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6 protocols using anti cd11c n418

1

Depletion and Immunophenotyping of Murine Hematopoietic Cells

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For sorting, FLs were depleted (Ter119+CD45+) using MACS Columns (Miltenyi Biotec; Cat# 130–042-401). Cell suspensions were stained for 20–30 min at 4°C in the dark with the following antibodies when appropriate: CD11b (M1/70), CD16/32 (93 or 2.4G2), CD19 (1D3), CD24 (M1/69), CD31 (MEC13.3 or 390), CD324 (DECMA-1), CD34 (RAM34), CD41 (MWReg30), CD45 (30-F11 or 104), CD54 (YN1/1.7.4), CD71 (C2), Gr1 (RB6-8C5), Il7ra (A7R34), Ki-67 (SolA15), c-Kit (2B8), Sca1 (D7), and Ter119 (obtained from SONY, BD Biosciences, Biolegend, or eBioscience). Biotinylated antibodies were detected by incubation for 15 min at 4°C in the dark with streptavidin. Antibodies to lineage markers included anti-Ter119 (TER-119), anti-Gr1 (RB6-8C5), anti-CD19 (6D5), anti-CD3 (145-2C11), anti-CD4 (GK1.5), anti-CD8 (53–6.7), anti-NK1.1 (PK136), anti-Il7r (A7R34), anti-TCRβ (H57-597), anti-TCRγδ (GL3), and anti-CD11c (N418) obtained from SONY, BD Biosciences, Biolegend, or eBioscience. Stained cells were analyzed on a custom BD LSR Fortessa or BD FACSymphony and were sorted with a BD FACSAria III (BD Biosciences) according to the guidelines for the use of flow cytometry and cell sorting (Cossarizza et al., 2019 (link)). Data were analyzed with FlowJo software (BD Biosciences; v.10.5.3) or R packages as described in Bioinformatic analysis.
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2

Immune Cell Phenotyping by Flow Cytometry

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Single cells were isolated from spleen and thymus and stained with monoclonal antibodies for immune cell phenotyping as previously described [28 (link)]. Briefly, after isolating the single cells, their non-specific binding was inhibited by blocking Fc receptors, and then the lymphocytes were stained with monoclonal antibodies; anti-CD4 (clone GK1.5), anti-CD8 (clone 53–6.7), anti-CD11b (clone M1.70) and anti-CD11c (N418) (BD biosciences, Franklin Lakes, NJ, USA). Lastly, the stained cells were fixed with 1% paraformaldehyde in phosphate-buffered solution (PBS). Approximately 10,000 cells from each sample were analyzed using a fluorescence-activated cell sorting (FACS) Caliver system (Becton, Dickinson and Company, Franklin Lakes, NJ, USA).
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3

Bone Marrow Transplantation: Assessing Donor Engraftment

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WT [CD45.1] and Trif−/− [CD45.2] mice were used so that donor and host cells could be distinguished from one another. Recipient mice were lethally irradiated using a Cesium irradiator (9.25 Gy over 12 min.), and were injected i.v. with 107 bone marrow cells. At 13 weeks post-irradiation, antibodies against CD45.1 (A20) and CD45.2 (104) were used to assess donor engraftment in T cells (anti-CD3), B cells (anti-CD19; 6D5), myeloid cells anti-CD11b (M1/70), and DCs and alveoloar macrophages (anti-CD11c; N418 and HL3), BD Biosciences, BioLegend and eBioscience, San Diego, CA. At least 85% reconstitution was observed for each cell population tested.
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4

Immunohistochemical Staining of Tumor Sections

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Tumors were harvested, bisected, and fixed using BD cytofix (diluted 1:3 in PBS) for 24 h at 4 °C. Fixed samples were washed twice with PBS and dehydrated with 30% sucrose for 24 h before embedding in OCT. 20 μm sections were prepared using a cryostat and blocked using a buffer containing 1% normal mouse serum, 1% bovine serum albumin, and 0.3% Triton-X 100 for 1 h. Sections were stained with directly conjugated antibodies for 8 h at RT or overnight at 4 °C in a dark humidified chamber, and imaged using a Leica SP8 microscope, as described (Gerner et al., 2012 (link)). The following antibodies were used for staining: anti-CD64 (X54–5/7.1, Biolegend), anti-CD11c (N418, BD), anti-CD45.1 (A20, BD Biosciences), anti-MHC-II (M5/114.15.2, Biolegend) conjugated in house with Dy396XL (Dyomics, 396XL-01A), anti-Fascin1 (55K-2, Santa Cruz Biotechnology), anti-CD31 (MEC 13.3, Biolegend) and anti-CD3e (17A2, Biolegend).
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5

Fc Receptor Blocking for Immunophenotyping

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All staining reactions were performed at 4°C on cells first exposed to Fc receptor mAb (2.4G2) in order to reduce nonspecific binding. Anti CD11b (M1/70) and anti-CD11c (N418) were purchased from BD Biosciences-Pharmingen. Cells were analyzed with a BD LSRFortessa flow cytometer (BD) equipped with BD FACSDiva 7.0 software.
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6

Bone Marrow Transplantation: Assessing Donor Engraftment

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WT [CD45.1] and Trif−/− [CD45.2] mice were used so that donor and host cells could be distinguished from one another. Recipient mice were lethally irradiated using a Cesium irradiator (9.25 Gy over 12 min.), and were injected i.v. with 107 bone marrow cells. At 13 weeks post-irradiation, antibodies against CD45.1 (A20) and CD45.2 (104) were used to assess donor engraftment in T cells (anti-CD3), B cells (anti-CD19; 6D5), myeloid cells anti-CD11b (M1/70), and DCs and alveoloar macrophages (anti-CD11c; N418 and HL3), BD Biosciences, BioLegend and eBioscience, San Diego, CA. At least 85% reconstitution was observed for each cell population tested.
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