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Mitsuyama Y, Matsumoto H, Togami Y, Oda S, Onishi S, Yoshimura J, Murtatsu A, Ito H, Ogura H, Okuzaki D, Oda J. T cell dysfunction in elderly ARDS patients based on miRNA and mRNA integration analysis. Front Immunol 2024; 15:1368446. [PMID: 38571958 PMCID: PMC10987699 DOI: 10.3389/fimmu.2024.1368446] [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: 01/10/2024] [Accepted: 03/07/2024] [Indexed: 04/05/2024] Open
Abstract
Background Acute respiratory distress syndrome (ARDS) is respiratory failure that commonly occurs in critically ill patients, and the molecular mechanisms underlying its pathogenesis and severity are poorly understood. We evaluated mRNA and miRNA in patients with ARDS and elucidated the pathogenesis of ARDS after performing mRNA and miRNA integration analysis. Methods In this single-center, prospective, observational clinical study of patients with ARDS, peripheral blood of each patient was collected within 24 hours of admission. Sequencing of mRNA and miRNA was performed using whole blood from the ARDS patients and healthy donors. Results Thirty-four ARDS patients were compared with 15 healthy donors. Compared with the healthy donors, 1233 mRNAs and 6 miRNAs were upregulated and 1580 mRNAs and 13 miRNAs were downregulated in the ARDS patients. For both mRNA and miRNA-targeted mRNA, canonical pathway analysis showed that programmed death-1 (PD-1) and programmed cell death ligand 1 (PD-L1) cancer immunotherapy pathway was most activated and the Th2 pathway was most suppressed. For mRNA, the Th1 pathway was most suppressed. miR-149-3p and several miRNAs were identified as upstream regulators. Conclusion miRNAs regulated the PD-1 and PD-L1 cancer immunotherapy pathway and Th2 pathway through miRNA interference action of mRNA. Integrated analysis of mRNAs and miRNAs showed that T cells were dysfunctional in ARDS patients.
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Affiliation(s)
- Yumi Mitsuyama
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hisatake Matsumoto
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yuki Togami
- Department of Acute Medicine and Critical Care Medical Center, Osaka National Hospital, National Hospital Organization, Osaka, Japan
| | - Sayaka Oda
- Department of Oral and Maxillofacial Surgery, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Shinya Onishi
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jumpei Yoshimura
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Arisa Murtatsu
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroshi Ito
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Hiroshi Ogura
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Jun Oda
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
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Jiang C, Li X, Liu C, Li G, Zheng Y, Xie L, Wu W, Feng Q. HMGB1/PTEN/PI3K axis participates in the peripheral immune cell differentiation in two representative TCM syndromes of chronic hepatitis B patients. Anat Rec (Hoboken) 2023; 306:3085-3096. [PMID: 35225421 DOI: 10.1002/ar.24899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/29/2021] [Accepted: 01/22/2022] [Indexed: 11/12/2022]
Abstract
Liver depression and spleen deficiency syndrome (LDSDS) and spleen-gastric damp-heat syndrome (SGDHS) are two major traditional Chinese medicine syndromes observed in chronic hepatitis B (CHB). Both syndromes exhibit significant differences in the pathogenesis and prognosis, and are closely related to the immune system. However, the underlying mechanisms are largely unknown. This study aimed to explore the immunoregulatory mechanisms of the two syndromes and promote the differentiation precision between the two syndromes. Thirty-six patients with CHB (18 LDSDS patients and 18 SGDHS patients) and 14 healthy controls were recruited into this study and blood was collected from all the subjects for testing. We studied the contents of T lymphocytes by flow cytometry and the expression levels of HMGB1/PTEN/PI3K axis proteins by enzyme-linked immunosorbent assay (Elisa). Protein-protein interaction (PPI) networks among HMGB1/PTEN/PI3K axis were constructed for functional enrichment. The correlations between T lymphocytes and proteins were analyzed by constructing multiple regression equations. The results revealed that the CD8+ T cells level in the two syndromes were lower than that in healthy controls, and the levels of Th17, Treg cells, and HMGB1, PI3K, PDK1, Akt were higher than those of the healthy controls (p < 0.05). Moreover, the levels of CD4+ T, Th17 cells, and HMGB1, PTEN, PI3K in LDSDS were higher than SGDHS (p < 0.05). PPI network indicated that HMGB1/PTEN/PI3K axis participated in T cell activation and liver pathology. Our results revealed that HMGB1/PTEN/PI3K axis may play an important role in regulating the formation of peripheral immune differences between the two syndromes. CD4+ T and Th17 are two representative immune cells that may serve as potential biological markers for LDSDS and SGDHS in CHB.
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Affiliation(s)
- Cen Jiang
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Xia Li
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Chao Liu
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Guiyu Li
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Yanfeng Zheng
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Lushuang Xie
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Wenjun Wu
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
| | - Quansheng Feng
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
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Malainou C, Abdin SM, Lachmann N, Matt U, Herold S. Alveolar macrophages in tissue homeostasis, inflammation, and infection: evolving concepts of therapeutic targeting. J Clin Invest 2023; 133:e170501. [PMID: 37781922 PMCID: PMC10541196 DOI: 10.1172/jci170501] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023] Open
Abstract
Alveolar macrophages (AMs) are the sentinel cells of the alveolar space, maintaining homeostasis, fending off pathogens, and controlling lung inflammation. During acute lung injury, AMs orchestrate the initiation and resolution of inflammation in order to ultimately restore homeostasis. This central role in acute lung inflammation makes AMs attractive targets for therapeutic interventions. Single-cell RNA-Seq and spatial omics approaches, together with methodological advances such as the generation of human macrophages from pluripotent stem cells, have increased understanding of the ontogeny, function, and plasticity of AMs during infectious and sterile lung inflammation, which could move the field closer to clinical application. However, proresolution phenotypes might conflict with proinflammatory and antibacterial responses. Therefore, therapeutic targeting of AMs at vulnerable time points over the course of infectious lung injury might harbor the risk of serious side effects, such as loss of antibacterial host defense capacity. Thus, the identification of key signaling hubs that determine functional fate decisions in AMs is of the utmost importance to harness their therapeutic potential.
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Affiliation(s)
- Christina Malainou
- Department of Internal Medicine V, Universities of Giessen and Marburg Lung Center, Justus Liebig University Giessen, Member of the German Center for Lung Research (DZL), Giessen, Germany
- Institute for Lung Health, Justus Liebig University Giessen, Giessen, Germany
- Excellence Cluster Cardio-Pulmonary Institute, Giessen, Germany
- German Center for Lung Research (DZL), Heidelberg, Germany
| | - Shifaa M. Abdin
- German Center for Lung Research (DZL), Heidelberg, Germany
- Department of Pediatric Pneumology, Allergology and Neonatology and
- REBIRTH Center for Translational and Regenerative Medicine, Hannover Medical School, Hannover, Germany
| | - Nico Lachmann
- German Center for Lung Research (DZL), Heidelberg, Germany
- Department of Pediatric Pneumology, Allergology and Neonatology and
- REBIRTH Center for Translational and Regenerative Medicine, Hannover Medical School, Hannover, Germany
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany
- RESIST (Resolving Infection Susceptibility), Cluster of Excellence, Hannover Medical School, Hannover, Germany
| | - Ulrich Matt
- Department of Internal Medicine V, Universities of Giessen and Marburg Lung Center, Justus Liebig University Giessen, Member of the German Center for Lung Research (DZL), Giessen, Germany
- Institute for Lung Health, Justus Liebig University Giessen, Giessen, Germany
- Excellence Cluster Cardio-Pulmonary Institute, Giessen, Germany
- German Center for Lung Research (DZL), Heidelberg, Germany
| | - Susanne Herold
- Department of Internal Medicine V, Universities of Giessen and Marburg Lung Center, Justus Liebig University Giessen, Member of the German Center for Lung Research (DZL), Giessen, Germany
- Institute for Lung Health, Justus Liebig University Giessen, Giessen, Germany
- Excellence Cluster Cardio-Pulmonary Institute, Giessen, Germany
- German Center for Lung Research (DZL), Heidelberg, Germany
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Yang T, Qu X, Zhao J, Wang X, Wang Q, Dai J, Zhu C, Li J, Jiang L. Macrophage PTEN controls STING-induced inflammation and necroptosis through NICD/NRF2 signaling in APAP-induced liver injury. Cell Commun Signal 2023; 21:160. [PMID: 37370115 DOI: 10.1186/s12964-023-01175-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 05/25/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) signaling has been known to play a critical role in maintaining cellular and tissue homeostasis, which also has an essential role in the inflammatory response. However, it remains unidentified whether and how the macrophage PTEN may govern the innate immune signaling stimulator of interferon genes (STING) mediated inflammation and hepatocyte necroptosis in APAP-induced liver injury (AILI). METHODS Myeloid-specific PTEN knockout (PTENM-KO) and floxed PTEN (PTENFL/FL) mice were treated with APAP (400 mg/kg) or PBS. In a parallel in vitro study, bone marrow-derived macrophages (BMMs) were isolated from these conditional knockout mice and transfected with CRISPR/Cas9-mediated Notch1 knockout (KO) or CRISPR/Cas9-mediated STING activation vector followed by LPS (100 ng/ml) stimulation. RESULTS Here, we report that myeloid-specific PTEN knockout (PTENM-KO) mice were resistant to oxidative stress-induced hepatocellular injury with reduced macrophage/neutrophil accumulation and proinflammatory mediators in AILI. PTENM-KO increased the interaction of nuclear Notch intracellular domain (NICD) and nuclear factor (erythroid-derived 2)-like 2 (NRF2) in the macrophage nucleus, reducing reactive oxygen species (ROS) generation. Mechanistically, it is worth noting that macrophage NICD and NRF2 co-localize within the nucleus under inflammatory conditions. Additionally, Notch1 promotes the interaction of immunoglobulin kappa J region (RBPjκ) with NRF2. Disruption of the Notch1 signal in PTEN deletion macrophages, reduced RBPjκ and NRF2 binding, and activated STING signaling. Moreover, PTENM-KO macrophages with STING activated led to ROS generation and TNF-α release, resulting in hepatocyte necroptosis upon co-culture with primary hepatocytes. CONCLUSIONS Our findings demonstrate that the macrophage PTEN-NICD/NRF2-STING axis is critical to regulating oxidative stress-induced liver inflammation and necroptosis in AILI and implies the therapeutic potential for managing sterile liver inflammation. Video Abstract.
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Affiliation(s)
- Tao Yang
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
- Department of Respiratory and Critical Care Medicine, The Affiliated People's Hospital of Jiangsu University, The Zhenjiang Clinical Medical College of Nanjing Medical University, Zhenjiang, China
| | - Xiaoye Qu
- Department of Liver Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jiaying Zhao
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Xiao Wang
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Qian Wang
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Jingjing Dai
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Chuanlong Zhu
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China
| | - Jun Li
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China.
| | - Longfeng Jiang
- Department of Infectious Diseases, The First Affiliated Hospital With Nanjing Medical University, Nanjing, China.
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5
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Glover RC, Schwardt NH, Leano SKE, Sanchez ME, Thomason MK, Olive AJ, Reniere ML. A genome-wide screen in macrophages identifies PTEN as required for myeloid restriction of Listeria monocytogenes infection. PLoS Pathog 2023; 19:e1011058. [PMID: 37216395 PMCID: PMC10237667 DOI: 10.1371/journal.ppat.1011058] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 06/02/2023] [Accepted: 05/08/2023] [Indexed: 05/24/2023] Open
Abstract
Listeria monocytogenes (Lm) is an intracellular foodborne pathogen which causes the severe disease listeriosis in immunocompromised individuals. Macrophages play a dual role during Lm infection by both promoting dissemination of Lm from the gastrointestinal tract and limiting bacterial growth upon immune activation. Despite the relevance of macrophages to Lm infection, the mechanisms underlying phagocytosis of Lm by macrophages are not well understood. To identify host factors important for Lm infection of macrophages, we performed an unbiased CRISPR/Cas9 screen which revealed pathways that are specific to phagocytosis of Lm and those that are required for internalization of bacteria generally. Specifically, we discovered the tumor suppressor PTEN promotes macrophage phagocytosis of Lm and L. ivanovii, but not other Gram-positive bacteria. Additionally, we found that PTEN enhances phagocytosis of Lm via its lipid phosphatase activity by promoting adherence to macrophages. Using conditional knockout mice lacking Pten in myeloid cells, we show that PTEN-dependent phagocytosis is important for host protection during oral Lm infection. Overall, this study provides a comprehensive identification of macrophage factors involved in regulating Lm uptake and characterizes the function of one factor, PTEN, during Lm infection in vitro and in vivo. Importantly, these results demonstrate a role for opsonin-independent phagocytosis in Lm pathogenesis and suggest that macrophages play a primarily protective role during foodborne listeriosis.
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Affiliation(s)
- Rochelle C. Glover
- Department of Microbiology, University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Nicole H. Schwardt
- Department of Microbiology, University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Shania-Kate E. Leano
- Department of Microbiology, University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Madison E. Sanchez
- Department of Microbiology, University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Maureen K. Thomason
- Department of Microbiology, University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Andrew J. Olive
- Department of Microbiology & Molecular Genetics, College of Osteopathic Medicine, Michigan State University, East Lansing, Michigan, United States of America
| | - Michelle L. Reniere
- Department of Microbiology, University of Washington School of Medicine, Seattle, Washington, United States of America
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6
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Pearson A, Ortiz C, Eisenbaum M, Arrate C, Browning M, Mullan M, Bachmeier C, Crawford F, Ojo JO. Deletion of PTEN in microglia ameliorates chronic neuroinflammation following repetitive mTBI. Mol Cell Neurosci 2023; 125:103855. [PMID: 37084991 DOI: 10.1016/j.mcn.2023.103855] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/25/2023] [Accepted: 04/17/2023] [Indexed: 04/23/2023] Open
Abstract
Traumatic brain injury is a leading cause of morbidity and mortality in adults and children in developed nations. Following the primary injury, microglia, the resident innate immune cells of the CNS, initiate several inflammatory signaling cascades and pathophysiological responses that may persist chronically; chronic neuroinflammation following TBI has been closely linked to the development of neurodegeneration and neurological dysfunction. Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that have been shown to regulate several key mechanisms in the inflammatory response to TBI. Increasing evidence has shown that the modulation of the PI3K/AKT signaling pathway has the potential to influence the cellular response to inflammatory stimuli. However, directly targeting PI3K signaling poses several challenges due to its regulatory role in several cell survival pathways. We have previously identified that the phosphatase and tensin homolog deleted on chromosome 10 (PTEN), the major negative regulator of PI3K/AKT signaling, is dysregulated following exposure to repetitive mild traumatic brain injury (r-mTBI). Moreover, this dysregulated PI3K/AKT signaling was correlated with chronic microglial-mediated neuroinflammation. Therefore, we interrogated microglial-specific PTEN as a therapeutic target in TBI by generating a microglial-specific, Tamoxifen inducible conditional PTEN knockout model using a CX3CR1 Cre recombinase mouse line PTENfl/fl/CX3CR1+/CreERT2 (mcg-PTENcKO), and exposed them to our 20-hit r-mTBI paradigm. Animals were treated with tamoxifen at 76 days post-last injury, and the effects of microglia PTEN deletion on immune-inflammatory responses were assessed at 90-days post last injury. We observed that the deletion of microglial PTEN ameliorated the proinflammatory response to repetitive brain trauma, not only reducing chronic microglial activation and proinflammatory cytokine production but also rescuing TBI-induced reactive astrogliosis, demonstrating that these effects extended beyond microglia alone. Additionally, we observed that the pharmacological inhibition of PTEN with BpV(HOpic) ameliorated the LPS-induced activation of microglial NFκB signaling in vitro. Together, these data provide support for the role of PTEN as a regulator of chronic neuroinflammation following repetitive mild TBI.
