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5 protocols using ab109110

1

HPV L1 Antibody Neutralization Controls

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The HPV16 L1 antibody H16.V5, HPV18 L1 antibody H18.G10, and HPV31 L1 antibody H31.A6, used as neutralization controls within hrHPV infection studies, were gifts from Neil Christensen (The Pennsylvania State University). For western blot analysis of HPV surface binding the HPV16 L1 mAb CAMVIR-1 (550840, BD Bioscience), β-actin (4970, Cell Signaling Technologies), goat-anti-mouse IRDye 800CW (925-322, LI-COR), and goat-anti-rabbit (H + L) Alexa Fluor 680 (A27042, Thermo Fisher) were used. Immunofluorescent imaging was carried out using the HPV16 L1 antibody 56E.L1 (a kind gift from Martin Sapp, Louisiana State University), early endosomal antigen 1 (EEA-1) (Ab109110, Abcam), rabbit isotype control (02-6102, Thermo Fisher), mouse isotype control (03001D, BD Biosciences), TRITC goat-anti-rabbit (ab6718, Abcam), and DyLight 488 goat anti-mouse (405310, Biolegend).
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2

Intracellular Trafficking of F-AuNSs

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Cells (5000 cells per well) were seeded in 8-well chamber slides (Lab-Tek) and incubated overnight. Cells were then exposed to F-AuNSs (100 μg per mL) at different time points (2, 4, 6, 8, 12, 18, and 24 h), fixed with 4% formaldehyde solution for 10 min, permeabilized with 0.1% Triton X-100 for 1 h, and blocked with 10% normal goat serum solution at room temperature for 1 h. Cells were incubated overnight at 4 °C with anti-EEA1 antibody (Abcam, ab109110, 1/250) for early endosome staining or anti-RAB7 antibody (Abcam, ab126712, 1/50) for late endosome staining, and washed three times followed by staining with Alexa Fluor 594-conjugated anti-rabbit IgG (Abcam, ab150080, 1/500). For lysosome imaging, cells were stained with BioTracker NIR 633 (Sigma, 1/500) according to the manufacturer’s instructions. Slides were mounted with DAPI nuclear dye and visualized under a Leica SP5 X MP confocal microscope. Images were captured utilizing a 63× objective.
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3

Immunofluorescence Staining of Cellular Markers

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Coverslip were incubated for 15 min in PBS with 4% paraformaldehyde, washed with PBS, and incubated in PBS plus 0.5% Triton X‐100 during 10 min. The cells were washed three times with PBS, and the coverslips were incubated during 1 h with primary antibody against ubiquitin (ab134953, Abcam), EEA1 (ab109110, Abcam), M6PR (ab124767, Abcam), and P62/Sqstm1 (ab56416, Abcam). After washing with PBS, the coverslips were incubated with a goat anti‐mouse or anti‐rabbit secondary antibody conjugated with Alexa 488 or CY3 (Interchim SA) for 1 h, washed twice with PBS, and incubated for 3 min in PBS/DAPI (1/10,000 dilution). Coverslips were rinsed twice before mounting in Pro‐Long media (Molecular Probes) and were examined using a Leica microscope.
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4

Immunofluorescence Assay for SARS-CoV-2 Proteins

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Antibodies targeting SARS-CoV-2 nucleocapsid (SinoBiological, #40143-MM05), EEA-1(Abcam, #ab109110), anti-LAMP1 (Abcam, #ab24170,), Rab7 (Origene, #AB0033-200). Goat anti-Mouse IgG (H+L), cross-absorbed secondary antibody, Alexa Fluor 633 (Thermo Scientific # A-21052A-21050), Goat anti-rabbit IgG (H+L), cross-absorbed secondary antibody, Alexa Fluor 488 (Thermo Scientific #A-11008).
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5

Intracellular Trafficking of F-AuNSs

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Cells (5000 cells per well) were seeded in 8-well chamber slides (Lab-Tek) and incubated overnight. Cells were then exposed to F-AuNSs (100 μg per mL) at different time points (2, 4, 6, 8, 12, 18, and 24 h), fixed with 4% formaldehyde solution for 10 min, permeabilized with 0.1% Triton X-100 for 1 h, and blocked with 10% normal goat serum solution at room temperature for 1 h. Cells were incubated overnight at 4 °C with anti-EEA1 antibody (Abcam, ab109110, 1/250) for early endosome staining or anti-RAB7 antibody (Abcam, ab126712, 1/50) for late endosome staining, and washed three times followed by staining with Alexa Fluor 594-conjugated anti-rabbit IgG (Abcam, ab150080, 1/500). For lysosome imaging, cells were stained with BioTracker NIR 633 (Sigma, 1/500) according to the manufacturer’s instructions. Slides were mounted with DAPI nuclear dye and visualized under a Leica SP5 X MP confocal microscope. Images were captured utilizing a 63× objective.
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