Journal: EMBO Reports
Article Title: Tissue‐like environments shape functional interactions of HIV ‐1 with immature dendritic cells
doi: 10.15252/embr.202356818
Figure Lengend Snippet: Representative spinning disc confocal microscopy images of HIV‐1 NLENG R5 Vpr‐mRuby2 particles stained with anti‐HIV‐1 p24 antibody. Vpr‐mRuby2 is shown in red, while p24 is shown in green. Scale bar = 5 μm. Relative infectivity of NLENG‐1 R5 particles in the presence or absence of Vpr‐mRuby2 produced in 293T cells. Particle infectivity was measured by infecting TZM‐bl reporter cells. The number of blue cells present was normalized to the RT activity of the respective virus stock determined by SG‐PERT assay. Bars represent mean ± SD of four technical replicates. Representative spinning disc microscopy images of iDCs cultured in 2D suspension (top) or 3D collagen (bottom) at 48 h. p.i. GAPDH staining is shown in magenta, Vpr‐mRuby particles are shown in red, and GFP expression in productively infected iDCs is shown in green. Scale bar = 20 μm. Imaris quantification workflow. The first left panels show an example of rendered particles created with the spot finder wizard using the signal from mRuby2. The second panels show an example of segmented cells (in green, purple, and violet) obtained through the cell finder wizard using the staining of cytoplasmic GAPDH. Phalloidin‐atto 390 signal, staining F‐actin, was used to find cell surface (represented in glass transparent color) and, finally, distance of each particle with respect to the cell cytoplasm, and surface was calculated. On the top, raw data are shown, while on the bottom, the rendering is shown. The last panel shows an example of cytoplasmic, surface‐associated, and extracellular particles in blue, yellow, and red, respectively. Scale bar = 4 μm. Subcellular localization of Vpr‐mRuby2 particles in iDCs cultured in 2D suspension (left) or 3D collagen (right) for a representative donor, calculated following the workflow described in (D). For each time point, two to four pictures were analyzed and the graphs show mean values ± SD. Source data are available online for this figure.
Article Snippet: The following antibodies for the detection of cell surface markers were used at the indicated dilution: CD86 ANTIBODY, anti‐human, FITC, REAfinityTM (Miltenyi Biotec 130‐116‐262 1:100); CD86 antibody, anti‐human, PerCP‐Vio® 700, REAfinityTM (Miltenyi Biotec 130‐116‐164 1:100); CD80 antibody, anti‐human, PE (Miltenyi Biotec 130‐117‐683 1:100); PE mouse anti‐human CD83 (BD PharmigenTM 556855 1:20); PE/cyanine7 anti‐human CD1a antibody (Biolegend 300121 1:100); CD169 (Siglec‐1) antibody, anti‐human, PerCP‐Vio® 700, REAfinityTM (Miltenyi Biotec 130‐101‐508 1:100); BV421 anti‐human CD169 (Biolegend 346018 1:100); BV421 mouse anti‐human CD206 (BD Pharmigen 564062 1:20); FITC ##man CD209 (DC‐SIGN; BD PharmingenTM 551264 1:100); PerCP/cyanine5.5 anti‐human CD1c antibody (Biolegend 331514 1:50); Brilliant Violet 421TM anti‐human CD141 (Thrombomodulin) antibody (Biolegend 344113 1:50); CD327 (Siglec‐6) Antibody, anti‐human, FITC, REAfinityTM (Miltenyi Biotec 130‐112‐898 1:50); BV605 mouse anti‐human CD11c (Biolegend 301636 1:50); FITC anti‐human CD195 (CCR5) Antibody (Biolegend 359120 1:100); and PerCP/cyanine5.5 anti‐human CD4 Antibody (Biolegend 300530 1:100).
Techniques: Confocal Microscopy, Staining, Infection, Produced, Activity Assay, Virus, Microscopy, Cell Culture, Suspension, Expressing