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5 protocols using pe cy5 conjugated b220

1

Characterization of LA-4 Cell Line

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For characterisation of LA-4 cells, the following antibodies were used: PE-conjugated anti-mouse TLR5 (clone: 85B152.5, 1:100, Abcam, Cambridge, UK), PE-conjugated anti-mouse MHCI (clone: 31-1-2S, 1:100, eBiosciences, Frankfurt, Germany), AF488-conjugated anti-mouse Pan-cytokeratin (clone: AE1/AE3, 1:50, eBiosciences), AF488-conjugated anti-human mucin 1 (clone: SM3, 1:25, eBiosciences), APC-conjugated anti-mouse EpCAM (clone: G8.8, 1:50, eBiosciences), and APC-conjugated anti-mouse CEACAM1 (clone: CC1, 1:50, eBiosciences). Bone marrow-derived mDCs were characterized using anti-mouse pacific blue-conjugated CD11b (clone: M1/70.15, 1:50, Invitrogen, ThermoFisher Scientific, Dreieich, Germany), APC-conjugated CD11c (clone: HL3, dilution: 1:500, BD Bioscience), and PE-Cy5-conjugated B220 (clone: RA3-6B2, dilution: 1:100, BD Bioscience), anti-mouse FITC-conjugated CD3 antibody (clone: 145-2C11, 1:50, BD Biosciences), anti-mouse FITC-conjugated CD19 antibody (clone: 6D5, 1:50, Southern Biotech), and anti-mouse FITC-conjugated CD49b pan NK cell antibody (clone: Dx5, 1:100, BioLegend). Cells were analyzed by flow cytometry using a LSR II flow cytometer (BD Bioscience). Data were analyzed using FlowJo either V.7 or V.10 (Treestar Inc., Ashland, OR, USA).
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2

Lymphocyte Development and CSR Analysis

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Lymphocyte development and in vitro CSR were performed as described before (10 (link),31 (link),32 ). Hematopoietic cells from 5–8 week mice were stained and analyzed on a FACS Calibur flow cytometer (BD Biosciences). The antibodies are: PE-CD4 (clone GK1.5, BD Pharmingen, 553730), FITC-CD8α (clone 53–6.7, BioLegend, 100705), APC-TCRβ (clone H57-597, BD Pharmingen, 553174), PE/Cy7 TER-119 (clone TER-119, BioLegend, 116222), FITC-CD43 (clone S7, BD Pharmingen, 553270), PE-Cy5-B220 (clone RA3-6B2, BD Pharmingen, 553091) and PE-IgM (Southern Biotech, 1020-09). For in vitro CSR, CD43 splenic cells (anti-CD43 magnetic beads, Miltenyi, 130-049-801) were cultured (~1 × 106 cells ml−1) in RPMI (Gibco, 11875-093), serum supplements (10 (link),31 (link),32 ), IL-4 (20 ng/mL; R&D, 404-ML-050), and anti-CD40 (1 μg/mL; BD Bioscience, 553721) and analyses with FITC-conjugated IgG1 (clone A85-1, BD Pharmingen, 553443) and PECy5-conjugated B220 (clone RA3-6B2, BD Pharmingen, 553091). FlowJo software package was used for data analyses
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3

Activation of Dendritic Cells by Allergens

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BALB/c or C57Bl/6 mDCs were seeded at 3.2 × 105 cells/ml in 24-well plates (Thermo Scientific, Dreieich, Germany) and stimulated with the indicated equimolar concentrations of rFlaA, rArt v 1, rFlaA + rArt v 1, rFlaA:Artv1, or rFlaA:Artv1hyp for 24 h. 10 µg/ml LPS (#L5886, Sigma Aldrich, Taufkirchen, Germany) served as positive control. Supernatants were analyzed for cytokine secretion by ELISA. The activation of mDCs was assessed by FACS using anti-mouse FITC-conjugated CD40 and phycoerythrin (PE)-conjugated CD69 mAbs (eBioscience, Frankfurt, Germany). Additionally, cells were stained with anti-mouse pacific blue-conjugated CD11b (Invitrogen, Thermo Fisher Scientific), allophycocyanin (APC)-conjugated CD11c (BD Bioscience, Heidelberg, Germany), and PE-Cy5-conjugated B220 (BD Bioscience) with their respective isotype controls. FITC or PE intensity of CD11b+CD11c+B220 (mDC) cells was quantified by FACS using a LSR II flow cytometer (BD Bioscience, Heidelberg, Germany). For analysis of cell viability mDC were treated as indicated and stained for dead cells using the fixable viability dye eFlour450 (eBiosciences, Frankfurt, Germany). Data were analyzed using FlowJo 10 (Treestar Inc., Ashland, OR, USA).
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4

Quantifying Murine Dendritic Cell Activation

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The activation of mDCs was assessed by flow cytometry using anti-mouse PE-conjugated CD40 (clone: 1C10, dilution: 1 to 100), PE-conjugated CD69 (clone: H1.2F3, dilution: 1 to 150), FITC-conjugated CD80 (clone: 16-10A1, dilution: 1 to 50), FITC-conjugated CD86 (clone: GL1, dilution: 1 to 50, all eBiosciences, Frankfurt, Germany), as well as respective isotype controls. Additionally, cells were stained with anti-mouse pacific blue-conjugated CD11b (clone: M1/70.15, dilution: 1 to 50, Invitrogen, ThermoFisher Scientific), allophycocyanin-conjugated CD11c (clone: HL3, dilution: 1 to 500, BD Bioscience), and PE-Cy5-conjugated B220 (clone: RA3-6B2, dilution: 1 to 100, BD Bioscience) with their respective isotype controls. FITC or PE intensity of CD11b+CD11c+B220− (mDC) cells was quantified by FACS using a FORTESSA flow cytometer (BD Bioscience). Data were analyzed using FlowJo V.7 (Treestar Inc., Ashland, OR, USA).
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5

Flow Cytometry Analysis of rFlaA:Betv1-induced mDC Activation

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rFlaA:Betv1-induced mDC activation was analyzed by flow cytometry using anti-mouse PE-conjugated CD40 (clone: 1C10, dilution: 1 to 100), PE-conjugated CD69 (clone: H1.2F3, dilution: 1 to 150), FITC-conjugated CD80 (clone: 16–10A1, dilution: 1 to 50, all eBiosciences, Frankfurt, Germany). Additionally, cells were stained with anti-mouse pacific blue-conjugated CD11b (clone: M1/70.15, dilution: 1 to 50, Invitrogen, Thermo Fisher Scientific), allophycocyanin-conjugated CD11c (clone: HL3, dilution: 1 to 500, BD Bioscience), and PE-Cy5-conjugated B220 (clone: RA3–6B2, dilution: 1 to 100, BD Bioscience). The FITC- or PE-intensity of CD11b+CD11c+B220 cells (mDCs) was quantified by flow cytometry using a FORTESSA flow cytometer (BD Bioscience). Geometrical mean fluorescence intensities were calculated and normalized to unstimulated cells. Data were analyzed using FlowJo V.7 (Treestar Inc., Ashland, OR, USA).
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