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  1. AU="Mayuni, Grace"
  2. AU="Volkova, Yulia L"
  3. AU="Dauwerse, Sierk"

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  1. Article ; Online: Click Chemistry-Generated Auristatin F-Linker-Benzylguanine for a SNAP-Tag-Based Recombinant Antibody-Drug Conjugate Demonstrating Selective Cytotoxicity toward EGFR-Overexpressing Tumor Cells.

    Huysamen, Allan M / Fadeyi, Olaolu E / Mayuni, Grace / Dogbey, Dennis M / Mungra, Neelakshi / Biteghe, Fleury A N / Hardcastle, Natasha / Ramamurthy, Dharanidharan / Akinrinmade, Olusiji A / Naran, Krupa / Cooper, Susan / Lang, Dirk / Richter, Wolfgang / Hunter, Roger / Barth, Stefan

    ACS omega

    2023  Volume 8, Issue 4, Page(s) 4026–4037

    Abstract: Antibody-drug conjugates (ADCs) are bifunctional molecules combining the targeting potential of monoclonal antibodies with the cancer-killing ability of cytotoxic drugs. This simple yet intelligently designed system directly addresses the lack of ... ...

    Abstract Antibody-drug conjugates (ADCs) are bifunctional molecules combining the targeting potential of monoclonal antibodies with the cancer-killing ability of cytotoxic drugs. This simple yet intelligently designed system directly addresses the lack of specificity encountered with conventional anti-cancer treatment regimes. However, despite their initial success, the generation of clinically sustainable and effective ADCs has been plagued by poor tumor penetration, undefined chemical linkages, unpredictable pharmacokinetic profiles, and heterogeneous mixtures of products. To this end, we generated a SNAP-tag-based fusion protein targeting the epidermal growth factor receptor (EGFR)-a biomarker of aggressive and drug-resistant cancers. Here, we demonstrate the use of a novel click coupling strategy to engineer a benzylguanine (BG)-linker-auristatin F (AuriF) piece that can be covalently tethered to the EGFR-targeting SNAP-tag-based fusion protein in an irreversible 1:1 stoichiometric reaction to form a homogeneous product. Furthermore, using these recombinant ADCs to target EGFR-overexpressing tumor cells, we provide a proof-of-principle for generating biologically active antimitotic therapeutic proteins capable of inducing cell death in a dose-dependent manner, thus alleviating some of the challenges of early ADC development.
    Language English
    Publishing date 2023-01-17
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.2c06844
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Anti-SARS-CoV-2 antibodies elicited by COVID-19 mRNA vaccine exhibit a unique glycosylation pattern.

    Farkash, Inbal / Feferman, Tali / Cohen-Saban, Noy / Avraham, Yahel / Morgenstern, David / Mayuni, Grace / Barth, Natasha / Lustig, Yaniv / Miller, Liron / Shouval, Dror S / Biber, Asaf / Kirgner, Ilya / Levin, Yishai / Dahan, Rony

    Cell reports

    2021  Volume 37, Issue 11, Page(s) 110114

    Abstract: Messenger RNA-based vaccines against COVID-19 induce a robust anti-SARS-CoV-2 antibody response with potent viral neutralization activity. Antibody effector functions are determined by their constant region subclasses and by their glycosylation patterns, ...

    Abstract Messenger RNA-based vaccines against COVID-19 induce a robust anti-SARS-CoV-2 antibody response with potent viral neutralization activity. Antibody effector functions are determined by their constant region subclasses and by their glycosylation patterns, but their role in vaccine efficacy is unclear. Moreover, whether vaccination induces antibodies similar to those in patients with COVID-19 remains unknown. We analyze BNT162b2 vaccine-induced IgG subclass distribution and Fc glycosylation patterns and their potential to drive effector function via Fcγ receptors and complement pathways. We identify unique and dynamic pro-inflammatory Fc compositions that are distinct from those in patients with COVID-19 and convalescents. Vaccine-induced anti-Spike IgG is characterized by distinct Fab- and Fc-mediated functions between different age groups and in comparison to antibodies generated during natural viral infection. These data highlight the heterogeneity of Fc responses to SARS-CoV-2 infection and vaccination and suggest that they support long-lasting protection differently.
    MeSH term(s) Adult ; Aged ; Antibodies, Viral/immunology ; BNT162 Vaccine/immunology ; COVID-19/immunology ; COVID-19 Vaccines/metabolism ; Female ; Glycosylation/drug effects ; Humans ; Immunoglobulin G/immunology ; Immunoglobulin G/metabolism ; Israel/epidemiology ; Male ; Middle Aged ; SARS-CoV-2/immunology ; Spike Glycoprotein, Coronavirus/immunology ; Vaccination/methods ; Vaccine Efficacy ; Vaccines, Synthetic/immunology ; Vaccines, Synthetic/metabolism ; mRNA Vaccines/immunology ; mRNA Vaccines/metabolism
    Chemical Substances Antibodies, Viral ; COVID-19 Vaccines ; Immunoglobulin G ; Spike Glycoprotein, Coronavirus ; Vaccines, Synthetic ; mRNA Vaccines ; BNT162 Vaccine (N38TVC63NU)
    Language English
    Publishing date 2021-11-24
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2021.110114
    Database MEDical Literature Analysis and Retrieval System OnLINE

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