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Hull A, Atilano ML, Gergi L, Kinghorn KJ. Lysosomal storage, impaired autophagy and innate immunity in Gaucher and Parkinson's diseases: insights for drug discovery. Philos Trans R Soc Lond B Biol Sci 2024; 379:20220381. [PMID: 38368939 PMCID: PMC10874704 DOI: 10.1098/rstb.2022.0381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 11/08/2023] [Indexed: 02/20/2024] Open
Abstract
Impairment of autophagic-lysosomal pathways is increasingly being implicated in Parkinson's disease (PD). GBA1 mutations cause the lysosomal storage disorder Gaucher disease (GD) and are the commonest known genetic risk factor for PD. GBA1 mutations have been shown to cause autophagic-lysosomal impairment. Defective autophagic degradation of unwanted cellular constituents is associated with several pathologies, including loss of normal protein homeostasis, particularly of α-synuclein, and innate immune dysfunction. The latter is observed both peripherally and centrally in PD and GD. Here, we will discuss the mechanistic links between autophagy and immune dysregulation, and the possible role of these pathologies in communication between the gut and brain in these disorders. Recent work in a fly model of neuronopathic GD (nGD) revealed intestinal autophagic defects leading to gastrointestinal dysfunction and immune activation. Rapamycin treatment partially reversed the autophagic block and reduced immune activity, in association with increased survival and improved locomotor performance. Alterations in the gut microbiome are a critical driver of neuroinflammation, and studies have revealed that eradication of the microbiome in nGD fly and mouse models of PD ameliorate brain inflammation. Following these observations, lysosomal-autophagic pathways, innate immune signalling and microbiome dysbiosis are discussed as potential therapeutic targets in PD and GD. This article is part of a discussion meeting issue 'Understanding the endo-lysosomal network in neurodegeneration'.
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Affiliation(s)
- Alexander Hull
- Department of Genetics, Evolution & Environment, Institute of Healthy Ageing, Darwin Building, Gower Street, London WC1E 6BT, UK
| | - Magda L Atilano
- Department of Genetics, Evolution & Environment, Institute of Healthy Ageing, Darwin Building, Gower Street, London WC1E 6BT, UK
| | - Laith Gergi
- Department of Genetics, Evolution & Environment, Institute of Healthy Ageing, Darwin Building, Gower Street, London WC1E 6BT, UK
| | - Kerri J Kinghorn
- Department of Genetics, Evolution & Environment, Institute of Healthy Ageing, Darwin Building, Gower Street, London WC1E 6BT, UK
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2
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Reyaz E, Puri N, Selvapandiyan A. Global Remodeling of Host Proteome in Response to Leishmania Infection. ACS Infect Dis 2024; 10:5-19. [PMID: 38084821 DOI: 10.1021/acsinfecdis.3c00492] [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] [Indexed: 01/13/2024]
Abstract
The protozoan parasite Leishmania possesses an intrinsic ability to modulate a multitude of pathways in the host, toward aiding its own proliferation. In response, the host reprograms its cellular, immunological, and metabolic machinery to evade the parasite's lethal impact. Besides inducing various antioxidant signaling pathways to counter the elevated stress response proteins like heme oxygenase-1 (HO-1), Leishmania also attempts to delay host cell apoptosis by promoting anti-apoptotic proteins like Bcl-2. The downstream modulation of apoptotic proteins is regulated by effector pathways, including the PI3K/Akt survival pathway, the mitogen-activated protein kinases (MAPKs) signaling pathway, and STAT phosphorylation. In addition, Leishmania assists in its infection in a time-dependent manner by modulating the level of various proteins of autophagic machinery. Immune effector cells, such as mast cells and neutrophils, entrap and kill the pathogen by secreting various granular proteins. In contrast, the host macrophages exert their leishmanicidal effect by secreting various cytokines, such as IL-2, IL-12, etc. An interplay of various signaling pathways occurs in an organized network that is highly specific to both pathogen and host species. This Review analyzes the modulation of expression of proteins, including the cytokines, providing a realistic approach toward understanding the pathophysiology of disease and predicting some prominent markers for disease intervention and vaccine support strategies.
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Affiliation(s)
- Enam Reyaz
- Department of Molecular Medicine, Jamia Hamdard, New Delhi 110062, India
| | - Niti Puri
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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3
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Babalola JA, Lang M, George M, Stracke A, Tam-Amersdorfer C, Itxaso I, Lucija D, Tadic J, Schilcher I, Loeffler T, Flunkert S, Prokesch M, Leitinger G, Lass A, Hutter-Paier B, Panzenboeck U, Hoefler G. Astaxanthin enhances autophagy, amyloid beta clearance and exerts anti-inflammatory effects in in vitro models of Alzheimer's disease-related blood brain barrier dysfunction and inflammation. Brain Res 2023; 1819:148518. [PMID: 37579986 DOI: 10.1016/j.brainres.2023.148518] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/22/2023] [Accepted: 08/02/2023] [Indexed: 08/16/2023]
Abstract
Defective degradation and clearance of amyloid-β as well as inflammation per se are crucial players in the pathology of Alzheimer's disease (AD). A defective transport across the blood-brain barrier is causative for amyloid-β (Aβ) accumulation in the brain, provoking amyloid plaque formation. Using primary porcine brain capillary endothelial cells and murine organotypic hippocampal slice cultures as in vitro models of AD, we investigated the effects of the antioxidant astaxanthin (ASX) on Aβ clearance and neuroinflammation. We report that ASX enhanced the clearance of misfolded proteins in primary porcine brain capillary endothelial cells by inducing autophagy and altered the Aβ processing pathway. We observed a reduction in the expression levels of intracellular and secreted amyloid precursor protein/Aβ accompanied by an increase in ABC transporters ABCA1, ABCG1 as well as low density lipoprotein receptor-related protein 1 mRNA levels. Furthermore, ASX treatment increased autophagic flux as evidenced by increased lipidation of LC3B-II as well as reduced protein expression of phosphorylated S6 ribosomal protein and mTOR. In LPS-stimulated brain slices, ASX exerted anti-inflammatory effects by reducing the secretion of inflammatory cytokines while shifting microglia polarization from M1 to M2 phenotype. Our data suggest ASX as potential therapeutic compound ameliorating AD-related blood brain barrier impairment and inflammation.
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Affiliation(s)
| | - Magdalena Lang
- Otto Loewi Research Center, Division of Immunology, Medical University of Graz, Austria
| | - Meekha George
- Department of Obstetrics and Gynaecology, Medical University of Graz, Austria
| | - Anika Stracke
- Otto Loewi Research Center, Division of Immunology, Medical University of Graz, Austria
| | | | | | | | - Jelena Tadic
- Institute of Molecular Biosciences, University of Graz, Austria
| | | | | | | | | | - Gerd Leitinger
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Austria
| | - Achim Lass
- Institute of Molecular Biosciences, University of Graz, Austria
| | | | - Ute Panzenboeck
- Otto Loewi Research Center, Division of Immunology, Medical University of Graz, Austria
| | - Gerald Hoefler
- Diagnostic and Research Institute of Pathology, Medical University of Graz, Austria.
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Sabo AN, Filaudeau E, Da Silva S, Becker G, Monassier L, Kemmel V. Flavoured and nicotine-containing e-liquids impair homeostatic properties of an alveolar-capillary cell model. Food Chem Toxicol 2023; 174:113650. [PMID: 36758787 DOI: 10.1016/j.fct.2023.113650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 01/26/2023] [Accepted: 02/01/2023] [Indexed: 02/11/2023]
Abstract
Most people consider that electronic cigarettes are safer than tobacco and are marketed as quit-smoking products. The e-liquid, which usually contains propylene glycol (PG) and vegetable glycerin (VG) in different ratios, nicotine and a wide variety of flavours, is heated by a coil and the aerosol droplets are primarily delivered to the alveolar area where nicotine and other molecules cross the alveolar-capillary barrier (ACB). However, e-cigarettes effects on the ACB are not yet established. In our study, a well-characterised in vitro model of the ACB was exposed to PG and VG and to five flavoured e-liquids with and without nicotine. The vehicles, due to their hypertonic properties, modulated the ACB integrity by modifying occludin expression. Below a 10% concentration, the vehicles did not trigger oxidative stress or cell death. Different results were observed between flavoured e-liquids: while red fruits and mint-eucalyptus disrupted ACB integrity, triggered oxidative stress and cell death, blond tobacco had no worse effect compared to the vehicles. However, the addition of nicotine in the latter e-liquid increased oxidative stress and cell death compared to the vehicles. Finally, mint-eucalyptus e-liquid increased some inflammation markers. Our results revealed that e-liquids alter ACB homeostasis, depending on flavour and nicotine presence.
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Affiliation(s)
- Amelia-Naomi Sabo
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France; Laboratoire de Biochimie et Biologie Moléculaire, Hôpitaux Universitaires de Strasbourg, 67200, Strasbourg, France.
| | - Emma Filaudeau
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France.
| | - Sylvia Da Silva
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France.
| | - Guillaume Becker
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France; Hôpitaux Universitaires de Strasbourg, Hôpital de Hautepierre, Pôle Pharmacie-Pharmacologie, 67200, France.
| | - Laurent Monassier
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France.
| | - Véronique Kemmel
- Laboratoire de Pharmacologie et Toxicologie Neurocardiovasculaire, UR 7296, Faculté de Médecine de Maïeutique et des Métiers de la Santé, Centre de Recherche en Biomédecine de Strasbourg (CRBS), 67085, Strasbourg, France; Laboratoire de Biochimie et Biologie Moléculaire, Hôpitaux Universitaires de Strasbourg, 67200, Strasbourg, France.
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5
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Chen Y, Cao B, Zheng W, Xu T. ACKR4a induces autophagy to block NF-κB signaling and apoptosis to facilitate Vibrio harveyi infection. iScience 2023; 26:106105. [PMID: 36843837 PMCID: PMC9947386 DOI: 10.1016/j.isci.2023.106105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 12/03/2022] [Accepted: 01/27/2023] [Indexed: 02/04/2023] Open
Abstract
Autophagy and apoptosis are two recognized mechanisms of resistance to bacterial invasion. However, bacteria have likewise evolved the ability to evade immunity. In this study, we identify ACKR4a, a member of an atypical chemokine receptor family, as a suppressor of the NF-κB pathway, which cooperates with Beclin-1 to induce autophagy to inhibit NF-κB signaling and block apoptosis, facilitating Vibrio harveyi infection. Mechanistically, V. harveyi-induced Ap-1 activates ACKR4a transcription and expression. ACKR4a forms a complex with Beclin-1 and MyD88, respectively, inducing autophagy and transporting MyD88 into the lysosome for degradation to suppress inflammatory cytokine production. Meanwhile, ACKR4a-induced autophagy blocks apoptosis by inhibiting caspase8. This study proves for the first time that V. harveyi uses both autophagy and apoptosis to evade innate immunity, suggesting that V. harveyi has evolved the ability to against fish immunity.
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Affiliation(s)
- Ya Chen
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
| | - Baolan Cao
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
| | - Weiwei Zheng
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
| | - Tianjun Xu
- Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China
- Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
- Corresponding author
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6
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Inflammaging: Implications in Sarcopenia. Int J Mol Sci 2022; 23:ijms232315039. [PMID: 36499366 PMCID: PMC9740553 DOI: 10.3390/ijms232315039] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/25/2022] [Accepted: 11/28/2022] [Indexed: 12/02/2022] Open
Abstract
In a world in which life expectancy is increasing, understanding and promoting healthy aging becomes a contemporary demand. In the elderly, a sterile, chronic and low-grade systemic inflammation known as "inflammaging" is linked with many age-associated diseases. Considering sarcopenia as a loss of strength and mass of skeletal muscle related to aging, correlations between these two terms have been proposed. Better knowledge of the immune system players in skeletal muscle would help to elucidate their implications in sarcopenia. Characterizing the activators of damage sensors and the downstream effectors explains the inference with skeletal muscle performance. Sarcopenia has also been linked to chronic diseases such as diabetes, metabolic syndrome and obesity. Implications of inflammatory signals from these diseases negatively affect skeletal muscle. Autophagic mechanisms are closely related with the inflammasome, as autophagy eliminates stress signaling sent by damage organelles, but also acts with an immunomodulatory function affecting immune cells and cytokine release. The use of melatonin, an antioxidant, ROS scavenger and immune and autophagy modulator, or senotherapeutic compounds targeting senescent cells could represent strategies to counteract inflammation. This review aims to present the many factors regulating skeletal muscle inflammaging and their major implications in order to understand the molecular mechanisms involved in sarcopenia.
