin kinase), which is activated by amino acids and growth factors, and AMP-activated protein kinase (AMPK), which is activated by low levels of glucose or ATP. These kinases have wide-ranging activities that can be co-opted by immune cells upon exposure to danger signals, cytokines or pathogens. Here, we discuss recent insight into the regulation and repurposing of nutrient-sensing responses by the innate immune system during infection. Moreover, we examine how natural mutations and pathogen-mediated interventions can alter the balance between anabolic and autophagic pathways leading to a breakdown in tissue homeostasis and/or host defense.Abbreviations: AKT1/PKB: AKT serine/threonine kinase 1; ATG: autophagy related; BECN1: beclin 1; CGAS: cyclic GMP-AMP synthase; EIF2AK4/GCN2: eukaryotic translation initiation factor 2 alpha kinase 4; ER: endoplasmic reticulum; FFAR: free fatty acid receptor; GABARAP: GABA type A receptor-associated protein; IFN: interferon; IL: interleukin; LAP: LC3-associated phagocytosis; MAP1LC3B/LC3B: microtubule associated protein 1 light chain 3 beta; MAP3K7/TAK1: mitogen-activated protein kinase kinase kinase 7; MAPK: mitogen-activated protein kinase; MTOR: mechanistic target of rapamycin kinase; NLR: NOD (nucleotide-binding oligomerization domain) and leucine-rich repeat containing proteins; PI3K, phosphoinositide 3-kinase; PRR: pattern-recognition receptor; PtdIns3K: phosphatidylinositol 3-kinase; RALB: RAS like proto-oncogene B; RHEB: Ras homolog, MTORC1 binding; RIPK1: receptor interacting serine/threonine kinase 1; RRAG: Ras related GTP binding; SQSTM1/p62: sequestosome 1; STING1/TMEM173: stimulator of interferon response cGAMP interactor 1; STK11/LKB1: serine/threonine kinase 11; TBK1: TANK binding kinase 1; TLR: toll like receptor; TNF: tumor necrosis factor; TRAF6: TNF receptor associated factor 6; TRIM: tripartite motif protein; ULK1: unc-51 like autophagy activating kinase 1; V-ATPase: vacuolar-type H+-proton-translocating ATPase.
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Affiliation(s)
- Julia Sanchez-Garrido
- Medical Research Council Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK
| | - Avinash R Shenoy
- Medical Research Council Centre for Molecular Bacteriology and Infection, Imperial College London, London, UK.,Satellite Group Leader, The Francis Crick Institute, London, UK
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32
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Lauenstein JU, Scherm MJ, Udgata A, Moncrieffe MC, Fisher DI, Gay NJ. Negative Regulation of TLR Signaling by BCAP Requires Dimerization of Its DBB Domain. THE JOURNAL OF IMMUNOLOGY 2020; 204:2269-2276. [PMID: 32198144 PMCID: PMC7128310 DOI: 10.4049/jimmunol.1901210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 01/31/2020] [Indexed: 01/12/2023]
Abstract
Dimerization of the BCAP Toll/IL1 domain is required for function. BCAP TIR modulates the oligomerization state of TLR signaling adaptor MAL. TIG domains are a promiscuous dimerization module in gene expression and signaling.
The B cell adaptor protein (BCAP) is a multimodular regulator of inflammatory signaling in diverse immune system cells. BCAP couples TLR signaling to phosphoinositide metabolism and inhibits MyD88-directed signal transduction. BCAP is recruited to the TLR signalosome forming multitypic interactions with the MAL and MyD88 signaling adaptors. In this study, we show that indirect dimerization of BCAP TIR is required for negative regulation of TLR signaling. This regulation is mediated by a transcription factor Ig (TIG/IPT) domain, a fold found in the NF-κB family of transcription factors. We have solved the crystal structure of the BCAP TIG and find that it is most similar to that of early B cell factor 1 (EBF1). In both cases, the dimer is stabilized by a helix-loop-helix motif at the C terminus and interactions between the β-sheets of the Ig domains. BCAP is exclusively localized in the cytosol and is unable to bind DNA. Thus, the TIG domain is a promiscuous dimerization module that has been appropriated for a range of regulatory functions in gene expression and signal transduction.
