Journal: PLOS One

Article Title: Inducible immortalized Dendritic Cells enable antigen-specific antibody production in a murine in vitro Immunization model

doi: 10.1371/journal.pone.0339883

Figure Lengend Snippet: (A) Microscopic images from immature BM-DCs isolated from a CB57Bl/6 mouse (left panel), iniDCs after 7 days stimulation with Dex/Dox (middle panel), and de-iniDCs after 3 days of deinduction (right panel). Upon deinduction, de-iniDCs display an adherent phenotype as well as typical dendritic extensions indicated by arrows. During their immortal period, iniDCs lose typical dendritic morphology, become round-shaped, and pass over in suspension. (10 x magnification, bar = 50 µm) (B) Respectively, 5 x 10 5 BM-DCs, iniDCs, and de-iniDCs were stained with fluorochrome-conjugated antibodies against specific dendritic surface markers CD11c, MHC II, CD40, and CD86 and analyzed by flow cytometry. Dead cells were removed by PO-PRO TM -1 Iodide staining. Experiments were performed 3 times independently. Given is the result of one representative experiment. (C) Displayed are the geometric means (MFI) of the cell surface markers, with the background signal subtracted. dark grey = BM-DCs, white = iniDCs, light grey = de-iniDCs, (n = 6), two-tailed t-test (p < 0,05 = *; p < 0,01 = **; p < 0,001 = ***).

Article Snippet: : 8184649), rat anti-mouse-MHC II IgG antibody (Miltenyi Biotec, Bergisch Gladbach, Germany, Ref.: 130-102-186) or fluorescein isothiocyanate (FITC) labeled rat anti-mouse-CD86 IgG antibody (Miltenyi Biotec, Bergisch Gladbach, Germany, Ref.: 130-102-506, Lot.

Techniques: Isolation, Suspension, Staining, Flow Cytometry, Two Tailed Test

Journal: PLOS One

Article Title: Inducible immortalized Dendritic Cells enable antigen-specific antibody production in a murine in vitro Immunization model

doi: 10.1371/journal.pone.0339883

Figure Lengend Snippet: (A) 5 x 10 5 de-iniDCs were stimulated with or without 2 µg/ml DQ-Ova for 60 min at 37°C and measured by fluorescence microscopy using the BZ-800 Biozero (10 x magnification, bar = 50 µm), (B) 1 x 10 5 C57Bl/6 BM-DCs and de-iniDCs were challenged with 1 µg/ml DQ-Ova for 60 min at 37°C (black) and analyzed by flow cytometry using the Attune ® Acoustic Focusing Cytometer. Controls are depicted in grey. Given is the result of one representative experiment out of three. (C) After maturation of the de-iniDCs with VP1, respectively 5 x 10 5 cells were stained with fluorochrome-labeled antibodies against maturation markers CD11c, MHC II, CD40, or CD86. To exclude dead cells 1 µg/ml PO-PRO-1 TM Iodide was added before analysis using the Attune® Acoustic Focusing Cytometer. Unstained control is in light grey, immature DCs in dark grey, and mature DCs are in black. Given is one representative result out of three. (D) Displayed are the geometric means (MFI) of the different surface receptors before and after maturation with VP1. The background signal was subtracted. (n = 8), two-tailed t-test (p < 0,05 = *; p < 0,01 = **; p < 0,001 = ***) (E) 1x10 6 de-iniDCs were matured with 15 µg/ml VP1 for 24 h, and supernatant was analyzed for IL-10 and IL-12p70 by ELISA. (n = 3).

Article Snippet: : 8184649), rat anti-mouse-MHC II IgG antibody (Miltenyi Biotec, Bergisch Gladbach, Germany, Ref.: 130-102-186) or fluorescein isothiocyanate (FITC) labeled rat anti-mouse-CD86 IgG antibody (Miltenyi Biotec, Bergisch Gladbach, Germany, Ref.: 130-102-506, Lot.

Techniques: Fluorescence, Microscopy, Flow Cytometry, Cytometry, Staining, Labeling, Control, Two Tailed Test, Enzyme-linked Immunosorbent Assay

Journal: bioRxiv

Article Title: Cytokine-bearing Bacterial Outer Membrane Vesicles with Empowered Efficacy in Intratumoral Immunotherapy

doi: 10.64898/2026.04.02.716109

Figure Lengend Snippet: Representative image of H&E staining MPO immunohistochemistry on FFPE sections of the same tumors described in . CT26 tumors were collected 24 hours after a three intratumoral injections of PBS (50 µL) ( A ) or IL-2-OMVs Δ60 + TNFα-OMVs Δ60 (10 µg in 50 µL PBS) ( B ).( C - D - E ) Flow cytometry analysis of tumors – BALB/c mice were challenged with CT26 and when tumors reached a size of approximately 100 mm 3 mice were treated with one or three doses (two days apart) of the following formulations: PBS (control), 1 μg of OMVs Δ60 , 1 μg of CCL3-OMVs Δ60 , 1 μg of Flt3L-OMVs Δ60 . The day after the treatments, two tumors from each group receiving one dose (Post I) and three tumors from each group receiving three doses (Post III) were surgically removed. Tumor cells (1 x 10 6 ) were incubated with the appropriate fluorescent labelled antibodies and subsequently an alyzed by flow cytometry. Frequencies of regulatory T cells ( C ) γδ T cells ( D ) and LY6C/G + CD11b + myeloid cells ( E ) are calculated within the live, non-aggregated total cell populations. The dotted areas within the bars of panel D indicate the percentage of MHC II-positive γδ T cells. In panel E , each bar is subdivided into three portions of different color intensity. The dark tone represents the fraction of LY6C/G HIGH CD11b MEDIUM cells, the intermediate tone represents the fraction of LY6C/G MEDIUM CD11b HIGH cells and the light tone represents the fraction of myeloid cells excluded by the selected gating parameters. Finally, the dotted areas within each bar represent the fraction of each cell population which is MHC II-positive. The statistical analysis (unpaired, two-tailed Student’s t -test) shown in the right-hand graph refers to the populations of LY6C/G MEDIUM CD11b HIGH cells present in each group (indicated by the lines next to the bars).

Article Snippet: B) 25 μL of the following mixture of fluorescent-labeled antibodies were added to the samples: CD3-APC (BioLegend, San Diego, CA, USA), CD4-BV510 (BioLegend, San Diego, CA, USA), CD8a-PECF594 (BD Bioscience, San Jose, CA, USA), TCRγδ-PE (Miltenyi Biotech, Bergisch Gladbach, Germany), TCRαβ-PEVio770 (Miltenyi Biotech, Bergisch Gladbach, Germany) and MHC II (I-Ek)-VioBright (Miltenyi Biotech, Bergisch Gladbach, Germany).

Techniques: Staining, Immunohistochemistry, Flow Cytometry, Control, Incubation, Two Tailed Test