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5 protocols using anti cxcr5

1

Comprehensive Immunophenotyping of LNMC and PBMC

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Two million of LNMC or PBMC were stained for flow cytometry as previously described to analyze the expression of surface and intracellular markers as well as cellular composition using the 3-laser FACS Fortessa (Becton Dickinson; San Jose, USA)(16 (link)). Antibodies used in these analyses were purchased from either BD or Biolegend and included anti-CD16 (clone 3G8), anti-CD11b (clone M1/70), anti-CD1c (clone L161), anti-CD8 (clone SK1), anti-CD14 (clone M5E2), anti-CD11c (clone 3.9), anti-CD4 (clone OKT4), anti-CD20 (clone 2H7), anti-CD123 (clone 7G3), anti-HLA-DR (clone Immu-357), anti-CD3 (clone SP34–2), anti-CCR6 (clone GO34E3), anti-PD1 (clone EH12.2H7), anti-CD28 (clone 28.2), anti-CD69 (clone FN50), anti-CD95 (clone DX2), anti-CDCXCR3 (clone G025H7), anti-CD25 (clone M-A251), anti-Ki67 (clone B56), anti-CXCR5 (clone 1C6), and anti-CCR7 (clone 3D12). A minimum of 100,000 CD3+ T cells were collected, and post-acquisition analysis performed by Y.C. using FlowJo (Version 9.6, TreeStar) software.
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2

Comprehensive B Cell Immunophenotyping

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For analysis of B cells from blood, cultures or nasal tissue, cell samples were simultaneously Fc-blocked with unlabeled mouse IgG (Lampire) and ICAM-1-blocked with anti-ICAM-1, (BioLegend), which was fluorescently-labeled or not, depending upon the experiment. After 30 minutes at 4°C, B cells were stained with fluorescently tagged virus (Alexa Fluor 488-RV-A39 and Alexa Fluor 568-RV-A16), viability dye Live/Dead Aqua (ThermoFisher), and various combinations of the following fluorescent antibodies depending on the sample type and application: anti-CD3 (BioLegend), anti-CD11c (BioLegend), anti-CD19 (BioLegend), anti-CD20 (BioLegend), anti-CD27 (ThermoFisher), anti-CD38 (Becton Dickinson), anti-CCR5 (ThermoFisher), anti-CXCR3 (BioLegend), anti-CXCR5 (BioLegend), anti-IgD (ThermoFisher), anti-IgM (BioLegend), anti-IgG (BD Biosciences), anti-IgA (Miltenyi), and anti-IgE (BioLegend). After incubating for 30 minutes at 4°C, cells were then fixed and permeabilized (FoxP3 fix/perm kit, ThermoFisher), before staining for intracellular IgM (BioLegend), IgG (Becton Dickinson), IgA (Miltenyi), IgE (BioLegend), Ki-67 (BioLegend), and T-bet (BioLegend). Cells were analyzed on an LSR Fortessa Cytometer (Becton Dickinson) using FlowJo version 10.5.3 (TreeStar). (See Table S1).
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3

Comprehensive Antibody Validation for Immunoblotting and Flow Cytometry

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Anti-mouse β-actin (AF0003; 1:1,000 dilution), Horseradish peroxidase (HRP)-anti-rabbit immunoglobulin G (IgG) (A0208; 1:3,000 dilution) and HRP-anti-mouse IgG (A0216; 1:3,000 dilution) were purchased from Beyotime Institute of Biotechnology (Haimen, China). Anti-ACK1 (PA5-102625) antibody was purchased from Invitrogen (Carlsbad, CA, USA). Anti-p-p65 (9246), anti-p65 (9242), anti-p-Erk (9101), anti-Erk (9107), anti-p-JNK (9251), anti-JNK (9251), anti-p-p38 (4511) and anti-p38 (9228) antibodies were purchased from Cell Signaling Technology (Danvers, MA, USA). For flow cytometry purposes, fluorochrome-conjugated anti-B220 (Cat#: 103206), anti-CD4 (Cat#: 100406), anti-CD40 (Cat#: 124610), anti-F4/80 (Cat#: 123108), anti-CD86 (Cat#: 105012), anti-CD11c (Cat#: 117310), anti-GL7 (Cat#: 144608), anti-CD95 (Cat#: 152604), anti-CXCR5 (Cat#:145506), and anti-PD-1 (Cat#:135206) antibodies were purchased from BioLegend. Unless specifically listed otherwise, all flow cytometry antibodies were stained at a 1:100 dilution.
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4

Comprehensive Immune Cell Profiling

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The cells were resuspended in ice-cold PBS containing 1% FBS and were stained with anti-CD3, anti-CD4, anti-CD8, anti-B220, anti-CD38, anti-CD138, anti-PD-1, anti-CXCR5, anti-CD62L, anti-OX40, anti-IgD, anti-CD95, anti-GL7, anti-CD11c, anti-CD80, anti-CD86, anti-MHC II, anti-CD40, anti-CD69, anti-CD11b, anti-Gr-1, and anti-F4/80 antibodies (Biolegend). Intracellular staining of IFN-γ, TNF-α, IL-17a, Helios, and Foxp3 was performed after 4 h of stimulation with PMA and ionomycin following a standard protocol (BD Biosciences). The results were obtained on a BD FACS Fortessa flow cytometer and were analyzed using FlowJo software.
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5

Comprehensive B Cell Immunophenotyping

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For analysis of B cells from blood, cultures or nasal tissue, cell samples were simultaneously Fc-blocked with unlabeled mouse IgG (Lampire) and ICAM-1-blocked with anti-ICAM-1, (BioLegend), which was fluorescently-labeled or not, depending upon the experiment. After 30 minutes at 4°C, B cells were stained with fluorescently tagged virus (Alexa Fluor 488-RV-A39 and Alexa Fluor 568-RV-A16), viability dye Live/Dead Aqua (ThermoFisher), and various combinations of the following fluorescent antibodies depending on the sample type and application: anti-CD3 (BioLegend), anti-CD11c (BioLegend), anti-CD19 (BioLegend), anti-CD20 (BioLegend), anti-CD27 (ThermoFisher), anti-CD38 (Becton Dickinson), anti-CCR5 (ThermoFisher), anti-CXCR3 (BioLegend), anti-CXCR5 (BioLegend), anti-IgD (ThermoFisher), anti-IgM (BioLegend), anti-IgG (BD Biosciences), anti-IgA (Miltenyi), and anti-IgE (BioLegend). After incubating for 30 minutes at 4°C, cells were then fixed and permeabilized (FoxP3 fix/perm kit, ThermoFisher), before staining for intracellular IgM (BioLegend), IgG (Becton Dickinson), IgA (Miltenyi), IgE (BioLegend), Ki-67 (BioLegend), and T-bet (BioLegend). Cells were analyzed on an LSR Fortessa Cytometer (Becton Dickinson) using FlowJo version 10.5.3 (TreeStar). (See Table S1).
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