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Affiliation(s)
- Johannes U Lauenstein
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom; and
| | - Michael J Scherm
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom; and
| | - Atul Udgata
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom; and
| | - Martin C Moncrieffe
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom; and
| | - David I Fisher
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, United Kingdom
| | - Nicholas J Gay
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom; and
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Miao Y, Jiang M, Qi L, Yang D, Xiao W, Fang F. BCAP Regulates Dendritic Cell Maturation Through the Dual-Regulation of NF-κB and PI3K/AKT Signaling During Infection. Front Immunol 2020; 11:250. [PMID: 32133012 PMCID: PMC7040100 DOI: 10.3389/fimmu.2020.00250] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 01/30/2020] [Indexed: 12/20/2022] Open
Abstract
The maturation of dendritic cells (DCs) is essential in adaptive immunity. B cell adapter for phosphoinositide 3-kinase (BCAP) has been shown a divergent activities in cell type dependent manner including B cells, NK cells, macrophages, and plasmacytoid DCs (pDCs), however, its role in conventional DCs (cDCs) remains unknown. Here, we report that BCAP negatively regulates Toll-like receptor-induced cDC maturation and inhibits cDCs from inducing antigen-specific T cell responses, thereby weakening the antibacterial adaptive immune responses of mice in a Listeria monocytogenes-infection model. Furthermore, we demonstrate that BCAP simultaneously modulates the activation of the NF-κB and PI3K/AKT signaling by dynamically interacting with, respectively, MyD88 and the p85α subunit of PI3K. Our study thus reveals non-redundant roles for BCAP in regulating cDC maturation and reveals a bilateral signal transduction mechanism.
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Affiliation(s)
- Yuhui Miao
- Department of Medical Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.,Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, China.,Institute of Immunology, University of Science and Technology of China, Hefei, China.,Engineering Technology Research Center of Biotechnology Drugs Anhui, University of Science and Technology of China, Hefei, China
| | - Ming Jiang
- Department of Medical Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.,Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, China.,Institute of Immunology, University of Science and Technology of China, Hefei, China.,Engineering Technology Research Center of Biotechnology Drugs Anhui, University of Science and Technology of China, Hefei, China
| | - Lu Qi
- Department of Medical Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.,Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, China.,Institute of Immunology, University of Science and Technology of China, Hefei, China.,Engineering Technology Research Center of Biotechnology Drugs Anhui, University of Science and Technology of China, Hefei, China
| | - De Yang
- Cancer and Inflammation Program, Frederick National Laboratory for Cancer Research, Center for Cancer Research, National Cancer Institute, Frederick, MD, United States
| | - Weihua Xiao
- Department of Medical Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.,Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, China.,Institute of Immunology, University of Science and Technology of China, Hefei, China.,Engineering Technology Research Center of Biotechnology Drugs Anhui, University of Science and Technology of China, Hefei, China
| | - Fang Fang
- Department of Medical Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.,Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences, University of Science and Technology of China, Hefei, China.,Institute of Immunology, University of Science and Technology of China, Hefei, China.,Engineering Technology Research Center of Biotechnology Drugs Anhui, University of Science and Technology of China, Hefei, China
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34
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Wu B, Wan Y. Molecular control of pathogenic Th17 cells in autoimmune diseases. Int Immunopharmacol 2020; 80:106187. [PMID: 31931372 DOI: 10.1016/j.intimp.2020.106187] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/02/2020] [Accepted: 01/02/2020] [Indexed: 12/11/2022]
Abstract
IL-17A-producing CD4+ T helper cells (Th17) are crucial for the development of inflammatory and autoimmune diseases and thus are exploited for clinical immunotherapies. Emerging evidence suggests Th17 cells are heterogeneous and able to adopt both pathogenic and non-pathogenic phenotypes which are shaped by environmental and genetic factors. On one hand, IL-6 in concert with TGFβ1 can induce non-pathogenic Th17 cells (non-pTh17), which are not effective in inducing tissue inflammation. On the other hand, IL-6, IL-1β with IL-23 induce pathogenic Th17 cells (pTh17) to induce immune pathologies in various tissues. Th17 cells could be both pathogenic and non-pathogenic in a content-dependent manner in vivo. Understanding how the generation and pathogenicity of pTh17 cells are regulated will aid us to devise more effective immunotherapy. In this review, we summarize recent advances in the differentiation and regulation of Th17 cells especially pTh17 cells in vitro and in vivo. The emerging results revealing the specific molecular control of pTh17 cells are highlighted.
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Affiliation(s)
- Bing Wu
- Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, School of Medicine, University of North Carolina at Chapel Hill, NC 27599, USA.
| | - Yisong Wan
- Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, School of Medicine, University of North Carolina at Chapel Hill, NC 27599, USA.