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7
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Mu W, Rezek V, Martin H, Carrillo MA, Tomer S, Hamid P, Lizarraga MA, Tibbe TD, Yang OO, Jamieson BD, Kitchen SG, Zhen A. Autophagy inducer rapamycin treatment reduces IFN-I-mediated Inflammation and improves anti-HIV-1 T cell response in vivo. JCI Insight 2022; 7:e159136. [PMID: 36509289 PMCID: PMC9746825 DOI: 10.1172/jci.insight.159136] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 09/27/2022] [Indexed: 11/22/2022] Open
Abstract
A hallmark of HIV-1 infection is chronic inflammation, even in patients treated with antiretroviral therapy (ART). Chronic inflammation drives HIV-1 pathogenesis, leading to loss of CD4+ T cells and exhaustion of antiviral immunity. Therefore, strategies to safely reduce systematic inflammation are needed to halt disease progression and restore defective immune responses. Autophagy is a cellular mechanism for disposal of damaged organelles and elimination of intracellular pathogens. Autophagy is pivotal for energy homeostasis and plays critical roles in regulating immunity. However, how it regulates inflammation and antiviral T cell responses during HIV infection is unclear. Here, we demonstrate that autophagy is directly linked to IFN-I signaling, which is a key driver of immune activation and T cell exhaustion during chronic HIV infection. Impairment of autophagy leads to spontaneous IFN-I signaling, and autophagy induction reduces IFN-I signaling in monocytic cells. Importantly, in HIV-1-infected humanized mice, autophagy inducer rapamycin treatment significantly reduced persistent IFN-I-mediated inflammation and improved antiviral T cell responses. Cotreatment of rapamycin with ART led to significantly reduced viral rebound after ART withdrawal. Taken together, our data suggest that therapeutically targeting autophagy is a promising approach to treat persistent inflammation and improve immune control of HIV replication.
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Affiliation(s)
- Wenli Mu
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Valerie Rezek
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Heather Martin
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Mayra A. Carrillo
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Shallu Tomer
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Philip Hamid
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Miguel A. Lizarraga
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Tristan D. Tibbe
- Statistic Core, Department of Medicine at UCLA, Los Angeles, California, USA
| | - Otto O. Yang
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
- Division of Infectious Disease and
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | | | - Scott G. Kitchen
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Anjie Zhen
- Division of Hematology/Oncology, Department of Medicine and
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
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8
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Fan Y, Dong W, Wang Y, Zhu S, Chai R, Xu Z, Zhang X, Yan Y, Yang L, Bian Y. Glycyrrhetinic acid regulates impaired macrophage autophagic flux in the treatment of non-alcoholic fatty liver disease. Front Immunol 2022; 13:959495. [PMID: 35967372 PMCID: PMC9365971 DOI: 10.3389/fimmu.2022.959495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 07/01/2022] [Indexed: 11/13/2022] Open
Abstract
Macrophages are involved in hepatocyte steatosis and necroinflammation and play an important role in the pathogenesis of non-alcoholic fatty liver disease (NAFLD). Impaired autophagy function (decreased autophagy or blocked autophagic flow) leads to cell damage and death and promotes NAFLD progression. The experimental and clinical research of glycyrrhetinic acid (GA) in the treatment of NAFLD has gradually attracted attention with clear pharmacological activities such as immune regulation, antiviral, antitumor, antioxidant, liver protection, and anti-inflammatory. However, the effects of GA on the STAT3-HIF-1α pathway and autophagy in macrophages are still unclear, and its mechanism of action in the treatment of NAFLD remains to be further elucidated. We constructed a NAFLD mouse model through a high-fat and high-sugar diet to investigate the therapeutic effects of GA. The results showed that GA reduced weight, improved the pathological changes and hepatic lipid deposition of liver, and abnormally elevated the levels of serum biochemical (AST, ALT, TG, T-CHO, LDL-C, and HDL-C) and inflammatory indexes (IL-1β, IL-4, IL-6, MCP-1, and TNF-α) in NAFLD mice. Further examination revealed that GA ameliorates excessive hepatic macrophage infiltration and hepatocyte apoptosis. The results of the cell experiments further elaborated that GA modulated the PA-induced macrophage STAT3-HIF-1α pathway and ameliorated impaired autophagic flux (blockade of autophagosome–lysosome fusion) and overactivation of inflammation. Excessive hepatocyte apoptosis caused by the uncontrolled release of inflammatory cytokines was also suppressed by GA.ConclusionThis study demonstrated that GA could regulate the STAT3-HIF-1α pathway of macrophages, ameliorate the impaired autophagy flux, and reduce the excessive production of inflammatory cytokines to improve the excessive apoptosis of liver cells, thus playing a therapeutic role on NAFLD.
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Affiliation(s)
- Yadong Fan
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Wenjin Dong
- Department of Science and Education, Tianjin Union Medical Center, Tianjin, China
| | - Ying Wang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Shan Zhu
- State Key Laboratory of Component Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Rundong Chai
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Zhe Xu
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Xiaoyu Zhang
- The Reproductive Center, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Yiqi Yan
- State Key Laboratory of Component Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Long Yang
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- *Correspondence: Long Yang, ; Yuhong bian,
| | - Yuhong Bian
- School of Integrative Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, China
- *Correspondence: Long Yang, ; Yuhong bian,
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9
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Sun W. Host-Genome Similarity Characterizes the Adaption of SARS-CoV-2 to Humans. Biomolecules 2022; 12:biom12070972. [PMID: 35883528 PMCID: PMC9312508 DOI: 10.3390/biom12070972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 06/30/2022] [Accepted: 07/07/2022] [Indexed: 02/04/2023] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has a high mutation rate and many variants have emerged in the last 2 years, including Alpha, Beta, Delta, Gamma and Omicron. Studies showed that the host-genome similarity (HGS) of SARS-CoV-2 is higher than SARS-CoV and the HGS of open reading frame (ORF) in coronavirus genome is closely related to suppression of innate immunity. Many works have shown that ORF 6 and ORF 8 of SARS-CoV-2 play an important role in suppressing IFN-β signaling pathway in vivo. However, the relation between HGS and the adaption of SARS-CoV-2 variants is still not clear. This work investigates HGS of SARS-CoV-2 variants based on a dataset containing more than 40,000 viral genomes. The relation between HGS of viral ORFs and the suppression of antivirus response is studied. The results show that ORF 7b, ORF 6 and ORF 8 are the top 3 genes with the highest HGS. In the past 2 years, the HGS values of ORF 8 and ORF 7B of SARS-CoV-2 have increased greatly. A remarkable correlation is discovered between HGS and inhibition of antivirus response of immune system, which suggests that the similarity between coronavirus and host gnome may be an indicator of the suppression of innate immunity. Among the five variants (Alpha, Beta, Delta, Gamma and Omicron), Delta has the highest HGS and Omicron has the lowest HGS. This finding implies that the high HGS in Delta variant may indicate further suppression of host innate immunity. However, the relatively low HGS of Omicron is still a puzzle. By comparing the mutations in genomes of Alpha, Delta and Omicron variants, a commonly shared mutation ACT > ATT is identified in high-HGS strain populations. The high HGS mutations among the three variants are quite different. This finding strongly suggests that mutations in high HGS strains are different in different variants. Only a few common mutations survive, which may play important role in improving the adaptability of SARS-CoV-2. However, the mechanism for how the mutations help SARS-CoV-2 escape immunity is still unclear. HGS analysis is a new method to study virus−host interaction and may provide a way to understand the rapid mutation and adaption of SARS-CoV-2.
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Affiliation(s)
- Weitao Sun
- School of Aerospace Engineering, Tsinghua University, Beijing 100084, China;
- Zhou Pei-Yuan Center for Applied Mathematics, Tsinghua University, Beijing 100084, China
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10
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Cheng B, Wang Q, Wei Z, He Y, Li R, Liu G, Zeng S, Meng Z. MHBSt 167 induced autophagy promote cell proliferation and EMT by activating the immune response in L02 cells. Virol J 2022; 19:110. [PMID: 35761331 PMCID: PMC9235077 DOI: 10.1186/s12985-022-01840-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 06/03/2022] [Indexed: 11/13/2022] Open
Abstract
Background Hepatitis B virus can induce hepatocellular carcinoma (HCC) by inducing a host immune response against infected hepatocytes. C-terminally truncated middle surface protein (MHBSt) has been reported to contribute to HCC through transcriptional activation in epidemiology studies, while the underlying mechanism of MHBSt-induced HCC is unknown. Methods In this study, a premature stop at codon 167 in MHBS (MHBSt167) was investigated into eukaryotic expression plasmid pcDNA3.1(-). MHBSt167 expressed plasmid was transfected into the L02 cell line, cell proliferation was analyzed by CCK-8 and high-content screening assays, the cell cycle was analyzed by flow cytometry, and epithelial-to-mesenchymal transition and autophagy were analyzed by immunoblotting and immunofluorescence. NF-κB activation and the MHBSt167-induced immune response were analyzed by immunoblotting and immunofluorescence. IFN-α, IFN-β and IL-1α expression were analyzed by qPCR. Autophagy inhibitors were used to analyze the relationship between the immune response and autophagy. Results The results showed that MHBSt167 promoted L02 cell proliferation, accelerated cell cycle progression from the S to G2 phase and promoted epithelial-to-mesenchymal transition through ER-stress, leading to autophagy and NF-κB activation and increased immune-related factor expression. The MHBSt167-induced acceleration of cell proliferation and the cell cycle was abolished by autophagy or NF-κB inhibitors. Conclusion In summary, MHBSt167 could promote cell proliferation, accelerate cell cycle progression, induce EMT and activate autophagy through ER-stress to induce the host immune response, supporting a potential role of MHBSt167 in contributing to carcinogenesis. Supplementary Information The online version contains supplementary material available at 10.1186/s12985-022-01840-z.
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Affiliation(s)
- Bin Cheng
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China.,Hubei Key Laboratory of Embryonic Stem Cell Research, Shiyan, 442000, Hubei, China
| | - Qiong Wang
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China.,Department of Infectious Diseases, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China
| | - Zhiqiang Wei
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China.,Hubei Key Laboratory of Embryonic Stem Cell Research, Shiyan, 442000, Hubei, China
| | - Yulin He
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China.,Hubei Key Laboratory of Embryonic Stem Cell Research, Shiyan, 442000, Hubei, China
| | - Ruiming Li
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China.,Hubei Key Laboratory of Embryonic Stem Cell Research, Shiyan, 442000, Hubei, China
| | - Guohua Liu
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China.,Hubei Key Laboratory of Embryonic Stem Cell Research, Shiyan, 442000, Hubei, China
| | - Shaobo Zeng
- Department of Hepatobiliary Pancreatic Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China
| | - Zhongji Meng
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China. .,Department of Infectious Diseases, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, China. .,Hubei Key Laboratory of Embryonic Stem Cell Research, Shiyan, 442000, Hubei, China.
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11
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Wu YQ, Xiong J, He ZL, Yuan Y, Wang BN, Xu JY, Wu M, Zhang SS, Cai SF, Zhao JX, Xu K, Zhang HY, Xiao J. Metformin promotes microglial cells to facilitate myelin debris clearance and accelerate nerve repairment after spinal cord injury. Acta Pharmacol Sin 2022; 43:1360-1371. [PMID: 34480113 PMCID: PMC9160053 DOI: 10.1038/s41401-021-00759-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 08/08/2021] [Indexed: 02/07/2023] Open
Abstract
Spinal cord injury (SCI) is one kind of severe trauma for central nervous system. Myelin debris clearance and axon regeneration are essential for nerve regeneration after SCI. Metformin, a glucose-lowering drug, has been demonstrated to promote the locomotor functional recovery after SCI. In this study, we investigated the role and molecular mechanism of metformin on myelin preservation in a rat SCI model. SCI was induced in rats by compression at T9 level using a vascular clip. We showed that administration of metformin (50 mg·kg-1·d-1, ip) for 28 days significantly improved locomotor function in SCI rats. Metformin also ameliorated SCI-induced neuronal apoptosis and promoted axon regeneration in the spinal cord. Using co-immunofluorescence of IBa-1 and MBP, and luxol fasting blue (LFB) staining, we demonstrated that metformin promoted the transformation of M1 to M2 phenotype polarization of microglial cells, then greatly facilitated myelin debris clearance and protected the myelin in SCI rats. Furthermore, metformin ameliorated SCI-induced blockade of autophagic flux in the spinal cord, and enhanced the fusion of autophagosome and lysosome by inhibiting the AMPK-mTOR signaling pathway. Moreover, metformin significantly attenuated inflammatory responses in the spinal cord. In LPS-treated BV2 cells, pretreatment with metformin (2 mM) significantly enhanced autophagy level, suppressed inflammation and cell apoptosis. The protective effects were blocked in the presence of an autophagy inhibitor 3-methyladenine (3-MA, 5 mM), suggesting that the effect of metformin on autophagy in microglial cells is essential for the myelin preservation during nerve recovery. This study reveals a novel therapeutic effect of metformin in SCI recovery by regulating the activation of microglial cells and enhancing its autophagy level.
