HDL-scavenger receptor B type 1 facilitates SARS-CoV-2 entry

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Abstract

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  1. SciScore for 10.1101/2020.08.13.248872: (What is this?)

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

    Table 1: Rigor

    Institutional Review Board Statementnot detected.
    Randomizationnot detected.
    Blindingnot detected.
    Power Analysisnot detected.
    Sex as a biological variablenot detected.
    Cell Line AuthenticationContamination: All cell lines were previously tested for mycoplasma contamination and incubated in Dulbecco’s modified Eagle’s medium at 37 °C under a humidified atmosphere with 5% CO2.

    Table 2: Resources

    Antibodies
    SentencesResources
    Reagents and antibodies: His-tagged SARS-2-S (S1+S2 ECD; YP_009724390.1;Val16-Pro1213; 40589-V08B1), SARS-2-S1 (YP_009724390.1;Val16-Arg685; 40591-V08H), and SARS-2-S2 (ECD; YP_009724390.1; Ser686-Pro1213; 40591-V08B) proteins were from Sino Biological.
    S1+S2
    suggested: None
    ECD
    suggested: None
    YP_009724390.1;Val16-Pro1213
    suggested: None
    40589-V08B1
    suggested: None
    SARS-2-S1
    suggested: None
    YP_009724390.1;Val16-Arg685
    suggested: None
    40591-V08H
    suggested: None
    SARS-2-S2
    suggested: None
    An antibody against ACE2 for FACS (21115-1-AP; 1:100 dilution) was from Proteintech.
    21115-1-AP
    suggested: (Proteintech Cat# 21115-1-AP, RRID:AB_10732845)
    A PE anti-His antibody (362603, clone J095G46; 1;100 dilution) and an antibody against SR-B1 for FACS (363208, clone m1B9; dilution 1:100) were from Biolegend.
    anti-His
    suggested: (BioLegend Cat# 362603, RRID:AB_2563634)
    SR-B1 for FACS ( 363208
    suggested: None
    The SARS-CoV-2 S1 antibody (40150-R007) for confocal microscopy was from Sino Biological.
    S1
    suggested: None
    Then, anti-rabbit or anti-mouse HRP-conjugated antibodies were applied after 3 washes and the antigen-antibody complexes were visualized using chemilumines cence.
    anti-rabbit
    suggested: None
    anti-mouse HRP-conjugated
    suggested: None
    Flow cytometry for surface SR-B1 or ACE2 expression analysis: Cells were washed with PBS 2 times and incubated with APC-conjugated (APC anti-SR-B1) antibody (1:100) or anti-ACE2 antibody (1:100) followed by a secondary incubation with donkey-anti-rabbit antibody (1:200) conjugated to Alexa Flour 488.
    antibody
    suggested: None
    After incubating at RT for 30 min, the cells were washed two times with PBS containing 2% FBS and then incubated for 30 min at RT with a PE-conjugated antibody (PE anti-His tag).
    anti-His tag) .
    suggested: None
    After blocking in 1% normal goat serum, the sections were incubated with ACE2 or SR-B1 monoclonal antibodies at 4□°C overnight in a humidified chamber, which was followed by an incubation with HRP-labeled goat anti-mouse IgG secondary antibody (Beijing ZSGB Biotechnology, ZDR-5307).
    ACE2
    suggested: None
    SR-B1
    suggested: None
    anti-mouse IgG
    suggested: None
    Subsequently, the sections were incubated with a goat anti-rabbit IgG secondary antibody (HRP) (Beijing ZSGB Biotechnology, PV9001) for 60 min and then visualized with 3,30-diaminobenzidine tetrahydrochloride (DAB).
    anti-rabbit IgG
    suggested: (ZSGB-Bio Cat# PV-9001, RRID:AB_2868452)
    Experimental Models: Cell Lines
    SentencesResources
    , Vero E6 (CRL-1568), MDCK (CCL-34) and Hepa 1-6 (CRL-1830
    Vero E6
    suggested: None
    MDCK
    suggested: None
    Pseudovirus production: All pseudoparticles were generated in 293T cells transfected with the HIV backbone vector pNL4-3.
    293T
    suggested: None
    For chemicals and antibodies, Vero E6 or Huh-7 cells (1.6 ×105 cells/mL) were cultured in a 96-well plate at 37 °C overnight.
    Huh-7
    suggested: None
    For SR-B1 expression, Vero cells (1.6 ×105 cells/mL) were transfected with a plasmid encoding SR-B1, while Huh-7 cells (1.6 ×105 cells/mL) were transfected with siRNA oligos for SR-B1.
    Vero
    suggested: None
    Software and Algorithms
    SentencesResources
    Data were fitted to saturation binding equations using GraphPad Prism 6.
    GraphPad Prism
    suggested: (GraphPad Prism, RRID:SCR_002798)
    Acoustic Focusing cytometer using Flowjo V10.0.7.
    Flowjo
    suggested: (FlowJo, RRID:SCR_008520)
    Statistical methods: In the present study, GraphPad Prism 8.0 was used for statistical calculations and data plotting.
    GraphPad
    suggested: (GraphPad Prism, RRID:SCR_002798)

    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: We did not find any issues relating to colormaps.


    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.

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