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5 protocols using anti nk1.1 pe

1

Multiparametric Flow Cytometry for Immune Profiling

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For cellular surface staining, cells were labelled with antiCD4-FITC, antiCD8-PE, antiNK1.1-PE, antiLy6G-Pacific Blue, antiCD11b-PE (BD Biosciences) or antiCD11c-FITC (Miltenyi Biotec) diluted in RPMI 1640 culture medium with 10% foetal calf serum (FCS). To determine GZMA-positive populations, cells were fixed and permeabilized with the Cytofix/Cytoperm Fixation/Permeabilization Kit (BD Biosciences) following manufacturer instructions. Cells were stained with antiGZMA antibody diluted 1:100 (provided by Markus Simon [15 (link)]), followed by incubation with a secondary antibody APC-conjugated anti-rabbit IgG (eBiosciences). To analyze IFNγ-producing cells, these were incubated overnight with Purified-Protein Derivative (PPD) 10μg/ml (Statens Serum Institute, SSI). Golgi inhibitor GolgiPlug (BD Biosciences) was added to cells during the last six hours of incubation. Cells were then fixed and permeabilized with the Cytofix/Cytoperm Fixation/Permeabilization Kit and stained with anti-IFNγ-APC (BD Biosciences).
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2

Isolation and Characterization of Immune Cells from Mouse Spinal Cord

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The spinal cord, dissected from mice transcardially perfused with PBS, was minced into 1 mm3 pieces in solution containing 1 mg/mL or 0.1 mg/mL collagenase IV (Worthington Biochemical Corporation, USA) plus 0.4 mg/mL DNase I (Roche, Switzerland), and incubated at 37 °C for 15 min. For isolation of immune cells and microglia, cells were resuspended in 37% Percoll (GE Healthcare, USA) and centrifuged at 780 × g for 20 min. After centrifugation, myelin debris was removed and the cell pellet was collected. Cells were incubated with anti-CD16/CD32 antibodies (eBioscience, USA) for blocking Fc receptors, and then stained with combinations of the following antibodies: anti-CD45-PE-Cy7, anti-CD45-APC-Cy7, anti-CD4-PE, anti-CD8a-FITC, anti-CD8a-APC-Cy7, anti-NK1.1-PErCP-Cy5.5, anti-NK1.1-PE, anti-CD11c-PE, anti-CD11b-APC-Cy7, anti-CD11b-PerCP-Cy5.5 (BD Biosciences, USA), anti-CD4-APC, anti-CD3e-PerCP-Cy5.5, anti-CD86-APC, anti-CD25-PE (eBioscience, USA), anti-CD11c-APC, anti-I-A/I-E (MHC class II)-FITC, anti-CD4-PE-Cy7, anti-CD4-APC, anti-CD68-PE, anti-H-2Kb/H-2Db (MHC class I)-PE, anti-CD206-PE, anti-CD178 (FasL)-PE, and Armenian Hamster IgG Isotype control-PE (BioLegend, USA). Flow cytometry was performed by using FACS Aria and FACS Verse flow cytometers (BD Biosciences, USA) and the data was further analyzed using FlowJo Software (FlowJo, LLC, USA).
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Multiparametric Flow Cytometry of Mouse MNCs

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Mouse MNCs were stained with the following fluorescence-conjugated surface mAbs: anti-CD3-FITC, anti-CD4-APC, anti-CD8-PE-cy7, anti-NK1.1-PE, anti-CD11b-APC-cy7, anti-CD103-BV421, anti-CD11c-BV510, and anti-CD25-APC antibodies (BD PharMingen, USA). The cells were stained according to the standard procedure of BD PharMingen. Fixation and permeabilization were performed using the Transcription Factor Buffer Set (BD PharMingen, USA), and the cells were then stained with the anti-FoxP3-BV421 intracellular antibodies for 40 min at 4°C. To detect Th1 and Th17 cytokines, MNCs suspended in RPMI 1640 medium supplemented with 10% fetal bovine serum were stimulated with a cell stimulation cocktail (eBioscience, USA) containing phorbol-12-myristate-13-acetate (PMA, 50 ng/mL), ionomycin (1 μg/mL), and monensin (2 μg/mL) at 37°C with 5% CO2 for 6 h, and followed by intracellular staining with fluorescently labeled anti-IFN-γ and anti-IL-17 antibodies (BioLegend, USA) after washing, fixing, and permeabilizing according to the manufacturer's instructions. Isotype IgGs were used as a control. All samples were detected using a BD LSR Fortessa X-20 Flow Cytometry System (BD, USA) and analyzed using the FlowJo software.
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4

Splenic Immune Cell Profiling by FACS

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Single-cell suspensions were prepared from the spleen samples and stained for FACS (fluorescence activated cell sorting) analysis as previously described (Shinno-Hashimoto et al., 2022 (link); Zhang et al., 2021b (link)). The following antibodies were used for immunofluorescence staining: anti-CD3-FITC (x40, cat# 100305: BioLegnd, San Diego, CA), anti-CD4-allophycocyanin (x100, cat# 17-0042-82: eBioscience, San Diego, CA), anti-CD8a-allophycocyanin (x100, cat# 553035: BD Bioscience), anti-NK1.1-PE (x100, cat# 553165: BD Bioscience), anti-Ly6c-FITC (x100, cat# 553104: BD Bioscience), anti-CD11b-PE (x400 diluted using FACS buffer, cat# 553312: BD Bioscience, Franklin Lakes, NJ), anti-CD11c-PE (x100, cat# 557401: BD Bioscience), anti-Ter119-PE (x40, cat# 12-5921-83: eBioscience, San Diego, CA), anti-F4/80-PE (x40, cat# 12-4801-80: Invitrogen), and anti-B220-PE (x200, cat# 553309: BD Bioscience). The stained cells were analyzed using a FACSCanto II and FlowJo software (BD Bioscience).
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5

In Vivo Confocal Imaging of Immune Cells

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Confocal microscopy imaging was performed as described previously (24 (link)). Mice were anesthetized (s.c.) with ketamine and xylazine (Syntec, 60 mg/kg and 15 mg/kg, respectively). Before surgery mice received a single dose of IgG (12,5 µg/g, Sigma-Aldrich) and after fifteen minutes they received a mixture of the following antibodies or fluorescent probes: anti-aCD31 BV421 (0,15 µg/g, clone 390, BD), anti-F4/80 BV480 (0,05 µg/g, clone T45-2342, BD), anti-Ly6C BV605 (0,1 µg/g, clone AL-21, BD), anti-aLy6G BV711(0,1 µg/g, clone 1A8, BD), anti-CD19 BB515 (0,1 µg/g, clone 1D3, BD), anti-NK1.1 PE (0,06 µg/g, clone PK136, BD) and anti-CD3e APC (0,06 µg/g, clone 145-2C11, BD) - all from BD Biosciences. In neonatal mice, delivery of drugs (via eye venous plexus) and surgery were made with minor modifications. All images were acquired using an inverted Nikon Eclipse Ti coupled to an A1R confocal microscope loaded with a spectral detector and XYZ motorized stage. Different fields of the organ were pictured. Blood flow analyses was done after FITC-albumin injection (12,5 µg/g, Sigma-Aldrich; i.v.) using resonant scanner (no time lapse). Images and videos rendering were made using NIS-Elements AR Analysis 5.41.01(Nikon) and Volocity(6.3) (Perkin Elmer, Waltham, MA).
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