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Affiliation(s)
- Yan-Qing Wu
- The Institute of Life Sciences, Engineering Laboratory of Zhejiang Province for Pharmaceutical Development of Growth Factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Wenzhou, 325035, China
| | - Jun Xiong
- Molecular Pharmacology Research Center, School of Pharmaceutical Science Wenzhou Medical University, Wenzhou, 325035, China
| | - Zi-Li He
- Molecular Pharmacology Research Center, School of Pharmaceutical Science Wenzhou Medical University, Wenzhou, 325035, China
| | - Yuan Yuan
- Department of Pharmacy, Hangzhou Red Cross Hospital, Zhejiang Province Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, 310003, China
| | - Bei-Ni Wang
- Molecular Pharmacology Research Center, School of Pharmaceutical Science Wenzhou Medical University, Wenzhou, 325035, China
| | - Jing-Yu Xu
- The Institute of Life Sciences, Engineering Laboratory of Zhejiang Province for Pharmaceutical Development of Growth Factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Wenzhou, 325035, China
| | - Man Wu
- Molecular Pharmacology Research Center, School of Pharmaceutical Science Wenzhou Medical University, Wenzhou, 325035, China
| | - Su-Su Zhang
- Molecular Pharmacology Research Center, School of Pharmaceutical Science Wenzhou Medical University, Wenzhou, 325035, China
| | - Shu-Fang Cai
- The Institute of Life Sciences, Engineering Laboratory of Zhejiang Province for Pharmaceutical Development of Growth Factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Wenzhou, 325035, China
| | - Jia-Xin Zhao
- Molecular Pharmacology Research Center, School of Pharmaceutical Science Wenzhou Medical University, Wenzhou, 325035, China
| | - Ke Xu
- The Institute of Life Sciences, Engineering Laboratory of Zhejiang Province for Pharmaceutical Development of Growth Factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Wenzhou, 325035, China
| | - Hong-Yu Zhang
- Molecular Pharmacology Research Center, School of Pharmaceutical Science Wenzhou Medical University, Wenzhou, 325035, China.
| | - Jian Xiao
- Molecular Pharmacology Research Center, School of Pharmaceutical Science Wenzhou Medical University, Wenzhou, 325035, China.
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12
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Wang YT, Liu TY, Shen CH, Lin SY, Hung CC, Hsu LC, Chen GC. K48/K63-linked polyubiquitination of ATG9A by TRAF6 E3 ligase regulates oxidative stress-induced autophagy. Cell Rep 2022; 38:110354. [PMID: 35196483 DOI: 10.1016/j.celrep.2022.110354] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 11/23/2021] [Accepted: 01/19/2022] [Indexed: 12/31/2022] Open
Abstract
Excessive generation and accumulation of highly reactive oxidizing molecules causes oxidative stress and oxidative damage to cellular components. Accumulating evidence indicates that autophagy diminishes oxidative damage in cells and maintains redox homeostasis by degrading and recycling intracellular damaged components. Here, we show that TRAF6 E3 ubiquitin ligase and A20 deubiquitinase coordinate to regulate ATG9A ubiquitination and autophagy activation in cells responding to oxidative stress. The ROS-dependent TRAF6-mediated non-proteolytic, K48/63-linked ubiquitination of ATG9A enhances its association with Beclin 1 and the assembly of VPS34-UVRAG complex, thereby stimulating autophagy. Notably, expression of the ATG9A ubiquitination mutants impairs ROS-induced VPS34 activation and autophagy. We further find that lipopolysaccharide (LPS)-induced ROS production also stimulates TRAF6-mediated ATG9A ubiquitination. Ablation of ATG9A causes aberrant TLR4 endosomal trafficking and decreases IRF-3 phosphorylation in LPS-stimulated macrophages. Our findings provide important insights into how K48/K63-linked ubiquitination of ATG9A contributes to the regulation of oxidative stress-induced autophagy.
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Affiliation(s)
- Yi-Ting Wang
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road, Section 2, Taipei 115, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 106, Taiwan
| | - Ting-Yu Liu
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Chia-Hsing Shen
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Shu-Yu Lin
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road, Section 2, Taipei 115, Taiwan
| | - Chin-Chun Hung
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road, Section 2, Taipei 115, Taiwan
| | - Li-Chung Hsu
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan; Center of Precision Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Guang-Chao Chen
- Institute of Biological Chemistry, Academia Sinica, 128 Academia Road, Section 2, Taipei 115, Taiwan; Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei 106, Taiwan.
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13
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Kritschil R, Scott M, Sowa G, Vo N. Role of autophagy in intervertebral disc degeneration. J Cell Physiol 2022; 237:1266-1284. [PMID: 34787318 PMCID: PMC8866220 DOI: 10.1002/jcp.30631] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 10/13/2021] [Accepted: 11/01/2021] [Indexed: 02/03/2023]
Abstract
Intervertebral disc degeneration (IDD) is a leading contributor to low back pain. The intervertebral disc (IVD) is composed of three tissue types: the central gelatinous nucleus pulposus (NP) tissue, the surrounding annulus fibrosus (AF) tissue, and the inferior and superior cartilage endplates. The IVD microenvironment is hypoxic, acidic, hyperosmotic, and low in nutrients because it is mostly avascular. The cellular processes that underlie IDD initiation and progression are still poorly understood. Specifically, a lack of understanding regarding NP cell metabolism and physiology hinders the development of effective therapeutics to treat IDD patients. Autophagy is a vital intracellular degradation process that removes damaged organelles, misfolded proteins, and intracellular pathogens and recycles the degraded components for cellular energy and function. NP cells have adapted to survive within their harsh tissue microenvironment using processes that are largely unknown, and we postulate autophagy is one of these undiscovered mechanisms. In this review, we describe unique features of the IVD tissue, review how physiological stressors impact autophagy in NP cells in vitro, survey the current understanding of autophagy regulation in the IVD, and assess the relationship between autophagy and IDD. Published studies confirm autophagy markers are present in IVD tissue, and IVD cells can regulate autophagy in response to cellular stressors in vitro. However, data are still lacking to determine the exact mechanisms regulating autophagy in IVD cells. More in-depth research is needed to establish whether autophagy is necessary to maintain IVD cell health and validate autophagy as a relevant therapeutic target for treating IDD.
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Affiliation(s)
- Rebecca Kritschil
- Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA
| | - Melanie Scott
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA,Pittsburgh Trauma Research Center, Pittsburgh, PA
| | - Gwendolyn Sowa
- Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA,Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA
| | - Nam Vo
- Department of Orthopedic Surgery, University of Pittsburgh, Pittsburgh, PA
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14
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Neuroprotective effect of aldose reductase knockout in a mouse model of spinal cord injury involves NF-κB pathway. Exp Brain Res 2022; 240:853-859. [DOI: 10.1007/s00221-021-06223-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 09/13/2021] [Indexed: 11/27/2022]
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15
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Lin Y, Huang T, Shen W, Pang Q, Xie Q, Chen X, Tu F. TRPV1 Suppressed NLRP3 Through Regulating Autophagy in Microglia After Ischemia-Reperfusion Injury. J Mol Neurosci 2022; 72:792-801. [PMID: 35041191 DOI: 10.1007/s12031-021-01935-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 10/21/2021] [Indexed: 11/24/2022]
Abstract
The microglia-mediated inflammatory response is one of the main causes of brain tissue damage after stroke. In recent years, it has been reported that autophagy in microglia played an important role in inflammatory response after stroke. Transient receptor potential vanilloid 1 (TRPV1) has been shown to regulate autophagy and inflammatory in microglia; however, the detailed mechanisms remain unclear. This study aimed to investigate whether autophagy regulates inflammatory is associated with TRPV1. Model of oxygen and glucose deprivation/reoxygenation (OGD/R) was established in vitro to induce cerebral ischemia-reperfusion injury (I/R). siRNA of Atg5, inhibitors, and agonists of both autophagy and TRPV1 were involved in our study. Autophagy was assayed by immunofluorescence staining LC-3 and autophagosome was observed using transmission electron microscopy (TEM). Autophagy/inflammation-related markers as Atg5, LC-3II/LC-3I, Beclin-1, NLRP3, IL-1β, and Caspase-1 were also measured in the present study. Results indicated that I/R injury-induced inflammatory injury may be impeded by inhibition of autophagy, and TRPV1 could suppress OGD/R-induced autophagy of microglia. However, the effect of TRPV1's inhibitor on inflammatory response was attenuated when the autophagy was blocked. These findings suggested that TRPV1 exhibits an anti-inflammatory effect on OGD/R-induced microglia, which was at least correlated with the anti-autophagy action of TRPV1 partially.
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Affiliation(s)
- Yao Lin
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, No. 109, Xueyuan West Road, Wenzhou, Zhejiang, China
| | - Tingting Huang
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, No. 109, Xueyuan West Road, Wenzhou, Zhejiang, China
| | - Weimin Shen
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, No. 109, Xueyuan West Road, Wenzhou, Zhejiang, China
| | - Qiongyi Pang
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, No. 109, Xueyuan West Road, Wenzhou, Zhejiang, China
| | - Qingfeng Xie
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, No. 109, Xueyuan West Road, Wenzhou, Zhejiang, China
| | - Xiang Chen
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, No. 109, Xueyuan West Road, Wenzhou, Zhejiang, China.
| | - Fengxia Tu
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, No. 109, Xueyuan West Road, Wenzhou, Zhejiang, China.
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16
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Tomer S, Mu W, Suryawanshi G, Ng H, Wang L, Wennerberg W, Rezek V, Martin H, Chen I, Kitchen S, Zhen A. Cannabidiol modulates expression of type I IFN response genes and HIV infection in macrophages. Front Immunol 2022; 13:926696. [PMID: 36248834 PMCID: PMC9560767 DOI: 10.3389/fimmu.2022.926696] [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: 04/22/2022] [Accepted: 09/15/2022] [Indexed: 01/27/2023] Open
Abstract
Cannabis (Cannabis sativa) is a widely used drug in the United States and the frequency of cannabis use is particularly high among people living with HIV (PLWH). One key component of cannabis, the non-psychotropic (-)-cannabidiol (CBD) exerts a wide variety of biological actions, including anticonvulsive, analgesic, and anti-inflammatory effects. However, the exact mechanism of action through which CBD affects the immune cell signaling remains poorly understood. Here we report that CBD modulates type I interferon responses in human macrophages. Transcriptomics analysis shows that CBD treatment significantly attenuates cGAS-STING-mediated activation of type I Interferon response genes (ISGs) in monocytic THP-1 cells. We further showed that CBD treatment effectively attenuates 2'3-cGAMP stimulation of ISGs in both THP-1 cells and primary human macrophages. Interestingly, CBD significantly upregulates expression of autophagy receptor p62/SQSTM1. p62 is critical for autophagy-mediated degradation of stimulated STING. We observed that CBD treated THP-1 cells have elevated autophagy activity. Upon 2'3'-cGAMP stimulation, CBD treated cells have rapid downregulation of phosphorylated-STING, leading to attenuated expression of ISGs. The CBD attenuation of ISGs is reduced in autophagy deficient THP-1 cells, suggesting that the effects of CBD on ISGs is partially mediated by autophagy induction. Lastly, CBD decreases ISGs expression upon HIV infection in THP-1 cells and human primary macrophages, leading to increased HIV RNA expression 24 hours after infection. However, long term culture with CBD in infected primary macrophages reduced HIV viral spread, suggesting potential dichotomous roles of CBD in HIV replication. Our study highlights the immune modulatory effects of CBD and the needs for additional studies on its effect on viral infection and inflammation.
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Affiliation(s)
- Shallu Tomer
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Wenli Mu
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Gajendra Suryawanshi
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Hwee Ng
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Li Wang
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Wally Wennerberg
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Valerie Rezek
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Heather Martin
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Irvin Chen
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Scott Kitchen
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
| | - Anjie Zhen
- Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- UCLA AIDS Institute and the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, David Geffen School of Medicine at University of California, Los Angeles (UCLA), Los Angeles, CA, United States
- *Correspondence: Anjie Zhen,
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Mild hyperthermia induced by gold nanorods acts as a dual-edge blade in the fate of SH-SY5Y cells via autophagy. Sci Rep 2021; 11:23984. [PMID: 34907215 PMCID: PMC8671444 DOI: 10.1038/s41598-021-02697-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 11/22/2021] [Indexed: 02/07/2023] Open
Abstract
Unraveling unwanted side effects of nanotechnology-based therapies like photothermal therapy (PTT) is vital in translational nanomedicine. Herein, we monitored the relationship between autophagic response at the transcriptional level by using a PCR array and tumor formation ability by colony formation assay in the human neuroblastoma cell line, SH-SY5Y, 48 h after being exposed to two different mild hyperthermia (43 and 48 °C) induced by PTT. In this regard, the promotion of apoptosis and autophagy were evaluated using immunofluorescence imaging and flow cytometry analyses. Protein levels of Ki-67, P62, and LC3 were measured using ELISA. Our results showed that of 86 genes associated with autophagy, the expression of 54 genes was changed in response to PTT. Also, we showed that chaperone-mediated autophagy (CMA) and macroautophagy are stimulated in PTT. Importantly, the results of this study also showed significant changes in genes related to the crosstalk between autophagy, dormancy, and metastatic activity of treated cells. Our findings illustrated that PTT enhances the aggressiveness of cancer cells at 43 °C, in contrast to 48 °C by the regulation of autophagy-dependent manner.