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Affiliation(s)
- Andrew Pearson
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom.
| | - Camila Ortiz
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Max Eisenbaum
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Clara Arrate
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA
| | | | - Michael Mullan
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Corbin Bachmeier
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
| | - Fiona Crawford
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom; James A. Haley Veterans' Hospital, 13000 Bruce B Downs Blvd, Tampa, FL 33612, USA
| | - Joseph O Ojo
- The Roskamp Institute, 2040 Whitfield Avenue, Sarasota, FL 34243, USA; The Open University, Walton Hall, Kents Hill, Milton Keynes MK7 6AA, United Kingdom
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7
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Tian Y, Zhang M, Fan M, Xu H, Wu S, Zou S, Wang Y, Tang D, Zhang C, Han W, Yu H, Fu X, Huang W. A miRNA-mediated attenuation of hepatocarcinogenesis in both hepatocytes and Kupffer cells. MOLECULAR THERAPY. NUCLEIC ACIDS 2022; 30:1-12. [PMID: 36158629 PMCID: PMC9471972 DOI: 10.1016/j.omtn.2022.08.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 08/23/2022] [Indexed: 05/13/2023]
Abstract
MicroRNAs (miRNAs) are small noncoding RNAs that regulate a variety of physiological and pathological functions. miR-26a is one of the many miRNAs that have been identified as regulators of cancer development and as potential anticancer drug targets. However, the specific cellular and molecular mechanisms by which miR-26a attenuates hepatocarcinogenesis are still elusive. Here, we interrogated mouse models with miR-26a cell-specific overexpression in either hepatocytes or myeloid cells to show that miR-26a strongly attenuated the chemical-induced hepatocellular carcinoma (HCC). miR-26a overexpression broadly inhibited the inflammatory response in both hepatocytes and macrophages by decreasing several key oncogenic signaling pathways in HCC promotion. These findings thus reveal new insights into a concerted role of miR-26a in both hepatocytes and Kupffer cells to suppress hepatocarcinogenesis, thereby highlighting the potential use of miR-26a mimetics as potential approaches for the prevention and treatment of HCC.
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Affiliation(s)
- Yan Tian
- Division of Endocrinology and Metabolism, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041 Sichuan, China
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
| | - Mingfeng Zhang
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
| | - Mingjie Fan
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
| | - Haixia Xu
- Division of Endocrinology and Metabolism, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041 Sichuan, China
| | - Shunquan Wu
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
| | - Sailan Zou
- Division of Endocrinology and Metabolism, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041 Sichuan, China
| | - Yangmeng Wang
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
| | - Dongmei Tang
- Division of Endocrinology and Metabolism, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041 Sichuan, China
| | - Chunyan Zhang
- Department of Immuno-oncology, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
| | - Weidong Han
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
- Department of Medical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, Zhejiang 310016, China
| | - Hua Yu
- Department of Immuno-oncology, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
- Graduate School of Biological Science, City of Hope National Medical Center, Duarte, CA 91010, USA
| | - Xianghui Fu
- Division of Endocrinology and Metabolism, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041 Sichuan, China
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
| | - Wendong Huang
- Department of Diabetes Complications and Metabolism, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
- Graduate School of Biological Science, City of Hope National Medical Center, Duarte, CA 91010, USA
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8
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Wang Z, Wei X, Ji C, Yu W, Song C, Wang C. PGE2 inhibits neutrophil phagocytosis through the EP2R-cAMP-PTEN pathway. Immun Inflamm Dis 2022; 10:e662. [PMID: 35759236 PMCID: PMC9186335 DOI: 10.1002/iid3.662] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/29/2022] [Accepted: 05/18/2022] [Indexed: 11/25/2022] Open
Abstract
Prostaglandin E2 (PGE2) is a potent lipid mediator of inflammation that modulates immune cell function by binding to unique G protein-coupled receptors (EP receptors). PGE2 production increases during microbial infection and inflammation. In this study, we assessed the effect of PGE2 on the phagocytosis of bacteria by neutrophils, which are key players during infection and inflammation. We also looked for specific EP receptor signaling pathways that contributed to the neutrophil phagocytic activity. PGE2 (50-1000 ng/ml) inhibited the phagocytosis of Escherichia coli by HL-60 human neutrophils in a concentration-dependent manner. Inhibition of neutrophil phagocytosis by PGE2 correlated with increased intracellular cyclic adenosine monophosphate (cAMP) production, and forskolin, an adenosyl cyclase agonist, confirmed the inhibitory effect of cAMP stimulation on neutrophil phagocytosis. The expression of EP2 receptors by HL-60 cells was confirmed by western blot analysis, and selective agonism of EP2 receptors mimicked the inhibition of phagocytosis by PGE2. The EP2 receptor antagonist AH-6089 partially blocked the inhibition of neutrophil phagocytosis PGE2. Specific inhibition of phosphatase and tensin homolog (PTEN) enzyme attenuated the inhibition of neutrophil phagocytosis by PGE2, and both PGE2 and increased intracellular cAMP increased neutrophil PTEN activity, which was associated with decreased PTEN phosphorylation. The results support negative regulation of the antimicrobial activity of neutrophils (i.e., phagocytosis), which has important implications for the future management of bacterial infections.
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Affiliation(s)
- Zixuan Wang
- Department of Immunology, School of Laboratory MedicineBengbu Medical CollegeBengbuAnhuiP.R. China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical CollegeBengbuAnhuiP.R. China
| | - Xinyuan Wei
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical CollegeBengbuAnhuiP.R. China
- Department of Obstetrics and Gynecologythe First Affiliated Hospital of Bengbu Medical CollegeBengbuChinaAnhui
| | - Caili Ji
- Department of Immunology, School of Laboratory MedicineBengbu Medical CollegeBengbuAnhuiP.R. China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical CollegeBengbuAnhuiP.R. China
| | - Wenhua Yu
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical CollegeBengbuAnhuiP.R. China
- Department of Obstetrics and Gynecologythe First Affiliated Hospital of Bengbu Medical CollegeBengbuChinaAnhui
| | - Chuanwang Song
- Department of Immunology, School of Laboratory MedicineBengbu Medical CollegeBengbuAnhuiP.R. China
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical CollegeBengbuAnhuiP.R. China
| | - Caizhi Wang
- Anhui Province Key Laboratory of Immunology in Chronic Diseases, Bengbu Medical CollegeBengbuAnhuiP.R. China
- Department of Obstetrics and Gynecologythe First Affiliated Hospital of Bengbu Medical CollegeBengbuChinaAnhui
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9
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Kadri S, Nakada-Tsukui K, Watanabe N, Jeelani G, Nozaki T. PTEN differentially regulates endocytosis, migration, and proliferation in the enteric protozoan parasite Entamoeba histolytica. PLoS Pathog 2022; 18:e1010147. [PMID: 35500038 PMCID: PMC9122207 DOI: 10.1371/journal.ppat.1010147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 05/20/2022] [Accepted: 04/04/2022] [Indexed: 11/18/2022] Open
Abstract
PTEN is a lipid phosphatase that is highly conserved and involved in a broad range of biological processes including cytoskeletal reorganization, endocytosis, signal transduction, and cell migration in all eukaryotes. Although regulation of phosphatidylinositol (3,4,5)-trisphosphate [PtdIns(3,4,5)P3] signaling via PTEN has been well established in model organisms and mammals, it remains elusive in the parasitic protist E. histolytica, which heavily relies on PtdIns phosphate(s)-dependent membrane traffic, migration, and phago- and trogocytosis for its pathogenesis. In this study, we characterized the major PTEN from E. histolytica, EhPTEN1, which shows the highest expression at the transcript level in the trophozoite stage among 6 possible PTENs, to understand the significance of PtdIns(3,4,5)P3 signaling in this parasite. Live imaging of GFP-EhPTEN1 expressing amebic trophozoites showed localization mainly in the cytosol with a higher concentration at pseudopods and the extending edge of the phago- and trogocytic cups. Furthermore, quantitative analysis of phago- and trogocytosis using a confocal image cytometer showed that overexpression of EhPTEN1 caused reduction in trogo- and phagocytosis while transcriptional gene silencing of EhPTEN1 gene caused opposite phenotypes. These data suggest that EhPTEN1 has an inhibitory role in these biological processes. Conversely, EhPTEN1 acts as a positive regulator for fluid-phase and receptor-mediated endocytosis in E. histolytica trophozoites. Moreover, we showed that EhPTEN1 was required for optimal growth and migration of this parasite. Finally, the phosphatase activity of EhPTEN1 towards PtdIns(3,4,5)P3 was demonstrated, suggesting that the biological roles of EhPTEN1 are likely linked to its catalytic function. Taken together, these results indicate that EhPTEN1 differentially regulates multiple cellular activities essential for proliferation and pathogenesis of the organism, via PtdIns(3,4,5)P3 signaling. Elucidation of biological roles of PTEN and PtdIns(3,4,5)P3 signaling at the molecular levels promotes our understanding of the pathogenesis of this parasite.
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Affiliation(s)
- Samia Kadri
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kumiko Nakada-Tsukui
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo, Japan
| | - Natsuki Watanabe
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Ghulam Jeelani
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tomoyoshi Nozaki
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- * E-mail:
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10
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Kuttke M, Hromadová D, Yildirim C, Brunner JS, Vogel A, Paar H, Peters S, Weber M, Hofmann M, Kerndl M, Kieler M, Datler H, Musiejovsky L, Salzmann M, Lang M, Soukup K, Halfmann A, Sharif O, Schabbauer G. PI3K Signaling in Dendritic Cells Aggravates DSS-Induced Colitis. Front Immunol 2022; 13:695576. [PMID: 35514976 PMCID: PMC9063450 DOI: 10.3389/fimmu.2022.695576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 03/15/2022] [Indexed: 11/13/2022] Open
Abstract
Aberrant innate immune responses to the gut microbiota are causally involved in the pathogenesis of inflammatory bowel diseases (IBD). The exact triggers and main signaling pathways activating innate immune cells and how they modulate adaptive immunity in IBD is still not completely understood. Here, we report that the PI3K/PTEN signaling pathway in dendritic cells enhances IL-6 production in a model of DSS-induced colitis. This results in exacerbated Th1 cell responses and increased mortality in DC-specific PTEN knockout (PTENΔDC) animals. Depletion of the gut microbiota using antibiotics as well as blocking IL-6R signaling rescued mortality in PTENΔDC mice, whereas adoptive transfer of Flt3L-derived PTEN-/- DCs into WT recipients exacerbated DSS-induced colitis and increased mortality. Taken together, we show that the PI3K signaling pathway in dendritic cells contributes to disease pathology by promoting IL-6 mediated Th1 responses.
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Affiliation(s)
- Mario Kuttke
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Dominika Hromadová
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Ceren Yildirim
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Julia S. Brunner
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Andrea Vogel
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Hannah Paar
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Sophie Peters
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Maria Weber
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Melanie Hofmann
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Martina Kerndl
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Markus Kieler
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Hannes Datler
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Laszlo Musiejovsky
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Manuel Salzmann
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Michaela Lang
- Department of Gastroenterology and Hepatology, Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Klara Soukup
- St. Anna Children’s Cancer Research Institute, Vienna, Austria
| | - Angela Halfmann
- St. Anna Children’s Cancer Research Institute, Vienna, Austria
| | - Omar Sharif
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Gernot Schabbauer
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
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11
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Sarma A, Christenson SA, Byrne A, Mick E, Pisco AO, DeVoe C, Deiss T, Ghale R, Zha BS, Tsitsiklis A, Jauregui A, Moazed F, Detweiler AM, Spottiswoode N, Sinha P, Neff N, Tan M, Serpa PH, Willmore A, Ansel KM, Wilson JG, Leligdowicz A, Siegel ER, Sirota M, DeRisi JL, Matthay MA, Hendrickson CM, Kangelaris KN, Krummel MF, Woodruff PG, Erle DJ, Calfee CS, Langelier CR. Tracheal aspirate RNA sequencing identifies distinct immunological features of COVID-19 ARDS. Nat Commun 2021; 12:5152. [PMID: 34446707 PMCID: PMC8390461 DOI: 10.1038/s41467-021-25040-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 07/13/2021] [Indexed: 12/15/2022] Open
Abstract
The immunological features that distinguish COVID-19-associated acute respiratory distress syndrome (ARDS) from other causes of ARDS are incompletely understood. Here, we report the results of comparative lower respiratory tract transcriptional profiling of tracheal aspirate from 52 critically ill patients with ARDS from COVID-19 or from other etiologies, as well as controls without ARDS. In contrast to a "cytokine storm," we observe reduced proinflammatory gene expression in COVID-19 ARDS when compared to ARDS due to other causes. COVID-19 ARDS is characterized by a dysregulated host response with increased PTEN signaling and elevated expression of genes with non-canonical roles in inflammation and immunity. In silico analysis of gene expression identifies several candidate drugs that may modulate gene expression in COVID-19 ARDS, including dexamethasone and granulocyte colony stimulating factor. Compared to ARDS due to other types of viral pneumonia, COVID-19 is characterized by impaired interferon-stimulated gene (ISG) expression. The relationship between SARS-CoV-2 viral load and expression of ISGs is decoupled in patients with COVID-19 ARDS when compared to patients with mild COVID-19. In summary, assessment of host gene expression in the lower airways of patients reveals distinct immunological features of COVID-19 ARDS.
