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Maity S, Saha A. Therapeutic Potential of Exploiting Autophagy Cascade Against Coronavirus Infection. Front Microbiol 2021; 12:675419. [PMID: 34054782 PMCID: PMC8160449 DOI: 10.3389/fmicb.2021.675419] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 04/20/2021] [Indexed: 12/12/2022] Open
Abstract
Since its emergence in December 2019 in Wuhan, China, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) created a worldwide pandemic of coronavirus disease (COVID-19) with nearly 136 million cases and approximately 3 million deaths. Recent studies indicate that like other coronaviruses, SARS-CoV-2 also hijacks or usurps various host cell machineries including autophagy for its replication and disease pathogenesis. Double membrane vesicles generated during initiation of autophagy cascade act as a scaffold for the assembly of viral replication complexes and facilitate RNA synthesis. The use of autophagy inhibitors - chloroquine and hydroxychloroquine initially appeared to be as a potential treatment strategy of COVID-19 patients but later remained at the center of debate due to high cytotoxic effects. In the absence of a specific drug or vaccine, there is an urgent need for a safe, potent as well as affordable drug to control the disease spread. Given the intricate connection between autophagy machinery and viral pathogenesis, the question arises whether targeting autophagy pathway might show a path to fight against SARS-CoV-2 infection. In this review we will discuss about our current knowledge linking autophagy to coronaviruses and how that is being utilized to repurpose autophagy modulators as potential COVID-19 treatment.
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Affiliation(s)
| | - Abhik Saha
- School of Biotechnology, Presidency University, Kolkata, India
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2
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Analysis of influenza virus-induced perturbation in autophagic flux and its modulation during Vitamin D3 mediated anti-apoptotic signaling. Virus Res 2020; 282:197936. [PMID: 32234325 DOI: 10.1016/j.virusres.2020.197936] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 02/17/2020] [Accepted: 03/13/2020] [Indexed: 12/21/2022]
Abstract
Vitamin D3/Calcitriol supplementation in humans is associated with reduced incidence and severity during influenza A virus (IAV) infection. Apoptosis in response to IAV infection is a major contributor to host cell death and tissue damage; however, its modulation by Vitamin D3 remains unclear. In this study, we demonstrate the efficacy of Vitamin D3 in preventing apoptosis induction by pandemic influenza A (H1N1)pdm09 virus in human alveolar cells (A549). Human alveolar epithelial cell line A549 was used to assess the cytotoxic effects of IAV infection. Immunoblotting and fluorescence microscopy were used to study apoptosis and autophagy. The results of the present study demonstrate that IAV induces apoptosis by subversion of host autophagy via down-regulating components of autophagic machinery involved in autophagosome-lysosome fusion and lysosomal activity. Vitamin D3 restores the autophagic flux inhibited by IAV by upregulating the expression of Syntaxin-17 (STX17) and V-type proton ATPase subunit (ATP6V0A2) thereby causing a concomitant decrease in cellular apoptosis via a Vitamin D3 receptor (VDR) dependent mechanism. The present study suggests that Vitamin D3 is a potentially useful agent for limiting IAV-induced cellular injury via its pro-autophagic action.
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Pan Z, Chen Y, Liu J, Jiang Q, Yang S, Guo L, He G. Design, synthesis, and biological evaluation of polo-like kinase 1/eukaryotic elongation factor 2 kinase (PLK1/EEF2K) dual inhibitors for regulating breast cancer cells apoptosis and autophagy. Eur J Med Chem 2018; 144:517-528. [PMID: 29288948 DOI: 10.1016/j.ejmech.2017.12.046] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 12/06/2017] [Accepted: 12/13/2017] [Indexed: 01/09/2023]
Abstract
Both PLK1 and EEF2K are serine⁄threonine kinases that play important roles in the proliferation and programmed cell death of various types of cancer. They are highly expressed in breast cancer tissues. Based on the multiple-complexes generated pharmacophore models of PLK1 and homology models of EEF2K, the integrated virtual screening is performed to discover novel PLK1/EEF2K dual inhibitors. The top ten hit compounds are selected and tested in vitro, and five of them display PLK1 and EEF2K inhibition in vitro. Based on the docking modes of the most potent hit compound, a series of derivatives are synthesized, characterized and biological assayed on the PLK1, EEF2K as well as breast cancer cell proliferation models. Compound 18i with satisfied inhibitory potency are shifted to molecular mechanism studies contained molecular dynamics simulations, cell cycles, apoptosis and autophagy assays. Our results suggested that these novel PLK1/EEF2K dual inhibitors can be used as lead compounds for further development breast cancer chemotherapy.