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18
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Pi XJ, Zhao QQ, Wang JX, Zhang XL, Yuan D, Hu SS, He YM, Zhang CC, Zhou ZY, Wang T. Saponins from Panax japonicus attenuate cognitive impairment in ageing rats through regulating microglial polarisation and autophagy. PHARMACEUTICAL BIOLOGY 2021; 59:1117-1125. [PMID: 34403300 PMCID: PMC8381902 DOI: 10.1080/13880209.2021.1961824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 07/20/2021] [Accepted: 07/25/2021] [Indexed: 06/13/2023]
Abstract
CONTEXT Panax japonicus is the dried rhizome of Panax japonicus C.A. Mey. (Araliaceae). Saponins from Panax japonicus (SPJ) exhibit anti-inflammatory and antioxidative effects. OBJECTIVE To explore the neuroprotective effect of SPJ on natural ageing of rat. MATERIALS AND METHODS Sprague-Dawley (SD) rats 18-month-old were divided into ageing control, ageing treated with SPJ 10 or 30 mg/kg (n = 8). Five-month-old rats were taken as the adult control (n = 8). Rats were fed regular feed or feed containing SPJ for 4 months. Cognitive level was evaluated by Morris water maze (MWM) test. The mechanisms of SPJ's neuroprotection were evaluated by transmission electron microscope, western blot analysis, and immunofluorescence in vivo and in vitro. RESULTS SPJ attenuated ageing-induced cognitive impairment as indicated by elevated number of times crossing the target platform (from 1.63 to 3.5) and longer time spent in the target platform quadrant (from 1.33 to 1.98). Meanwhile, SPJ improved the morphology of microglia and synapse, and activated M2 microglia polarisation including increased hippocampus levels of CD206 (from 0.98 to 1.47) and YM-1 (from 0.67 to 1.1), and enhanced autophagy-related proteins LC3B (from 0.48 to 0.82), Beclin1 (from 0.32 to 0.51), Atg5 (from 0.22 to 0.89) whereas decreased p62 level (from 0.71 to 0.45) of ageing rats. In vitro study also showed that SPJ regulated the microglial polarisation and autophagy. DISCUSSION AND CONCLUSIONS SPJ improved cognitive deficits of ageing rats through attenuating microglial inflammation and enhancing microglial autophagy, which could be used to treat neurodegenerative disorders.
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Affiliation(s)
- Xue-Jiao Pi
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
- Department of Pharmacy, College of Medicine, Wuhan University of Science and Technology, Wuhan, China
| | - Qing-Qing Zhao
- College of Medical Science, Three Gorges University, Yichang, China
| | - Jin-Xin Wang
- College of Medical Science, Three Gorges University, Yichang, China
| | - Xu-Lan Zhang
- College of Medical Science, Three Gorges University, Yichang, China
| | - Ding Yuan
- College of Medical Science, Three Gorges University, Yichang, China
| | - Shan-Shan Hu
- College of Medical Science, Three Gorges University, Yichang, China
| | - Yu-Min He
- College of Medical Science, Three Gorges University, Yichang, China
| | | | - Zhi-Yong Zhou
- College of Medical Science, Three Gorges University, Yichang, China
| | - Ting Wang
- Academy of Nutrition and Health, Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China
- Department of Pharmacy, College of Medicine, Wuhan University of Science and Technology, Wuhan, China
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19
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SARS-CoV-2 spike promotes inflammation and apoptosis through autophagy by ROS-suppressed PI3K/AKT/mTOR signaling. Biochim Biophys Acta Mol Basis Dis 2021; 1867:166260. [PMID: 34461258 PMCID: PMC8390448 DOI: 10.1016/j.bbadis.2021.166260] [Citation(s) in RCA: 94] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/17/2021] [Accepted: 08/23/2021] [Indexed: 12/13/2022]
Abstract
Background Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection-induced inflammatory responses are largely responsible for the death of novel coronavirus disease 2019 (COVID-19) patients. However, the mechanism by which SARS-CoV-2 triggers inflammatory responses remains unclear. Here, we aimed to explore the regulatory role of SARS-CoV-2 spike protein in infected cells and attempted to elucidate the molecular mechanism of SARS-CoV-2-induced inflammation. Methods SARS-CoV-2 spike pseudovirions (SCV-2-S) were generated using the spike-expressing virus packaging system. Western blot, mCherry-GFP-LC3 labeling, immunofluorescence, and RNA-seq were performed to examine the regulatory mechanism of SCV-2-S in autophagic response. The effects of SCV-2-S on apoptosis were evaluated by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL), Western blot, and flow cytometry analysis. Enzyme-linked immunosorbent assay (ELISA) was carried out to examine the mechanism of SCV-2-S in inflammatory responses. Results Angiotensin-converting enzyme 2 (ACE2)-mediated SCV-2-S infection induced autophagy and apoptosis in human bronchial epithelial and microvascular endothelial cells. Mechanistically, SCV-2-S inhibited the PI3K/AKT/mTOR pathway by upregulating intracellular reactive oxygen species (ROS) levels, thus promoting the autophagic response. Ultimately, SCV-2-S-induced autophagy triggered inflammatory responses and apoptosis in infected cells. These findings not only improve our understanding of the mechanism underlying SARS-CoV-2 infection-induced pathogenic inflammation but also have important implications for developing anti-inflammatory therapies, such as ROS and autophagy inhibitors, for COVID-19 patients.
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20
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A Decade of Mighty Lipophagy: What We Know and What Facts We Need to Know? OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5539161. [PMID: 34777688 PMCID: PMC8589519 DOI: 10.1155/2021/5539161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 09/30/2021] [Accepted: 10/15/2021] [Indexed: 12/24/2022]
Abstract
Lipids are integral cellular components that act as substrates for energy provision, signaling molecules, and essential constituents of biological membranes along with a variety of other biological functions. Despite their significance, lipid accumulation may result in lipotoxicity, impair autophagy, and lysosomal function that may lead to certain diseases and metabolic syndromes like obesity and even cell death. Therefore, these lipids are continuously recycled and redistributed by the process of selective autophagy specifically termed as lipophagy. This selective form of autophagy employs lysosomes for the maintenance of cellular lipid homeostasis. In this review, we have reviewed the current literature about how lipid droplets (LDs) are recruited towards lysosomes, cross-talk between a variety of autophagy receptors present on LD surface and lysosomes, and lipid hydrolysis by lysosomal enzymes. In addition to it, we have tried to answer most of the possible questions related to lipophagy regulation at different levels. Moreover, in the last part of this review, we have discussed some of the pathological states due to the accumulation of these LDs and their possible treatments under the light of currently available findings.
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21
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Ma L, Li W, Zhang Y, Qi L, Zhao Q, Li N, Lu Y, Zhang L, Zhou F, Wu Y, He Y, Yu H, He Y, Wei B, Wang H. FLT4/VEGFR3 activates AMPK to coordinate glycometabolic reprogramming with autophagy and inflammasome activation for bacterial elimination. Autophagy 2021; 18:1385-1400. [PMID: 34632918 DOI: 10.1080/15548627.2021.1985338] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Macrophages rapidly undergo glycolytic reprogramming in response to macroautophagy/autophagy, inflammasome activation and pyroptosis for the clearance of bacteria. Identification the key molecules involved in these three events will provide critical potential therapeutic applications. Upon S. typhimurium infection, FLT4/VEGFR3 and its ligand VEGFC were inducibly expressed in macrophages, and FLT4 signaling inhibited CASP1 (caspase 1)-dependent inflammasome activation and pyroptosis but enhanced MAP1LC3/LC3 activation for elimination of the bacteria. Consistently, FLT4 mutants lacking the extracellular ligand-binding domain increased production of the proinflammatory metabolites such as succinate and lactate, and reduced antimicrobial metabolites including citrate and NAD(P)H in macrophages and liver upon infection. Mechanistically, FLT4 recruited AMP-activated protein kinase (AMPK) and phosphorylated Y247 and Y441/442 in the PRKAA/alpha subunit for AMPK activation. The AMPK agonist AICAR could rescue glycolytic reprogramming and inflammasome activation in macrophages expressing the mutant FLT4, which has potential translational application in patients carrying Flt4 mutations to prevent recurrent infections. Collectively, we have elucidated that the FLT4-AMPK module in macrophages coordinates glycolytic reprogramming, autophagy, inflammasome activation and pyroptosis to eliminate invading bacteria.
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Affiliation(s)
- Li Ma
- State Key Laboratory of Cell Biology, Cas Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Weiyun Li
- State Key Laboratory of Cell Biology, Cas Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,School of Life Sciences, Xiamen University, Xiamen, Fujian Province, China
| | - Yanbo Zhang
- State Key Laboratory of Cell Biology, Cas Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Linlin Qi
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Qi Zhao
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Na Li
- State Key Laboratory of Cell Biology, Cas Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yao Lu
- State Key Laboratory of Cell Biology, Cas Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Luqing Zhang
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Cam-Su Genomic Resources Center, Soochow University, Suzhou, China
| | - Fei Zhou
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Cam-Su Genomic Resources Center, Soochow University, Suzhou, China
| | - Yichun Wu
- State Key Laboratory of Molecular Biology, National Center for Protein Science Shanghai, Shanghai Science Research Center, Shanghai Key Laboratory of Molecular Andrology, Cas Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Yongning He
- State Key Laboratory of Molecular Biology, National Center for Protein Science Shanghai, Shanghai Science Research Center, Shanghai Key Laboratory of Molecular Andrology, Cas Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China
| | - Hongxiu Yu
- Institutes of Biomedical Science, Fudan University, Shanghai, China
| | - Yulong He
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Cam-Su Genomic Resources Center, Soochow University, Suzhou, China
| | - Bin Wei
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,School of Life Sciences, Shanghai University, Shanghai, China.,School of Medicine, Cancer Center, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Hongyan Wang
- State Key Laboratory of Cell Biology, Cas Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China.,Bio-Research Innovation Center Suzhou, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Suzhou, Jiangsu, China
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22
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Natural Products in Therapeutic Management of Multineurodegenerative Disorders by Targeting Autophagy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6347792. [PMID: 34557265 PMCID: PMC8455192 DOI: 10.1155/2021/6347792] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/09/2021] [Accepted: 08/18/2021] [Indexed: 12/16/2022]
Abstract
Autophagy is an essential cellular process that involves the transport of cytoplasmic content in double-membraned vesicles to lysosomes for degradation. Neurons do not undergo cytokinesis, and thus, the cell division process cannot reduce levels of unnecessary proteins. The primary cause of neurodegenerative disorders (NDs) is the abnormal deposition of proteins inside neuronal cells, and this could be averted by autophagic degradation. Thus, autophagy is an important consideration when considering means of developing treatments for NDs. Various pharmacological studies have reported that the active components in herbal medicines exhibit therapeutic benefits in NDs, for example, by inhibiting cholinesterase activity and modulating amyloid beta levels, and α-synuclein metabolism. A variety of bioactive constituents from medicinal plants are viewed as promising autophagy controllers and are revealed to recover the NDs by targeting the autophagic pathway. In the present review, we discuss the role of autophagy in the therapeutic management of several NDs. The molecular process responsible for autophagy and its importance in various NDs and the beneficial effects of medicinal plants in NDs by targeting autophagy are also discussed.
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23
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Laverdure S, Wang Z, Yang J, Yamamoto T, Thomas T, Sato T, Nagashima K, Imamichi T. Interleukin-27 promotes autophagy in human serum-induced primary macrophages via an mTOR- and LC3-independent pathway. Sci Rep 2021; 11:14898. [PMID: 34290273 PMCID: PMC8295388 DOI: 10.1038/s41598-021-94061-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 06/29/2021] [Indexed: 01/02/2023] Open
Abstract
Interleukin-27 (IL-27) is a cytokine that suppresses human immunodeficiency virus (HIV)-1 infection in macrophages and is considered as an immunotherapeutic reagent for infectious diseases. It is reported that IL-27 suppresses autophagy in Mycobacterium tuberculosis-infected macrophages; however, a role for IL-27 on autophagy induction has been less studied. In this study, we investigated the impact of IL-27 in both autophagy induction and HIV-1 infection in macrophages. Primary human monocytes were differentiated into macrophages using human AB serum (huAB) alone, macrophage-colony stimulating factor (M-CSF) alone, or a combination of IL-27 with huAB or M-CSF. Electron microscopy and immunofluorescence staining demonstrated that a 20-fold increase in autophagosome formation was only detected in IL-27 + huAB-induced macrophages. Western blot analysis indicated that the autophagosome induction was not linked to either dephosphorylation of the mammalian target of rapamycin (mTOR) or lipidation of microtubule-associated protein 1A/1B-light chain 3 (LC3), an autophagosomal marker, implying that IL-27 can induce autophagy through a novel non-canonical pathway. Here we show for the first time that IL-27 induces autophagy during monocyte-to-macrophage differentiation in a subtype-dependent manner.
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Affiliation(s)
- Sylvain Laverdure
- Laboratory of Human Retrovirology and Immunoinformatics, Frederick National Laboratory for Cancer Research, Building 550, Room 126, P.O. Box B, Frederick, MD, 21702, USA
| | - Ziqiu Wang
- Electron Microscope Laboratory, Frederick National Laboratory for Cancer Research, Frederick, MD, 21702, USA
| | - Jun Yang
- Laboratory of Human Retrovirology and Immunoinformatics, Frederick National Laboratory for Cancer Research, Building 550, Room 126, P.O. Box B, Frederick, MD, 21702, USA
| | - Takuya Yamamoto
- Laboratory of Immunosenescence, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, 567-0085, Japan
- Laboratory of Aging and Immune Regulation, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, 565-0871, Japan
| | - Tima Thomas
- Laboratory of Human Retrovirology and Immunoinformatics, Frederick National Laboratory for Cancer Research, Building 550, Room 126, P.O. Box B, Frederick, MD, 21702, USA
| | - Toyotaka Sato
- Laboratory of Human Retrovirology and Immunoinformatics, Frederick National Laboratory for Cancer Research, Building 550, Room 126, P.O. Box B, Frederick, MD, 21702, USA
| | - Kunio Nagashima
- Electron Microscope Laboratory, Frederick National Laboratory for Cancer Research, Frederick, MD, 21702, USA
| | - Tomozumi Imamichi
- Laboratory of Human Retrovirology and Immunoinformatics, Frederick National Laboratory for Cancer Research, Building 550, Room 126, P.O. Box B, Frederick, MD, 21702, USA.