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Affiliation(s)
- Aartik Sarma
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA
| | - Stephanie A. Christenson
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA
| | - Ashley Byrne
- grid.499295.aChan Zuckerberg Biohub, San Francisco, CA USA
| | - Eran Mick
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA ,grid.499295.aChan Zuckerberg Biohub, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Division of Infectious Diseases, University of California, San Francisco, CA USA
| | | | - Catherine DeVoe
- grid.266102.10000 0001 2297 6811Division of Infectious Diseases, University of California, San Francisco, CA USA
| | - Thomas Deiss
- grid.499295.aChan Zuckerberg Biohub, San Francisco, CA USA
| | - Rajani Ghale
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Division of Infectious Diseases, University of California, San Francisco, CA USA
| | - Beth Shoshana Zha
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA
| | - Alexandra Tsitsiklis
- grid.266102.10000 0001 2297 6811Division of Infectious Diseases, University of California, San Francisco, CA USA
| | - Alejandra Jauregui
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA
| | - Farzad Moazed
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA
| | - Angela M. Detweiler
- grid.266102.10000 0001 2297 6811Division of Infectious Diseases, University of California, San Francisco, CA USA
| | - Natasha Spottiswoode
- grid.266102.10000 0001 2297 6811Department of Medicine, University of California, San Francisco, CA USA
| | - Pratik Sinha
- grid.4367.60000 0001 2355 7002Department of Anesthesia, Washington University, Saint Louis, MO USA
| | - Norma Neff
- grid.499295.aChan Zuckerberg Biohub, San Francisco, CA USA
| | - Michelle Tan
- grid.499295.aChan Zuckerberg Biohub, San Francisco, CA USA
| | - Paula Hayakawa Serpa
- grid.266102.10000 0001 2297 6811Division of Infectious Diseases, University of California, San Francisco, CA USA
| | - Andrew Willmore
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA
| | - K. Mark Ansel
- grid.266102.10000 0001 2297 6811Department of Microbiology and Immunology, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Sandler Asthma Basic Research Center, University of California, San Francisco, CA USA
| | - Jennifer G. Wilson
- grid.168010.e0000000419368956Department of Emergency Medicine, Stanford University, Palo Alto, CA USA
| | - Aleksandra Leligdowicz
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA ,grid.17063.330000 0001 2157 2938Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario Canada ,grid.266102.10000 0001 2297 6811Cardiovascular Research Institute, University of California, San Francisco, CA USA
| | - Emily R. Siegel
- grid.266102.10000 0001 2297 6811School of Medicine, University of California, San Francisco, CA USA
| | - Marina Sirota
- grid.266102.10000 0001 2297 6811Division of Rheumatology, University of California, San Francisco, CA USA
| | - Joseph L. DeRisi
- grid.499295.aChan Zuckerberg Biohub, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Department of Biochemistry and Biophysics, University of California, San Francisco, CA USA
| | - Michael A. Matthay
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Cardiovascular Research Institute, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Department of Anesthesia, University of California, San Francisco, CA USA
| | | | - Carolyn M. Hendrickson
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA
| | - Kirsten N. Kangelaris
- grid.266102.10000 0001 2297 6811Department of Medicine, University of California, San Francisco, CA USA
| | - Matthew F. Krummel
- grid.266102.10000 0001 2297 6811Department of Pathology, University of California, San Francisco, CA USA
| | - Prescott G. Woodruff
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Sandler Asthma Basic Research Center, University of California, San Francisco, CA USA
| | - David J. Erle
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Department of Medicine, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Lung Biology Center, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811UCSF CoLabs, University of California, San Francisco, CA USA
| | - Carolyn S. Calfee
- grid.266102.10000 0001 2297 6811Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Cardiovascular Research Institute, University of California, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Department of Anesthesia, University of California, San Francisco, CA USA
| | - Charles R. Langelier
- grid.499295.aChan Zuckerberg Biohub, San Francisco, CA USA ,grid.266102.10000 0001 2297 6811Division of Infectious Diseases, University of California, San Francisco, CA USA
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12
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Liu QF, Zhang Y, Deng L, Zhang T, Xiao JP, Zhou ZM, Bi N. MiR-32 Suppresses the Development of Lung Cancer via Modulating PI3K/Akt. J BIOMATER TISS ENG 2021. [DOI: 10.1166/jbt.2021.2684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Our team utilized qRT-PCR for prospecting miR-32 expression level in primary lung carcinoma tissues and cell lines, as well as Kaplan–Meier method for dissecting the relation of miR-32 expression with the prognosis of lung carcinoma. We transfected lung cancer A549 cells with
miR-32 mimic/inhibitor and mimic/inhibitor NC, and appraised the influences of miR-32 on the phenotype changes of lung carcinoma cells via MTT assay, wound healing assay and cell apoptosis assay, separately. Then the target gene of miR-32 was predicted via bioinformatics. Finally, Western
blotting was adopted for analyzing the impact of alteration of miR-32 expression on the PI3K/Akt axis in A549 cells. In lung carcinoma tissues as well as cells, miR-32 expression is down-regulated, and miR-32 partakes in the progress of lung carcinoma via PI3K/Akt pathway.
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Affiliation(s)
- Qing-Feng Liu
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100021, China
| | - Ye Zhang
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100021, China
| | - Lei Deng
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100021, China
| | - Tao Zhang
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100021, China
| | - Jian-Ping Xiao
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100021, China
| | - Zong-Mei Zhou
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100021, China
| | - Nan Bi
- Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100021, China
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13
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The μ-opioid receptor induces miR-21 expression and is ERK/PKCμ-dependent. J Neuroimmunol 2021; 356:577585. [PMID: 33940234 DOI: 10.1016/j.jneuroim.2021.577585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 04/22/2021] [Accepted: 04/22/2021] [Indexed: 11/22/2022]
Abstract
Micro RNA-21 (miR-21) is believed to perform an important role in the transition from inflammation to resolution in the innate immune response. The biochemical basis for the induction of miR-21 remains uncertain. However, the activation of the μ-opioid receptor (MOR) induces the expression of miR-21. Our results show that human monocytes treated with μ-opioid agonists exhibit a significant increase in miR-21 expression. We found that MOR-induction of miR-21 requires the activation of the Ras-Raf-MEK-ERK signaling cascade, and to our surprise, the activation of PKCμ (PKD1). These results are significant given the role of miR-21 in the sensitivity to pain.
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14
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Zhang W, Fu X, Xie J, Pan H, Han W, Huang W. miR-26a attenuates colitis and colitis-associated cancer by targeting the multiple intestinal inflammatory pathways. MOLECULAR THERAPY-NUCLEIC ACIDS 2021; 24:264-273. [PMID: 33815939 PMCID: PMC7985669 DOI: 10.1016/j.omtn.2021.02.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 02/24/2021] [Indexed: 02/08/2023]
Abstract
Patients with inflammatory bowel disease are at increased risk for colitis-associated colorectal cancer (CAC). Therefore, controlling intestinal inflammation is a key therapeutic strategy for CAC. MicroRNAs (miRNAs or miRs) are a family of small noncoding RNAs that have the capacity to regulate fundamental biological processes. To date, a number of miRNAs have been identified as critical regulators of inflammation. However, the specific role of miR-26a in colonic inflammation and colitis-associated carcinogenesis is still elusive. Here, we generated mice with miR-26a myeloid-cell-specific overexpression to show that miR-26a suppressed the intestinal inflammatory response in macrophages by decreasing nuclear factor κB (NF-κB)/STAT3 activation and interleukin 6 (IL-6) production. At the molecular level, a number of NF-κB regulators, including TLR3, PTEN, and PKCδ, were identified as potential targets of miR-26a. Our results thus identify a novel miRNA-mediated mechanism that suppresses carcinogenic inflammation in the colon.
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Affiliation(s)
- Wei Zhang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, Zhejiang 310016, China
| | - Xianghui Fu
- Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA.,Division of Endocrinology and Metabolism, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Jiansheng Xie
- Department of Medical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, Zhejiang 310016, China
| | - Hongming Pan
- Department of Medical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, Zhejiang 310016, China
| | - Weidong Han
- Department of Medical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, Zhejiang 310016, China.,Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA
| | - Wendong Huang
- Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope National Medical Center, 1500 E. Duarte Road, Duarte, CA 91010, USA.,Graduate School of Biological Science, City of Hope National Medical Center, Duarte, CA 91010, USA
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15
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Yan L, Tsujita K, Fujita Y, Itoh T. PTEN is required for the migration and invasion of Ras-transformed MDCK cells. FEBS Lett 2021; 595:1303-1312. [PMID: 33540467 DOI: 10.1002/1873-3468.14053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/12/2021] [Accepted: 01/25/2021] [Indexed: 12/30/2022]
Abstract
The balance between phosphoinositides distributed at specific sites in the plasma membrane causes polarized actin polymerization. Oncogenic transformations affect this balance by regulating phosphoinositide 3-kinase (PI3K) and phosphatase and tensin homolog deleted on chromosome 10 (PTEN), causing metastatic behavior in cancer cells. Here, we show that the PTEN tumor suppressor gene is required for epithelial cancer cell invasion. Loss of PTEN in Ras-transformed MDCK cells suppressed their migratory phenotype in collagen gel and invasion through Matrigel. Rescue experiments showed a requirement for the C2 domain-mediated membrane recruitment of PTEN, which is typically observed at the rear side of invading cancer cells. These findings support the role of PTEN in suppression of unwanted leading edges necessary for efficient migration of epithelial cancer cells.
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Affiliation(s)
- Lu Yan
- Division of Membrane Biology, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Japan
| | - Kazuya Tsujita
- Division of Membrane Biology, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Japan.,Biosignal Research Center, Kobe University, Japan
| | - Yasuyuki Fujita
- Division of Molecular Oncology, Institute for Genetic Medicine, Hokkaido University Graduate School of Chemical Sciences and Engineering, Sapporo, Japan.,Division of Molecular Oncology, Graduate School of Medicine, Kyoto University, Japan
| | - Toshiki Itoh
- Division of Membrane Biology, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Japan.,Biosignal Research Center, Kobe University, Japan
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16
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Lin WC, Fessler MB. Regulatory mechanisms of neutrophil migration from the circulation to the airspace. Cell Mol Life Sci 2021; 78:4095-4124. [PMID: 33544156 PMCID: PMC7863617 DOI: 10.1007/s00018-021-03768-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/22/2020] [Accepted: 01/16/2021] [Indexed: 02/07/2023]
Abstract
The neutrophil, a short-lived effector leukocyte of the innate immune system best known for its proteases and other degradative cargo, has unique, reciprocal physiological interactions with the lung. During health, large numbers of ‘marginated’ neutrophils reside within the pulmonary vasculature, where they patrol the endothelial surface for pathogens and complete their life cycle. Upon respiratory infection, rapid and sustained recruitment of neutrophils through the endothelial barrier, across the extravascular pulmonary interstitium, and again through the respiratory epithelium into the airspace lumen, is required for pathogen killing. Overexuberant neutrophil trafficking to the lung, however, causes bystander tissue injury and underlies several acute and chronic lung diseases. Due in part to the unique architecture of the lung’s capillary network, the neutrophil follows a microanatomic passage into the distal airspace unlike that observed in other end-organs that it infiltrates. Several of the regulatory mechanisms underlying the stepwise recruitment of circulating neutrophils to the infected lung have been defined over the past few decades; however, fundamental questions remain. In this article, we provide an updated review and perspective on emerging roles for the neutrophil in lung biology, on the molecular mechanisms that control the trafficking of neutrophils to the lung, and on past and ongoing efforts to design therapeutics to intervene upon pulmonary neutrophilia in lung disease.
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Affiliation(s)
- Wan-Chi Lin
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, 111 T.W. Alexander Drive, P.O. Box 12233, MD D2-01, Research Triangle Park, NC, 27709, USA
| | - Michael B Fessler
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, 111 T.W. Alexander Drive, P.O. Box 12233, MD D2-01, Research Triangle Park, NC, 27709, USA.
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17
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Sarma A, Christenson SA, Mick E, DeVoe C, Deiss T, Pisco AO, Ghale R, Jauregui A, Byrne A, Moazed F, Spottiswoode N, Sinha P, Zha BS, Neff N, Tan M, Serpa PH, Ansel KM, Wilson JG, Leligdowicz A, Siegel ER, Sirota M, DeRisi JL, Matthay MA, Hendrickson CM, Kangelaris KN, Krummel MF, Woodruff PG, Erle DJ, Calfee CS, Langelier CR. COVID-19 ARDS is characterized by a dysregulated host response that differs from cytokine storm and is modified by dexamethasone. RESEARCH SQUARE 2021:rs.3.rs-141578. [PMID: 33469573 PMCID: PMC7814832 DOI: 10.21203/rs.3.rs-141578/v1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We performed comparative lower respiratory tract transcriptional profiling of 52 critically ill patients with the acute respiratory distress syndrome (ARDS) from COVID-19 or from other etiologies, as well as controls without ARDS. In contrast to a cytokine storm, we observed reduced proinflammatory gene expression in COVID-19 ARDS when compared to ARDS due to other causes. COVID-19 ARDS was characterized by a dysregulated host response with increased PTEN signaling and elevated expression of genes with non-canonical roles in inflammation and immunity that were predicted to be modulated by dexamethasone and granulocyte colony stimulating factor. Compared to ARDS due to other types of viral pneumonia, COVID-19 was characterized by impaired interferon-stimulated gene expression (ISG). We found that the relationship between SARS-CoV-2 viral load and expression of ISGs was decoupled in patients with COVID-19 ARDS when compared to patients with mild COVID-19. In summary, assessment of host gene expression in the lower airways of patients with COVID-19 ARDS did not demonstrate cytokine storm but instead revealed a unique and dysregulated host response predicted to be modified by dexamethasone.
