LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 95

Search options

  1. Article ; Online: Electron microscopy: The key to resolve RNA viruses replication organelles.

    Stelitano, Debora / Cortese, Mirko

    Molecular microbiology

    2023  Volume 121, Issue 4, Page(s) 679–687

    Abstract: Positive-sense single-stranded RNA viruses significantly reshape intracellular membranes to generate viral replication organelles that form a controlled niche in which nucleic acids, enzymes, and cofactors accumulate to assure an efficient replication of ...

    Abstract Positive-sense single-stranded RNA viruses significantly reshape intracellular membranes to generate viral replication organelles that form a controlled niche in which nucleic acids, enzymes, and cofactors accumulate to assure an efficient replication of the viral genome. In recent years, advancements in electron microscopy (EM) techniques have enabled imaging of these viral factories in a near-native state providing significantly higher molecular details that have led to progress in our general understanding of virus biology. In this review, we describe the contribution of the cutting-edge EM approaches to the current knowledge of replication organelles biogenesis, structure, and functions.
    MeSH term(s) Organelles ; Virus Replication ; RNA Viruses/genetics ; Microscopy, Electron ; RNA, Viral
    Chemical Substances RNA, Viral
    Language English
    Publishing date 2023-09-30
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 619315-8
    ISSN 1365-2958 ; 0950-382X
    ISSN (online) 1365-2958
    ISSN 0950-382X
    DOI 10.1111/mmi.15173
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Membrane architects: how positive-strand RNA viruses restructure the cell.

    Neufeldt, Christopher John / Cortese, Mirko

    The Journal of general virology

    2022  Volume 103, Issue 8

    Abstract: Virus infection is a process that requires combined contributions from both virus and host factors. For this process to be efficient within the crowded host environment, viruses have evolved ways to manipulate and reorganize host structures to produce ... ...

    Abstract Virus infection is a process that requires combined contributions from both virus and host factors. For this process to be efficient within the crowded host environment, viruses have evolved ways to manipulate and reorganize host structures to produce cellular microenvironments. Positive-strand RNA virus replication and assembly occurs in association with cytoplasmic membranes, causing a reorganization of these membranes to create microenvironments that support viral processes. Similarities between virus-induced membrane domains and cellular organelles have led to the description of these structures as virus replication organelles (vRO). Electron microscopy analysis of vROs in positive-strand RNA virus infected cells has revealed surprising morphological similarities between genetically diverse virus species. For all positive-strand RNA viruses, vROs can be categorized into two groups: those that make invaginations into the cellular membranes (In-vRO), and those that cause the production of protrusions from cellular membranes (Pr-vRO), most often in the form of double membrane vesicles (DMVs). In this review, we will discuss the current knowledge on the structure and biogenesis of these two different vRO classes as well as comparing morphology and function of vROs between various positive-strand RNA viruses. Finally, we will discuss recent studies describing pharmaceutical intervention in vRO formation as an avenue to control virus infection.
    MeSH term(s) Cell Membrane ; Hepacivirus/genetics ; Organelles ; Positive-Strand RNA Viruses ; RNA, Viral/genetics ; Virus Replication
    Chemical Substances RNA, Viral
    Language English
    Publishing date 2022-08-17
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 219316-4
    ISSN 1465-2099 ; 0022-1317
    ISSN (online) 1465-2099
    ISSN 0022-1317
    DOI 10.1099/jgv.0.001773
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Exploiting a chink in the armor: engineering broadly neutralizing monoclonal antibodies for SARS-like viruses.

    Cortese, Mirko / Neufeldt, Christopher J

    Signal transduction and targeted therapy

    2021  Volume 6, Issue 1, Page(s) 232

    MeSH term(s) Antibodies, Monoclonal ; Antibodies, Neutralizing ; Neutralization Tests ; Viruses
    Chemical Substances Antibodies, Monoclonal ; Antibodies, Neutralizing
    Language English
    Publishing date 2021-06-11
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 2886872-9
    ISSN 2059-3635 ; 2095-9907
    ISSN (online) 2059-3635
    ISSN 2095-9907
    DOI 10.1038/s41392-021-00661-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Exploiting a chink in the armor

    Mirko Cortese / Christopher J. Neufeldt

    Signal Transduction and Targeted Therapy, Vol 6, Iss 1, Pp 1-

    engineering broadly neutralizing monoclonal antibodies for SARS-like viruses

    2021  Volume 2

    Keywords Medicine ; R ; Biology (General) ; QH301-705.5
    Language English
    Publishing date 2021-06-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  5. Article ; Online: Advanced microscopy technologies enable rapid response to SARS-CoV-2 pandemic.

    Cortese, Mirko / Laketa, Vibor

    Cellular microbiology

    2021  Volume 23, Issue 7, Page(s) e13319

    Abstract: The ongoing SARS-CoV-2 pandemic with over 80 million infections and more than a million deaths worldwide represents the worst global health crisis of the 21th century. Beyond the health crisis, the disruptions caused by the COVID-19 pandemic have serious ...