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24
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Wang W, Qin Y, Song H, Wang L, Jia M, Zhao C, Gong M, Zhao W. Galectin-9 Targets NLRP3 for Autophagic Degradation to Limit Inflammation. THE JOURNAL OF IMMUNOLOGY 2021; 206:2692-2699. [PMID: 33963043 DOI: 10.4049/jimmunol.2001404] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/24/2021] [Indexed: 11/19/2022]
Abstract
NOD-, LRR-, and pyrin domain-containing protein 3 (NLRP3) inflammasome has been implicated in a variety of inflammatory disorders, and its activation should be tightly controlled to avoid detrimental effects. NLRP3 protein expression is considered as the rate-limiting step for NLRP3 inflammasome activation. In this study, we show that galectin-9 (encoded by lgals9) attenuated NLRP3 inflammasome activation by promoting the protein degradation of NLRP3 in primary peritoneal macrophages of C57BL/6J mice. Lgals9 deficiency enhances NLRP3 inflammasome activation and promotes NLRP3-dependent inflammation in C57BL/6J mice in vivo. Mechanistically, galectin-9 interacts with NLRP3, promotes the formation of NLRP3/p62 (an autophagic cargo receptor, also known as SQSTM1) complex, and thus facilitates p62-dependent autophagic degradation of NLRP3 in primary peritoneal macrophages of C57BL/6J mice and HEK293T cells. Therefore, we identify galectin-9 as an "eat-me" signal for selective autophagy of NLRP3 and uncover the potential roles of galectins in controlling host protein degradation. Furthermore, our work suggests galectin-9 as a priming therapeutic target for the diseases caused by improper NLRP3 inflammasome activation.
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Affiliation(s)
- Wenwen Wang
- Department of Immunology, Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.,State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, China
| | - Ying Qin
- Department of Immunology, Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.,State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, China
| | - Hui Song
- Department of Immunology, Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.,State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, China
| | - Lijuan Wang
- Pathology Tissue Bank, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Mutian Jia
- Department of Immunology, Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.,State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, China
| | - Chunyuan Zhao
- Department of Immunology, Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.,State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, China.,Department of Cell Biology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China; and
| | - Mouchun Gong
- Hangzhou Medical College Affiliated Lin'an People's Hospital, Hangzhou, Zhejiang, China
| | - Wei Zhao
- Department of Immunology, Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China; .,State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, China
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25
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Chen K, Yoshimura T, Gong W, Tian C, Huang J, Trinchieri G, Wang JM. Requirement of CRAMP for mouse macrophages to eliminate phagocytosed E. coli through an autophagy pathway. J Cell Sci 2021; 134:jcs252148. [PMID: 33468624 PMCID: PMC7970306 DOI: 10.1242/jcs.252148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 12/30/2020] [Indexed: 01/19/2023] Open
Abstract
Host-derived antimicrobial peptides play an important role in the defense against extracellular bacterial infections. However, the capacity of antimicrobial peptides derived from macrophages as potential antibacterial effectors against intracellular pathogens remains unknown. In this study, we report that normal (wild-type, WT) mouse macrophages increased their expression of cathelin-related antimicrobial peptide (CRAMP, encoded by Camp) after infection by viable E. coli or stimulation with inactivated E. coli and its product lipopolysaccharide (LPS), a process involving activation of NF-κB followed by protease-dependent conversion of CRAMP from an inactive precursor to an active form. The active CRAMP was required by WT macrophages for elimination of phagocytosed E. coli, with participation of autophagy-related proteins ATG5, LC3-II and LAMP-1, as well as for aggregation of the bacteria with p62 (also known as SQSTM1). This process was impaired in CRAMP-/- macrophages, resulting in retention of intracellular bacteria and fragmentation of macrophages. These results indicate that CRAMP is a critical component in autophagy-mediated clearance of intracellular E. coli by mouse macrophages.
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Affiliation(s)
- Keqiang Chen
- Laboratory of Cancer ImmunoMetabolism, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
| | - Teizo Yoshimura
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
| | - Wanghua Gong
- Basic Research Program, Leidos Biomedical Research, Inc., Frederick, MD 21702, USA
| | - Cuimeng Tian
- Laboratory of Cancer ImmunoMetabolism, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
- Beijing Tuberculosis and Thoracic Tumor Research Institute/Beijing Chest Hospital, Capital Medical University, Beijing 101149, China
| | - Jiaqiang Huang
- Laboratory of Cancer ImmunoMetabolism, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
- College of Life Sciences, Beijing Jiaotong University, Beijing 100044, China
| | - Giorgio Trinchieri
- Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA
| | - Ji Ming Wang
- Laboratory of Cancer ImmunoMetabolism, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
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26
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Kouroumalis E, Voumvouraki A, Augoustaki A, Samonakis DN. Autophagy in liver diseases. World J Hepatol 2021; 13:6-65. [PMID: 33584986 PMCID: PMC7856864 DOI: 10.4254/wjh.v13.i1.6] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 12/10/2020] [Accepted: 12/26/2020] [Indexed: 02/06/2023] Open
Abstract
Autophagy is the liver cell energy recycling system regulating a variety of homeostatic mechanisms. Damaged organelles, lipids and proteins are degraded in the lysosomes and their elements are re-used by the cell. Investigations on autophagy have led to the award of two Nobel Prizes and a health of important reports. In this review we describe the fundamental functions of autophagy in the liver including new data on the regulation of autophagy. Moreover we emphasize the fact that autophagy acts like a two edge sword in many occasions with the most prominent paradigm being its involvement in the initiation and progress of hepatocellular carcinoma. We also focused to the implication of autophagy and its specialized forms of lipophagy and mitophagy in the pathogenesis of various liver diseases. We analyzed autophagy not only in well studied diseases, like alcoholic and nonalcoholic fatty liver and liver fibrosis but also in viral hepatitis, biliary diseases, autoimmune hepatitis and rare diseases including inherited metabolic diseases and also acetaminophene hepatotoxicity. We also stressed the different consequences that activation or impairment of autophagy may have in hepatocytes as opposed to Kupffer cells, sinusoidal endothelial cells or hepatic stellate cells. Finally, we analyzed the limited clinical data compared to the extensive experimental evidence and the possible future therapeutic interventions based on autophagy manipulation.
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Affiliation(s)
- Elias Kouroumalis
- Liver Research Laboratory, University of Crete Medical School, Heraklion 71110, Greece
| | - Argryro Voumvouraki
- 1 Department of Internal Medicine, AHEPA University Hospital, Thessaloniki 54636, Greece
| | - Aikaterini Augoustaki
- Department of Gastroenterology and Hepatology, University Hospital of Crete, Heraklion 71110, Greece
| | - Dimitrios N Samonakis
- Department of Gastroenterology and Hepatology, University Hospital of Crete, Heraklion 71110, Greece.
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27
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Liu Y, Guo Y. Activation of nucleotide-binding oligomerization domain-containing protein 1 by diaminopimelic acid contributes to cerebral ischemia-induced cognitive impairment. Neurosci Lett 2020; 743:135547. [PMID: 33352290 DOI: 10.1016/j.neulet.2020.135547] [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: 09/07/2020] [Revised: 11/11/2020] [Accepted: 11/30/2020] [Indexed: 01/18/2023]
Abstract
Cerebral ischemia-reperfusion (I/R)-induced brain tissue injury is a major obstacle for acute stroke management. Nucleotide-binding oligomerization domain-containing protein 1 (NOD1) is reported to play a critical role in the regulation of myocardial or hepatic I/R injury. However, its role in cerebral I/R remains elusive. The mouse model of middle cerebral artery occlusion (MCAO) was applied in the study. The cerebral I/R mice were received either PBS or diaminopimelic acid (DAP)-pretreatment. All sham, MCAO, and MCAO + DAP mice were subject to the neurological behavior tests. The proinflammatory cytokines and autophagy-related proteins were determined by ELISA, RT-qPCR, and Western blot analysis, respectively. We found that NOD1 was substantially upregulated in the hippocampus of MCAO mice. DAP treatment significantly enhanced proinflammatory cytokine production and autophagy-related protein expression, leading to enlarged cerebral infarction size and poor neurological performance in MCAO + DAP mice compared to MCAO mice. We concluded that activation of NOD1 promotes cerebral I/R injury suggesting that NOD1 may serve as a promising target for alleviating the adverse effects of cerebral I/R.
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Affiliation(s)
- Yang Liu
- Department of Anesthesiology, Dongzhimen Hospital Beijing University of Chinese Medicine, No. 5 Haiyuncang, Dongcheng District, Beijing, 100000, China
| | - Ying Guo
- Department of Anesthesiology, Dongzhimen Hospital Beijing University of Chinese Medicine, No. 5 Haiyuncang, Dongcheng District, Beijing, 100000, China.
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28
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Changes in DNA methylation profiles of myalgic encephalomyelitis/chronic fatigue syndrome patients reflect systemic dysfunctions. Clin Epigenetics 2020; 12:167. [PMID: 33148325 PMCID: PMC7641803 DOI: 10.1186/s13148-020-00960-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 10/26/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a lifelong debilitating disease with a complex pathology not yet clearly defined. Susceptibility to ME/CFS involves genetic predisposition and exposure to environmental factors, suggesting an epigenetic association. Epigenetic studies with other ME/CFS cohorts have used array-based technology to identify differentially methylated individual sites. Changes in RNA quantities and protein abundance have been documented in our previous investigations with the same ME/CFS cohort used for this study. RESULTS DNA from a well-characterised New Zealand cohort of 10 ME/CFS patients and 10 age-/sex-matched healthy controls was isolated from peripheral blood mononuclear (PBMC) cells, and used to generate reduced genome-scale DNA methylation maps using reduced representation bisulphite sequencing (RRBS). The sequencing data were analysed utilising the DMAP analysis pipeline to identify differentially methylated fragments, and the MethylKit pipeline was used to quantify methylation differences at individual CpG sites. DMAP identified 76 differentially methylated fragments and Methylkit identified 394 differentially methylated cytosines that included both hyper- and hypo-methylation. Four clusters were identified where differentially methylated DNA fragments overlapped with or were within close proximity to multiple differentially methylated individual cytosines. These clusters identified regulatory regions for 17 protein encoding genes related to metabolic and immune activity. Analysis of differentially methylated gene bodies (exons/introns) identified 122 unique genes. Comparison with other studies on PBMCs from ME/CFS patients and controls with array technology showed 59% of the genes identified in this study were also found in one or more of these studies. Functional pathway enrichment analysis identified 30 associated pathways. These included immune, metabolic and neurological-related functions differentially regulated in ME/CFS patients compared to the matched healthy controls. CONCLUSIONS Major differences were identified in the DNA methylation patterns of ME/CFS patients that clearly distinguished them from the healthy controls. Over half found in gene bodies with RRBS in this study had been identified in other ME/CFS studies using the same cells but with array technology. Within the enriched functional immune, metabolic and neurological pathways, a number of enriched neurotransmitter and neuropeptide reactome pathways highlighted a disturbed neurological pathophysiology within the patient group.
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29
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Ma Z, Wang D, Weng J, Zhang S, Zhang Y. BNIP3 decreases the LPS-induced inflammation and apoptosis of chondrocytes by promoting the development of autophagy. J Orthop Surg Res 2020; 15:284. [PMID: 32723351 PMCID: PMC7385973 DOI: 10.1186/s13018-020-01791-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 07/13/2020] [Indexed: 12/16/2022] Open
Abstract
Background Inflammation and apoptosis of chondrocytes are the pathological bases of osteoarthritis. Autophagy could alleviate the symptoms of inflammation and apoptosis. Previous study has shown that BCL2/adenovirus E1B 19 kDa protein-interacting protein 3 (BNIP3) can induce the occurrence and development of autophagy. However, it is unknown whether autophagy induced by BNIP3 can alleviate the inflammation and apoptosis of chondrocytes. Methods We used the lentivirus to construct the overexpression BNIP3 chondrocytes. Next, the lipopolysaccharide (LPS) was used to stimulate these cells to simulate the physiological environment of osteoarthritis. After that, the enzyme-linked immunosorbent assays (ELISA) were performed to determine the levels of tumor necrosis factor-α (TNF-α), interleukin-1 beta (IL-1β), and interleukin-6 (IL-6) and the flow cytometry was performed to detect the apoptosis rates of chondrocytes. At last, the expression of autophagy-related proteins was detected with the western blotting. Results The expression of BNIP3 was suppressed after treatment with LPS. However, overexpression of BNIP3 inhibited the secretion of proinflammatory factors (TNF-α, IL-1β, and IL-6) and decreased the apoptosis of chondrocytes. Furthermore, overexpression of BNIP3 led to the upregulation of autophagy-related protein expression including little computer 3 (LC3), autophagy-related protein 7 (ATG7), and Beclin-1. Application of autophagy inhibitor recovered the expression of proinflammatory factors and apoptosis rates of chondrocytes. Conclusions BNIP3 decreased the LPS-induced inflammation and apoptosis of chondrocytes by activating the autophagy.
