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6 protocols using mojosort mouse anti apc nanobeads

1

Isolation of Lung Immune Cells

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Lung ILC2s (defined as Lin -CD45 + CD127 + CD90.2 + ST2 + CD25 + living cells) were sorted after negative enrichment against lineage markers (B220, CD11c, CD3, CD4, CD49b, CD5, CD8α, F4/80, FcεR1, Gr1 and Siglec-F) using MojoSort™ Mouse anti-APC Nanobeads (Biolegend) and magnetic separation using LD columns (Miltenyi). Lung ILCs (defined as Lin -CD45 + CD90.2 + living cells) were sorted after negative enrichment against lineage markers (B220, CD11c, CD3, CD4, CD5, CD8α, F4/80, FcεR1, Ly6G and Siglec-F) using MojoSort™ Mouse anti-APC Nanobeads and magnetic separation using LD columns (Miltenyi). AMs from BALF were defined as autofluorescent, FSC-A high living cells. Lung ECs were sorted (CD45-CD31-Epcam+ live cells) after depletion of CD45+ cells using using MojoSort™ Mouse anti-CD45 Nanobeads (Biolegend). BM Mos were sorted (CD19-CD3-CD11b+Ly6C+ living cells), after depletion of Ly6G+ and B220+ cells using MojoSort™ Mouse anti-APC Nanobeads (Biolegend) and magnetic separation using LD columns (Miltenyi). All cells were sorted on a FACSAria IIIu (BD Biosciences).
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2

Adoptive Transfer of Memory OT-I Cells

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Naïve CD8 T cells were harvested from CD45.1 OT-I mice (WT) or GZB-cre Zbtb20-fl/fl CD45.1 OT-I mice (KO) using EasySep mouse naïve CD8 T cell isolation kit (Stemcell Technologies cat:19858A). 50,000 naïve OT-I cells were retro-orbitally injected into B6 recipients, which were then retro-orbitally infected with 106 CFU LM-actA-Ova 1 day later. On D80 post infection, splenocytes were harvested from recipients, stained with anti-CD45.1-APC antibody then purified with Mojosort mouse anti-APC nanobeads (Biolegend Cat:480072). 106 enriched memory OT-I cells were adoptively transferred into MC38-Ova tumor-bearing mice, which were subcutaneously inoculated with 106 MC38-Ova tumor cells 4 days earlier. Tumor areas were measured three times a week.
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3

Flow Cytometry Analysis of Intestinal Epithelial Cells and Rotavirus Infection

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Dissociated cells were collected and stained for flow cytometry. Cells were stained with Zombie Aqua viability dye (BioLegend), Fc receptor-blocking antibody (CD16/CD32; BioLegend), anti-EpCAM (clone G8.8; BioLegend), and anti-CD45 (clone 30-F11; BioLegend). For analysis of murine rotavirus infection, cells were stained with anti-rotavirus (polyclonal; ThermoFisher, #PA1-7241) followed by goat anti-rabbit secondary (ThermoFisher). All data were analyzed using FlowJo software (BD Biosciences). Gates were set based on unstained and single-fluorophore stains. IECs were selected by gating on live, EpCAM-positive, CD45-negative cells. Gates for murine rotavirus infection were set based on naïve samples.
Where indicated, dissociated cells were enriched using MojoSort Mouse anti-APC Nanobeads (BioLegend, #480072) after flow cytometry staining for anti-EpCAM and anti-CD45 with APC fluorophores by following manufacturer protocols.
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4

Measuring Metabolic Activity in Activated CD8 T Cells

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Naïve CD8 T cells were purified from spleens of CD45.1 OT-I mice (WT) or GZB-cre Zbtb20-fl/fl CD45.1 OT-I mice (KO) using EasySep mouse naïve CD8 T cell isolation kits (Stemcell Technologies cat:19858A). 50,000 naïve OT-I cells were retro-orbitally injected into congenic recipient mice, which were then retro-orbitally infected with 106 CFU LM-actA-Ova 1 day later. On D7 and D28 post infection, splenocytes were harvested from recipients, stained with anti-CD45.1-APC then purified with Mojosort mouse anti-APC nanobeads (Biolegend Cat:480072). Purified cells (purity greater than 95%) were then analyzed using a luminescence-based ATP detection assay (Cayman Chemical cat:700410).
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5

Metabolic Profiling of Antigen-Specific CD8+ T Cells

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Naïve CD8 T cells were harvested from CD45.1 OT-I mice (WT) or GZB-cre Zbtb20-fl/fl CD45.1 OT-I mice (KO) using EasySep mouse naïve CD8 T cell isolation kits (Stemcell Technologies cat:19858A). 50,000 naïve OT-I cells were retro-orbitally injected into B6 recipients, which were then retro-orbitally infected with 106 CFU LM-actA-Ova 1 day later. On D7 and D28 post infection, splenocytes were harvested from recipients, stained with anti-CD45.1-APC antibody then purified with Mojosort mouse anti-APC nanobeads (Biolegend Cat:480072). 200,000 enriched cells (purity greater than 95%) were seeded into each well for Seahorse mitochondrial stress tests and Glycolytic Rate tests. 1 μM oligomycin, 1.5 μM 4-(trifluoromethoxy)phenyl)carbonohydrazonoyl dicyanide (FCCP) and 0.5 μM Rotenone/Antimycin A were used for mitochondria stress assays. 0.5 μM Rotenone/Antimycin A and 50mM 2-deoxyglucose were used for Glycolytic rate assays.
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6

Murine CD8+ T Cell Isolation and Metabolic Profiling

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EasySep Mouse naïve CD8 T cell isolation kits (Stemcell Technologies cat:19858A); Mojosort mouse anti-APC nanobeads (Biolegend Cat:480072); ATP detection assay kit-luminescence (Cayman Chemical cat:700410); DAPI (Thermo Fisher cat:D1306); Seahorse XF Cell Mito Stress Test Kit (Seahorse Agilent cat:103015-100); 2-DG (Cayman Chemical cat:14325); SIINFEKL peptide (New England peptide Lot:V1355-37/40); recombinant human IL-2 (TECIN cat:Ro23-6019); recombinant murine IL-15 (PeproTech cat:210-15); poly-D-lysine (Millipore Sigma cat:P6407); Glutaraldehyde (Electron Microscopy Science cat:16000); NaBH4 (Alfa Aesar stock#:35788); Triton X-100 (PerkinElmer cat:N9300260).
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