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I a 1 e m5 114

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The I-A/I-E (M5/114.15.2) is a laboratory reagent used for the detection and analysis of major histocompatibility complex (MHC) class II molecules. It is a monoclonal antibody that binds to the I-A and I-E regions of the MHC class II complex in mice. This product can be used in various immunological techniques, such as flow cytometry, immunohistochemistry, and ELISA, to identify and characterize cells expressing these MHC class II molecules.

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11 protocols using i a 1 e m5 114

1

Modulating Androgen Levels in Mice

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Degarelix (as acetate), a third generation LHRH-Ant (Firmagon), was resuspended in sterile water for injection and administered s.c. to mice at a dose of 40 µg/g. Lupron (11.25-mg 3-mo depot), an LHRH-Ag, was prepared according to the manufacturer’s instructions and administrated intramuscularly to mice at a dose of 20 µg/g. Degarelix and Lupron were purchased from the MSKCC Pharmacy. Testosterone propionate (Sigma-Aldrich) was resuspended in peanut oil and injected daily s.c. (1 mg/mouse) in 100 µl. Surface antibodies against CD44 (IM7), EpCAM (G8.8), PDGFRa (APA5), PECAM-1 (390), CD45 (30-F11), and H-2Kk (AF3-12.1.3) were purchased from eBioscience; anti-Ly-51 (BP-1), CD34 (RAM34), CD62L (MEL-14), H-2Kb (AF6-88.5), IFN-γ (XMG1.2), IL-2 (JES6-5H4), c-Kit (2B8), CD3ε (145-2C11), CD25 (PC61), TER-119 (TER-110), and CD8α (53–6.7) were purchased from BD; anti-CD4 (RM4-5) and B220 (RA3-6B2) were purchased form Invitrogen; anti-CD44 (IM7), CD90.2 (30-H12), and IA/IE (M5/114.15.2) were purchased from BioLegend; and Ulex europaeus agglutinin 1 (UEA-1) was purchased from Vector Laboratories. For in vitro cultures of T cell differentiation (Fig. 2, A and B), cells were stained with antibodies to lineage (Lin)-specific markers: CD8, CD11c, NK1.1, CD3, CD4, B220, CD11b, and GR-1.
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2

Immune cell antibody staining

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Mouse antibodies (Abs) and isotype control Abs (IgG1, IgG2a, and IgG2b), anti-CD3 (17A2), CD4 (GK1.5), CD8α (53–6.7), tumor necrosis factor (TNF)-α (MP6-XT22), perforin (S16009A), CD11c (N418), CD40 (3/23), CD80 (16-10A1), CD86 (GL-1), anti-interferon (IFN)-γ (B27), MHC class I (H2Kd, 28-8-6), and MHC class II (I-A/I-E, M5/114.15.2) were purchased from BioLegend (San Diego, CA, USA).
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3

Isolation and Characterization of Murine Immune Cells

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Splenocytes were isolated as previously described(23 ). PBS-perfused kidneys and lungs were minced and digested with collagenase IV (100 μg/ml) for 30 minutes at 37 °C to prepare single cells.
Isolated cells were stained with the following antibodies specific for: TCRβ (H57-597, BioLegend), CD3ε (145-2C11, eBiosciences), CD4(GK1.5, BioLegend), CD8α (53-6.7, eBiosciences), B220 (RA3-6B2, BioLegend), CD25(PC61, BioLegend), I-A/I-E (M5/114.15.2, BioLegend), Nkp46 (29A1.4, BioLegend) for 30min at 4 °C. For intracellular staining, cells were stimulated with 20 ng/ml of phorbol-myristate acetate (PMA, Sigma) and 1 mg/ml of ionomycin(Sigma) for 4 hours, washed and stained with TCRβ, CD4, CD8, I-A/I-E. BD cytofix/cytoperm plus with Golgi stop staining kits (BD Biosciences) were used according to the manufacturer’s protocol. Antibodies of IFN-γ (XMG1.2, BioLegend) and IL-17A (TC11-18H10.1, BioLegend) were used for detecting intracellular cytokines.
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4