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Affiliation(s)
- Aartik Sarma
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
| | - Stephanie A. Christenson
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
| | - Eran Mick
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
- Division of Infectious Diseases, University of California, San Francisco, CA, USA
- Chan Zuckerberg Biohub, San Francisco, CA, USA
| | - Catherine DeVoe
- Division of Infectious Diseases, University of California, San Francisco, CA, USA
| | - Thomas Deiss
- Division of Infectious Diseases, University of California, San Francisco, CA, USA
| | | | - Rajani Ghale
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
- Division of Infectious Diseases, University of California, San Francisco, CA, USA
| | - Alejandra Jauregui
- Division of Infectious Diseases, University of California, San Francisco, CA, USA
| | | | - Farzad Moazed
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
| | | | - Pratik Sinha
- Department of Anesthesia, Washington University, Saint Louis, Missouri, MO, USA
| | - Beth Shoshana Zha
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
| | - Norma Neff
- Chan Zuckerberg Biohub, San Francisco, CA, USA
| | | | - Paula Hayakawa Serpa
- Division of Infectious Diseases, University of California, San Francisco, CA, USA
- Chan Zuckerberg Biohub, San Francisco, CA, USA
| | - K. Mark Ansel
- Department of Microbiology and Immunology, University of California, San Francisco, CA, USA
- Sandler Asthma Basic Research Center, University of California, San Francisco, CA, USA
| | - Jennifer G. Wilson
- Department of Emergency Medicine, Stanford University, Palo Alto, CA, USA
| | | | - Emily R. Siegel
- School of Medicine, University of California, San Francisco, CA, USA
| | - Marina Sirota
- Division of Rheumatology, University of California, San Francisco, CA, USA
| | - Joseph L. DeRisi
- Chan Zuckerberg Biohub, San Francisco, CA, USA
- Department of Biochemistry and Biophysics, University of California, San Francisco, CA, USA
| | - Michael A. Matthay
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
| | | | - Carolyn M. Hendrickson
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
| | | | - Matthew F. Krummel
- Department of Pathology, University of California, San Francisco, CA, USA
| | - Prescott G. Woodruff
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
- Sandler Asthma Basic Research Center, University of California, San Francisco, CA, USA
| | - David J. Erle
- Department of Medicine, University of California, San Francisco, CA, USA
- Lung Biology Center, University of California, San Francisco, CA, USA
- UCSF CoLabs, University of California, San Francisco, CA, USA
| | - Carolyn S. Calfee
- Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of California, San Francisco, CA, USA
| | - Charles R. Langelier
- Division of Infectious Diseases, University of California, San Francisco, CA, USA
- Chan Zuckerberg Biohub, San Francisco, CA, USA
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18
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Brunner JS, Vogel A, Lercher A, Caldera M, Korosec A, Pühringer M, Hofmann M, Hajto A, Kieler M, Garrido LQ, Kerndl M, Kuttke M, Mesteri I, Górna MW, Kulik M, Dominiak PM, Brandon AE, Estevez E, Egan CL, Gruber F, Schweiger M, Menche J, Bergthaler A, Weichhart T, Klavins K, Febbraio MA, Sharif O, Schabbauer G. The PI3K pathway preserves metabolic health through MARCO-dependent lipid uptake by adipose tissue macrophages. Nat Metab 2020; 2:1427-1442. [PMID: 33199895 DOI: 10.1038/s42255-020-00311-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 10/09/2020] [Indexed: 12/25/2022]
Abstract
Adipose tissue macrophages (ATMs) display tremendous heterogeneity depending on signals in their local microenvironment and contribute to the pathogenesis of obesity. The phosphoinositide 3-kinase (PI3K) signalling pathway, antagonized by the phosphatase and tensin homologue (PTEN), is important for metabolic responses to obesity. We hypothesized that fluctuations in macrophage-intrinsic PI3K activity via PTEN could alter the trajectory of metabolic disease by driving distinct ATM populations. Using mice harbouring macrophage-specific PTEN deletion or bone marrow chimeras carrying additional PTEN copies, we demonstrate that sustained PI3K activity in macrophages preserves metabolic health in obesity by preventing lipotoxicity. Myeloid PI3K signalling promotes a beneficial ATM population characterized by lipid uptake, catabolism and high expression of the scavenger macrophage receptor with collagenous structure (MARCO). Dual MARCO and myeloid PTEN deficiencies prevent the generation of lipid-buffering ATMs, reversing the beneficial actions of elevated myeloid PI3K activity in metabolic disease. Thus, macrophage-intrinsic PI3K signalling boosts metabolic health by driving ATM programmes associated with MARCO-dependent lipid uptake.
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Affiliation(s)
- Julia S Brunner
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Andrea Vogel
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Alexander Lercher
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Michael Caldera
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Max Perutz Laboratories, Vienna, Austria
| | - Ana Korosec
- Skin and Endothelium Research Division, Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Marlene Pühringer
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Melanie Hofmann
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Alexander Hajto
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Markus Kieler
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Lucia Quemada Garrido
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Martina Kerndl
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | - Mario Kuttke
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria
| | | | - Maria W Górna
- Biological and Chemical Research Centre, Department of Chemistry, University of Warsaw, Warsaw, Poland
| | - Marta Kulik
- Biological and Chemical Research Centre, Department of Chemistry, University of Warsaw, Warsaw, Poland
| | - Paulina M Dominiak
- Biological and Chemical Research Centre, Department of Chemistry, University of Warsaw, Warsaw, Poland
| | - Amanda E Brandon
- Insulin Action and Energy Metabolism Laboratory, Division of Diabetes & Metabolism, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
- Faculty of Medicine and Health, School of Medical Sciences, University of Sydney, Sydney, New South Wales, Australia
| | - Emma Estevez
- Cellular & Molecular Metabolism Laboratory, Division of Diabetes & Metabolism, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
| | - Casey L Egan
- Cellular & Molecular Metabolism Laboratory, Division of Diabetes & Metabolism, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Florian Gruber
- Research Division of Biology and Pathobiology of the Skin, Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Martina Schweiger
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Jörg Menche
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Max Perutz Laboratories, Vienna, Austria
| | - Andreas Bergthaler
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Thomas Weichhart
- Center of Pathobiochemistry and Genetics, Institute of Medical Genetics, Medical University of Vienna, Vienna, Austria
| | - Kristaps Klavins
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre, Riga Technical University, Riga, Latvia
| | - Mark A Febbraio
- Cellular & Molecular Metabolism Laboratory, Division of Diabetes & Metabolism, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
| | - Omar Sharif
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria.
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria.
| | - Gernot Schabbauer
- Institute for Vascular Biology, Center for Physiology and Pharmacology, Medical University Vienna, Vienna, Austria.
- Christian Doppler Laboratory for Arginine Metabolism in Rheumatoid Arthritis and Multiple Sclerosis, Vienna, Austria.
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19
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Huang Y, Wang H, Hao Y, Lin H, Dong M, Ye J, Song L, Wang Y, Li Q, Shan B, Jiang Y, Li H, Shao Z, Kroemer G, Zhang H, Bai L, Jin T, Wang C, Ma Y, Cai Y, Ding C, Liu S, Pan Y, Jiang W, Zhou R. Myeloid PTEN promotes chemotherapy-induced NLRP3-inflammasome activation and antitumour immunity. Nat Cell Biol 2020; 22:716-727. [PMID: 32367047 DOI: 10.1038/s41556-020-0510-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 03/25/2020] [Indexed: 12/13/2022]
Abstract
PTEN is a dual-specificity phosphatase that is frequently mutated in human cancer, and its deficiency in cancer has been associated with therapy resistance and poor survival. Although the intrinsic tumour-suppressor function of PTEN has been well established, evidence of its role in the tumour immune microenvironment is lacking. Here, we show that chemotherapy-induced antitumour immune responses and tumour suppression rely on myeloid-cell PTEN, which is essential for chemotherapy-induced activation of the NLRP3 inflammasome and antitumour immunity. PTEN directly interacts with and dephosphorylates NLRP3 to enable NLRP3-ASC interaction, inflammasome assembly and activation. Importantly, supplementation of IL-1β restores chemotherapy sensitivity in mouse myeloid cells with a PTEN deficiency. Clinically, chemotherapy-induced IL-1β production and antitumour immunity in patients with cancer is correlated with PTEN expression in myeloid cells, but not tumour cells. Our results demonstrate that myeloid PTEN can determine chemotherapy responsiveness by promoting NLRP3-dependent antitumour immunity and suggest that myeloid PTEN might be a potential biomarker to predict chemotherapy responses.
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Affiliation(s)
- Yi Huang
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.,CAS Centre for Excellence in Cell and Molecular Biology, University of Science and Technology of China, Hefei, China
| | - Huanyu Wang
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Yize Hao
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Hualong Lin
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Menghao Dong
- Wannan Medical College, Wuhu, China.,Department of Oncology, the First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Jin Ye
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Lei Song
- National Center for Protein Sciences (Beijing), State Key Laboratory of Proteomics, Institute of Lifeomics, Beijing, China
| | - Yunzhi Wang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Institutes of Biomedical Sciences, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Qingqing Li
- Suzhou Institute of Systems Medicine, Suzhou, China
| | - Benjie Shan
- Department of Oncology, the First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Yizhou Jiang
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Shanghai Medical College, Key Laboratory of Breast Cancer in Shanghai, Innovation Center for Cell Signaling Network, Cancer Institute, Fudan University, Shanghai, China.,Department of Oncology, Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China
| | - Hongqi Li
- Fudan University Zhongshan Hospital, Shanghai Medical College, Shanghai, China
| | - Zhiming Shao
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Shanghai Medical College, Key Laboratory of Breast Cancer in Shanghai, Innovation Center for Cell Signaling Network, Cancer Institute, Fudan University, Shanghai, China.,Department of Oncology, Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China
| | - Guido Kroemer
- Suzhou Institute of Systems Medicine, Suzhou, China.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe 11 Labellisée Ligue Nationale Contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.,Institut National de la Santé et de la Recherche Médicale, Paris, France.,Université Pierre et Marie Curie, Paris, France.,Metabolomics and Cell Biology Platforms, Gustave Roussy Cancer Campus, Villejuif, France.,Pôle de Biologie, Hôpital Européen Georges Pompidou, AP-HP, Paris, France.,Department of Women's and Children's Health, Karolinska University Hospital, Stockholm, Sweden
| | - Huafeng Zhang
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Li Bai
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Tengchuan Jin
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Chao Wang
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Yuting Ma
- Suzhou Institute of Systems Medicine, Suzhou, China.,Center for Systems Medicine, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yongping Cai
- Department of Pathology, Anhui Medical University, Hefei, China
| | - Chen Ding
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Institutes of Biomedical Sciences, School of Life Sciences, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Suling Liu
- Fudan University Shanghai Cancer Center & Institutes of Biomedical Sciences, Shanghai Medical College, Key Laboratory of Breast Cancer in Shanghai, Innovation Center for Cell Signaling Network, Cancer Institute, Fudan University, Shanghai, China.
| | - Yueyin Pan
- Department of Oncology, the First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
| | - Wei Jiang
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
| | - Rongbin Zhou
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China. .,CAS Centre for Excellence in Cell and Molecular Biology, University of Science and Technology of China, Hefei, China.
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20
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Zebrafish pten Genes Play Relevant but Distinct Roles in Antiviral Immunity. Vaccines (Basel) 2020; 8:vaccines8020199. [PMID: 32357549 PMCID: PMC7349019 DOI: 10.3390/vaccines8020199] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/20/2020] [Accepted: 04/22/2020] [Indexed: 12/14/2022] Open
Abstract
The PTEN (phosphatase and TENsin homolog on chromosome 10) gene encodes a bifunctional phosphatase that acts as a tumor suppressor. However, PTEN has been implicated in different immune processes, including autophagy, inflammation, regulation of natural killer (NK) cell cytolytic activity and type I interferon responses. Unlike mammals, zebrafish possess two pten genes (ptena and ptenb). This study explores the involvement of both zebrafish pten genes in antiviral defense. Although ptena−/− and ptenb−/− larvae were more susceptible to Spring viremia of carp virus (SVCV), the viral replication rate was lower in the mutant larvae than in the wild-type larvae. We observed that both mutant lines showed alterations in the transcription of numerous genes, including those related to the type I interferon (IFN) system, cytolytic activity, autophagy and inflammation, and some of these genes were regulated in opposite ways depending on which pten gene was mutated. Even though the lower replication rate of SVCV could be associated with impaired autophagy in the mutant lines, the higher mortality observed in the ptena−/− and ptenb−/− larvae does not seem to be associated with an uncontrolled inflammatory response.
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21
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Underlying Ossification Phenotype in a Murine Model of Metastatic Synovial Sarcoma. Int J Mol Sci 2020; 21:ijms21072636. [PMID: 32290096 PMCID: PMC7177647 DOI: 10.3390/ijms21072636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/28/2020] [Accepted: 04/06/2020] [Indexed: 12/30/2022] Open
Abstract
Synovial sarcoma, an uncommon cancer, typically affects young adults. Survival rates range from 36% to 76%, decreasing significantly when metastases are present. Synovial sarcomas form in soft tissues, often near bones, with about 10% demonstrating ossification in the tumor. The literature is inconclusive on whether the presence of ossification portends a worse prognosis. To this end, we analyzed our genetic mouse models of synovial sarcoma to determine the extent of ossification in the tumors and its relationship with morbidity. We noted higher ossification within our metastatic mouse model of synovial sarcoma. Not only did we observe ossification within the tumors at a frequency of 7%, but an even higher frequency, 72%, of bone reactivity was detected by radiography. An enrichment of bone development genes was associated with primary tumors, even in the absence of an ossification phenotype. In spite of the ossification being intricately linked with the metastatic model, the presence of ossification was not associated with a faster or worse morbidity in the mice. Our conclusion is that both metastasis and ossification are dependent on time, but that they are independent of one another.
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22
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Taylor H, Laurence ADJ, Uhlig HH. The Role of PTEN in Innate and Adaptive Immunity. Cold Spring Harb Perspect Med 2019; 9:cshperspect.a036996. [PMID: 31501268 DOI: 10.1101/cshperspect.a036996] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The lipid and protein phosphatase and tensin homolog (PTEN) controls the differentiation and activation of multiple immune cells. PTEN acts downstream from T- and B-cell receptors, costimulatory molecules, cytokine receptors, integrins, and also growth factor receptors. Loss of PTEN activity in human and mice is associated with cellular and humoral immune dysfunction, lymphoid hyperplasia, and autoimmunity. Although most patients with PTEN hamartoma tumor syndrome (PHTS) have no immunological symptoms, a subclinical immune dysfunction is present in many, and clinical immunodeficiency in few. Comparison of the immune phenotype caused by PTEN haploinsufficiency in PHTS, phosphoinositide 3-kinase (PI3K) gain-of-function in activated PI3K syndrome, and mice with conditional biallelic Pten deletion suggests a threshold model in which coordinated activity of several phosphatases control the PI3K signaling in a cell-type-specific manner. Emerging evidence highlights the role of PTEN in polygenic autoimmune disorders, infection, and the immunological response to cancer. Targeting the PI3K axis is an emerging therapeutic avenue.
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Affiliation(s)
- Henry Taylor
- Department of Surgery and Cancer, Imperial College London, London SW7 2AZ, United Kingdom
| | - Arian D J Laurence
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Nuffield Department of Experimental Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, United Kingdom.,Department of Haematology, University College London Hospitals NHS Trust, London WC1E 6AG, United Kingdom
| | - Holm H Uhlig
- Translational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Nuffield Department of Experimental Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, United Kingdom.,Department of Paediatrics, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, United Kingdom.,NIHR Oxford Biomedical Research Centre, Oxford OX3 9DU, United Kingdom
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23
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Zhou M, Fang H, Du M, Li C, Tang R, Liu H, Gao Z, Ji Z, Ke B, Chen XL. The Modulation of Regulatory T Cells via HMGB1/PTEN/β-Catenin Axis in LPS Induced Acute Lung Injury. Front Immunol 2019; 10:1612. [PMID: 31402909 PMCID: PMC6669370 DOI: 10.3389/fimmu.2019.01612] [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] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 06/27/2019] [Indexed: 01/08/2023] Open
Abstract
Sepsis-induced acute lung injury (ALI)/acute respiratory distress syndrome (ARDS) remains the leading complication for mortality caused by bacterial infection. The regulatory T (Treg) cells appear to be an important modulator in resolving lung injury. Despite the extensive studies, little is known about the role of macrophage HMGB1/PTEN/β-catenin signaling in Treg development during ALI. Objectives: This study was designed to determine the roles and molecular mechanisms of HMGB1/PTEN/β-catenin signaling in mediating CD4+CD25+Foxp3+ Treg development in sepsis-induced lung injury in mice. Setting: University laboratory research of First Affiliated Hospital of Anhui Medical University. Subjects: PTEN/β-catenin Loxp and myeloid-specific knockout mice. Interventions: Groups of PTENloxp/β-cateninloxp and myeloid-specific PTEN/β-catenin knockout (PTENM−KO/β-cateninM−KO) mice were treated with LPS or recombinant HMGB1 (rHMGB1) to induce ALI. The effects of HMGB1-PTEN axis were further analyzed by in vitro co-cultures. Measures and Main Results: In a mouse model of ALI, blocking HMGB1 or myeloid-specific PTEN knockout (PTENM−KO) increased animal survival/body weight, reduced lung damage, increased TGF-β production, inhibited the expression of RORγt and IL-17, while promoting β-catenin signaling and increasing CD4+CD25+Foxp3+ Tregs in LPS- or rHMGB-induced lung injury. Notably, myeloid-specific β-catenin ablation (β-cateninM−KO) resulted in reduced animal survival and increased lung injury, accompanied by reduced CD4+CD25+Foxp3+ Tregs in rHMGB-induced ALI. Furthermore, disruption of macrophage HMGB1/PTEN or activation of β-catenin significantly increased CD4+CD25+Foxp3+ Tregs in vitro. Conclusions: HMGB1/PTEN/β-catenin signaling is a novel pathway that regulates Treg development and provides a potential therapeutic target in sepsis-induced lung injury.