    Abstract The ongoing SARS-CoV-2 pandemic with over 80 million infections and more than a million deaths worldwide represents the worst global health crisis of the 21th century. Beyond the health crisis, the disruptions caused by the COVID-19 pandemic have serious global socio-economic consequences. It has also placed a significant pressure on the scientific community to understand the virus and its pathophysiology and rapidly provide anti-viral treatments and procedures in order to help the society and stop the virus spread. Here, we outline how advanced microscopy technologies such as high-throughput microscopy and electron microscopy played a major role in rapid response against SARS-CoV-2. General applicability of developed microscopy technologies makes them uniquely positioned to act as the first line of defence against any emerging infection in the future.
    MeSH term(s) Antibodies, Viral/blood ; Antiviral Agents/pharmacology ; COVID-19/diagnosis ; COVID-19/drug therapy ; COVID-19/pathology ; COVID-19/virology ; COVID-19 Serological Testing ; COVID-19 Vaccines ; Cryoelectron Microscopy ; Drug Development ; High-Throughput Screening Assays ; Humans ; Microscopy/methods ; Microscopy, Electron ; Pandemics ; SARS-CoV-2/drug effects ; SARS-CoV-2/immunology ; SARS-CoV-2/physiology ; SARS-CoV-2/ultrastructure ; Virus Replication
    Chemical Substances Antibodies, Viral ; Antiviral Agents ; COVID-19 Vaccines
    Language English
    Publishing date 2021-03-01
    Publishing country India
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1468320-9
    ISSN 1462-5822 ; 1462-5814
    ISSN (online) 1462-5822
    ISSN 1462-5814
    DOI 10.1111/cmi.13319
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Human immunoglobulins are transported to HCMV viral envelope by viral Fc gamma receptors-dependent and independent mechanisms.

    Vezzani, Giacomo / Pimazzoni, Silvia / Ferranti, Rossella / Calò, Stefano / Monda, Giuseppina / Amendola, Diego / Frigimelica, Elisabetta / Maione, Domenico / Cortese, Mirko / Merola, Marcello

    Frontiers in microbiology

    2023  Volume 13, Page(s) 1106401

    Abstract: Human cytomegaloviruses (HCMVs) employ many different mechanisms to escape and subvert the host immune system, including expression of the viral IgG Fcγ receptors (vFcγRs) ...

    Abstract Human cytomegaloviruses (HCMVs) employ many different mechanisms to escape and subvert the host immune system, including expression of the viral IgG Fcγ receptors (vFcγRs)
    Language English
    Publishing date 2023-01-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2022.1106401
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Identification of host dependency factors involved in SARS-CoV-2 replication organelle formation through proteomics and ultrastructural analysis.

    Pahmeier, Felix / Lavacca, Teresa-Maria / Goellner, Sarah / Neufeldt, Christopher J / Prasad, Vibhu / Cerikan, Berati / Rajasekharan, Sreejith / Mizzon, Giulia / Haselmann, Uta / Funaya, Charlotta / Scaturro, Pietro / Cortese, Mirko / Bartenschlager, Ralf

    Journal of virology

    2023  Volume 97, Issue 11, Page(s) e0087823

    Abstract: Importance: Remodeling of the cellular endomembrane system by viruses allows for efficient and coordinated replication of the viral genome in distinct subcellular compartments termed replication organelles. As a critical step in the viral life cycle, ... ...

    Abstract Importance: Remodeling of the cellular endomembrane system by viruses allows for efficient and coordinated replication of the viral genome in distinct subcellular compartments termed replication organelles. As a critical step in the viral life cycle, replication organelle formation is an attractive target for therapeutic intervention, but factors central to this process are only partially understood. In this study, we corroborate that two viral proteins, nsp3 and nsp4, are the major drivers of membrane remodeling in SARS-CoV-2 infection. We further report a number of host cell factors interacting with these viral proteins and supporting the viral replication cycle, some of them by contributing to the formation of the SARS-CoV-2 replication organelle.
    MeSH term(s) Humans ; COVID-19 ; Organelles/metabolism ; Proteomics ; SARS-CoV-2/physiology ; Viral Nonstructural Proteins/genetics ; Viral Nonstructural Proteins/metabolism ; Virus Replication
    Chemical Substances Viral Nonstructural Proteins
    Language English
    Publishing date 2023-10-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80174-4
    ISSN 1098-5514 ; 0022-538X
    ISSN (online) 1098-5514
    ISSN 0022-538X
    DOI 10.1128/jvi.00878-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: N-Phenylpyridine-3-Carboxamide and 6-Acetyl-1H-Indazole Inhibit the RNA Replication Step of the Dengue Virus Life Cycle.

    Sow, Aïssatou Aïcha / Pahmeier, Felix / Ayotte, Yann / Anton, Anaïs / Mazeaud, Clément / Charpentier, Tania / Angelo, Léna / Woo, Simon / Cerikan, Berati / Falzarano, Darryl / Abrahamyan, Levon / Lamarre, Alain / Labonté, Patrick / Cortese, Mirko / Bartenschlager, Ralf / LaPlante, Steven R / Chatel-Chaix, Laurent

    Antimicrobial agents and chemotherapy

    2023  Volume 67, Issue 2, Page(s) e0133122

    Abstract: Dengue virus (DENV) is ... ...