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35
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Rex DAB, Agarwal N, Prasad TSK, Kandasamy RK, Subbannayya Y, Pinto SM. A comprehensive pathway map of IL-18-mediated signalling. J Cell Commun Signal 2019; 14:257-266. [PMID: 31863285 DOI: 10.1007/s12079-019-00544-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 12/06/2019] [Indexed: 02/07/2023] Open
Abstract
Interleukin-18 (IL-18) is a member of the IL-1 family of cytokines and was initially described as an IFN-γ-inducing factor derived from anti-CD3-stimulated T-helper (Th)1 cells. IL-18 plays a significant role in the activation of hematopoietic cell types mediating both Th1 and Th2 responses and is the primary inducer of interferon-γ in these cells. The biological activity of IL-18 is mediated through its binding to the IL-18 receptor complex and activation of nuclear factor-κB (NF-κB), culminating in the production and release of several cytokines, chemokines, and cellular adhesion molecules. In certain cell types, IL-18 also activates mitogen-activated protein kinases (MAPKs) and phosphoinositide 3-kinase/ AKT serine/threonine kinase (PI3K/AKT) signaling modules leading to the production and release of proinflammatory cytokines. IL-18-mediated signaling acts as one of the vital components of the immunomodulatory cytokine networks involved in host defense, inflammation, and tissue regeneration. Albeit its biomedical importance, a comprehensive resource of IL-18 mediated signaling pathway is currently lacking. In this study, we report on the development of an integrated pathway map of IL-18/IL-18R signaling. The pathway map was developed through literature mining from published literature based on manual curation guidelines adapted from NetPath and includes information on 16 protein-protein interaction events, 38 enzyme-catalysis events, 12 protein translocation events, 26 activations/inhibition events, transcriptional regulators, 230 gene regulation events and 84 induced protein expression events. The IL-18 signaling pathway can be freely accessed through the WikiPathways database (https://www.wikipathways.org/index.php/Pathway:WP4754).
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Affiliation(s)
- D A B Rex
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India
| | - Nupur Agarwal
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India
| | - T S Keshava Prasad
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India
| | - Richard K Kandasamy
- Centre of Molecular Inflammation Research (CEMIR), and Department of Clinical and Molecular Medicine (IKOM), Norwegian University of Science and Technology, N-7491, Trondheim, Norway
| | - Yashwanth Subbannayya
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India. .,Centre of Molecular Inflammation Research (CEMIR), and Department of Clinical and Molecular Medicine (IKOM), Norwegian University of Science and Technology, N-7491, Trondheim, Norway.
| | - Sneha M Pinto
- Center for Systems Biology and Molecular Medicine, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, India. .,Centre of Molecular Inflammation Research (CEMIR), and Department of Clinical and Molecular Medicine (IKOM), Norwegian University of Science and Technology, N-7491, Trondheim, Norway.
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36
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Cibrian D, Castillo-González R, Fernández-Gallego N, de la Fuente H, Jorge I, Saiz ML, Punzón C, Ramírez-Huesca M, Vicente-Manzanares M, Fresno M, Daudén E, Fraga-Fernandez J, Vazquez J, Aragonés J, Sánchez-Madrid F. Targeting L-type amino acid transporter 1 in innate and adaptive T cells efficiently controls skin inflammation. J Allergy Clin Immunol 2019; 145:199-214.e11. [PMID: 31605740 DOI: 10.1016/j.jaci.2019.09.025] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 09/09/2019] [Accepted: 09/16/2019] [Indexed: 12/20/2022]
Abstract
BACKGROUND Psoriasis is a frequent inflammatory skin disease that is mainly mediated by IL-23, IL-1β, and IL-17 cytokines. Although psoriasis is a hyperproliferative skin disorder, the possible role of amino acid transporters has remained unexplored. OBJECTIVE We sought to investigate the role of the essential amino acid transporter L-type amino acid transporter (LAT) 1 (SLC7A5) in psoriasis. METHODS LAT1 floxed mice were crossed to Cre-expressing mouse strains under the control of keratin 5, CD4, and retinoic acid receptor-related orphan receptor γ. We produced models of skin inflammation induced by imiquimod (IMQ) and IL-23 and tested the effect of inhibiting LAT1 (JPH203) and mammalian target of rapamycin (mTOR [rapamycin]). RESULTS LAT1 expression is increased in keratinocytes and skin-infiltrating lymphocytes of psoriatic lesions in human subjects and mice. LAT1 deletion in keratinocytes does not dampen the inflammatory response or their proliferation, which could be maintained by increased expression of the alternative amino acid transporters LAT2 and LAT3. Specific deletion of LAT1 in γδ and CD4 T cells controls the inflammatory response induced by IMQ. LAT1 deletion or inhibition blocks expansion of IL-17-secreting γ4+δ4+ and CD4 T cells and dampens the release of IL-1β, IL-17, and IL-22 in the IMQ-induced model. Moreover, inhibition of LAT1 blocks expansion of human γδ T cells and IL-17 secretion by human CD4 T cells. IL-23 and IL-1β stimulation upregulates LAT1 expression and induces mTOR activation in IL-17+ γδ and TH17 cells. Deletion or inhibition of LAT1 efficiently controls IL-23- and IL-1β-induced phosphatidylinositol 3-kinase/AKT/mTOR activation independent of T-cell receptor signaling. CONCLUSION Targeting LAT1-mediated amino acid uptake is a potentially useful immunosuppressive strategy to control skin inflammation mediated by the IL-23/IL-1β/IL-17 axis.