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Affiliation(s)
- Min Zhou
- Neurocritical Care Unit, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.,Department of Neurosurgery, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Haoshu Fang
- Department of Pathophysiology, Anhui Medical University, Hefei, China
| | - Min Du
- Neurocritical Care Unit, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Changyong Li
- Department of Physiology, Wuhan University School of Basic Medical Sciences, Wuhan, China
| | - Rui Tang
- Neurocritical Care Unit, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Haiyan Liu
- Neurocritical Care Unit, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Zhi Gao
- Neurocritical Care Unit, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Zongshu Ji
- Neurocritical Care Unit, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Bibo Ke
- Department of Surgery, The Dumont-UCLA Transplant Center, David Geffen School of Medicine at UCLA, Los Angeles, CA, United States
| | - Xu-Lin Chen
- Department of Burns, The First Affiliated Hospital of Anhui Medical University, Hefei, China
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24
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Bai H, Wen J, Gong JP, Wu H, Yuan FC, Cao D, Wu YK, Lai X, Wang MH. Blockade of the Notch1/Jagged1 pathway in Kupffer cells aggravates ischemia-reperfusion injury of orthotopic liver transplantation in mice. Autoimmunity 2019; 52:176-184. [PMID: 31322442 DOI: 10.1080/08916934.2019.1637424] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Liver ischemia-reperfusion injury (IRI) represents a risk factor for early graft dysfunction and an obstacle to expanding donor pool in orthotopic liver transplantation (OLT). Kupffer cells (KCs) are the largest antigen-presenting cell (APC) group and the primary modulators of inflammation in liver tissues. The vital role of Notch1/Jagged1 pathway in mouse OLT model has been reported, however, its potential therapeutic mechanism is unknown. Here, we made use of short hairpin RNA-Jagged1 and AAV-Jagged1 to explore the effects of Notch1/Jagged1 pathway in OLT. In vitro, blockade of Notch1/Jagged1 pathway downregulated the expression of Hairy and enhancer of split-1 (Hes1) gene, which in turn increased the proinflammatory effects of KCs. Moreover, the anti-inflammatory effects of Notch1/Jagged1 pathway were induced by inhibiting Hes1/gene of phosphate and tension/protein kinase B/Toll-like receptor 4/nuclear factor kappa B (Hes1/PTEN/AKT/TLR4/NF-κB) axis in KCs. In vivo, we used a well-established mouse model of OLT to mimic clinical transplantation. Mice were stochastically divided into 6 groups: Sham group (n = 15); Normal saline (NS) group (n = 15); Adeno-associated virus-green fluorescent protein (AAV-GFP) group (n = 15); AAV-Jagged1 group (n = 15); Clodronate liposome (CL) group (n = 15); CL+AAV-Jagged1 group (n = 15) . After OLT the liver damage in AAV-Jagged1 group were significantly accentuated compared to the AAV-GFP group. While blockade of Jagged1 aftet clearence of KCs by CL would not lead to further liver injuries. Taken together, our study demonstrated that blockade of Notch1/Jagged1 pathway aggravates inflammation induced by lipopolysaccharide (LPS) via Hes1/PTEN/AKT/TLR4/NF-κB in KCs, and the blockade of Notch1/Jagged1 pathway in donor liver increased neutrophil/macrophage infiltration and hepatocellular apoptosis, which suggested the function of Notch1/Jagged1 pathway in mouse OLT and highlighted the protective function of Notch1/Jagged1 pathway in liver transplantation.
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Affiliation(s)
- He Bai
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Chongqing Medical University , Chongqing , People's Republic of China
| | - Jian Wen
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Chongqing Medical University , Chongqing , People's Republic of China
| | - Jian-Ping Gong
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Chongqing Medical University , Chongqing , People's Republic of China
| | - Hao Wu
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Chongqing Medical University , Chongqing , People's Republic of China
| | - Fang-Chao Yuan
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Chongqing Medical University , Chongqing , People's Republic of China
| | - Ding Cao
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Chongqing Medical University , Chongqing , People's Republic of China
| | - Ya-Kun Wu
- Department of Hepatobiliary Surgery, Suining Central Hospital , Sichuan , People's Republic of China
| | - Xing Lai
- Department of Hepatobiliary and Thyroid Breast Surgery, Tongnan District People's Hospital , Chongqing , People's Republic of China
| | - Meng-Hao Wang
- Department of Hepatobiliary Surgery, Second Affiliated Hospital of Chongqing Medical University , Chongqing , People's Republic of China
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25
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Chen K, Kolls JK. PTENtiating CFTR for Antimicrobial Immunity. Immunity 2019; 47:1014-1016. [PMID: 29262343 DOI: 10.1016/j.immuni.2017.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ivacaftor is a potentiator of the cystic fibrosis transmembrane conductance regulator (CFTR) that reduces Pseudomonas aeruginosa culture positivity in CF patients with unclear mechanisms. Riquelme et al. (2017) propose that improved CFTR trafficking could enhance P. aeruginosa clearance through activating the tumor suppressor PTEN.
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Affiliation(s)
- Kong Chen
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Jay K Kolls
- Center for Translational Research in Infection and Inflammation, Tulane School of Medicine, New Orleans, LA, USA.
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26
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Ren W, Zhang X, Li W, Feng Q, Feng H, Tong Y, Rong H, Wang W, Zhang D, Zhang Z, Tu S, Zhu X, Zhang Q. Exosomal miRNA-107 induces myeloid-derived suppressor cell expansion in gastric cancer. Cancer Manag Res 2019; 11:4023-4040. [PMID: 31190980 PMCID: PMC6511657 DOI: 10.2147/cmar.s198886] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 02/20/2019] [Indexed: 12/23/2022] Open
Abstract
Background: Myeloid-derived suppressor cells (MDSCs) promote immunosuppression in the tumor microenvironment, support tumor growth and survival, and may contribute to immunotherapy resistance. Recent studies showed that tumor-derived exosomes (TDEs) can induce MDSCs accumulation and expansion, the mechanisms of which are largely unknown. Methods: The morphologies and sizes of the exosomes was observed by using a JEM-1400 transmission electron microscope. MicroRNA(miR)-107 and ARG1, DICER1, PTEN, PI3K, AKT, mTOR, and NF-kB mRNAs were quantified by quantitative reverse tanscription PCR. Dual-Luciferase Reports Assay were used to examine the expression of genes which was targeted by miR-107. The expression of proteins were analyzed by using western blot. Results: MiR-107 was not only overexpressed in gastric cancer cells but also enriched in their secreted TDEs. Also, these miR-107 enriched TDEs could be taken up by HLA-DR-CD33+MDSCs, where miR-107 was able to target and suppress expression of DICER1 and PTEN genes. Dampened DICER1 expression supported expansion of MDSCs , while decreased PTEN led to activation of the PI3K pathway, resulting in increased ARG1 expression. Furthemore, gastric cancer-derived miR-107 TDEs, when dosed intravenously into mice, were also capable of inducing expansion of CD11b+Gr1+/high MDSCs in mouse peripheral blood and altering expression of DICER1, PTEN, ARG1, and NOS2 in the MDSCs. Conclusions: Our findings demonstrate for the first time that gastric cancer-secreted exosomes are able to deliver miR-107 to the host MDSCs where they induce their expansion and activition by targeting DICER1 and PTEN genes, thereby may provide novel cancer therapeutics target for gastric cancer.
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Affiliation(s)
- WeiHong Ren
- Department of Histology and Embryology, College of Basic Medicine, Zhengzhou University, Zhengzhou, Henan Province, People's Republic of China.,Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - XuRan Zhang
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - WenBo Li
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - Qian Feng
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - HuiJie Feng
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - Yan Tong
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - Hao Rong
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - Wei Wang
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - Dai Zhang
- Department of Laboratory Medicine, The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - ZhenQiang Zhang
- Immunology Laboratory of Chinese Medicine, Henan University of Chinese Medicine, Zhengzhou, Henan Province, People's Republic of China
| | - ShiChun Tu
- Neurodegenerative Disease Center, Scintillon Institute, San Diego, CA, USA
| | - XiaoYan Zhu
- Department of Histology and Embryology, College of Basic Medicine, Zhengzhou University, Zhengzhou, Henan Province, People's Republic of China
| | - QinXian Zhang
- Department of Histology and Embryology, College of Basic Medicine, Zhengzhou University, Zhengzhou, Henan Province, People's Republic of China
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27
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Sisti F, Wang S, Brandt SL, Glosson-Byers N, Mayo LD, Son YM, Sturgeon S, Filgueiras L, Jancar S, Wong H, Dela Cruz CS, Andrews N, Alves-Filho JC, Cunha FQ, Serezani CH. Nuclear PTEN enhances the maturation of a microRNA regulon to limit MyD88-dependent susceptibility to sepsis. Sci Signal 2018; 11:11/528/eaai9085. [PMID: 29717063 DOI: 10.1126/scisignal.aai9085] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Sepsis-induced organ damage is caused by systemic inflammatory response syndrome (SIRS), which results in substantial comorbidities. Therefore, it is of medical importance to identify molecular brakes that can be exploited to dampen inflammation and prevent the development of SIRS. We investigated the role of phosphatase and tensin homolog (PTEN) in suppressing SIRS, increasing microbial clearance, and preventing lung damage. Septic patients and mice with sepsis exhibited increased PTEN expression in leukocytes. Myeloid-specific Pten deletion in an animal model of sepsis increased bacterial loads and cytokine production, which depended on enhanced myeloid differentiation primary response gene 88 (MyD88) abundance and resulted in mortality. PTEN-mediated induction of the microRNAs (miRNAs) miR125b and miR203b reduced the abundance of MyD88. Loss- and gain-of-function assays demonstrated that PTEN induced miRNA production by associating with and facilitating the nuclear localization of Drosha-Dgcr8, part of the miRNA-processing complex. Reconstitution of PTEN-deficient mouse embryonic fibroblasts with a mutant form of PTEN that does not localize to the nucleus resulted in retention of Drosha-Dgcr8 in the cytoplasm and impaired production of mature miRNAs. Thus, we identified a regulatory pathway involving nuclear PTEN-mediated miRNA generation that limits the production of MyD88 and thereby limits sepsis-associated mortality.
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Affiliation(s)
- Flavia Sisti
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Soujuan Wang
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Stephanie L Brandt
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA.,Division of Infectious Diseases, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Nicole Glosson-Byers
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Lindsey D Mayo
- Herman B Wells Center for Pediatric Research, Departments of Pediatrics and Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Young Min Son
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Sarah Sturgeon
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Luciano Filgueiras
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA.,Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil
| | - Sonia Jancar
- Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo 05508-000, Brazil
| | - Hector Wong
- Division of Critical Care Medicine, Cincinnati Children's Hospital Medical Center and Cincinnati Children's Hospital Research Foundation, Cincinnati, OH 45229, USA
| | - Charles S Dela Cruz
- Section of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Nathaniel Andrews
- Section of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jose Carlos Alves-Filho
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto 14049-900, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto 14049-900, Brazil
| | - C Henrique Serezani
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA. .,Division of Infectious Diseases, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA
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28
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Lu L, Yue S, Jiang L, Li C, Zhu Q, Ke M, Lu H, Wang X, Busuttil RW, Ying QL, Kupiec-Weglinski JW, Ke B. Myeloid Notch1 deficiency activates the RhoA/ROCK pathway and aggravates hepatocellular damage in mouse ischemic livers. Hepatology 2018; 67:1041-1055. [PMID: 29024000 PMCID: PMC5826840 DOI: 10.1002/hep.29593] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/14/2017] [Accepted: 10/09/2017] [Indexed: 12/16/2022]
Abstract
UNLABELLED Notch signaling plays an emerging role in the regulation of immune cell development and function during inflammatory response. Activation of the ras homolog gene family member A/Rho-associated protein kinase (ROCK) pathway promotes leukocyte accumulation in tissue injury. However, it remains unknown whether Notch signaling regulates ras homolog gene family member A/ROCK-mediated immune responses in liver ischemia and reperfusion (IR) injury. This study investigated intracellular signaling pathways regulated by Notch receptors in the IR-stressed liver and in vitro. In a mouse model of IR-induced liver inflammatory injury, we found that mice with myeloid-specific Notch1 knockout showed aggravated hepatocellular damage, with increased serum alanine aminotransferase levels, hepatocellular apoptosis, macrophage/neutrophil trafficking, and proinflammatory mediators compared to Notch1-proficient controls. Unlike in the controls, myeloid Notch1 ablation diminished hairy and enhancer of split-1 (Hes1) and augmented c-Jun N-terminal kinase (JNK)/stress-activated protein kinase-associated protein 1 (JSAP1), JNK, ROCK1, and phosphatase and tensin homolog (PTEN) activation in ischemic livers. Disruption of JSAP1 in myeloid-specific Notch1 knockout livers improved hepatocellular function and reduced JNK, ROCK1, PTEN, and toll-like receptor 4 activation. Moreover, ROCK1 knockdown inhibited PTEN and promoted Akt, leading to depressed toll-like receptor 4. In parallel in vitro studies, transfection of lentivirus-expressing Notch1 intracellular domain promoted Hes1 and inhibited JSAP1 in lipopolysaccharide-stimulated bone marrow-derived macrophages. Hes1 deletion enhanced JSAP1/JNK activation, whereas clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9-mediated JSAP1 knockout diminished ROCK1/PTEN and toll-like receptor 4 signaling. CONCLUSION Myeloid Notch1 deficiency activates the ras homolog gene family member A/ROCK pathway and exacerbates hepatocellular injury by inhibiting transcriptional repressor Hes1 and inducing scaffold protein JSAP1 in IR-triggered liver inflammation; our findings underscore the crucial role of the Notch-Hes1 axis as a novel regulator of innate immunity-mediated inflammation and imply the therapeutic potential for the management of organ IR injury in transplant recipients. (Hepatology 2018;67:1041-1055).
