An mRNA SARS-CoV-2 Vaccine Employing Charge-Altering Releasable Transporters with a TLR-9 Agonist Induces Neutralizing Antibodies and T Cell Memory

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Abstract

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  1. SciScore for 10.1101/2021.04.14.439891: (What is this?)

    Please note, not all rigor criteria are appropriate for all manuscripts.

    Table 1: Rigor

    Institutional Review Board StatementConsent: Serum preparation: For human samples, informed consent was obtained from the subjects prior to blood draw.
    Randomizationnot detected.
    Blindingnot detected.
    Power Analysisnot detected.
    Sex as a biological variableMouse vaccination: Eight-to twelve-week-old female BALB/c mice were purchased from The Jackson Laboratory and housed in the Laboratory Animal Facility of the Stanford University Medical Center.
    Cell Line Authenticationnot detected.

    Table 2: Resources

    Antibodies
    SentencesResources
    In some assays, a human anti-RBD (Invivogene) of known antibody concentration was used as standard.
    anti-RBD
    suggested: None
    RBD was then detected using an Alexa Fluor 488 conjugated anti-His antibody (clone J099B1, Biolegend).
    anti-His
    suggested: None
    As positive control a neutralizing human anti-SARS-Cov-2 IgG1 antibody was used (Acro).
    anti-SARS-Cov-2 IgG1
    suggested: None
    Cells were cultured in 96-well plates (Corning, V-bottom) at 1×106 cells/well and stimulated for 48 hours with 5 μg/mL of RBD-His or hCD81-His or media alone (RPMI + 5% FCS) in the presence of anti-mouse CD28 antibody [0,5 µg/ml] (Southern Biotech).
    hCD81-His
    suggested: None
    anti-mouse CD28
    suggested: None
    Following stimulation, cells were washed, stained with Aqua Live/dead viability dye (Thermo Fisher) in PBS, washed two additional times and stained with a cocktail of monoclonal antibodies and Fc block: CD16/32, CD4 BV605 RM4-5, CD8 FITC 53-6.7, CD44 APC IM7, CD69 PE-Cy7 H1.2F3, CD134 BV786 OX-86
    CD44
    suggested: (BD Biosciences Cat# 563736, RRID:AB_2738395)
    CD69
    suggested: (BD Biosciences Cat# 563834, RRID:AB_2738441)
    CD134
    suggested: (BD Biosciences Cat# 744746, RRID:AB_2742454)
    As positive control cells were stimulated with anti-mouse CD3 [0,05 µg/ml] (Southern Biotech) and anti-mouse CD28 antibody [0,5 µg/ml] (Southern Biotech).
    anti-mouse CD3
    suggested: None
    Following stimulation, cells were washed, stained with Aqua Live/dead viability dye (Thermo Fisher) in PBS, washed two additional times and stained with a cocktail of monoclonal antibodies and Fc block: CD16/32, CD4 Ax700 RM4-5, CD8 APC-H7 53-6.7,
    CD4
    suggested: (Miltenyi Biotec Cat# 130-109-536, RRID:AB_2657974)
    Tests were performed in triplicates and with a positive control (anti-CD3 monoclonal antibody (0,05 µg/ml; Southern Biotech)
    anti-CD3
    suggested: None
    After stimulation wells were washed and incubated with a biotinylated anti-IFNγ antibody (R&D systems, mouse IFNγ Kit Cat # EL485) overnight at 4°C.
    anti-IFNγ
    suggested: None
    Experimental Models: Cell Lines
    SentencesResources
    Hela and 293F transfection: Hela cells and 293F cells were plated at 106 cells per well in a 12 well plate in Opti-MEM media (ThermoFisher Scientific).
    293F
    suggested: None
    One day before transfection, 6 x 106 HEK293T cells were seeded in a 10-cm culture plate in RPMI containing 10% FCS, 2mM L-glutamine, streptomycin and penicillin.
    HEK293T
    suggested: None
    For viral neutralization assays, ACE2-expressing HEK293T46 cells were plated in poly-L-lysine-coated, white-walled
    HEK293T46
    suggested: None
    Experimental Models: Organisms/Strains
    SentencesResources
    Mouse vaccination: Eight-to twelve-week-old female BALB/c mice were purchased from The Jackson Laboratory and housed in the Laboratory Animal Facility of the Stanford University Medical Center.
    BALB/c
    suggested: RRID:IMSR_ORNL:BALB/cRl)
    Software and Algorithms
    SentencesResources
    Cells were washed, fixed with 2% formaldehyde and acquired on a BD LSR II and analyzed using Cytobank V7.3.0.
    Cytobank
    suggested: (Cytobank, RRID:SCR_014043)

    Results from OddPub: We did not detect open data. We also did not detect open code. Researchers are encouraged to share open data when possible (see Nature blog).


    Results from LimitationRecognizer: An explicit section about the limitations of the techniques employed in this study was not found. We encourage authors to address study limitations.

    Results from TrialIdentifier: No clinical trial numbers were referenced.


    Results from Barzooka: We did not find any issues relating to the usage of bar graphs.


    Results from JetFighter: Please consider improving the rainbow (“jet”) colormap(s) used on page 3. At least one figure is not accessible to readers with colorblindness and/or is not true to the data, i.e. not perceptually uniform.


    Results from rtransparent:
    • Thank you for including a conflict of interest statement. Authors are encouraged to include this statement when submitting to a journal.
    • Thank you for including a funding statement. Authors are encouraged to include this statement when submitting to a journal.
    • No protocol registration statement was detected.

    About SciScore

    SciScore is an automated tool that is designed to assist expert reviewers by finding and presenting formulaic information scattered throughout a paper in a standard, easy to digest format. SciScore checks for the presence and correctness of RRIDs (research resource identifiers), and for rigor criteria such as sex and investigator blinding. For details on the theoretical underpinning of rigor criteria and the tools shown here, including references cited, please follow this link.