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Affiliation(s)
- Danay Cibrian
- Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid (UAM), Madrid, Spain; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain; CIBER de Enfermedades Cardiovasculares, Carlos III Health Institute, Madrid, Spain
| | - Raquel Castillo-González
- Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid (UAM), Madrid, Spain; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Nieves Fernández-Gallego
- Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid (UAM), Madrid, Spain; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Hortensia de la Fuente
- Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid (UAM), Madrid, Spain; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain; CIBER de Enfermedades Cardiovasculares, Carlos III Health Institute, Madrid, Spain
| | - Inmaculada Jorge
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain; CIBER de Enfermedades Cardiovasculares, Carlos III Health Institute, Madrid, Spain
| | - María Laura Saiz
- Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid (UAM), Madrid, Spain; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Carmen Punzón
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | | | - Miguel Vicente-Manzanares
- Centro de Investigación del Cáncer-Instituto de Biología Molecular y Celular del Cáncer, CIC-IBMCC (CSIC-Universidad de Salamanca), Salamanca, Spain
| | - Manuel Fresno
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Esteban Daudén
- Dermatology Service, Hospital de la Princesa, Madrid, Spain
| | | | - Jesús Vazquez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain; CIBER de Enfermedades Cardiovasculares, Carlos III Health Institute, Madrid, Spain
| | - Julián Aragonés
- CIBER de Enfermedades Cardiovasculares, Carlos III Health Institute, Madrid, Spain; Reasearch Unit, Hospital de La Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid, Madrid, Spain
| | - Francisco Sánchez-Madrid
- Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid (UAM), Madrid, Spain; Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain; CIBER de Enfermedades Cardiovasculares, Carlos III Health Institute, Madrid, Spain.
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37
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Lauenstein JU, Udgata A, Bartram A, De Sutter D, Fisher DI, Halabi S, Eyckerman S, Gay NJ. Phosphorylation of the multifunctional signal transducer B-cell adaptor protein (BCAP) promotes recruitment of multiple SH2/SH3 proteins including GRB2. J Biol Chem 2019; 294:19852-19861. [PMID: 31527084 PMCID: PMC6937578 DOI: 10.1074/jbc.ra119.009931] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/10/2019] [Indexed: 12/21/2022] Open
Abstract
B-cell adaptor protein (BCAP) is a multimodular, multifunctional signal transducer that regulates signal transduction pathways in leukocytes, including macrophages, B-cells, and T-cells. In particular, BCAP suppresses inflammatory signaling by Toll-like receptors (TLRs). However, how BCAP itself is regulated and what its interaction partners are is unclear. Here, using human immune cell lines, including THP-1 cells, we characterized the complex phosphorylation patterns of BCAP and used a novel protein complex trapping strategy, called virotrap, to identify its interaction partners. This analysis identified known interactions of BCAP with phosphoinositide 3-kinase (PI3K) p85 subunit and NCK adaptor protein (NCK), together with previously unknown interactions of BCAP with Src homology 2 (SH2) and SH3 domain-containing adaptor proteins, notably growth factor receptor-bound protein 2 (GRB2) and CRK-like proto-oncogene, adaptor protein (CRKL). We show that the SH3 domain of GRB2 can bind to BCAP independently of BCAP phosphorylation status, suggesting that the SH2 domains mediate interactions with activated receptor tyrosine kinase complexes including the CD19 subunit of the B-cell receptor. Our results also suggested that the PI3K p85 subunit binds to BCAP via SH3 domains forming an inactive complex that is then activated by sequential binding with the SH2 domains. Taken together, our results indicate that BCAP is a complex hub that processes signals from multiple pathways in diverse cell types of the immune system.