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Affiliation(s)
- Ling Lu
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Shi Yue
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA,Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC, Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Longfeng Jiang
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Changyong Li
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Qiang Zhu
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Michael Ke
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Hao Lu
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Xuehao Wang
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Ronald W. Busuttil
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Qi-Long Ying
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC, Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Jerzy W. Kupiec-Weglinski
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Bibo Ke
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
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29
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Riquelme SA, Hopkins BD, Wolfe AL, DiMango E, Kitur K, Parsons R, Prince A. Cystic Fibrosis Transmembrane Conductance Regulator Attaches Tumor Suppressor PTEN to the Membrane and Promotes Anti Pseudomonas aeruginosa Immunity. Immunity 2017; 47:1169-1181.e7. [PMID: 29246444 PMCID: PMC5738266 DOI: 10.1016/j.immuni.2017.11.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/11/2017] [Accepted: 11/06/2017] [Indexed: 12/14/2022]
Abstract
The tumor suppressor PTEN controls cell proliferation by regulating phosphatidylinositol-3-kinase (PI3K) activity, but the participation of PTEN in host defense against bacterial infection is less well understood. Anti-inflammatory PI3K-Akt signaling is suppressed in patients with cystic fibrosis (CF), a disease characterized by hyper-inflammatory responses to airway infection. We found that Ptenl-/- mice, which lack the NH2-amino terminal splice variant of PTEN, were unable to eradicate Pseudomonas aeruginosa from the airways and could not generate sufficient anti-inflammatory PI3K activity, similar to what is observed in CF. PTEN and the CF transmembrane conductance regulator (CFTR) interacted directly and this interaction was necessary to position PTEN at the membrane. CF patients under corrector-potentiator therapy, which enhances CFTR transport to the membrane, have increased PTEN amounts. These findings suggest that improved CFTR trafficking could enhance P. aeruginosa clearance from the CF airway by activating PTEN-mediated anti-bacterial responses and might represent a therapeutic strategy.
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Affiliation(s)
| | | | - Andrew L Wolfe
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Emily DiMango
- Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Kipyegon Kitur
- Department of Pediatrics, Columbia University, New York, NY 10032, USA
| | - Ramon Parsons
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Alice Prince
- Department of Pediatrics, Columbia University, New York, NY 10032, USA.
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30
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The functions of tumor suppressor PTEN in innate and adaptive immunity. Cell Mol Immunol 2017; 14:581-589. [PMID: 28603282 DOI: 10.1038/cmi.2017.30] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 04/10/2017] [Accepted: 04/10/2017] [Indexed: 12/20/2022] Open
Abstract
The tumor suppressor phosphatase and tensin homolog (PTEN) is a lipid and protein phosphatase that is able to antagonize the PI3K/AKT pathway and inhibit tumor growth. PTEN also possesses phosphatase-independent functions. Genetic alterations of PTEN may lead to the deregulation of cell proliferation, survival, differentiation, energy metabolism and cellular architecture and mobility. Although the role of PTEN in tumor suppression is extensively documented and well established, the evidence for its roles in immunity did not start to accumulate until recently. In this review, we will focus on the newly discovered functions of PTEN in the regulation of innate and adaptive immunity, including antiviral responses.
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31
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Zhu Q, Li C, Wang K, Yue S, Jiang L, Ke M, Busuttil RW, Kupiec-Weglinski JW, Zhang F, Lu L, Ke B. Phosphatase and tensin homolog-β-catenin signaling modulates regulatory T cells and inflammatory responses in mouse liver ischemia/reperfusion injury. Liver Transpl 2017; 23:813-825. [PMID: 28152578 PMCID: PMC5449221 DOI: 10.1002/lt.24735] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 01/19/2017] [Indexed: 12/06/2022]
Abstract
The phosphatase and tensin homolog (PTEN) deleted on chromosome 10 plays an important role in regulating T cell activation during inflammatory response. Activation of β-catenin is crucial for maintaining immune homeostasis. This study investigates the functional roles and molecular mechanisms by which PTEN-β-catenin signaling promotes regulatory T cell (Treg) induction in a mouse model of liver ischemia/reperfusion injury (IRI). We found that mice with myeloid-specific phosphatase and tensin homolog knockout (PTENM-KO ) exhibited reduced liver damage as evidenced by decreased levels of serum alanine aminotransferase, intrahepatic macrophage trafficking, and proinflammatory mediators compared with the PTEN-proficient (floxed phosphatase and tensin homolog [PTENFL/FL ]) controls. Disruption of myeloid PTEN-activated b-catenin promoted peroxisome proliferator-activated receptor gamma (PPARγ)-mediated Jagged-1/Notch signaling and induced forkhead box P3 (FOXP3)1 Tregs while inhibiting T helper 17 cells. However, blocking of Notch signaling by inhibiting γ-secretase reversed myeloid PTEN deficiency-mediated protection in ischemia/reperfusion-triggered liver inflammation with reduced FOXP3+ and increased retinoid A receptor-related orphan receptor gamma t-mediated interleukin 17A expression in ischemic livers. Moreover, knockdown of β-catenin or PPARγ in PTEN-deficient macrophages inhibited Jagged-1/Notch activation and reduced FOXP3+ Treg induction, leading to increased proinflammatory mediators in macrophage/T cell cocultures. In conclusion, our findings demonstrate that PTEN-β-catenin signaling is a novel regulator involved in modulating Treg development and provides a potential therapeutic target in liver IRI. Liver Transplantation 23 813-825 2017 AASLD.
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Affiliation(s)
- Qiang Zhu
- Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA,Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Changyong Li
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA,Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Kunpeng Wang
- Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Shi Yue
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research at USC, Department of Stem Cell Biology & Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Longfeng Jiang
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA
| | - Michael. Ke
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA
| | - Ronald. W. Busuttil
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA
| | - Jerzy. W. Kupiec-Weglinski
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA
| | - Feng Zhang
- Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,Corresponding authors: Bibo Ke, MD, PhD, The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA. Tel: (310) 794-7557; Fax: (310) 267-2367; , Ling Lu, MD, PhD or Feng Zhang, MD, PhD, Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China. Tel: +86 25 83718836; Fax: +86 25 83672106. , or
| | - Ling Lu
- Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China,Corresponding authors: Bibo Ke, MD, PhD, The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA. Tel: (310) 794-7557; Fax: (310) 267-2367; , Ling Lu, MD, PhD or Feng Zhang, MD, PhD, Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China. Tel: +86 25 83718836; Fax: +86 25 83672106. , or
| | - Bibo Ke
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA,Corresponding authors: Bibo Ke, MD, PhD, The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA. Tel: (310) 794-7557; Fax: (310) 267-2367; , Ling Lu, MD, PhD or Feng Zhang, MD, PhD, Translational Research Medicine Center, Affiliated Jiangning Hospital, and Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China. Tel: +86 25 83718836; Fax: +86 25 83672106. , or
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32
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Hwang I, Mori K, Ohtani K, Matsuda Y, Roy N, Kim Y, Suzuki Y, Wakamiya N. Collectin Kidney 1 Plays an Important Role in Innate Immunity against Streptococcus pneumoniae Infection. J Innate Immun 2017; 9:217-228. [PMID: 28068663 DOI: 10.1159/000453316] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 11/08/2016] [Indexed: 01/07/2023] Open
Abstract
Collectins are C-type lectins that are involved in innate immunity as pattern recognition molecules. Recently, collectin kidney 1 (CL-K1) has been discovered, and in vitro studies have shown that CL-K1 binds to microbes and activates the lectin complement pathway. However, in vivo functions of CL-K1 against microbes have not been elucidated. To investigate the biological functions of CL-K1, we generated CL-K1 knockout (CL-K1-/-) mice and then performed a Streptococcus pneumoniae infection analysis. First, we found that recombinant human CL-K1 bound to S. pneumoniae in a calcium-dependent manner, and induced complement activation. CL-K1-/- mice sera formed less C3 deposition on S. pneumoniae. Furthermore, immunofluorescence analysis in the wild-type (WT) mice demonstrated that CL-K1 and C3 were localized on S. pneumoniae in infected lungs. CL-K1-/- mice revealed decreased phagocytosis of S. pneumoniae. Consequently, less S. pneumoniae clearance was observed in their lungs. CL-K1-/- mice showed severe pulmonary inflammation and weight loss in comparison with WT mice. Finally, the decreased clearance and severe pulmonary inflammation caused by S. pneumoniae infection might cause higher CL-K1-/- mice lethality. Our results suggest that CL-K1 might play an important role in host protection against S. pneumoniae infection through the activation of the lectin complement pathway.
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Affiliation(s)
- Insu Hwang
- Department of Microbiology and Immunochemistry, Asahikawa Medical University, Asahikawa, Japan
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33
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Morioka S, Nigorikawa K, Sasaki J, Hazeki K, Kasuu Y, Sasaki T, Hazeki O. Myeloid cell-specific inositol polyphosphate-4-phosphatase type I knockout mice impair bacteria clearance in a murine peritonitis model. Innate Immun 2016; 22:444-51. [DOI: 10.1177/1753425916652714] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 05/10/2016] [Indexed: 11/17/2022] Open
Abstract
Phosphatidylinositol 3-kinase (PI3K)/Akt signaling has been implicated in the anti-inflammatory response in a mouse model of endotoxemia and sepsis. The present study focused on the role of inositol polyphosphate-4-phosphatase type I (Inpp4a), which dephosphorylates PtdIns(3,4)P2 to PtdIns(3)P, in bacterial infections. We prepared myeloid cell-specific Inpp4a-conditional knockout mice. Macrophages from these mice showed increased Akt phosphorylation and reduced production of inflammatory cytokines in response to LPS or Escherichia coli in vitro. The Inpp4a knockout mice survived for a shorter time than wild type mice after i.p. infection with E. coli, with less production of inflammatory cytokines. Additionally, E. coli clearance from blood and lung was significantly impaired in the knockout mice. A likely mechanism is that the Inpp4a-catalyzed dephosphorylation of PtdIns(3,4)P2 down-regulates Akt pathways, which, in turn, increases the production of inflammatory mediators. This mechanism at least fits the decreased E. coli clearance and short survival in the Inpp4a knockout mice.
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Affiliation(s)
- Shin Morioka
- Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
| | - Kiyomi Nigorikawa
- Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
| | - Junko Sasaki
- Department of Pathology and Immunology, Akita University School of Medicine, Akita 010-8543, Japan
| | - Kaoru Hazeki
- Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
| | - Yoshihiro Kasuu
- Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
| | - Takehiko Sasaki
- Department of Pathology and Immunology, Akita University School of Medicine, Akita 010-8543, Japan
| | - Osamu Hazeki
- Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
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Xie CY, Kong JR, Zhao CS, Xiao YC, Peng T, Liu Y, Wang WN. Molecular characterization and function of a PTEN gene from Litopenaeus vannamei after Vibrio alginolyticus challenge. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2016; 59:77-88. [PMID: 26801100 DOI: 10.1016/j.dci.2016.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/11/2016] [Accepted: 01/11/2016] [Indexed: 06/05/2023]
Abstract
PTEN, a tumor suppressor gene, suppresses cell survival, growth, apoptosis, cell migration and DNA damage repair by inhibiting the PI3K/AKT signaling pathway. In this study, the full-length Litopenaeus vannamei PTEN (LvPTEN) cDNA was obtained, containing a 5'UTR of 59bp, an ORF of 1269bp and a 3'UTR of 146bp besides the poly (A) tail. The PTEN gene encoded a protein of 422 amino acids with an estimated molecular mass of 48.3 KDa and a predicted isoelectric point (pI) of 7.6. Subcellular localization analysis revealed that LvPTEN was distributed in both cytoplasm and nucleus, and the tissue distribution patterns showed that LvPTEN was ubiquitously expressed in all the examined tissues. Vibrio alginolyticus challenge induced upregulation of LvPTEN expression. Moreover, RNAi knock-down of LvPTEN in vivo significantly increased the expression of LvAKT mRNA, while reducing that of the downstream apoptosis genes LvP53 and LvCaspase3. LvPTEN knock-down also caused a sharp increase in cumulative mortality, bacterial numbers, and DNA damage in the hemolymph of L. vannamei following V. alginolyticus challenge, together with a sharp decrease in the total hemocyte count (THC). These results suggested that LvPTEN may participate in apoptosis via the PI3K/AKT signaling pathway in L. vannamei, and play an important role in shrimp innate immunity.
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Affiliation(s)
- C-y Xie
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - J-r Kong
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - C-s Zhao
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - Y-c Xiao
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - T Peng
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - Y Liu
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - W-n Wang
- Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, College of Life Science, South China Normal University, Guangzhou 510631, PR China.
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Kuttke M, Sahin E, Pisoni J, Percig S, Vogel A, Kraemmer D, Hanzl L, Brunner JS, Paar H, Soukup K, Halfmann A, Dohnal AM, Steiner CW, Blüml S, Basilio J, Hochreiter B, Salzmann M, Hoesel B, Lametschwandtner G, Eferl R, Schmid JA, Schabbauer G. Myeloid PTEN deficiency impairs tumor-immune surveillance via immune-checkpoint inhibition. Oncoimmunology 2016; 5:e1164918. [PMID: 27622019 PMCID: PMC5006931 DOI: 10.1080/2162402x.2016.1164918] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 03/03/2016] [Accepted: 03/08/2016] [Indexed: 12/14/2022] Open
Abstract
Tumor-host interaction is determined by constant immune surveillance, characterized by tumor infiltration of myeloid and lymphoid cells. A malfunctioning or diverted immune response promotes tumor growth and metastasis. Recent advances had been made, by treating of certain tumor types, such as melanoma, with T-cell checkpoint inhibitors. This highlights the importance of understanding the molecular mechanisms underlying the crosstalk between tumors and their environment, in particular myeloid and lymphoid cells. Our aim was to study the contribution of the myeloid PI3K/PTEN-signaling pathway in the regulation of tumor-immune surveillance in murine models of cancer. We made use of conditional PTEN-deficient mice, which exhibit sustained activation of the PI3K-signaling axis in a variety of myeloid cell subsets such as macrophages and dendritic cells (DCs). In colitis-associated colon cancer (CAC), mice deficient in myeloid PTEN showed a markedly higher tumor burden and decreased survival. We attributed this observation to the increased presence of immune-modulatory conventional CD8α(+) DCs in the spleen, whereas other relevant myeloid cell subsets were largely unaffected. Notably, we detected enhanced surface expression of PD-L1 and PD-L2 on these DCs. As a consequence, tumoricidal T-cell responses were hampered or redirected. Taken together, our findings indicated an unanticipated role for the PI3K/PTEN-signaling axis in the functional regulation of splenic antigen-presenting cells (APCs). Our data pointed at potential, indirect, tumoricidal effects of subclass-specific PI3K inhibitors, which are currently under clinical investigation for treatment of tumors, via myeloid cell activation.
