Apical junctions restrict RNA virus infection of 3-D-cultured HBMEC

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Presentation transcript:

Apical junctions restrict RNA virus infection of 3-D-cultured HBMEC Apical junctions restrict RNA virus infection of 3-D-cultured HBMEC. (A) RT-qPCR for analysis of VSV, DENV, ZIKVC, or ZIKVB infection viral RNA (vRNA) in 2-D, 3-D, or 3-Dtryp cultures of HBMEC. (B) RT-qPCR for DENV or ZIKVC vRNA in 2-D, 3-D, or 3-Dtryp cultures of HBMEC treated with 10 mM EDTA for 1 h prior to infection. Apical junctions restrict RNA virus infection of 3-D-cultured HBMEC. (A) RT-qPCR for analysis of VSV, DENV, ZIKVC, or ZIKVB infection viral RNA (vRNA) in 2-D, 3-D, or 3-Dtryp cultures of HBMEC. (B) RT-qPCR for DENV or ZIKVC vRNA in 2-D, 3-D, or 3-Dtryp cultures of HBMEC treated with 10 mM EDTA for 1 h prior to infection. (C) RT-qPCR for ZIKV vRNA in 2-D, 3-D, or 3-Dtryp cultures of HBMEC that were treated with 100 ng/ml TNF-α for 24 h prior to infection with ZIKVB for an additional 48 h (in the presence of TNF-α). (D) ZIKV infectious titers from mock- or TNF-α-treated 3-D-cultured HBMEC. (E) Confocal micrographs of mock- or TNF-α-treated 3-D cultures of HBMEC stained for actin (green). DAPI-stained nuclei are shown in blue. (F) Schematic for monocyte transmigration assay using ZIKVB-infected monocytes (shown in green), 2-D or 3-Dtryp HBMEC plated in the apical chamber, and primary human astrocytes plated in the basolateral compartment. (G) Quantification (performed in triplicate) of the percentages of ZIKVB-infected or control uninfected monocytes transmigrating from the apical to basolateral chambers across 2-D or two independent 3-Dtryp preparations. (H) Confocal micrographs of CFDA-labeled ZIKVB-infected THP-1 cells (green) 24 h following their addition to the apical chambers of Transwell inserts containing 2-D or 3-Dtryp cultures stained for actin (in red). DAPI-stained nuclei are shown in blue. THP-1 cells that remained in the apical surfaces of 2-D cells are shown with gray arrows, and THP-1 cells in the 3-Dtryp panels that were in the process of transmigrating the endothelial monolayer are shown with white arrows. Images are representative of cells isolated from two independent 3-Dtryp preparations in experiments performed in triplicate. Data in panels A to D and G are shown as means ± standard deviations and are normalized as a percentage of 2-D results (A), mock-treated cells (B and C), or percent input cells (G) (*, P < 0.05; **, P < 0.01; ***, P < 0.001). John C. Bramley et al. mSphere 2017; doi:10.1128/mSphere.00206-17