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Affiliation(s)
- Johannes U Lauenstein
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom
| | - Atul Udgata
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom
| | - Alex Bartram
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom
| | - Delphine De Sutter
- Department of Biomolecular Medicine, Ghent University, VIB Center for Medical Biotechnology, VIB, A. Baertsoenkaai 3, Ghent B-9000, Belgium
| | - David I Fisher
- Discovery Sciences, Discovery Biology, IMED Biotech Unit, AstraZeneca, Cambridge CB4 0WG, United Kingdom
| | - Samer Halabi
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom
| | - Sven Eyckerman
- Department of Biomolecular Medicine, Ghent University, VIB Center for Medical Biotechnology, VIB, A. Baertsoenkaai 3, Ghent B-9000, Belgium
| | - Nicholas J Gay
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom
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38
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Chen Y, Wang J, Wang X, Li X, Song J, Fang J, Liu X, Liu T, Wang D, Li Q, Wen S, Ma D, Xia J, Luo L, Zheng SG, Cui J, Zeng G, Chen L, Cheng B, Wang Z. Pik3ip1 Is a Negative Immune Regulator that Inhibits Antitumor T-Cell Immunity. Clin Cancer Res 2019; 25:6180-6194. [PMID: 31350312 DOI: 10.1158/1078-0432.ccr-18-4134] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 04/19/2019] [Accepted: 07/24/2019] [Indexed: 11/16/2022]
Abstract
PURPOSE Multiple negative regulators restrict the ability of T cells to attack tumors. This work demonstrates the role of PI3K-interacting protein 1 (Pik3ip1) in restraining T-cell responses and antitumor immunity. EXPERIMENTAL DESIGN An anti-Pik3ip1 mAb was generated to identify the Pik3ip1 expression pattern of hematopoietic cells. Pik3ip1 -/- mice and a Pik3ip1 fusion protein were generated to investigate the effect of Pik3ip1 on T-cell-mediated antitumor immunity in MC38 and B16-F10 tumor models. Immunoblotting and confocal microscopy were used to identify inhibitory effects of Pik3ip1 on T-cell receptor (TCR) signaling. Pik3ip1 expression was quantified, and its impact on T-cell function in human tumors was measured. RESULTS We demonstrated that Pik3ip1 was predominantly expressed on T cells and served as an essential rheostat for T-cell-mediated immunity. A Pik3ip1 genetic deficiency led to enhanced T-cell responsiveness upon immunization with a neoantigen. Pik3ip1 -/- mice exhibited a marked increase in antitumor immunity and were resistant to tumor growth. Furthermore, Pik3ip1 extracellular domain fusion protein enhanced MC38 tumor growth was observed. Mechanistically, we found that Pik3ip1 inhibited TCR signaling by mediating the degradation of SLP76 through Pik3ip1 oligomerization via its extracellular region. Consistent with the results from the mouse models, PIK3IP1 expression correlated with T-cell dysfunction in human tumors. CONCLUSIONS Our data reveal a critical role for Pik3ip1 as a novel inhibitory immune regulator of T-cell responses and provide a potential molecular target for cancer immunotherapy.
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Affiliation(s)
- Yichen Chen
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Jun Wang
- Department of Immunobiology and Yale Cancer Center, Yale University, New Haven, Connecticut
| | - Xi Wang
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Xinye Li
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Jingjing Song
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Juan Fang
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Xiangqi Liu
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Tao Liu
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P.R. China
| | - Dikan Wang
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Qunxing Li
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Shuqiong Wen
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Da Ma
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Juan Xia
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Liqun Luo
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, P.R. China
| | - Song Guo Zheng
- Department of Internal Medicine, The Ohio State University College of Medicine and Wexner Medical Center, Columbus, Ohio
| | - Jun Cui
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, P.R. China
| | - Gucheng Zeng
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, P.R. China
| | - Lieping Chen
- Department of Immunobiology and Yale Cancer Center, Yale University, New Haven, Connecticut
| | - Bin Cheng
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China.
| | - Zhi Wang
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, P.R. China.