Immune Cell Phenotyping Protocol

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Fc receptors were blocked with anti-CD16/32 (2.4G2, BD Pharmingen). Cell viability was assessed using Zombie Violet dye (Biolegend). Cells were suspended in 1X PBS (pH 7.4) containing 0.01% NaN3 and 1% fetal bovine serum. Surface staining included antibodies specific for murine: Siglec F (E50–2440, BD Pharmingen), CD11b (M1/70), CD64 (X54–5/7.1), CD45 (104), CD3 (17A2, eBiosciences), CD4 (RM4–4), CD8 (53–6.7, BD Biosciences), CD19 (1D3, eBiosciences), CD11c (N418), CD103 (M290, BD Biosciences), (I-A/I-E (M5/114.15.2), and Ly6G (1A8) (reagents from Biolegend unless otherwise noted). Cell numbers were enumerated using Polybead Polystyrene 15.0 um Microspheres (Polysciences). Cell sorting was performed on a FACS Aria (BD Biosciences). Sorted cells were collected in complete media, spun down, resuspended in Trizol, and frozen at −80°C overnight prior to RNA isolation. Samples for flow cytometry were fixed in 2% paraformaldehyde solution in PBS and analyzed using a LSRII flow cytometer (BD Biosciences) and FlowJo software (Tree Star, Inc.).
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5

Multiparameter Flow Cytometry Analysis

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Single cell splenocyte suspensions were prepared and stained in ice-cold PBS with Ghost Dye Violet 510 (Tonbo Biosciences, San Diego, CA) to exclude dead cells. Surface staining was subsequently performed in PBS containing 3% FCS and 5 mM EDTA in the presence of unconjugated anti-CD16/32 clone 2.4G2 (purified in-house). Antibody clones used for staining were directed against CD45R (RA3-6B2), CD23 (B3B4), CD19 (1D3), CD11c (HL3) and TCRß (H57-597) (BD Biosciences, Franklin Lakes, NJ); CD62L (Mel-14), CD138 (281–2), CD11b (M1/70), TCRß (H57-597) and I-A/I-E (M5/114.15.2) (BioLegend, San Diego, CA); SiglecH (eBio440c) (eBioScience, San Diego, CA); and Ly6G (1A8), CD45R (RA3-6B2), CD19 (1D3), CD21/35 (7G6), CD317 (927), CD44 (Pgp1), CD8 (TIB105), and CD4 (GK1.5) (purified and fluorophore-conjugated in-house). Peanut agglutinin (PNA) was from Vector Laboratories (Burlingame, CA). All antibodies and PNA were titered prior to experimental use. Cells were fixed with 1xPBS 1% paraformaldehyde. Flow cytometry data was collected on a BD LSRII or BD Fortessa and analyzed in FlowJo (Tree Star, Ashland, OR).
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6

Multicolor Flow Cytometry for Conjunctival Immune Cells

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For conjunctival staining, the following antibodies or dyes were used for flow cytometry: Viability (65–0863-14, eBioscience), F4/80 (BM8, eBioscience), Ly6C (HK1.4, BioLegend), Ly6G (1A8, BioLegend), CD64 (X54–5/7.1, BioLegend), I-A/I-E (M5/114.15.2, BioLegend), CD11b (M1/70, BD Pharmingen), CD11c (HL3, BD Pharmingen), CD45 (30-F11, BioLegend), Siglec-F (E50–2440, BD Pharmingen) CD4 (RM4–5, BD Pharmingen). For dLN cells: Viability, extracellular CD4 (RM4–5, BD Pharmingen) and intracellular IL-4 (11B11, BioLegend), IL-13 (eBio13A, eBioscience), IL-17(TC11–18H10, BD Pharmingen), and IFN-g (XMG1.2, Biolegend). Data was acquired on BD Fortessa LSRII and analyzed on FloJo (Treestar Inc.)
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7

Multiparametric Flow Cytometry Analysis

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Tetramer-enriched samples were stained for surface markers for 30 minutes on ice using antibodies to: CD4 (GK1.5, BD), CD8 (53–6.7, BD), CD90.1 (HIS51), CD90.2 (53–2.1, 30-H12), CD3e (145-2C11, BD), CD11b (M1/70), CD11c (N418), F4/80 (BM8), CD44 (IM7, BD), CD45.1 (A20, Biolegend), CD45.2 (104), B220 (RA3–6B2), and/or PD1 (J43). Cellular viability was confirmed using GhostDye Red 780 (Tonbo Biosciences). For transcription factor expression analysis, stained cells were fixed and permeablized using the Foxp3/Transcription Factor Staining Buffer Set (eBioscience) according to the manufacturer’s instructions. Cells were stained overnight at 4°C with antibodies to T-bet (4B10, Biolegend), Foxp3 (FJK-16s), RORγt (Q31-378, BD), and Bcl-6 (K112-91, BD). For thymic dendritic cell and thymic epithelial cell analyses cells, following enrichment cells were stained with antibodies to CD11c (N418), CD19 (6D5, Biolegend), I-A/I-E (M5/114.15.2, Biolegend), CD8 (53–6.7, BD), CD90.2 (53–2.1, 30-H12), CD11b (M1/70), and CD45.2 (104, BD). Antibodies were purchased from eBioscience unless otherwise indicated. Cells were analyzed by flow cytometry on a Fortessa (BD). Data were analyzed using FlowJo software (TreeStar).
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8