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Affiliation(s)
- M Kuttke
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - E Sahin
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - J Pisoni
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - S Percig
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - A Vogel
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - D Kraemmer
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - L Hanzl
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - J S Brunner
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - H Paar
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
| | - K Soukup
- St. Anna Children's Cancer Research Institute , Vienna, Austria
| | - A Halfmann
- St. Anna Children's Cancer Research Institute , Vienna, Austria
| | - A M Dohnal
- St. Anna Children's Cancer Research Institute , Vienna, Austria
| | - C W Steiner
- Department of Rheumatology Internal Medicine III, Medical University of Vienna , Vienna, Austria
| | - S Blüml
- Department of Rheumatology Internal Medicine III, Medical University of Vienna , Vienna, Austria
| | - J Basilio
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology Medical University of Vienna , Vienna, Austria
| | - B Hochreiter
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology Medical University of Vienna , Vienna, Austria
| | - M Salzmann
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology Medical University of Vienna , Vienna, Austria
| | - B Hoesel
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology Medical University of Vienna , Vienna, Austria
| | | | - R Eferl
- Institute of Cancer Research, Internal Medicine I, Medical University of Vienna , Vienna, Austria
| | - J A Schmid
- Institute for Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology Medical University of Vienna , Vienna, Austria
| | - G Schabbauer
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna Vienna, Austria
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Sustained PI3K Activation exacerbates BLM-induced Lung Fibrosis via activation of pro-inflammatory and pro-fibrotic pathways. Sci Rep 2016; 6:23034. [PMID: 26971883 PMCID: PMC4789787 DOI: 10.1038/srep23034] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 02/23/2016] [Indexed: 02/06/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a life-threatening disease with limited treatment options. Additionally, the lack of a complete understanding of underlying immunological mechanisms underscores the importance of discovering novel options for therapeutic intervention. Since the PI3K/PTEN pathway in myeloid cells influences their effector functions, we wanted to elucidate how sustained PI3K activity induced by cell-type specific genetic deficiency of its antagonist PTEN modulates IPF, in a murine model of bleomycin-induced pulmonary fibrosis (BIPF). We found that myeloid PTEN deficient mice (PTENMyKO), after induction of BIPF, exhibit increased TGF-β1 activation, mRNA expression of pro-collagens and lysyl oxidase as well as augmented collagen deposition compared to wild-type littermates, leading to enhanced morbidity and decreased survival. Analysis of alveolar lavage and lung cell composition revealed that PTENMyKO mice exhibit reduced numbers of macrophages and T-cells in response to bleomycin, indicating an impaired recruitment function. Interestingly, we found dysregulated macrophage polarization as well as elevated expression and release of the pro-fibrotic cytokines IL-6 and TNF-α in PTENMyKO mice during BIPF. This might point to an uncontrolled wound healing response in which the inflammatory as well as tissue repair mechanisms proceed in parallel, thereby preventing resolution and at the same time promoting extensive fibrosis.
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Zhou M, Zhang Y, Chen X, Zhu J, Du M, Zhou L, Zhang L, Wang W, Sun G. PTEN-Foxo1 signaling triggers HMGB1-mediated innate immune responses in acute lung injury. Immunol Res 2016; 62:95-105. [PMID: 25759027 PMCID: PMC4424276 DOI: 10.1007/s12026-015-8639-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
PTEN is a multifunctional phosphatase that regulates immune responses through a PI3K/Akt signaling cascade. HMGB1 plays an important role in the initiation of innate immune responses to induce acute lung injury (ALI). This study was designed to investigate the role of PTEN/Foxo1 signaling in the regulation of in vivo and in vitro innate immune responses in ALI. Using a mouse model of ALI, wild-type (WT) and myeloid-specific PTEN knockout (PTEN(M-KO)) mice were instilled with a recombinant HMGB1 (rHMGB1) or PBS. In some experiments, Foxo1 siRNA or non-specific siRNA was injected into mice 6 h prior to rHMGB1 instillation into lung. We found that rHMGB1 treatment in WT mice increased the expression of PTEN, Foxo1, TLR4, and NF-κB in alveolar macrophages from WT mice. However, macrophage-specific PTEN ablation resulted in reduced Foxo1 and TLR4 while increasing β-catenin (Ser552) and Akt (Ser473) phosphorylation in these cells. Knockdown of Foxo1 with siRNA administration in WT mice ameliorated lung injury and inhibited myeloperoxidase activity followed by rHMGB1 treatment, which was accompanied by decreased mRNA expression coding for TNF-α, IL-1β, MIP2, and IP-10. Moreover, Foxo1 knockdown inhibited the expression of TLR4-dependent IRF3 and IFN-β both in vitro and in vivo. These results demonstrate that PTEN/Foxo1 signaling is critical for triggering HMGB1-mediated innate TLR4 activation during ALI. By identifying the molecular signaling pathways within innate immune system, our studies provide the potential therapeutic targets for ALI.
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Affiliation(s)
- Min Zhou
- Department of Respiratory Medicine, The First Affiliated Hospital of Anhui Medical University, JiXi Road 218, Hefei, 230022, Anhui, People's Republic of China
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Sahin E, Brunner JS, Kral JB, Kuttke M, Hanzl L, Datler H, Paar H, Neuwinger N, Saferding V, Zinser E, Halfmann A, Soukup K, Hainzl E, Lohmeyer T, Niederreiter B, Haider T, Dohnal AM, Krönke G, Blüml S, Schabbauer G. Loss of Phosphatase and Tensin Homolog in APCs Impedes Th17-Mediated Autoimmune Encephalomyelitis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2015; 195:2560-70. [PMID: 26246144 DOI: 10.4049/jimmunol.1402511] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 07/12/2015] [Indexed: 12/22/2022]
Abstract
The PI3K signaling cascade in APCs has been recognized as an essential pathway to initiate, maintain, and resolve immune responses. In this study, we demonstrate that a cell type-specific loss of the PI3K antagonist phosphatase and tensin homolog (PTEN) in myeloid cells renders APCs toward a regulatory phenotype. APCs deficient for PTEN exhibit reduced activation of p38 MAPK and reduced expression of T cell-polarizing cytokines. Furthermore, PTEN deficiency leads to upregulation of markers for alternative activation, such as Arginase 1, with concomitant downregulation of inducible NO synthase in APCs in vitro and in vivo. As a result, T cell polarization was dysfunctional in PTEN(-/-) APCs, in particular affecting the Th17 cell subset. Intriguingly, mice with cell type-specific deletions of PTEN-targeting APCs were protected from experimental autoimmune encephalomyelitis, which was accompanied by a pronounced reduction of IL-17- and IL-22-producing autoreactive T cells and reduced CNS influx of classically activated monocytes/macrophages. These observations support the notion that activation of the PI3K signaling cascade promotes regulatory APC properties and suppresses pathogenic T cell polarization, thereby reducing the clinical symptoms and pathology of experimental autoimmune encephalomyelitis.
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Affiliation(s)
- Emine Sahin
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Julia S Brunner
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Julia B Kral
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Mario Kuttke
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Leslie Hanzl
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Hannes Datler
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Hannah Paar
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Nick Neuwinger
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Victoria Saferding
- Division of Rheumatology, Internal Medicine III, Medical University of Vienna, A-1090 Vienna, Austria
| | - Elisabeth Zinser
- Department of Immune Modulation, Department of Dermatology, University Hospital Erlangen, 91052 Erlangen, Germany
| | - Angela Halfmann
- St. Anna Children's Cancer Research Institute, A-1090 Vienna, Austria
| | - Klara Soukup
- St. Anna Children's Cancer Research Institute, A-1090 Vienna, Austria
| | - Eva Hainzl
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Tobias Lohmeyer
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Birgit Niederreiter
- Division of Rheumatology, Internal Medicine III, Medical University of Vienna, A-1090 Vienna, Austria
| | - Thomas Haider
- University Clinic for Trauma Surgery, Medical University of Vienna, A-1090 Vienna, Austria
| | | | - Gerhard Krönke
- Department of Internal Medicine 3, University Hospital Erlangen, 91052 Erlangen, Germany; Institute for Clinical Immunology, University Hospital Erlangen, 91052 Erlangen, Germany; and Nikolaus Fiebiger Center of Molecular Medicine, University Hospital Erlangen, University of Erlangen-Nuremberg, 91052 Erlangen, Germany
| | - Stephan Blüml
- Division of Rheumatology, Internal Medicine III, Medical University of Vienna, A-1090 Vienna, Austria;
| | - Gernot Schabbauer
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria;
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PI3K inhibitors in inflammation, autoimmunity and cancer. Curr Opin Pharmacol 2015; 23:82-91. [PMID: 26093105 PMCID: PMC4518027 DOI: 10.1016/j.coph.2015.05.017] [Citation(s) in RCA: 219] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 05/29/2015] [Indexed: 12/20/2022]
Abstract
The healthy immune system protects against infection and malignant transformation without causing significant damage to host tissues. Immune dysregulation results in diverse pathologies including autoimmune disease, chronic inflammatory disorders, allergies as well as immune deficiencies and cancer. Phosphoinositide 3-kinase (PI3K) signalling has been shown to be a key pathway in the regulation of the immune response and continues to be the focus of intense research. In recent years we have gained detailed understanding of PI3K signalling, and saw the development of potent and highly selective small molecule inhibitors, of which several are currently in clinical trials for the treatment of immune-related disorders and cancer. The role of PI3K signalling in the immune response has been the subject of detailed reviews; here we focus on relevant recent progress in pre-clinical and clinical development of PI3K inhibitors.
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Stolberg VR, McCubbrey AL, Freeman CM, Brown JP, Crudgington SW, Taitano SH, Saxton BL, Mancuso P, Curtis JL. Glucocorticoid-Augmented Efferocytosis Inhibits Pulmonary Pneumococcal Clearance in Mice by Reducing Alveolar Macrophage Bactericidal Function. THE JOURNAL OF IMMUNOLOGY 2015; 195:174-84. [PMID: 25987742 DOI: 10.4049/jimmunol.1402217] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 04/22/2015] [Indexed: 12/31/2022]
Abstract
Inhaled corticosteroids (ICS) increase community-acquired pneumonia (CAP) incidence in patients with chronic obstructive pulmonary disease (COPD) by unknown mechanisms. Apoptosis is increased in the lungs of COPD patients. Uptake of apoptotic cells (ACs) ("efferocytosis") by alveolar macrophages (AMøs) reduces their ability to combat microbes, including Streptococcus pneumoniae, the most common cause of CAP in COPD patients. Having shown that ICS significantly increase AMø efferocytosis, we hypothesized that this process, termed glucocorticoid-augmented efferocytosis, might explain the association of CAP with ICS therapy in COPD. To test this hypothesis, we studied the effects of fluticasone, AC, or both on AMøs of C57BL/6 mice in vitro and in an established model of pneumococcal pneumonia. Fluticasone plus AC significantly reduced TLR4-stimulated AMø IL-12 production, relative to either treatment alone, and decreased TNF-α, CCL3, CCL5, and keratinocyte-derived chemoattractant/CXCL1, relative to AC. Mice treated with fluticasone plus AC before infection with viable pneumococci developed significantly more lung CFUs at 48 h. However, none of the pretreatments altered inflammatory cell recruitment to the lungs at 48 h postinfection, and fluticasone plus AC less markedly reduced in vitro mediator production to heat-killed pneumococci. Fluticasone plus AC significantly reduced in vitro AMø killing of pneumococci, relative to other conditions, in part by delaying phagolysosome acidification without affecting production of reactive oxygen or nitrogen species. These results support glucocorticoid-augmented efferocytosis as a potential explanation for the epidemiological association of ICS therapy of COPD patients with increased risk for CAP, and establish murine experimental models to dissect underlying molecular mechanisms.
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Affiliation(s)
| | | | - Christine M Freeman
- Research Service, VA Ann Arbor Healthcare System, Ann Arbor, MI 48105; Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Health System, Ann Arbor, MI 48109
| | - Jeanette P Brown
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Health System, Ann Arbor, MI 48109
| | - Sean W Crudgington
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Health System, Ann Arbor, MI 48109
| | - Sophina H Taitano
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109
| | | | - Peter Mancuso
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109; Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI 48109; and
| | - Jeffrey L Curtis
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109; Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Health System, Ann Arbor, MI 48109; Medical Service, VA Ann Arbor Healthcare System, Ann Arbor, MI 48105
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Sulfhydryl-mediated redox signaling in inflammation: role in neurodegenerative diseases. Arch Toxicol 2015; 89:1439-67. [DOI: 10.1007/s00204-015-1496-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 02/25/2015] [Indexed: 01/05/2023]
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Abstract
The importance of PTEN in cellular function is underscored by the frequency of its deregulation in cancer. PTEN tumor-suppressor activity depends largely on its lipid phosphatase activity, which opposes PI3K/AKT activation. As such, PTEN regulates many cellular processes, including proliferation, survival, energy metabolism, cellular architecture, and motility. More than a decade of research has expanded our knowledge about how PTEN is controlled at the transcriptional level as well as by numerous posttranscriptional modifications that regulate its enzymatic activity, protein stability, and cellular location. Although the role of PTEN in cancers has long been appreciated, it is also emerging as an important factor in other diseases, such as diabetes and autism spectrum disorders. Our understanding of PTEN function and regulation will hopefully translate into improved prognosis and treatment for patients suffering from these ailments.
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Affiliation(s)
- Carolyn A Worby
- Department of Pharmacology, University of California, San Diego, La Jolla, California 92093-0721;
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Abstract
Neutrophils play critical roles in innate immunity and host defense. However, excessive neutrophil accumulation or hyper-responsiveness of neutrophils can be detrimental to the host system. Thus, the response of neutrophils to inflammatory stimuli needs to be tightly controlled. Many cellular processes in neutrophils are mediated by localized formation of an inositol phospholipid, phosphatidylinositol (3,4,5)-trisphosphate (PtdIns(3,4,5)P3), at the plasma membrane. The PtdIns(3,4,5)P3 signaling pathway is negatively regulated by lipid phosphatases and inositol phosphates, which consequently play a critical role in controlling neutrophil function and would be expected to act as ideal therapeutic targets for enhancing or suppressing innate immune responses. Here, we comprehensively review current understanding about the action of lipid phosphatases and inositol phosphates in the control of neutrophil function in infection and inflammation.
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Affiliation(s)
- Hongbo R Luo
- Department of Pathology, Harvard Medical School, Boston, MA, USA Department of Lab Medicine, Children's Hospital Boston, Dana-Farber/Harvard Cancer Center, Boston, MA, USA
| | - Subhanjan Mondal
- Department of Pathology, Harvard Medical School, Boston, MA, USA Department of Lab Medicine, Children's Hospital Boston, Dana-Farber/Harvard Cancer Center, Boston, MA, USA Promega Corporation, Madison, WI, USA
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Cole J, Aberdein J, Jubrail J, Dockrell DH. The role of macrophages in the innate immune response to Streptococcus pneumoniae and Staphylococcus aureus: mechanisms and contrasts. Adv Microb Physiol 2014; 65:125-202. [PMID: 25476766 DOI: 10.1016/bs.ampbs.2014.08.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Macrophages are critical mediators of innate immune responses against bacteria. The Gram-positive bacteria Streptococcus pneumoniae and Staphylococcus aureus express a range of virulence factors, which challenge macrophages' immune competence. We review how macrophages respond to this challenge. Macrophages employ a range of strategies to phagocytose and kill each pathogen. When the macrophages capacity to clear bacteria is overwhelmed macrophages play important roles in orchestrating the inflammatory response through pattern recognition receptor-mediated responses. Macrophages also ensure the inflammatory response is tightly constrained, to avoid tissue damage, and play an important role in downregulating the inflammatory response once initial bacterial replication is controlled.
