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6 protocols using apc conjugated cd11b

1

Murine Neuroinflammation Immunostaining Protocol

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We obtained murine recombinant IL-33 (580506), AF647-conjugated Aβ (clone: 6E10) antibody (803021), APC-conjugated MHC-II (clone: M5/114.15.2) antibody (107614), FITC-conjugated VCAM1 (clone: MVCAM.A) antibody (105706) and MHC-II (I-A/I-E) (clone: M5/114.15.2) antibody (107601) from BioLegend. We obtained ICAM1-neutralizing (clone: YN1/1.7.4) antibody (BE0020)75 (link),76 (link) and VCAM1-neutralizing (clone: M/K-2.7) antibody (BE0027)69 (link),77 (link) from Bio X Cell. We obtained AF488-conjugated CD11b (clone: M1/70) antibody (53-0112-82), APC-conjugated CD11b (clone: M1/70) antibody (17-0112-83) and biotinylated CD11b (clone: M1/70) antibody (13-0112-82) from eBioscience. ApoE-neutralizing (clone: HJ6.3) antibody was a gift from D. Holtzman36 (link). We obtained DAPI (D3571) from Life Technologies, and mouse ITGB2 recombinant protein (LS-G14036-10) was from LSBio. We obtained mouse ApoE recombinant protein (MBS955382) from MyBioSource as well as CCR7 neutralizing (clone: 4B12) antibody (MAB3477)78 (link) and VCAM1 antibody (BBA5) from R&D Systems. We obtained recombinant mouse CD44 protein (53953-M08H) from Sino Biological, MeX04 (4920) from Tocris Bioscience and Iba1 antibody (019-19741) from Wako.
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2

Tolerogenic Dendritic Cell and T-Cell Analysis

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Directly after euthanasia of the mice, the mesenteric lymph node was placed in ice-cold PBS. Single-cell suspensions were prepared by disrupting the lymph node between two microscope glasses and passing it through a 70 μm nylon mesh. After washing and resuspension, 1 × 106 cells were surface stained for 30 min with antibodies for Percp-Cy5.5 conjugated CD11c, PE-conjugated CD86, APC-conjugated CD11b, and FITC-conjugated CD103 (all antibodies were purchased from eBiosciences) for the detection of tolerogenic dendritic cells (DCs). For the detection of T cell subsets, 1 × 106 cells were initially surface stained for 30 min with FITC-conjugated CD3, PercP-Cy5.5-conjugated CD4, and APC-conjugated CD8a (ebiosciences), then fixate and permeabilized with the FoxP3/Transcription Factor Staining Buffer Set (ebiosciences), and finally stained for 30 min with PE-conjugated intracellular forkhead box P3 (FOXP3) (ebioscience). Analysis was performed using an Accuri C6 flow cytometer (Accuri Cytometers).
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3

Multiparameter Flow Cytometry Analysis

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Cell suspensions were labelled with anti-mouse phycoerythrin (PE)-conjugated VEGFR1 (#FAB4711P; R&D Systems), anti-mouse PE-F4/80 (#12-4801; eBioscience Inc., CA, USA), anti-mouse PE-VEGFR2 (#12-5821; eBioscience), anti-mouse PE-CD335 (#12-3351; eBioscience), anti-mouse PE-CD202b (TIE2) (#12-3351; eBioscience), anti-mouse PE-Ly-6G (Gr-1) (#12-5931; eBioscience) and anti-mouse allophycocyanin (APC)-conjugated Cd11b (#53-0112; eBioscience) with corresponding isotype control. Then the samples were analysed on BD FACSCanto II Analyzer (BD Biosciences), and cell sorting was performed on BD FACSAria I Cell Sorter (BD Biosciences). The data analysis was carried out by using FlowJo software (Tree Star Inc., Ashland, OR, USA).
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4

Phenotyping tumor-infiltrating immune cells

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Single-cell suspensions from MC38-Vector or MC38-IL33 tumors were incubated with APC-conjugated CD11b, FITC-conjugated anti-Gr1, PE-conjugated anti-F4/80, or eFluor450-conjugated anti-CD45 (all from eBioscience, San Diego, CA). One million cells were incubated with antibodies in 100 μL wash buffer (PBS with 0.1% BSA) at 4°C for 1 h. Cells were washed twice with ice-cold wash buffer and fixed with 1% paraformaldehyde. FACS analyses were performed on a Beckton Dickinson LSRII flow cytometer and analyzed with FACSDiva 8.0 software (BD Biosciences).
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5

Assessing Knockout Cell Differentiation and Apoptosis

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Cells were transduced with gRNA-expressing lentivirus and BFP-positive (knock-out) cells were collected by cell sorting. For differentiation analysis, cells were stained with APC-conjugated CD11b (eBioscience) 7 days post transduction. For apoptosis assays, cells were analysed 9 days post transduction using Annexin V Apoptosis Detection Kit APC (eBioscience). Details in Supplementary Methods.
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6

Assessing Knockout Cell Differentiation and Apoptosis

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Cells were transduced with gRNA-expressing lentivirus and BFP-positive (knock-out) cells were collected by cell sorting. For differentiation analysis, cells were stained with APC-conjugated CD11b (eBioscience) 7 days post transduction. For apoptosis assays, cells were analysed 9 days post transduction using Annexin V Apoptosis Detection Kit APC (eBioscience). Details in Supplementary Methods.
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