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Affiliation(s)
- Zetao Ma
- Orthopaedic Department, PKU Shenzhen Hospital, No. 1120, Road Lianhua, Shenzhen, 518036, Guangdong Province, China.
| | - Deli Wang
- Orthopaedic Department, PKU Shenzhen Hospital, No. 1120, Road Lianhua, Shenzhen, 518036, Guangdong Province, China
| | - Jian Weng
- Orthopaedic Department, PKU Shenzhen Hospital, No. 1120, Road Lianhua, Shenzhen, 518036, Guangdong Province, China
| | - Sheng Zhang
- Orthopaedic Department, PKU Shenzhen Hospital, No. 1120, Road Lianhua, Shenzhen, 518036, Guangdong Province, China
| | - Yuanshi Zhang
- Orthopaedic Department, PKU Shenzhen Hospital, No. 1120, Road Lianhua, Shenzhen, 518036, Guangdong Province, China
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30
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Wang L, Tan Z, Zhang Y, Kady Keita N, Liu H, Zhang Y. ADAM12 silencing promotes cellular apoptosis by activating autophagy in choriocarcinoma cells. Int J Oncol 2020; 56:1162-1174. [PMID: 32319603 PMCID: PMC7115740 DOI: 10.3892/ijo.2020.5007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 01/17/2020] [Indexed: 12/14/2022] Open
Abstract
ADAM metallopeptidase domain 12 (ADAM12) has been demonstrated to mediate cell proliferation and apoptosis resistance in several types of cancer cells. However, the effect of ADAM12 silencing on the proliferation and apoptosis of choriocarcinoma cells remains unknown. The present study revealed that ADAM12 silencing significantly inhibited cellular activity and proliferation in the human choriocarcinoma JEG3 cell line and increased the rate of apoptosis. In addition, ADAM12 silencing significantly increased the expression levels of the autophagy proteins microtubule-associated protein-light-chain 3 (LC3B) and autophagy related 5 (ATG5) and the fluorescence density of LC3B in JEG-3 cells. However, the suppression of autophagy by 3-methyladenine could block ADAM12 silencing-induced cellular apoptosis. ADAM12 silencing reduced the levels of the inflammatory factors interleukin-1β, interferon-γ and TNF-α, and inactivated nuclear p65-NF-κB and p-mTOR in JEG-3 cells. The downregulation of p-mTOR expression by ADAM12 silencing was rescued in 3-methyladenine-treated JEG-3 cells, indicating that mTOR might participate in the autophagy-mediated pro-apoptotic effect of ADAM12 silencing. In conclusion, ADAM12 silencing promoted cellular apoptosis in human choriocarcinoma JEG3 cells, which might be associated with autophagy and the mTOR response. These findings indicate that ADAM12 silencing might be a potential novel therapeutic target for choriocarcinoma.
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Affiliation(s)
- Lin Wang
- Department of Cardiovascular Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China
| | - Zhihui Tan
- Department of Gynecology, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China
| | - Ying Zhang
- Department of Gynecology, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China
| | - Nankoria Kady Keita
- Department of Gynecology, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China
| | - Huining Liu
- Department of Gynecology, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China
| | - Yu Zhang
- Department of Gynecology, Xiangya Hospital, Central South University, Changsha, Hunan 410078, P.R. China
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31
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Ponnalagu D, Singh H. Insights Into the Role of Mitochondrial Ion Channels in Inflammatory Response. Front Physiol 2020; 11:258. [PMID: 32327997 PMCID: PMC7160495 DOI: 10.3389/fphys.2020.00258] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/05/2020] [Indexed: 12/14/2022] Open
Abstract
Mitochondria are the source of many pro-inflammatory signals that cause the activation of the immune system and generate inflammatory responses. They are also potential targets of pro-inflammatory mediators, thus triggering a severe inflammatory response cycle. As mitochondria are a central hub for immune system activation, their dysfunction leads to many inflammatory disorders. Thus, strategies aiming at regulating mitochondrial dysfunction can be utilized as a therapeutic tool to cure inflammatory disorders. Two key factors that determine the structural and functional integrity of mitochondria are mitochondrial ion channels and transporters. They are not only important for maintaining the ionic homeostasis of the cell, but also play a role in regulating reactive oxygen species generation, ATP production, calcium homeostasis and apoptosis, which are common pro-inflammatory signals. The significance of the mitochondrial ion channels in inflammatory response is still not clearly understood and will need further investigation. In this article, we review the different mechanisms by which mitochondria can generate the inflammatory response as well as highlight how mitochondrial ion channels modulate these mechanisms and impact the inflammatory processes.
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Affiliation(s)
- Devasena Ponnalagu
- Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, Wexner Medical Center, Columbus, OH, United States
| | - Harpreet Singh
- Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University, Wexner Medical Center, Columbus, OH, United States
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Ma YY, Li JR, Peng ZG, Zhang JP. IL28A protein homotetramer structure is required for autolysosomal degradation of HCV-NS5A in vitro. Cell Death Dis 2020; 11:200. [PMID: 32205851 PMCID: PMC7090004 DOI: 10.1038/s41419-020-2400-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 02/27/2020] [Accepted: 02/28/2020] [Indexed: 12/03/2022]
Abstract
Interferon lambda-2 (IL28A) has a wide antiviral effect with fewer side-effects. Autophagy is a host mechanism to maintain intracellular homeostasis and defends invasion of pathogenic microorganisms. HCV NS5A can disable host defense systems to support HCV replication. Thus, molecular mechanism of interaction among interferon lambda, autophagy, and HCV was concerned and explored in this study. We report that HCV NS5A activated an incomplete autophagy by promoting the autophagic ubiquitylation-like enzymes ATG3, ATG5, ATG7, ATG10, and autophagosome maker LC3B, but blocked autophagy flux; IL28A bound to NS5A at NS5A-ISDR region, and degraded HCV-NS5A by promoting autolysosome formations in HepG2 cells. A software prediction of IL28A protein conformation indicated a potential structure of IL28A homotetramer; the first α-helix of IL28A locates in the interfaces among the four IL28A chains to maintain IL28A homotetrameric conformation. Co-IP and cell immunofluorescence experiments with sequential deletion mutants demonstrate that IL28A preferred a homotetramer conformation to a monomer in the cells; the IL28A homotetramer is positively correlated with autolysosomal degradation of HCV NS5A and the other HCV proteins. Summarily, the first α-helix of IL28A protein is the key domain for maintaining IL28A homotetramer which is required for promoting formation of autolysosomes and degradation of HCV proteins in vitro.
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Affiliation(s)
- Yuan-Yuan Ma
- Key Laboratory of Biotechnology of Antibiotics, the National Health Commission (NHC), Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Jian-Rui Li
- Key Laboratory of Biotechnology of Antibiotics, the National Health Commission (NHC), Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Zong-Gen Peng
- Key Laboratory of Biotechnology of Antibiotics, the National Health Commission (NHC), Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Jing-Pu Zhang
- Key Laboratory of Biotechnology of Antibiotics, the National Health Commission (NHC), Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.
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Hyperactive Innate Immunity Causes Degeneration of Dopamine Neurons upon Altering Activity of Cdk5. Cell Rep 2020; 26:131-144.e4. [PMID: 30605670 PMCID: PMC6442473 DOI: 10.1016/j.celrep.2018.12.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 10/10/2018] [Accepted: 12/05/2018] [Indexed: 11/23/2022] Open
Abstract
Innate immunity is central to the pathophysiology of neurodegenerative disorders, but it remains unclear why immunity is altered in the disease state and whether changes in immunity are a cause or a consequence of neuronal dysfunction. Here, we identify a molecular pathway that links innate immunity to age-dependent loss of dopaminergic neurons in Drosophila. We find, first, that altering the expression of the activating subunit of the Cdk5 protein kinase (Cdk5α) causes severe disruption of autophagy. Second, this disruption of autophagy is both necessary and sufficient to cause the hyperactivation of innate immunity, particularly expression of anti-microbial peptides. Finally, it is the upregulation of immunity that induces the age-dependent death of dopaminergic neurons. Given the dysregulation of Cdk5 and innate immunity in human neurodegeneration and the conserved role of the kinase in the regulation of autophagy, this sequence is likely to have direct application to the chain of events in human neurodegenerative disease. How can one disentangle the many pathologies of neurodegeneration from one another and from normal aging? Shukla et al. show that a mutation in Drosophila kills neurons by impairing autophagy, which in turn stimulates neurotoxic levels of innate immunity, and this acts synergistically with a parallel pathway that accelerates aging.
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Gao Q, Wang Y, Ma N, Dai H, Roy AC, Chang G, Shi X, Shen X. Sodium valproate attenuates the iE-DAP induced inflammatory response by inhibiting the NOD1-NF-κB pathway and histone modifications in bovine mammary epithelial cells. Int Immunopharmacol 2020; 83:106392. [PMID: 32182568 DOI: 10.1016/j.intimp.2020.106392] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/14/2020] [Accepted: 03/08/2020] [Indexed: 12/30/2022]
Abstract
The anti-inflammatory effects of sodium valproate (VPA) in vivo and in vitro have been demonstrated in recent studies. The aim of this study was to evaluate whether VPA can suppress inflammation in bovine mammary epithelial cells (BMECs) stimulated by γ-D-glutamyl-meso-diaminopimelic acid (iE-DAP). First, the concentration and treatment points of iE-DAP and VPA were optimized. Then, BMECs were cultured in complete media and separated into four groups: untreated control cells (CON group), cells stimulated by 10 μg/mL iE-DAP for 6 h (DAP group), cells stimulated by 0.5 mmol/L VPA for 6 h (VPA group), and cells pretreated with VPA (0.5 mmol/L) for 6 h followed by 10 μg/mL of iE-DAP for 6 h (VD group). The results showed that the level of interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) in the culture medium increased in the iE-DAP-treated cells and that pretreatment with VPA reversed this increase. iE-DAP increased both mRNA and protein expression levels of nucleotide-binding oligomerization domain-containing protein 1 (NOD1) and receptor-interacting protein kinas (RIPK2) and activated inhibitor of NF-κB (IκB) and nuclear factor-kappa B p65 (NF-κB p65) through phosphorylation. Upon activation of the NF-κB pathway, the expression of the pro-inflammatory cytokines IL-6, interleukin-8 (IL-8) and interleukin-1β (IL-1β), the acute phase protein serum amyloid A 3 (SAA3) and the lingual antimicrobial peptide (LAP) but not haptoglobi (HP) or bovine neutrophil beta defensing 5 (BNBD5) were increased in the DAP group. The VPA pretreatment induced the acetylation of signal transducers and activators of transcription(STAT1) and histone 3 (H3) by inhibiting histone deacetylase (HDAC) and then suppressed the NF-κB pathway. Moreover, VPA induced autophagy and reduced apoptosis in BMECs in the VD group. These results suggested that VPA treatment can attenuate the inflammatory response induced by iE-DAP.
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Affiliation(s)
- Qianyun Gao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yan Wang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Nana Ma
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Hongyu Dai
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Animesh Chandra Roy
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Guangjun Chang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xiaoli Shi
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xiangzhen Shen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China.
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Protein Kinase C Isozymes and Autophagy during Neurodegenerative Disease Progression. Cells 2020; 9:cells9030553. [PMID: 32120776 PMCID: PMC7140419 DOI: 10.3390/cells9030553] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 01/27/2020] [Accepted: 02/04/2020] [Indexed: 12/16/2022] Open
Abstract
Protein kinase C (PKC) isozymes are members of the Serine/Threonine kinase family regulating cellular events following activation of membrane bound phospholipids. The breakdown of the downstream signaling pathways of PKC relates to several disease pathogeneses particularly neurodegeneration. PKC isozymes play a critical role in cell death and survival mechanisms, as well as autophagy. Numerous studies have reported that neurodegenerative disease formation is caused by failure of the autophagy mechanism. This review outlines PKC signaling in autophagy and neurodegenerative disease development and introduces some polyphenols as effectors of PKC isozymes for disease therapy.