    Abstract Dengue virus (DENV) is a
    MeSH term(s) Animals ; Humans ; Antiviral Agents/pharmacology ; Antiviral Agents/therapeutic use ; Dengue/drug therapy ; Dengue Virus/genetics ; Flavivirus ; Life Cycle Stages ; RNA Replication ; RNA, Viral/genetics ; Virus Replication ; Zika Virus/genetics ; Zika Virus Infection ; Subgenomic RNA/genetics
    Chemical Substances Antiviral Agents ; RNA, Viral ; Subgenomic RNA
    Language English
    Publishing date 2023-01-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 217602-6
    ISSN 1098-6596 ; 0066-4804
    ISSN (online) 1098-6596
    ISSN 0066-4804
    DOI 10.1128/aac.01331-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Replication-Independent Generation and Morphological Analysis of Flavivirus Replication Organelles.

    Goellner, Sarah / Cerikan, Berati / Cortese, Mirko / Neufeldt, Christopher J / Haselmann, Uta / Bartenschlager, Ralf

    STAR protocols

    2020  Volume 1, Issue 3, Page(s) 100173

    Abstract: Positive-strand RNA viruses replicate in distinct membranous structures called replication organelles (ROs). Mechanistic studies of RO formation have been difficult because perturbations affecting viral replication have an impact on viral protein amounts, ...

    Abstract Positive-strand RNA viruses replicate in distinct membranous structures called replication organelles (ROs). Mechanistic studies of RO formation have been difficult because perturbations affecting viral replication have an impact on viral protein amounts, thus affecting RO biogenesis. Here, we present a detailed guide on how to use a replication-independent expression system, designated pIRO (plasmid-induced replication organelle formation), inducing bona fide flavivirus ROs in transfected cells. This will be useful for mechanistic studies of viral and cellular factors driving flavivirus RO biogenesis. For complete details on the use and execution of this protocol, please refer to Cerikan et al. (2020).
    MeSH term(s) Cell Line, Tumor ; Cytological Techniques/methods ; Flavivirus/physiology ; Flavivirus/ultrastructure ; Humans ; Organelles/ultrastructure ; Specimen Handling ; Virus Replication/physiology
    Language English
    Publishing date 2020-11-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2666-1667
    ISSN (online) 2666-1667
    DOI 10.1016/j.xpro.2020.100173
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Inactivation of the Niemann Pick C1 cholesterol transporter 1 (NPC1) restricts SARS-CoV-2 infection

    La Rosa, Piergiorgio / Tiberi, Jessica / Palermo, Enrico / Tiano, Sofia / Cortese, Mirko / Hiscott, John / Fiorenza, Maria Teresa

    bioRxiv

    Abstract: The Niemann Pick C1 (NPC1) protein is an intracellular cholesterol transporter located in the late endosome/lysosome (LE/Ly) and is involved in cholesterol mobilization. Loss-of-function mutations of the NPC1 gene lead to accumulation of cholesterol and ... ...

    Abstract The Niemann Pick C1 (NPC1) protein is an intracellular cholesterol transporter located in the late endosome/lysosome (LE/Ly) and is involved in cholesterol mobilization. Loss-of-function mutations of the NPC1 gene lead to accumulation of cholesterol and sphingolipids in LE/Ly, resulting in severe fatal NPC1 disease. Cellular alterations associated with NPC1 inactivation affect both the integrity of lipid rafts and the endocytic pathway. Because the angiotensin-converting enzyme 2 (ACE2) and type 2 serine transmembrane protease (TMPRSS2) of the SARS-CoV-2 Spike (S) protein also localize to lipid rafts, we sought to investigate the hypothesis that NPC1 inactivation would generate an intrinsically unfavorable barrier to SARS-CoV-2 entry. In this study, we demonstrate that NPC1 pharmacological inactivation or CRISP/R-Cas mediated ablation of NPC1 dramatically reduced SARS-CoV-2 infectivity. More specifically, our findings demonstrate that pharmacological inactivation of NPC1 results in massive accumulation of ACE2 in the autophagosomal/lysosomal compartment. A >40-fold decrease in virus titer indicates that this effectively prevents VSV-Spike-GFP infection by impeding virus binding and entry. A similarly marked decrease in viral infectivity is observed in cells that had NPC1 expression genetically abrogated. These observations were further confirmed in a de novo SARS-CoV-2 infection paradigm, where cells were infected with the naturally pathogenic SARS-CoV-2. Overall, this work offers strong evidence that NPC1 function is essential for successful SARS-CoV-2 infection, thus implicating NPC1 as a potential therapeutic target in COVID-19 management.
    Keywords covid19
    Language English
    Publishing date 2023-12-14
    Publisher Cold Spring Harbor Laboratory
    Document type Article ; Online
    DOI 10.1101/2023.12.13.571570
    Database COVID19

    Kategorien

To top