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3 protocols using fitc anti ly 6c clone al 21

1

Multiparametric Flow Cytometry of Aortic and Splenic Immune Cells

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Single cell suspensions from the aortae and spleen were obtained as described above and incubated with anti-CD16/32 (BD Biosciences, 553142) and stained on ice for 30 minutes with the following antibodies: Alexa Fluor 594-anti-Vimentin (clone EPR3776, Abcam, ab154207), APC-anti-CD31 (clone 390, Invitrogen, 17–0311-80), FITC-anti-Ly-6C (clone AL-21, BD Biosciences, 553104), PE-Cy5-labeled anti-CD5 (clone 53–7.3, BioLegend, 100609), PE-Cy7-anti-Gr-1 (clone RB6–8C5, Invitrogen, 25–5931-81), APC-Cy7-anti-CD11b (clone M1/70, BioLegend, 101225), and Pacific Blue-anti-F4/80 (clone BM8, BioLegend, 123123). For intracellular staining, cells were fixed and permeabilized with buffers (BD Phosflow Fix Buffer I and Perm Buffer III) according to the manufacturer’s instructions, then stained with Alexa Fluor 488-anti-alpha-smooth muscle actin (α-SMA, clone 1A4, eBioscience, 50–112-4644). Cell suspensions were subjected to flow cytometry (Becton Dickinson LSR II) and analyzed using FlowJo10.1.r5. Macrophages were identified as CD11b+/Ly-6Clow/F4/80+ cells. Ly-6Chi monocytes were identified as CD11b+/Ly-6Chi/F4/80low cells. Neutrophils were identified as CD11b+/Gr-hi cells.
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2

Multiparametric Flow Cytometry of Aortic and Splenic Immune Cells

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Single cell suspensions from the aortae and spleen were obtained as described above and incubated with anti-CD16/32 (BD Biosciences, 553142) and stained on ice for 30 minutes with the following antibodies: Alexa Fluor 594-anti-Vimentin (clone EPR3776, Abcam, ab154207), APC-anti-CD31 (clone 390, Invitrogen, 17–0311-80), FITC-anti-Ly-6C (clone AL-21, BD Biosciences, 553104), PE-Cy5-labeled anti-CD5 (clone 53–7.3, BioLegend, 100609), PE-Cy7-anti-Gr-1 (clone RB6–8C5, Invitrogen, 25–5931-81), APC-Cy7-anti-CD11b (clone M1/70, BioLegend, 101225), and Pacific Blue-anti-F4/80 (clone BM8, BioLegend, 123123). For intracellular staining, cells were fixed and permeabilized with buffers (BD Phosflow Fix Buffer I and Perm Buffer III) according to the manufacturer’s instructions, then stained with Alexa Fluor 488-anti-alpha-smooth muscle actin (α-SMA, clone 1A4, eBioscience, 50–112-4644). Cell suspensions were subjected to flow cytometry (Becton Dickinson LSR II) and analyzed using FlowJo10.1.r5. Macrophages were identified as CD11b+/Ly-6Clow/F4/80+ cells. Ly-6Chi monocytes were identified as CD11b+/Ly-6Chi/F4/80low cells. Neutrophils were identified as CD11b+/Gr-hi cells.
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3

Treg Cell and MDSC Quantification

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The CD4+Foxp3+ (Treg cells) and MDSC were measured by flow cytometry at day 7 post immunization protocol and at day 21 post infection. Briefly, mice were sacrificed and spleen single cell suspensions were prepared by homogenization through a stainless steel mesh using PBS 3% fetal bovine serum (FBS). Spleen absolute numbers were determined by counting cells in Neubauer chamber using Turk solution and then red blood cells were eliminated by lysis with H20 during 30 seconds. Finally, spleen cells were homogenized in PBS 3% FBS and 1.106 cells were stained with the following antibodies from BD-Pharmingen: fluorescein isothiocyanate (FITC) anti-CD4 (clone RM4-5), FITC anti-Ly6C (clone AL-21), phycoeritrin (PE) anti-Ly6G (clone 1A8), PE anti-GR1 (clone RB6-8C5) and PerCP-Cy 5.5 anti-CD11b (clone M1/70). Cells marked with CD4 were also intracellular stained for PE anti-Foxp3, using mAb from Miltenyi Biotec, according to manufacturer´s instructions.
Samples were acquired on an Attune NxT cytometer (Invitrogen) and analyses were performed using FlowJo software.
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