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Affiliation(s)
- Zhaoping Pan
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China; State Key Laboratory of Biotherapy and Department of Breast Surgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Yujuan Chen
- State Key Laboratory of Biotherapy and Department of Breast Surgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Jingyan Liu
- State Key Laboratory of Biotherapy and Department of Breast Surgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Qinglin Jiang
- State Key Laboratory of Biotherapy and Department of Breast Surgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; School of Pharmacy and Sichuan Province College Key Laboratory of Structure-Specific Small Molecule Drugs, Chengdu Medical College, Chengdu 610500, China.
| | - Shengyong Yang
- State Key Laboratory of Biotherapy and Department of Breast Surgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Li Guo
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China.
| | - Gu He
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China; State Key Laboratory of Biotherapy and Department of Breast Surgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
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Zhang S, Zhang C, Tang S, Deng S, Zhou Y, Dai C, Yang X, Xiao X. AKT/TSC2/p70S6K signaling pathway is involved in quinocetone-induced death-promoting autophagy in HepG2 cells. Toxicol Mech Methods 2016; 26:301-10. [DOI: 10.3109/15376516.2016.1172690] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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5
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Ortega-Villaizan M, Chico V, Martinez-Lopez A, Garcia-Valtanen P, Coll JM, Estepa A. Development of new therapeutical/adjuvant molecules by pepscan mapping of autophagy and IFN inducing determinants of rhabdoviral G proteins. Mol Immunol 2016; 70:118-24. [PMID: 26759988 DOI: 10.1016/j.molimm.2015.10.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 10/13/2015] [Accepted: 10/13/2015] [Indexed: 01/11/2023]
Abstract
Surface glycoproteins of enveloped virus are potent elicitors of both innate and adaptive host immune responses. Therefore, the identification of viral glycoprotein determinants directly implicated in the induction of these responses might be of special interest for designing new therapeutical/adjuvant molecules. In this work we review the contribution of the "pepscan" approach to the screening of viral functions in the sequence of glycoprotein G (gpG) of the fish rhabdovirus of viral hemorrhagic septicemia (VHSV). Among others, by scanning gpG peptides, it has been possible to identify and validate minimal determinants for gpG directly implicated in initiating the fish type I Interferon-associated immune responses as well as in the antiviral autophagy program. Further fine-tunning of the identified peptides in the gpG of VHSV has allowed designing novel adjuvants that decrease DNA vaccine requirements and identify possible innovative antiviral molecules. In addition, these results have also contributed to improve our knowledge on how to stimulate the fish immune system.
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Affiliation(s)
| | - V Chico
- IBMC, Miguel Hernandez University, 03202 Elche, Spain
| | | | | | - J M Coll
- INIA-SIGT-Biotechnology, 28040 Madrid, Spain.
| | - A Estepa
- IBMC, Miguel Hernandez University, 03202 Elche, Spain.
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6
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Bellizzi A, White MK, Wollebo HS. Degradation of polyomavirus JC T-antigen by stress involves the LIP isoform of C/EBP. Cell Cycle 2015; 14:2075-9. [PMID: 26017382 DOI: 10.1080/15384101.2015.1042631] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Endoplasmic reticulum (ER) stress is caused by the accumulation of misfolded or unfolded proteins in the lumen of the endoplasmic reticulum. CCAAT/enhancer binding proteins are one of the cellular proteins whose expression is upregulated during ER stress. Previously, we have identified C/EBPbeta isoforms, especially LIP, as a negative regulator of polyomavirus JC (JCV), the causative agent of the demyelinating disease progressive multifocal leukoencephalopathy (PML). Here, we show that the induction of ER stress by thapsigargin increase the expression of endogenous LIP and the degradation of JCV T-antigen in a JCV-transgenic mouse tumor cell line. Our results also revealed that overexpression of LIP significantly reduced the level of T-Ag and this effect is reversed upon siRNA-mediated silencing of LIP. Immunoprecipitation/Western blot experiments indicated that LIP interacts with T-antigen directly. Treatment of cells that overexpress LIP with MG115, a proteasome inhibitor, partially rescued LIP-mediated degradation of T-antigen. Our observations point to a role of LIP in ER stress regulation of T-antigen stability and may open a new avenue to study host-virus interaction during ER stress.