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Affiliation(s)
- Joby Cole
- Department of Infection and Immunity, University of Sheffield Medical School and Sheffield Teaching Hospitals, Sheffield, United Kingdom
| | - Jody Aberdein
- Department of Infection and Immunity, University of Sheffield Medical School and Sheffield Teaching Hospitals, Sheffield, United Kingdom
| | - Jamil Jubrail
- Department of Infection and Immunity, University of Sheffield Medical School and Sheffield Teaching Hospitals, Sheffield, United Kingdom
| | - David H Dockrell
- Department of Infection and Immunity, University of Sheffield Medical School and Sheffield Teaching Hospitals, Sheffield, United Kingdom.
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Im E, Jung J, Pothoulakis C, Rhee SH. Disruption of Pten speeds onset and increases severity of spontaneous colitis in Il10(-/-) mice. Gastroenterology 2014; 147:667-679.e10. [PMID: 24882466 PMCID: PMC4143453 DOI: 10.1053/j.gastro.2014.05.034] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 04/11/2014] [Accepted: 05/17/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Early-onset ulcerative colitis, which is considered severe colonic inflammation that develops in infants and young children, can be caused by alterations in interleukin (IL)-10 signaling, although other factors are involved in its pathogenesis. We investigated whether loss of phosphatase and tensin homologue (PTEN), which regulates many important cell functions such as cell proliferation, cell survival, and Toll-like receptor (TLR) signaling pathways, contributes to the development of colitis in Il10(-/-) mice. METHODS We generated Il10(-/-) mice (in C57BL/6 and C3H/HeJBir background strains) with disruption of Pten in the intestinal epithelium (Ints(ΔPten/ΔPten);Il10(-/-) mice) and Ints(ΔCont);Il10(-/-) (control) mice. Colon tissues were collected and histological, transmission electron microscopy, and gene expression analysis were performed. Fecal microbiota samples were analyzed by sequencing of 16S ribosomal RNA genes. We disrupted Tlr4 in Ints(ΔPten/ΔPten);Il10(-/-) mice. Lipopolysaccharide signaling via TLR4 was blocked by treating mice with polymyxin B. RESULTS Il10(-/-) mice developed colitis when they were 6 to 7 months old, whereas Ints(ΔPten/ΔPten);Il10(-/-) mice developed severe colitis and colon tumors by the time they were 36 days old. Within 3 months of birth, 80% of Ints(ΔPten/ΔPten);Il10(-/-) mice developed severe colitis and colonic malignancy, whereas none of the Ints(ΔCont);Il10(-/-) mice had these phenotypes. Ints(ΔPten/ΔPten);Il10(-/-) mice had alterations in fecal microbiota compared with controls, such as increased proportions of Bacteroides species, which are gram negative. Disruption of Tlr4 or treating Ints(ΔPten/ΔPten);Il10(-/-) mice with polymyxin B delayed the development of colitis and reduced disease severity. CONCLUSIONS Disruption of Pten in the intestinal epithelium of Il10(-/-) mice speeds the onset and increases the severity of colitis. Fecal microbiota from Ints(ΔPten/ΔPten);Il10(-/-) mice have increased proportions of Bacteroides species. Development of colitis is delayed and reduced by blocking TLR4 signaling. Ints(ΔPten/ΔPten);Il10(-/-) mice may be studied as a model for early-onset ulcerative colitis and used to identify new therapeutic targets.
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Affiliation(s)
- Eunok Im
- College of Pharmacy, Pusan National University, Busan, 609-735, Korea
| | - Jane Jung
- MRL1240, 675 Charles E. Young Drive South, Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Charalabos Pothoulakis
- MRL1240, 675 Charles E. Young Drive South, Division of Digestive Diseases, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Sang Hoon Rhee
- Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California.
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Sahin E, Haubenwallner S, Kuttke M, Kollmann I, Halfmann A, Dohnal AM, Dohnal AB, Chen L, Cheng P, Hoesel B, Einwallner E, Brunner J, Kral JB, Schrottmaier WC, Thell K, Saferding V, Blüml S, Schabbauer G. Macrophage PTEN regulates expression and secretion of arginase I modulating innate and adaptive immune responses. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2014; 193:1717-27. [PMID: 25015834 DOI: 10.4049/jimmunol.1302167] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The activation of innate immune cells triggers numerous intracellular signaling pathways, which require tight control to mount an adequate immune response. The PI3K signaling pathway is intricately involved in innate immunity, and its activation dampens the expression and release of proinflammatory cytokines in myeloid cells. These signaling processes are strictly regulated by the PI3K antagonist, the lipid phosphatase, PTEN, a known tumor suppressor. Importantly, PTEN is responsible for the elevated production of cytokines such as IL-6 in response to TLR agonists, and deletion of PTEN results in diminished inflammatory responses. However, the mechanisms by which PI3K negatively regulates TLR signaling are only partially resolved. We observed that Arginase I expression and secretion were markedly induced by PTEN deletion, suggesting PTEN(-/-) macrophages were alternatively activated. This was mediated by increased expression and activation of the transcription factors C/EBPβ and STAT3. Genetic and pharmacologic experimental approaches in vitro, as well as in vivo autoimmunity models, provide convincing evidence that PI3K/PTEN-regulated extracellular Arginase I acts as a paracrine regulator of inflammation and immunity.
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Affiliation(s)
- Emine Sahin
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Stefan Haubenwallner
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Mario Kuttke
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Isabella Kollmann
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Angela Halfmann
- St. Anna Children's Cancer Research Institute, A-1090 Vienna, Austria
| | | | | | - Li Chen
- Bio Cancer Treatment International Ltd., Hong Kong, China
| | - Paul Cheng
- Bio Cancer Treatment International Ltd., Hong Kong, China
| | - Bastian Hoesel
- Department of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Elisa Einwallner
- Department of Laboratory Medicine, Medical University of Vienna, A-1090 Vienna, Austria; and
| | - Julia Brunner
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Julia B Kral
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Waltraud C Schrottmaier
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Kathrin Thell
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria
| | - Victoria Saferding
- Department of Rheumatology, Internal Medicine III, Medical University of Vienna, A-1090 Vienna, Austria
| | - Stephan Blüml
- Department of Rheumatology, Internal Medicine III, Medical University of Vienna, A-1090 Vienna, Austria
| | - Gernot Schabbauer
- Institute for Physiology, Center for Physiology and Pharmacology, Medical University of Vienna, A-1090 Vienna, Austria;
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48
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Joshi S, Singh AR, Zulcic M, Durden DL. A macrophage-dominant PI3K isoform controls hypoxia-induced HIF1α and HIF2α stability and tumor growth, angiogenesis, and metastasis. Mol Cancer Res 2014; 12:1520-31. [PMID: 25103499 DOI: 10.1158/1541-7786.mcr-13-0682] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
UNLABELLED Tumor growth, progression, and response to the hypoxic tumor microenvironment involve the action of hypoxia-inducible transcription factors, HIF1 and HIF2. HIF is a heterodimeric transcription factor containing an inducible HIFα subunit and a constitutively expressed HIFβ subunit. The signaling pathways operational in macrophages regulating hypoxia-induced HIFα stabilization remain the subject of intense investigation. Here, it was discovered that the PTEN/PI3K/AKT signaling axis controls hypoxia-induced HIF1α (HIF1A) and HIF2α (EPAS1) stability in macrophages. Using genetic mouse models and pan-PI3K as well as isoform-specific inhibitors, inhibition of the PI3K/AKT pathway blocked the accumulation of HIFα protein and its primary transcriptional target VEGF in response to hypoxia. Moreover, blocking the PI3K/AKT signaling axis promoted the hypoxic degradation of HIFα via the 26S proteasome. Mechanistically, a macrophage-dominant PI3K isoform (p110γ) directed tumor growth, angiogenesis, metastasis, and the HIFα/VEGF axis. Moreover, a pan-PI3K inhibitor (SF1126) blocked tumor-induced angiogenesis and inhibited VEGF and other proangiogenic factors secreted by macrophages. These data define a novel molecular mechanism by which PTEN/PI3K/AKT regulates the proteasome-dependent stability of HIFα under hypoxic conditions, a signaling pathway in macrophages that controls tumor-induced angiogenesis and metastasis. IMPLICATIONS This study indicates that PI3K inhibitors are excellent candidates for the treatment of cancers where macrophages promote tumor progression.
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Affiliation(s)
- Shweta Joshi
- UCSD Department of Pediatrics, Moores Cancer Center, University of California, La Jolla, California
| | - Alok R Singh
- UCSD Department of Pediatrics, Moores Cancer Center, University of California, La Jolla, California
| | - Muamera Zulcic
- UCSD Department of Pediatrics, Moores Cancer Center, University of California, La Jolla, California
| | - Donald L Durden
- UCSD Department of Pediatrics, Moores Cancer Center, University of California, La Jolla, California. Division of Pediatric Hematology-Oncology, UCSD Rady Children's Hospital, San Diego, California. SignalRx Pharmaceuticals, San Diego, California.
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49
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Sharif O, Gawish R, Warszawska JM, Martins R, Lakovits K, Hladik A, Doninger B, Brunner J, Korosec A, Schwarzenbacher RE, Berg T, Kralovics R, Colinge J, Mesteri I, Gilfillan S, Salmaggi A, Verschoor A, Colonna M, Knapp S. The triggering receptor expressed on myeloid cells 2 inhibits complement component 1q effector mechanisms and exerts detrimental effects during pneumococcal pneumonia. PLoS Pathog 2014; 10:e1004167. [PMID: 24945405 PMCID: PMC4055749 DOI: 10.1371/journal.ppat.1004167] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 04/07/2014] [Indexed: 11/18/2022] Open
Abstract
Phagocytosis and inflammation within the lungs is crucial for host defense during bacterial pneumonia. Triggering receptor expressed on myeloid cells (TREM)-2 was proposed to negatively regulate TLR-mediated responses and enhance phagocytosis by macrophages, but the role of TREM-2 in respiratory tract infections is unknown. Here, we established the presence of TREM-2 on alveolar macrophages (AM) and explored the function of TREM-2 in the innate immune response to pneumococcal infection in vivo. Unexpectedly, we found Trem-2(-/-) AM to display augmented bacterial phagocytosis in vitro and in vivo compared to WT AM. Mechanistically, we detected that in the absence of TREM-2, pulmonary macrophages selectively produced elevated complement component 1q (C1q) levels. We found that these increased C1q levels depended on peroxisome proliferator-activated receptor-δ (PPAR-δ) activity and were responsible for the enhanced phagocytosis of bacteria. Upon infection with S. pneumoniae, Trem-2(-/-) mice exhibited an augmented bacterial clearance from lungs, decreased bacteremia and improved survival compared to their WT counterparts. This work is the first to disclose a role for TREM-2 in clinically relevant respiratory tract infections and demonstrates a previously unknown link between TREM-2 and opsonin production within the lungs.
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MESH Headings
- Animals
- Apoptosis
- Cell Line, Transformed
- Cells, Cultured
- Complement C1q/genetics
- Complement C1q/metabolism
- Cytokines/metabolism
- Disease Models, Animal
- Female
- Lung/cytology
- Lung/immunology
- Lung/metabolism
- Lung/pathology
- Macrophages, Alveolar/immunology
- Macrophages, Alveolar/metabolism
- Macrophages, Alveolar/pathology
- Male
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Mice, Inbred C57BL
- Mice, Knockout
- Neutrophil Infiltration
- PPAR gamma/metabolism
- Phagocytosis
- Pneumonia, Pneumococcal/immunology
- Pneumonia, Pneumococcal/metabolism
- Pneumonia, Pneumococcal/pathology
- Receptors, Immunologic/genetics
- Receptors, Immunologic/metabolism
- Respiratory Mucosa/cytology
- Respiratory Mucosa/immunology
- Respiratory Mucosa/metabolism
- Respiratory Mucosa/pathology
- Survival Analysis
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Affiliation(s)
- Omar Sharif
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
- * E-mail: (OS); (SK)
| | - Riem Gawish
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Joanna M. Warszawska
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Rui Martins
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Karin Lakovits
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Anastasiya Hladik
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Bianca Doninger
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Julia Brunner
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Ana Korosec
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Roland E. Schwarzenbacher
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Tiina Berg
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Robert Kralovics
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Jacques Colinge
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Ildiko Mesteri
- Department of Pathology, Medical University of Vienna, Vienna, Austria
| | - Susan Gilfillan
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Andrea Salmaggi
- Department of Clinical Neurosciences, Istituto Nazionale Neurologico Carlo Besta, Milano, Italy
| | - Admar Verschoor
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University Munich, Munich, Germany
| | - Marco Colonna
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Sylvia Knapp
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
- * E-mail: (OS); (SK)
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50
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Shenker BJ, Walker LP, Zekavat A, Dlakić M, Boesze-Battaglia K. Blockade of the PI-3K signalling pathway by the Aggregatibacter actinomycetemcomitans cytolethal distending toxin induces macrophages to synthesize and secrete pro-inflammatory cytokines. Cell Microbiol 2014; 16:1391-404. [PMID: 24697951 DOI: 10.1111/cmi.12299] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 03/24/2014] [Accepted: 03/28/2014] [Indexed: 01/08/2023]
Abstract
The Aggregatibactor actinomycetemcomitans cytolethal distending toxin (Cdt) induces G2 arrest and apoptosis in lymphocytes; these toxic effects are due to the active subunit, CdtB, which functions as a phosphatidylinositol-3,4,5-triphosphate (PIP3) phosphatase. We now extend our investigation and demonstrate that Cdt is able to perturb human macrophage function. THP-1- and monocyte-derived macrophages were found not to be susceptible to Cdt-induced apoptosis. Nonetheless, the toxin was capable of binding to macrophages and perturbing PI-3K signalling resulting in decreased PIP3 levels and reduced phosphorylation of Akt and GSK3β; these changes were accompanied by concomitant alterations in kinase activity. Exposure of monocytes and macrophages to Cdt resulted in pro-inflammatory cytokine production including increased expression and release of IL-1β, TNFα and IL-6. Furthermore, treatment of cells with either TLR-2, -3 or -4 agonists in the presence of Cdt resulted in an augmented pro-inflammatory response relative to agonist alone. GSK3β inhibitors blocked the Cdt-induced pro-inflammatory cytokine response suggesting a pivotal role for PI-3K blockade, concomitant decrease in GSK3β phosphorylation and increased kinase activity. Collectively, these studies provide new insight into the virulence potential of Cdt in mediating the pathogenesis of disease caused by Cdt-producing organisms.
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Affiliation(s)
- Bruce J Shenker
- Department of Pathology, University of Pennsylvania School of Dental Medicine, 240 South 40th Street, Philadelphia, PA, 19104-6030, USA
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