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4 protocols using anti tlr4 apc

1

Neutrophil Surface Receptor Expression Analysis

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Neutrophil surface receptor expression was assessed in whole blood. Briefly, 100 μL of heparin treated blood was dispensed into 5 mL tubes and stored at 4°C in the dark. Cells were stained with anti-CXCR2-PE (ThermoFisher, clone 5E8-C7-F10), anti-CD16-FITC (BD Bioscience, clone 3G8), anti-CD11b-APC (BD Bioscience, clone ICRF44), anti-CD18-PE (BD Bioscience, clone 6.7), anti-TLR2-Alexa-647 (BD Bioscience, clone 11G7) or anti-TLR4-APC (ThermoFisher, clone HTA-125) or their relevant concentration-matched isotype control for 30 min on ice in the dark. Following incubation, cells were washed twice in cold PBS and erythrocytes lysed and leukocytes fixed using 1% fix/lyse solution (ThermoFisher Scientific). Following fixation, cells were washed twice and resuspended in 300 μL PBS/1%BSA for analysis by flow cytometry. All flow cytometry analyses were conducted on a BD FACSCanto II (BD Bioscience, United States) flow cytometer equipped with 3-lasers using the Duke Cancer Institute Core Facility, which maintained daily quality controls of the machine. Analyses were completed on 10,000 neutrophils and data analyzed using FCS Express 6 (FCS Express, United States).
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Neutrophil Surface Receptor Profiling in Whole Blood

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Neutrophil surface receptor expression was assessed in heparin-treated fresh whole blood similar to previously described (18 (link)). Briefly, 100µL of heparin-treated blood was dispensed into 5mL tubes at 4°C in the dark. Cells were stained with anti-CXCR2-PE (ThermoFisher, clone 5E8-C7-F10), anti-CD16-FITC (BD Bioscience, clone 3G8), anti-TLR2-Alexa-647 (BD Bioscience, clone 11G7), and anti-TLR4-APC (ThermoFisher, clone HTA-125) or their relevant concentration-matched isotype control for 30 minutes at 4°C in the dark. Following incubation, cells were washed twice in at 4°C PBS and erythrocytes lysed, and leukocytes fixed using 1% fix/lyse solution (ThermoFisher Scientific). Following fixation, cells were washed twice and resuspended in 300µL PBS/1%BSA for analysis by flow cytometry.
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Characterization of Peripheral Blood Immune Cells

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Peripheral blood mononuclear cells (PBMCs) were isolated from 12 mL of peripheral venous blood samples collected in K3EDTA tubes (BD vacutainer) by centrifugation using a Ficoll-Paque gradient and were frozen at −80°C. Prior to flow cytometry analyses, cells were thawed, and PBMCs subtypes were distinguished using the following antibodies: anti-CD45-Pacific orange (Invitrogen), anti-CD3-V450 (BD Biosciences), anti-CD4-PE-texas red (Invitrogen), anti-CD8-APC-H7 (BD Biosciences), anti-CD19-PE-Cy7 (BD Biosciences), anti-CD14-PerCP-Cy5 (BD Biosciences), anti-CD16-FITC (BD Biosciences), anti-TLR2-PE (eBiosciences), and anti-TLR4-APC (eBiosciences) (all made in mouse). Data acquisition was performed using a BD LSR II flow cytometer, and the results were analyzed with BD eDiva Software (version 6.1.2, BD Biosciences) and FCS Express 4 Flow Cytometry (De Novo Software).
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4

TLR-4 and RAGE Signaling in DU145 Cells

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For TLR-4 staining, 5 × 105 cells were incubated with anti-TLR4-APC (eBiosciences) for 30 min in 0.5% BSA in PBS on ice; for RAGE staining, cells were incubated with mouse anti-RAGE (Abcam) for 30 min on ice, washed with PBS and then incubated with an Alexa 647 anti-mouse secondary antibody (Invitrogen). The data were collected using a LSRII (BD Pharmingen, San Diego, CA), and the results were analyzed using Flowjo 6.3.4 software (TreeStar). After confirmation of their presence, DU145 cells were pretreated with 2.5 μg/ml anti-TLR4 (R&D Systems), 2.5 μg/ml anti-RAGE (R&D Systems), 2.5 μg/ml each of both antibodies, or control medium for 30 min in 6 well plates, before adding 1.0 μg/ml recombinant HMGB1 or supernatants harvested from DTX-treated DU145 tumor cells. After further 24 h incubation, cells were lysed and subjected to immunoblotting with anti-clusterin as described above.
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