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Affiliation(s)
- Anna Bellizzi
- a Department of Neuroscience; Center for Neurovirology; Temple University School of Medicine ; Philadelphia , PA USA
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García-Valtanen P, Ortega-Villaizán MDM, Martínez-López A, Medina-Gali R, Pérez L, Mackenzie S, Figueras A, Coll JM, Estepa A. Autophagy-inducing peptides from mammalian VSV and fish VHSV rhabdoviral G glycoproteins (G) as models for the development of new therapeutic molecules. Autophagy 2014; 10:1666-80. [PMID: 25046110 PMCID: PMC4206542 DOI: 10.4161/auto.29557] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
It has not been elucidated whether or not autophagy is induced by rhabdoviral G glycoproteins (G) in vertebrate organisms for which rhabdovirus infection is lethal. Our work provides the first evidence that both mammalian (vesicular stomatitis virus, VSV) and fish (viral hemorrhagic septicemia virus, VHSV, and spring viremia carp virus, SVCV) rhabdoviral Gs induce an autophagic antiviral program in vertebrate cell lines. The transcriptomic profiles obtained from zebrafish genetically immunized with either Gsvcv or Gvhsv suggest that autophagy is induced shortly after immunization and therefore, it may be an important component of the strong antiviral immune responses elicited by these viral proteins. Pepscan mapping of autophagy-inducing linear determinants of Gvhsv and Gvsv showed that peptides located in their fusion domains induce autophagy. Altogether these results suggest that strategies aimed at modulating autophagy could be used for the prevention and treatment of rhabdoviral infections such as rabies, which causes thousands of human deaths every year.
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Affiliation(s)
| | | | | | | | - Luis Pérez
- IBMC; Miguel Hernández University; Elche, Spain
| | - Simon Mackenzie
- Institute of Aquaculture; University of Stirling; Stirling, UK
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Bouley SJ, Maginnis MS, Derdowski A, Gee GV, O'Hara BA, Nelson CD, Bara AM, Atwood WJ, Dugan AS. Host cell autophagy promotes BK virus infection. Virology 2014; 456-457:87-95. [PMID: 24889228 PMCID: PMC7112032 DOI: 10.1016/j.virol.2014.03.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 11/27/2013] [Accepted: 03/10/2014] [Indexed: 12/16/2022]
Abstract
Autophagy is important for a variety for virus life cycles. We sought to determine the role of autophagy in human BK polyomavirus (BKPyV) infection. The addition excess amino acids during viral infection reduced BKPyV infection. Perturbing autophagy levels using inhibitors, 3-MA, bafilomycin A1, and spautin-1, also reduced infection, while rapamycin treatment of host cells increased infection. siRNA knockdown of autophagy genes, ATG7 and Beclin-1, corresponded to a decrease in BKPyV infection. BKPyV infection not only correlated with autophagosome formation, but also virus particles localized to autophagy-specific compartments early in infection. These data support a novel role for autophagy in the promotion of BKPyV infection. Amino acid supplementation decreases BKPyV infection. Autophagy inhibitors, 3-MA, bafilomycin A, and spautin-1, decrease BKPyV infection, while rapamycin increases infection. Inhibitors are most effective when added early in viral life cycle. Knockdown of autophagy genes, Beclin-1 and ATG7, in host cells decreases BKPyV infection levels. BKPyV localizes to LC3+ autophagosome 3 h post infection.
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Affiliation(s)
- Stephanie J Bouley
- Department of Natural Sciences, Assumption College, Worcester, MA 01609, United States
| | - Melissa S Maginnis
- Department of Molecular Biology, Cell Biology & Biochemistry, Brown University, Providence, RI 02912, United States
| | - Aaron Derdowski
- Department of Molecular Biology, Cell Biology & Biochemistry, Brown University, Providence, RI 02912, United States
| | - Gretchen V Gee
- Department of Molecular Biology, Cell Biology & Biochemistry, Brown University, Providence, RI 02912, United States
| | - Bethany A O'Hara
- Department of Molecular Biology, Cell Biology & Biochemistry, Brown University, Providence, RI 02912, United States
| | - Christian D Nelson
- Department of Molecular Biology, Cell Biology & Biochemistry, Brown University, Providence, RI 02912, United States
| | - Anne M Bara
- Department of Natural Sciences, Assumption College, Worcester, MA 01609, United States
| | - Walter J Atwood
- Department of Molecular Biology, Cell Biology & Biochemistry, Brown University, Providence, RI 02912, United States
| | - Aisling S Dugan
- Department of Natural Sciences, Assumption College, Worcester, MA 01609, United States.