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Carpentier SJ, Ni M, Duggan JM, James RG, Cookson BT, Hamerman JA. The signaling adaptor BCAP inhibits NLRP3 and NLRC4 inflammasome activation in macrophages through interactions with Flightless-1. Sci Signal 2019; 12:12/581/eaau0615. [PMID: 31088976 DOI: 10.1126/scisignal.aau0615] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
B cell adaptor for phosphoinositide 3-kinase (PI3K) (BCAP) is a signaling adaptor that activates the PI3K pathway downstream of B cell receptor signaling in B cells and Toll-like receptor (TLR) signaling in macrophages. BCAP binds to the regulatory p85 subunit of class I PI3K and is a large, multidomain protein. We used proteomic analysis to identify other BCAP-interacting proteins in macrophages and found that BCAP specifically associated with the caspase-1 pseudosubstrate inhibitor Flightless-1 and its binding partner leucine-rich repeat flightless-interacting protein 2. Because these proteins inhibit the NLRP3 inflammasome, we investigated the role of BCAP in inflammasome function. Independent of its effects on TLR priming, BCAP inhibited NLRP3- and NLRC4-induced caspase-1 activation, cell death, and IL-1β release from macrophages. Accordingly, caspase-1-dependent clearance of a Yersinia pseudotuberculosis mutant was enhanced in BCAP-deficient mice. Mechanistically, BCAP delayed the recruitment and activation of pro-caspase-1 within the NLRP3/ASC preinflammasome through its association with Flightless-1. Thus, BCAP is a multifunctional signaling adaptor that inhibits key pathogen-sensing pathways in macrophages.
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Affiliation(s)
- Samuel J Carpentier
- Department of Microbiology, University of Washington, Seattle, WA 98195, USA
| | - Minjian Ni
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101, USA
| | - Jeffrey M Duggan
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101, USA.,Department of Immunology, University of Washington, Seattle, WA 98109, USA
| | - Richard G James
- Seattle Children's Research Institute, Seattle, WA 98101, USA.,Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Brad T Cookson
- Department of Microbiology, University of Washington, Seattle, WA 98195, USA.,Department of Laboratory Medicine, University of Washington, Seattle, WA 98195, USA
| | - Jessica A Hamerman
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101, USA. .,Department of Immunology, University of Washington, Seattle, WA 98109, USA
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40
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Chu T, Ni M, Chen C, Akilesh S, Hamerman JA. Cutting Edge: BCAP Promotes Lupus-like Disease and TLR-Mediated Type I IFN Induction in Plasmacytoid Dendritic Cells. THE JOURNAL OF IMMUNOLOGY 2019; 202:2529-2534. [PMID: 30936294 DOI: 10.4049/jimmunol.1801267] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 03/06/2019] [Indexed: 01/13/2023]
Abstract
Systemic lupus erythematosus severity correlates with elevated serum levels of type I IFNs, cytokines produced in large quantities by plasmacytoid dendritic cells (pDC) in response to engagement of TLR7 and TLR9 with endocytosed nucleic acids. B cell adaptor for PI3K (BCAP) promoted many aspects of TLR7-driven lupus-like disease, including Isg15 and Ifit1 expression in blood and an immature pDC phenotype associated with higher IFN production. BCAP-/- mice produced significantly less serum IFN-α than wild-type mice after injection of TLR9 agonist, and BCAP promoted TLR7 and TLR9-induced IFN-α production specifically in pDC. TLR-induced IFN-α production in pDC requires DOCK2-mediated activation of Rac1 leading to activation of IKKα, a mechanism we show was dependent on BCAP. BCAP-/- pDC had decreased actin polymerization and Rac1 activation and reduced IKKα phosphorylation upon TLR9 stimulation. We show a novel role for BCAP in promoting TLR-induced IFN-α production in pDC and in systemic lupus erythematosus pathogenesis.