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Ming K, He M, Su L, Du H, Wang D, Wu Y, Liu J. The inhibitory effect of phosphorylated Codonopsis pilosula polysaccharide on autophagosomes formation contributes to the inhibition of duck hepatitis A virus replication. Poult Sci 2020; 99:2146-2156. [PMID: 32241500 PMCID: PMC7587719 DOI: 10.1016/j.psj.2019.11.060] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 12/11/2022] Open
Abstract
Duck hepatitis A virus type 1 (DHAV) infection causes duck viral hepatitis and results in enormous loss to poultry farming industry. We reported that phosphorylated Codonopsis pilosula polysaccharide (pCPPS) inhibited DHAV genome replication. Here we further explored its underlying antiviral mechanisms. Autophagosomes formation is essential for the genome replication of picornaviruses. In this study, Western blot, confocal microscopy observation, and ELISA methods were performed to analyze polysaccharides' effects on autophagy by the in vitro and in vivo experiments. Results obtained from in vitro and in vivo experiments showed that Codonopsis pilosula polysaccharide did not play a role in regulating autophagy and had no therapeutic effects on infected ducklings. However, pCPPS treatment downregulated LC3-II expression level activated by DHAV and rapamycin, indicating the inhibition of autophagosomes formation. The interdiction of autophagosomes formation resulted in the inhibition of DHAV genome replication. Further study showed that pCPPS treatment reduced the concentration of phosphatidylinositol-3-phosphate (PI3P), an important component of membrane, in cells and serum, and consequently, autophagosomes formation was downregulated. In vivo experiments also verified the therapeutic effect of pCPPS. Phosphorylated Codonopsis pilosula polysaccharide treatment increased the infected ducklings' survival rate and alleviated hepatic injury. Our studies verified the effects of pCPPS against DHAV infection in duck embryo hepatocytes and ducklings and confirmed that phosphorylated modification enhanced the bioactivities of polysaccharides. The results also stated pCPPS's antiviral mechanisms, provided fundamental basis for the development of new anti-DHAV agents.
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Affiliation(s)
- Ke Ming
- Institute of Traditional Chinese Veterinary Medicine and MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Miao He
- Institute of Traditional Chinese Veterinary Medicine and MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Linglin Su
- Institute of Traditional Chinese Veterinary Medicine and MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Hongxu Du
- Institute of Traditional Chinese Veterinary Medicine and MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Deyun Wang
- Institute of Traditional Chinese Veterinary Medicine and MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yi Wu
- Institute of Traditional Chinese Veterinary Medicine and MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Jiaguo Liu
- Institute of Traditional Chinese Veterinary Medicine and MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, PR China.
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Guan XL, Zhang BC, Sun L. Japanese flounder pol-miR-3p-2 suppresses Edwardsiella tarda infection by regulation of autophagy via p53. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 103:103531. [PMID: 31668931 DOI: 10.1016/j.dci.2019.103531] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 10/23/2019] [Accepted: 10/23/2019] [Indexed: 06/10/2023]
Abstract
MicroRNAs (miRNAs) are post-transcriptional regulators that play vital roles in diverse physiological processes including immunity. In this study, we investigated the regulatory mechanism and function of a novel Japanese flounder (Paralichthys olivaceus) miRNA, pol-miR-3p-2. pol-miR-3p-2 was responsive in expression to the infection of the bacterial pathogen Edwardsiella tarda. pol-miR-3p-2 negatively regulated the expression of p53 through interaction with the 3'UTR of p53. Overexpression of pol-miR-3p-2 promoted autophagy, resulting in augmented production of LC3-II, while knockdown of p53 increased the level of beclin, a key factor of autophagy. In vivo and in vitro studies showed that E. tarda infection induced autophagy in flounder, and pol-miR-3p-2 inhibited the infectivity of E. tarda. Together these results indicate that pol-miR-3p-2 regulates autophagy through the target gene p53, thus revealing a regulatory link between p53 and autophagy in teleost, and that pol-miR-3p-2 plays an important role in the immune defense against E. tarda.
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Affiliation(s)
- Xiao-Lu Guan
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Bao-Cun Zhang
- Department of Biomedicine and Aarhus Research Center for Innate Immunity, Aarhus University, Aarhus, Denmark
| | - Li Sun
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
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Luo Y, Qian Y. Effect of combined parenteral and enteral nutrition for patients with a critical illness: A meta-analysis of randomized controlled trials. Medicine (Baltimore) 2020; 99:e18778. [PMID: 32011471 PMCID: PMC7220180 DOI: 10.1097/md.0000000000018778] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Whether combined parenteral nutrition (PN) and enteral nutrition (EN) is superior to EN alone remains controversial. OBJECTIVES This study aimed to evaluate the efficacy and safety of combined PN and EN versus EN alone for critically ill patients based on published randomized controlled trials (RCTs). DATA SOURCES Studies designed as RCTs evaluating the treatment effectiveness of combined PN and EN versus EN alone for critically ill patients were identified from PubMed, Embase, and the Cochrane Library from inception to April 2019. METHODS The pooled relative risks and weighted mean differences with corresponding 95% confidence intervals were calculated using the random-effects model. Twelve RCTs recruiting a total of 5609 adults and 1440 children were selected for the final meta-analysis. RESULTS The summary relative risks indicated that combined PN and EN was not associated with the risk of all-cause mortality, respiratory infection, urinary tract infection, and nutrition-related complications. Moreover, combined PN and EN was associated with longer hospital stay and higher albumin and prealbumin levels compared with EN alone. No significant differences were, however, found between combined PN and EN and EN alone in terms of ventilatory support, intensive care unit stay, and transferrin and C-reactive protein levels. CONCLUSIONS This study showed that combined PN and EN significantly increased hospital stay duration and albumin and prealbumin levels compared with EN alone for critically ill patients. Large-scale RCTs should be conducted to compare the treatment effectiveness of combined PN and EN versus EN alone for critically ill patients due to a specific cause.
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Wang H, Han X, Xu J. Lysosome as the Black Hole for Checkpoint Molecules. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1248:325-346. [PMID: 32185717 DOI: 10.1007/978-981-15-3266-5_14] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Lysosomes, as digestive organelles full of hydrolases, have complex functions and play an important role in cellular physiological and pathological processes. In normal physiological conditions, lysosomes can sense the nutritional state and be responsible for recycling raw materials to provide nutrients, affecting cell signaling pathways and regulating cell proliferation. Lysosomes are related to many diseases and associated with metastasis and drug resistance of tumors. In recent years, much attention has been paid to the tumor immunotherapy especially immune checkpoint blockade therapy. Accumulating data suggest that lysosomes may serve as a major destruction for immune checkpoint molecules, and secretory lysosomes can temporarily store immune checkpoint proteins. Once activated, the compounds contained in secretory lysosomes are released to the surface of cell membrane rapidly. Inhibitions of lysosomes can overcome the chemoresistance of some tumors and enhance the efficacy of immunotherapy.
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Affiliation(s)
- Huanbin Wang
- School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China.
| | - Xue Han
- Institutes of Biological Sciences, Fudan University, Shanghai, 200032, China
| | - Jie Xu
- Institutes of Biomedical Sciences, Zhongshan-Xuhui Hospital, Fudan University, Shanghai, 200032, China
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40
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The Autophagy Protein ATG16L1 Is Required for Sindbis Virus-Induced eIF2α Phosphorylation and Stress Granule Formation. Viruses 2019; 12:v12010039. [PMID: 31905741 PMCID: PMC7019544 DOI: 10.3390/v12010039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/18/2019] [Accepted: 12/26/2019] [Indexed: 12/22/2022] Open
Abstract
Sindbis virus (SINV) infection induces eIF2α phosphorylation, which leads to stress granule (SG) assembly. SINV infection also stimulates autophagy, which has an important role in controlling the innate immune response. The importance of autophagy to virus-induced translation arrest is not well understood. In this study, we show that the autophagy protein ATG16L1 not only regulates eIF2α phosphorylation and the translation of viral and antiviral proteins, but also controls SG assembly. Early in infection (2hpi), capsids were recruited by host factors Cytotoxic Granule-Associated RNA Binding Protein (TIA1), Y-box binding protein 1 (YBX1), and vasolin-containing protein 1 (VCP), to a single perinuclear body, which co-localized with the viral pattern recognition sensors, double stranded RNA-activated protein-kinase R (PKR) and RIG-I. By 6hpi, there was increased eIF2α phosphorylation and viral protein synthesis. However, in cells lacking the autophagy protein ATG16L1, SG assembly was inhibited and capsid remained in numerous small foci in the cytoplasm containing YBX1, TIA1 with RIG-I, and these persisted for over 8hpi. In the absence of ATG16L1, there was little phosphorylation of eIF2α and low levels of viral protein synthesis. Compared to wild type cells, there was potentiated interferon protein and interferon-stimulated gene (ISG) mRNA expression. These results show that ATG16L1 is required for maximum eIF2α phosphorylation, proper SG assembly into a single perinuclear focus, and for attenuating the innate immune response. Therefore, this study shows that, in the case of SINV, ATG16L1 is pro-viral, required for SG assembly and virus replication.
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Toll-Like Receptor 2–Mediated Autophagy Promotes Microglial Cell Death by Modulating the Microglial M1/M2 Phenotype. Inflammation 2019; 43:701-711. [DOI: 10.1007/s10753-019-01152-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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42
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Veras PST, de Menezes JPB, Dias BRS. Deciphering the Role Played by Autophagy in Leishmania Infection. Front Immunol 2019; 10:2523. [PMID: 31736955 PMCID: PMC6838865 DOI: 10.3389/fimmu.2019.02523] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 10/10/2019] [Indexed: 01/11/2023] Open
Abstract
In recent decades, studies have shown that, depending on parasite species and host background, autophagy can either favor infection or promote parasite clearance. To date, relatively few studies have attempted to assess the role played by autophagy in Leishmania infection. While it has been consistently shown that Leishmania spp. induce autophagy in a variety of cell types, published results regarding the effects of autophagic modulation on Leishmania survival are contradictory. The present review, after a short overview of the general aspects of autophagy, aims to summarize the current body of knowledge surrounding how Leishmania spp. adaptively interact with macrophages, the host cells mainly involved in controlling leishmaniasis. We then explore the scarce studies that have investigated interactions between these parasite species and the autophagic pathway, and finally present a critical perspective on how autophagy influences infection outcome.
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Affiliation(s)
- Patricia Sampaio Tavares Veras
- Laboratory of Host - Parasite Interaction and Epidemiology, Gonçalo Moniz Institute, Salvador, Brazil.,National Institute of Science and Technology of Tropical Diseases - CNPq, Salvador, Brazil
| | | | - Beatriz Rocha Simões Dias
- Laboratory of Host - Parasite Interaction and Epidemiology, Gonçalo Moniz Institute, Salvador, Brazil
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Zheng Z, Wu Y, Li Z, Ye L, Lu Q, Zhou Y, Yuan Y, Jiang T, Xie L, Liu Y, Chen D, Ye J, Nimlamool W, Zhang H, Xiao J. Valproic acid affects neuronal fate and microglial function via enhancing autophagic flux in mice after traumatic brain injury. J Neurochem 2019; 154:284-300. [PMID: 31602651 DOI: 10.1111/jnc.14892] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 10/05/2019] [Accepted: 10/09/2019] [Indexed: 12/11/2022]
Abstract
In recent years, many studies have focused on autophagy, an evolutionarily conserved mechanism that relies on lysosomes to achieve cellular metabolic requirements and organelle turnover, and revealed its important role in animal models of traumatic injury. Autophagy is a double-edged sword. Appropriate levels of autophagy can promote the removal of abnormal proteins or damaged organelles, while hyperactivated autophagy can induce autophagic apoptosis. However, recent studies suggest that autophagic flux seems to be blocked after traumatic brain injury (TBI), which contributes to the apoptosis of brain cells. In this study, valproic acid (VPA), which was clinically used for epilepsy treatment, was used to treat TBI. The Morris water maze test, hematoxylin & eosin staining and Nissl staining were first conducted to confirm that VPA treatment had a therapeutic effect on mice after TBI. Western blotting, enzyme-linked immunosorbent assay and immunofluorescence staining were then performed to reveal that VPA treatment reversed TBI-induced blockade of autophagic flux, which was accompanied by a reduced inflammatory response. In addition, the variations in activation and phenotypic polarization of microglia were observed after VPA treatment. Nevertheless, the use of the autophagy inhibitor 3-methyladenine partially abolished VPA-induced neuroprotection and the regulation of microglial function after TBI, resulting in the deterioration of the central nervous system microenvironment and neurological function. Collectively, VPA treatment reversed the TBI-induced blockade of autophagic flux in the mouse brain cortex, subsequently inhibiting brain cell apoptosis and affecting microglial function to achieve the promotion of functional recovery in mice after TBI. Cover Image for this issue: doi: 10.1111/jnc.14755.