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San‐Miguel B, Crespo I, Vallejo D, Álvarez M, Prieto J, González‐Gallego J, Tuñón MJ. Melatonin modulates the autophagic response in acute liver failure induced by the rabbit hemorrhagic disease virus. J Pineal Res 2014; 56:313-21. [PMID: 24499270 PMCID: PMC7166588 DOI: 10.1111/jpi.12124] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 01/31/2014] [Indexed: 12/29/2022]
Abstract
Autophagy is an important survival pathway and participates in the host response to infection. Beneficial effects of melatonin have been previously reported in an animal model of acute liver failure (ALF) induced by the rabbit hemorrhagic disease virus (RHDV). This study was aimed to investigate whether melatonin protection against liver injury induced by the RHDV associates to modulation of autophagy. Rabbits were infected with 2 × 10(4) hemagglutination units of a RHDV isolate and received 20 mg/kg melatonin at 0, 12, and 24 hr postinfection. RHDV induced autophagy, with increased expression of beclin-1, ubiquitin-like autophagy-related (Atg)5, Atg12, Atg16L1 and sequestrosome 1 (p62/SQSTM1), protein 1 light chain 3 (LC3) staining, and conversion of LC3-I to autophagosome-associated LC3-II. These effects reached a maximum at 24 hr postinfection, in parallel to extensive colocalization of LC3 and lysosome-associated membrane protein (LAMP)-1. The autophagic response induced by RHDV infection was significantly inhibited by melatonin administration. Melatonin treatment also resulted in decreased immunoreactivity for RHDV viral VP60 antigen and a significantly reduction in RHDV VP60 mRNA levels, oxidized to reduced glutathione ratio (GSSG/GSH), caspase-3 activity, and immunoglobulin-heavy-chain-binding protein (BiP) and CCAAT/enhancer-binding protein homologous protein (CHOP) expression. Results indicate that, in addition to its antioxidant and antiapoptotic effects, and the suppression of ER stress, melatonin induces a decrease in autophagy associated with RHDV infection and inhibits RHDV RNA replication. Results obtained reveal novel molecular pathways accounting for the protective effect of melatonin in this animal model of ALF.
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Affiliation(s)
| | - Irene Crespo
- Institute of Biomedicine (IBIOMED)University of LeónLeónSpain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd)Spain
| | - Daniela Vallejo
- Institute of Biomedicine (IBIOMED)University of LeónLeónSpain
| | | | - Jesús Prieto
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd)Spain
- Division of Hepatology and Gene TherapyCenter for Applied Medical Research (CIMA)University of NavarraPamplonaSpain
| | - Javier González‐Gallego
- Institute of Biomedicine (IBIOMED)University of LeónLeónSpain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd)Spain
| | - María J. Tuñón
- Institute of Biomedicine (IBIOMED)University of LeónLeónSpain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd)Spain
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Vallejo D, Crespo I, San-Miguel B, Alvarez M, Prieto J, Tuñón MJ, González-Gallego J. Autophagic response in the Rabbit Hemorrhagic Disease, an animal model of virally-induced fulminant hepatic failure. Vet Res 2014; 45:15. [PMID: 24490870 PMCID: PMC3922607 DOI: 10.1186/1297-9716-45-15] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 01/22/2014] [Indexed: 01/05/2023] Open
Abstract
The Rabbit Hemorrhagic Disease Virus (RHDV) induces a severe disease that fulfils many requirements of an animal model of fulminant hepatic failure. However, a better knowledge of molecular mechanisms contributing to liver damage is required, and it is unknown whether the RHDV induces liver autophagy and how it relates to apoptosis. In this study, we attempted to explore which signalling pathways were involved in the autophagic response induced by the RHDV and to characterize their role in the context of RHDV pathogenesis. Rabbits were infected with 2 × 10⁴ hemmaglutination units of a RHDV isolate. The autophagic response was measured as presence of autophagic vesicles, LC3 staining, conversion of LC3-I to autophagosome-associated LC3-II and changes in expression of beclin-1, UVRAG, Atg5, Atg12, Atg16L1 and p62/SQSTM1. RHDV-triggered autophagy reached a maximum at 24 hours post-infection (hpi) and declined at 30 and 36 hpi. Phosphorylation of mTOR also augmented in early periods of infection and there was an increase in the expression of the endoplasmic reticulum chaperones BiP/GRP78, CHOP and GRP94. Apoptosis, measured as caspase-3 activity and expression of PARP-1, increased significantly at 30 and 36 hpi in parallel to the maximal expression of the RHDV capsid protein VP60. These data indicate that RHDV infection initiates a rapid autophagic response, perhaps in an attempt to protect liver, which associates to ER stress development and is independent from downregulation of the major autophagy suppressor mTOR. As the infection continues and the autophagic response declines, cells begin to exhibit apoptosis.
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Affiliation(s)
| | | | | | | | | | - María Jesús Tuñón
- Institute of Biomedicine (IBIOMED), University of León, 24071 León, Spain.
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