Multiparameter Flow Cytometry Analysis

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The following antibodies or dyes were used for flow cytometry: Viability (65-0863-14, eBioscience), ALDH/ALDEFLUOR (01700, Stem Cell Technologies), F4/80 (BM8, eBioscience), CD103 (2E7, BioLegend), Ly6C (AL-21, BD Pharmingen), Ly6G (1A8, BioLegend), CD64 (X54-5/7.1, BioLegend), I-A/I-E (M5/114.15.2, BioLegend), CD11b (M1/70, BD Pharmingen), CD11c (HL3, BD Pharmingen), CD45 (30-F11, eBioscience), Siglec-F (E50-2440, BD Pharmingen), CD8 (53-6.7, BioLegend), CD3 (17A2, BioLegend), and B220 (RA3-6B2, BioLegend). Data acquired on BD Fortessa LSRII and analyzed on FloJo (Treestar Inc.)
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9

Multiparametric Flow Cytometry Analysis

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Tetramer-enriched samples were stained for surface markers for 30 minutes on ice using antibodies to: CD4 (GK1.5, BD), CD8 (53–6.7, BD), CD90.1 (HIS51), CD90.2 (53–2.1, 30-H12), CD3e (145-2C11, BD), CD11b (M1/70), CD11c (N418), F4/80 (BM8), CD44 (IM7, BD), CD45.1 (A20, Biolegend), CD45.2 (104), B220 (RA3–6B2), and/or PD1 (J43). Cellular viability was confirmed using GhostDye Red 780 (Tonbo Biosciences). For transcription factor expression analysis, stained cells were fixed and permeablized using the Foxp3/Transcription Factor Staining Buffer Set (eBioscience) according to the manufacturer’s instructions. Cells were stained overnight at 4°C with antibodies to T-bet (4B10, Biolegend), Foxp3 (FJK-16s), RORγt (Q31-378, BD), and Bcl-6 (K112-91, BD). For thymic dendritic cell and thymic epithelial cell analyses cells, following enrichment cells were stained with antibodies to CD11c (N418), CD19 (6D5, Biolegend), I-A/I-E (M5/114.15.2, Biolegend), CD8 (53–6.7, BD), CD90.2 (53–2.1, 30-H12), CD11b (M1/70), and CD45.2 (104, BD). Antibodies were purchased from eBioscience unless otherwise indicated. Cells were analyzed by flow cytometry on a Fortessa (BD). Data were analyzed using FlowJo software (TreeStar).
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10

Evaluating Dendritic Cell Maturation and Antigen Uptake

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Cells were stimulated with LPS (1 µg/ml) derived from Escherichia coli (0111:B4; Sigma-Aldrich, St. Louis, MO) at 37°C for 24 h. Cells (5×105) were collected, washed and incubated with Fc Block at 4°C for 5 min. They were labeled with APC-conjugated anti-CD40 (HM40-3, eBioscience), FITC-anti-CD80 (16-10.A1, eBioscience), PE-Cy7-anti-CD86 (GL1, BD), APC-MHC-class I (H2Kb) (AF6-88.5.5.3, eBioscience) and PE-Cy7-MHC class II (IA, IE) (M5/114.15.2, Biolegend, San Diego, CA), together with APC-anti-eFlour780-anti-CD11c (N418, eBioscience) or PE-anti-CD11c (HL3, BD) at 4°C for 30 min. In flow cytometry, live CD11c+ PI-negative cells were gated to evaluate maturation. To evaluate antigen uptake, cells were incubated with 10 µg/ml FITC-dextran (Sigma Aldrich) at 4°C or 37°C for 15 min. Cells were then labeled with APC-eFlour780-anti-CD11c. The capacity of CD11c+ cells in dextran uptake was evaluated.
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