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Affiliation(s)
- Talyn Chu
- Immunology Program, Benaroya Research Institute, Seattle, WA 98109.,Department of Immunology, University of Washington, Seattle, WA 98109; and
| | - Minjian Ni
- Immunology Program, Benaroya Research Institute, Seattle, WA 98109
| | - Chunmo Chen
- Immunology Program, Benaroya Research Institute, Seattle, WA 98109.,Department of Immunology, University of Washington, Seattle, WA 98109; and
| | - Shreeram Akilesh
- Department of Pathology, University of Washington, Seattle, WA 98195
| | - Jessica A Hamerman
- Immunology Program, Benaroya Research Institute, Seattle, WA 98109; .,Department of Immunology, University of Washington, Seattle, WA 98109; and
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41
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Deng J, Yu XQ, Wang PH. Inflammasome activation and Th17 responses. Mol Immunol 2019; 107:142-164. [PMID: 30739833 DOI: 10.1016/j.molimm.2018.12.024] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 12/20/2018] [Accepted: 12/21/2018] [Indexed: 12/24/2022]
Abstract
Immune sensing of exogenous molecules from microbes (e.g., pathogen-associated molecular patterns) and nonmicrobial molecules (e.g., asbestos, alum, and silica), as well as endogenous damage-associated molecular patterns (e.g., ATP, uric acid crystals, and amyloid A) activates innate immunity by inducing immune-related genes, including proinflammatory cytokines, which further facilitate the development of adaptive immunity. The roles of transcriptional responses downstream of immune sensing have been widely characterized in informing adaptive immunity; however, few studies focus on the effect of post-translational responses on the modulation of adaptive immune responses. Inflammasomes activated by the previously described endo- and exogenous stimuli autocatalytically induce intracellular pro-caspase-1, which cleaves the inactive precursors of interleukin-1β (IL-1β) and IL-18 into bioactive proinflammatory cytokines. IL-1β and IL-18 not only contribute to the host defense against infections by activating phagocytes, such as monocytes, macrophages, dendritic cells, and neutrophils, but also induce T-helper 17 (Th17)- and Th1-mediated adaptive immune responses. In synergy with IL-6 and IL-23, IL-1β activates IL-1 receptor (IL-1R) signaling to drive the differentiation of IL-17-producing Th17 cells, which not only play critical roles in host protective immunity to infections of bacteria, fungi, and certain viruses but also participate in the pathology of inflammatory disorders and tumorigenesis. Consequently, targeting inflammasomes and IL-1/IL-1R signaling may effectively improve the treatment of Th17-associated disorders, such as autoinflammatory diseases and cancers, thereby providing novel insights into drug development.
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Affiliation(s)
- Jian Deng
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Xiao-Qiang Yu
- School of Biological Sciences, University of Missouri - Kansas City, Kansas City, MO, 64110-2499, USA
| | - Pei-Hui Wang
- Advanced Medical Research Institute, Shandong University, Jinan, Shandong 250012, China; School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong.
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42
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Interleukin-18 in Health and Disease. Int J Mol Sci 2019; 20:ijms20030649. [PMID: 30717382 PMCID: PMC6387150 DOI: 10.3390/ijms20030649] [Citation(s) in RCA: 284] [Impact Index Per Article: 56.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 12/12/2022] Open
Abstract
Interleukin (IL)-18 was originally discovered as a factor that enhanced IFN-γ production from anti-CD3-stimulated Th1 cells, especially in the presence of IL-12. Upon stimulation with Ag plus IL-12, naïve T cells develop into IL-18 receptor (IL-18R) expressing Th1 cells, which increase IFN-γ production in response to IL-18 stimulation. Therefore, IL-12 is a commitment factor that induces the development of Th1 cells. In contrast, IL-18 is a proinflammatory cytokine that facilitates type 1 responses. However, IL-18 without IL-12 but with IL-2, stimulates NK cells, CD4+ NKT cells, and established Th1 cells, to produce IL-3, IL-9, and IL-13. Furthermore, together with IL-3, IL-18 stimulates mast cells and basophils to produce IL-4, IL-13, and chemical mediators such as histamine. Therefore, IL-18 is a cytokine that stimulates various cell types and has pleiotropic functions. IL-18 is a member of the IL-1 family of cytokines. IL-18 demonstrates a unique function by binding to a specific receptor expressed on various types of cells. In this review article, we will focus on the unique features of IL-18 in health and disease in experimental animals and humans.