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Affiliation(s)
- Zhilong Zheng
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yanqing Wu
- The Institute of Life Sciences, Wenzhou University, Wenzhou, Zhejiang, China
| | - Zhengmao Li
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Luxia Ye
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Qi Lu
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yajiao Zhou
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yuan Yuan
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ting Jiang
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Ling Xie
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yanlong Liu
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Daqing Chen
- Department of Emergency, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Junming Ye
- Department of Anesthesia, The First Affiliated Hospital, Gangnan Medical University Ganzhou, Jiangxi, China
| | - Wutigri Nimlamool
- Department of Pharmacology, Faculty of medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Hongyu Zhang
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jian Xiao
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang, China
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Affiliation(s)
- Jie Ji
- The Institute for Molecular Engineering, The University of Chicago, Chicago, IL 60637, United States
| | - Kai-jian Xia
- Changshu affiliated Hospital of Soochow University (Changshu No.1 People's Hospital), Jiangsu Changshu 215500, China
| | - Junwei Tang
- Liver Transplantation Center of The First Affiliated Hospital and Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, China
| | - Runqiu Jiang
- University of Hawaii Cancer Center, Honolulu, HI 96813, United States
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Guo ML, Buch S. Neuroinflammation & pre-mature aging in the context of chronic HIV infection and drug abuse: Role of dysregulated autophagy. Brain Res 2019; 1724:146446. [PMID: 31521638 DOI: 10.1016/j.brainres.2019.146446] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 08/29/2019] [Accepted: 09/10/2019] [Indexed: 12/15/2022]
Abstract
In the era of combined antiretroviral therapy (cART), HIV-1 infection has transformed from adeath sentenceto a manageable, chronic disease. Although the lifeexpectancy of HIV+ individuals is comparable to that of the uninfectedsubjects paradoxically, there is increased prevalence ofage-associatedcomorbidities such asatherosclerosis, diabetes, osteoporosis & neurological deficits in the context of HIV infection. Drug abuse is a commoncomorbidityofHIV infection andis often associated withincreased neurological complications. Chronic neuroinflammation (abnormal microglial and astrocyte activation) and neuronal synaptodendritic injury are the features of CNS pathology observed inHIV (+) individualsthat are takingcART & that abuse drugs. Neuroinflammation is thedrivingforceunderlying prematureaging associated with HIV (+) infection, cART and drugs of abuse. Autophagy is a highly conserved process critical for maintaining cellular homeostasis. Dysregulated autophagyhas been shown to be linked with abnormal immune responses & aging. Recent emerging evidence implicatesthe role ofHIV/HIV proteins, cART, & abused drugsin disrupting theautophagy process in brain cells such as microglia, astrocytes, and neurons. It can thus be envisioned that co-exposure of CNS cells to HIV proteins, cART and/or abused drugs couldhavesynergistic effects on theautophagy process, thereby leading to exaggerated microglial/astrocyte activation, ultimately, promotingthe aging process. Restoration of autophagic functioncould thusprovide an alternative therapeuticstrategy formitigating neuroinflammation & ameliorating the premature aging process. The current review aims to unravel the role of dysregulated autophagy in the context of single or co-exposure of microglia, astrocytes, and neurons to HIV/HIV proteins, drugs of abuse &/or cART and will also discuss the pathways involved in dysregulated autophagy-mediated neuroinflammation.
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Affiliation(s)
- Ming-Lei Guo
- Department of Pharmacology and Experimental Neuroscience, 985880 Nebraska Medical Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Shilpa Buch
- Department of Pharmacology and Experimental Neuroscience, 985880 Nebraska Medical Center, University of Nebraska Medical Center, Omaha, NE 68198, USA.
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Wang HY, Li C, Liu WH, Deng FM, Ma Y, Guo LN, Kong DH, Hu KA, Liu Q, Wu J, Sun J, Liu YL. Autophagy inhibition via Becn1 downregulation improves the mesenchymal stem cells antifibrotic potential in experimental liver fibrosis. J Cell Physiol 2019; 235:2722-2737. [PMID: 31508820 PMCID: PMC6916329 DOI: 10.1002/jcp.29176] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 08/26/2019] [Indexed: 02/06/2023]
Abstract
Liver fibrosis (LF) is the result of a vicious cycle between inflammation-induced chronic hepatocyte injury and persistent activation of hepatic stellate cells (HSCs). Mesenchymal stem cell (MSC)-based therapy may represent a potential remedy for treatment of LF. However, the fate of transplanted MSCs in LF remains largely unknown. In the present study, the fate and antifibrotic effect of MSCs were explored in a LF model induced by CCl4 in mouse. Additionally, MSCs were stimulated in vitro with LF-associated factors, tumor necrosis factor-α (TNF-α), interferon-γ (IFN-γ), and transforming growth factor-β1 (TGF-β1), to mimic the LF microenvironment. We unveiled that MSCs exhibited autophagy in response to the LF microenvironment through Becn1 upregulation both in vivo and in vitro. However, autophagy suppression induced by Becn1 knockdown in MSCs resulted in enhanced antifibrotic effects on LF. The improved antifibrotic potential of MSCs may be attributable to their inhibitory effects on T lymphocyte infiltration, HSCs proliferation, as well as production of TNF-α, IFN-γ, and TGF-β1, which may be partially mediated by elevated paracrine secretion of PTGS2/PGE2 . Thus, autophagy manipulation in MSCs may be a novel strategy to promote their antifibrotic efficacy.
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Affiliation(s)
- Hang Yu Wang
- Key Laboratory of Xingjiang Phytomedicine Resources and Utilization, Ministry of Education, School of Pharmacy, Shihezi University, Shihezi, China
| | - Can Li
- Department of Pathology and Pathophysiology, Chengdu Medical College, Chengdu, China.,Sichuan Clinical Research Center for Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Wei Hua Liu
- Sichuan Clinical Research Center for Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Feng Mei Deng
- Department of Pathology and Pathophysiology, Chengdu Medical College, Chengdu, China.,Sichuan Clinical Research Center for Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Yan Ma
- Department of Surgery, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Li Na Guo
- Department of Pathology and Pathophysiology, Chengdu Medical College, Chengdu, China
| | - De Hua Kong
- Sichuan Clinical Research Center for Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Kang An Hu
- Sichuan Clinical Research Center for Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Qin Liu
- Sichuan Clinical Research Center for Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Jiang Wu
- Deep-Underground Medicine Laboratory, West China Hospital of Sichuan University, Chengdu, China
| | - Jing Sun
- Department of Pathology and Pathophysiology, Chengdu Medical College, Chengdu, China.,Sichuan Clinical Research Center for Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Yi Lun Liu
- Sichuan Clinical Research Center for Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China.,Department of Surgery, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
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47
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Mo LY, Jia XY, Liu CC, Zhou XD, Xu X. [Role of autophagy in the pathogenesis of periodontitis]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2019; 37:422-427. [PMID: 31512838 DOI: 10.7518/hxkq.2019.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Periodontitis is a chronic inflammatory disease of periodontal tissues initiated by oral biofilm. Cellular autophagy is an effective weapon against bacterial infection. Recent studies have shown that autophagy not only promotes the removal of bacteria and toxins from infected cells, but also helps to suppress the inflammatory response to maintain the homeostasis of intracellular environment, which is closely related to the development of periodontitis. Here, we reviewed the relationship between autophagy and periodontitis from three aspects: the interactions between autophagy and periodontal pathogen infection, the regulation of autophagy and immune inflammatory responses, and the relationship between autophagy and alveolar bone metabolism. We aim to provide ideas for further study on the mechanisms of autophagy and periodontitis, and ultimately contribute to a better prevention and treatment of periodontitis.
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Affiliation(s)
- Long-Yi Mo
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xiao-Yue Jia
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Cheng-Cheng Liu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xue-Dong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xin Xu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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48
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He X, Zhu Y, Zhang Y, Geng Y, Gong J, Geng J, Zhang P, Zhang X, Liu N, Peng Y, Wang C, Wang Y, Liu X, Wan L, Gong F, Wei C, Zhong H. RNF34 functions in immunity and selective mitophagy by targeting MAVS for autophagic degradation. EMBO J 2019; 38:e100978. [PMID: 31304625 PMCID: PMC6627233 DOI: 10.15252/embj.2018100978] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 05/06/2019] [Accepted: 05/13/2019] [Indexed: 12/13/2022] Open
Abstract
Viral infection triggers the formation of mitochondrial antiviral signaling protein (MAVS) aggregates, which potently promote immune signaling. Autophagy plays an important role in controlling MAVS-mediated antiviral signaling; however, the exact molecular mechanism underlying the targeted autophagic degradation of MAVS remains unclear. Here, we investigated the mechanism by which RNF34 regulates immunity and mitophagy by targeting MAVS. RNF34 binds to MAVS in the mitochondrial compartment after viral infection and negatively regulates RIG-I-like receptor (RLR)-mediated antiviral immunity. Moreover, RNF34 catalyzes the K27-/K29-linked ubiquitination of MAVS at Lys 297, 311, 348, and 362 Arg, which serves as a recognition signal for NDP52-dependent autophagic degradation. Specifically, RNF34 initiates the K63- to K27-linked ubiquitination transition on MAVS primarily at Lys 311, which facilitates the autophagic degradation of MAVS upon RIG-I stimulation. Notably, RNF34 is required for the clearance of damaged mitochondria upon viral infection. Thus, we elucidated the mechanism by which RNF34-mediated autophagic degradation of MAVS regulates the innate immune response, mitochondrial homeostasis, and infection.
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Affiliation(s)
- Xiang He
- Beijing Institute of BiotechnologyBeijingChina
| | - Yongjie Zhu
- Beijing Institute of BiotechnologyBeijingChina
| | | | - Yunqi Geng
- Beijing Institute of BiotechnologyBeijingChina
- Institute of Physical Science and Information TechnologyAnhui UniversityHefeiChina
| | - Jing Gong
- Beijing Institute of BiotechnologyBeijingChina
- Institute of Physical Science and Information TechnologyAnhui UniversityHefeiChina
| | - Jin Geng
- Beijing Institute of BiotechnologyBeijingChina
- Institute of Physical Science and Information TechnologyAnhui UniversityHefeiChina
| | | | | | - Ning Liu
- Beijing Institute of BiotechnologyBeijingChina
| | - Yumeng Peng
- Beijing Institute of BiotechnologyBeijingChina
| | | | - Yujie Wang
- Beijing Institute of BiotechnologyBeijingChina
- Institute of Physical Science and Information TechnologyAnhui UniversityHefeiChina
| | - Xin Liu
- Beijing Institute of BiotechnologyBeijingChina
| | - Luming Wan
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineAcademy of Military Medical SciencesBeijingChina
| | - Feng Gong
- Stem Cell and Regenerative Medicine LabInstitute of Health Service and Transfusion MedicineAcademy of Military Medical SciencesBeijingChina
| | - Congwen Wei
- Beijing Institute of BiotechnologyBeijingChina
| | - Hui Zhong
- Beijing Institute of BiotechnologyBeijingChina
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49
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An update on the interactions between Alzheimer's disease, autophagy and inflammation. Gene 2019; 705:157-166. [DOI: 10.1016/j.gene.2019.04.040] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/14/2019] [Accepted: 04/15/2019] [Indexed: 12/20/2022]
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50
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Tian Z, Wang M, Yao N, Yang S, Liu J, Yang Y, Chen T, Zhao Y, He Y. Expression of autophagy-modulating genes in peripheral blood mononuclear cells from familial clustering patients with chronic hepatitis B virus infection. Arch Virol 2019; 164:2005-2013. [PMID: 31102052 DOI: 10.1007/s00705-019-04248-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 12/08/2018] [Indexed: 02/07/2023]
Abstract
We previously found that genetic factors are associated with a familial predisposition for developing liver cirrhosis and hepatocellular carcinoma during chronic hepatitis B virus (HBV) infection. Autophagy has been shown to play a role in HBV replication and the course of disease. More than 190 host genes have been identified that modify the process of autophagy, but which of these genes are involved in chronicity of HBV infection and how this occurs remains unclear. Chronic hepatitis B (CHB) patients were recruited to investigate the expression of autophagy-modulating genes in peripheral blood mononuclear cells (PBMCs). mRNA prepared from PBMCs from members of two families with clustering HBV infection, including 11 CHB patients and nine healthy spouses, was hybridized to high-density oligonucleotide arrays. Immunoblot analysis was used to determine the level of autophagy. Of the 192 autophagy-modulating genes, 18 were found to be differently expressed. Of these, 11 displayed decreased expression in CHB patients, while seven displayed increased expression compared to those in healthy controls. Functional analysis showed that these genes are closely involved in initiation, nucleation, elongation of phagophores, formation of autophagosomes, transportation to lysosomes, and the process of degradation. Western blot analysis revealed inhibited autophagy in PBMCs based on decreased lipidation of LC3II. A differential expression profile of autophagy-modulating genes was observed, and decreased autophagy in PBMCs could be closely associated with chronicity of HBV infection, suggesting a novel strategy for the treatment of patients with chronic HBV infection.
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Affiliation(s)
- Zhen Tian
- Institution of Hepatology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Department of Infectious Diseases, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta Road (w), Xi'an, 710061, Shaanxi, China
| | - Meifang Wang
- Xi'an Jiaotong University City College, Xi'an, Shaanxi, China
| | - Naijuan Yao
- Institution of Hepatology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Department of Infectious Diseases, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta Road (w), Xi'an, 710061, Shaanxi, China
| | - Shujuan Yang
- Department of Infectious Diseases, The Eighth Hospital of Xi'an, Xi'an, Shaanxi, China
| | - Jinfeng Liu
- Institution of Hepatology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Department of Infectious Diseases, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta Road (w), Xi'an, 710061, Shaanxi, China
| | - Yuan Yang
- Institution of Hepatology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Department of Infectious Diseases, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta Road (w), Xi'an, 710061, Shaanxi, China
| | - Tianyan Chen
- Institution of Hepatology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
- Department of Infectious Diseases, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta Road (w), Xi'an, 710061, Shaanxi, China
| | - Yingren Zhao
- Institution of Hepatology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.
- Department of Infectious Diseases, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta Road (w), Xi'an, 710061, Shaanxi, China.
| | - Yingli He
- Institution of Hepatology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.
- Department of Infectious Diseases, The First Affiliated Hospital of Xi'an Jiaotong University, No. 277 Yanta Road (w), Xi'an, 710061, Shaanxi, China.
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