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43
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van Sadelhoff JHJ, Perez Pardo P, Wu J, Garssen J, van Bergenhenegouwen J, Hogenkamp A, Hartog A, Kraneveld AD. The Gut-Immune-Brain Axis in Autism Spectrum Disorders; A Focus on Amino Acids. Front Endocrinol (Lausanne) 2019; 10:247. [PMID: 31057483 PMCID: PMC6477881 DOI: 10.3389/fendo.2019.00247] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/29/2019] [Indexed: 12/25/2022] Open
Abstract
Autism spectrum disorder (ASD) is a range of neurodevelopmental conditions that affect communication and social behavior. Besides social deficits, systemic inflammation, gastrointestinal immune-related problems, and changes in the gut microbiota composition are characteristic for people with ASD. Animal models showed that these characteristics can induce ASD-associated behavior, suggesting an intimate relationship between the microbiota, gut, immune system and the brain in ASD. Multiple factors can contribute to the development of ASD, but mutations leading to enhanced activation of the mammalian target of rapamycin (mTOR) are reported frequently. Hyperactivation of mTOR leads to deficits in the communication between neurons in the brain and to immune impairments. Hence, mTOR might be a critical factor linking the gut-brain-immune axis in ASD. Pharmacological inhibition of mTOR is shown to improve ASD-associated behavior and immune functions, however, the clinical use is limited due to severe side reactions. Interestingly, studies have shown that mTOR activation can also be modified by nutritional stimuli, in particular by amino acids. Moreover, specific amino acids are demonstrated to inhibit inflammation, improve gut barrier function and to modify the microbiota composition. In this review we will discuss the gut-brain-immune axis in ASD and explore the potential of amino acids as a treatment option for ASD, either via modification of mTOR activity, the immune system or the gut microbiota composition.
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Affiliation(s)
- Joris H. J. van Sadelhoff
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
- Danone Nutricia Research, Utrecht, Netherlands
| | - Paula Perez Pardo
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
| | - Jiangbo Wu
- Laboratory of Neuroimmunology, Department of Symptom Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
- Danone Nutricia Research, Utrecht, Netherlands
| | - Jeroen van Bergenhenegouwen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
- Danone Nutricia Research, Utrecht, Netherlands
| | - Astrid Hogenkamp
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
| | - Anita Hartog
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
- Danone Nutricia Research, Utrecht, Netherlands
| | - Aletta D. Kraneveld
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
- Veterinary Pharmacology, Institute for Risk Assessment Studies, Faculty of Veterinary Sciences, Utrecht University, Utrecht, Netherlands
- *Correspondence: Aletta D. Kraneveld
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Rodríguez-Alcázar JF, Ataide MA, Engels G, Schmitt-Mabmunyo C, Garbi N, Kastenmüller W, Latz E, Franklin BS. Charcot-Leyden Crystals Activate the NLRP3 Inflammasome and Cause IL-1β Inflammation in Human Macrophages. THE JOURNAL OF IMMUNOLOGY 2018; 202:550-558. [PMID: 30559319 DOI: 10.4049/jimmunol.1800107] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 11/13/2018] [Indexed: 12/30/2022]
Abstract
Charcot-Leyden crystals (CLCs) are Galectin-10 protein crystals that can form after eosinophils degranulate. CLCs can appear and persist in tissues from patients with eosinophilic disorders, such as asthma, allergic reactions, and fungal and helminthic infections. Despite abundant reports of their occurrence in human disease, the inflammatory potential of CLCs has remained unknown. In this article, we show that CLCs induce the release of the proinflammatory cytokine IL-1β upon their phagocytosis by primary human macrophages in vitro. Chemical inhibition and small interfering RNA knockdown of NLRP3 in primary human macrophages abrogated their IL-1β response to CLCs. Using C57BL/6 ASC-mCitrine transgenic inflammasome reporter mice, we showed that the instillation of CLCs into the lungs promoted the assembly of ASC complexes in infiltrating immune cells (neutrophils and inflammatory monocytes) and resulted in IL-1β accumulation into the bronchoalveolar lavage fluid. Our findings reveal that CLCs are recognized by the NLRP3 inflammasome, which may sustain inflammation that follows eosinophilic inflammatory processes.
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Affiliation(s)
| | - Marco Antonio Ataide
- Institute of Experimental Immunology, University Hospitals, University of Bonn, Bonn 53127, Germany
| | - Gudrun Engels
- Institute of Innate Immunity, University Hospitals, University of Bonn, Bonn 53127, Germany
| | | | - Natalio Garbi
- Institute of Experimental Immunology, University Hospitals, University of Bonn, Bonn 53127, Germany
| | - Wolfgang Kastenmüller
- Institute of Experimental Immunology, University Hospitals, University of Bonn, Bonn 53127, Germany
| | - Eicke Latz
- Institute of Innate Immunity, University Hospitals, University of Bonn, Bonn 53127, Germany.,Department of Infectious Diseases and Immunology, University of Massachusetts Medical School, Worcester, MA 01655; and.,German Center for Neurodegenerative Diseases, Bonn 53127, Germany
| | - Bernardo S Franklin
- Institute of Innate Immunity, University Hospitals, University of Bonn, Bonn 53127, Germany;
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