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3 protocols using apc conjugated ccr2

1

Aortic Cell Isolation and Flow Cytometry

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Descending aortas from the aortic arch to femoral bifurcations were microdissected and digested in an enzyme solution containing 60 U ml−1 DNase I, 60 U ml−1 Hyalronidase, 450 U ml−1 Collagenase I and 125 U ml−1 Collagenase XI (all enzymes from Sigma-Aldrich) at 37 °C (ref. 18 (link)). A single-cell suspension was prepared by passing aortic pieces through a strainer for subsequent flow cytometry staining. Isolated aortic cells were antibody stained for the surface markers PE-Cy7-conjugated CD45 (BD Pharmingen), total PerCP-conjugated CD11b (BD Pharmingen), PE-conjugated CD14 (eBioscience, UK), APC-conjugated CCR2 (R&D Systems, UK) with appropriate isotype controls19 (link) (Supplementary Table 5). Absolute cell counts were performed by ratio to a known quantity of calibration beads added to each sample (CaliBrite, BD Pharmingen). Data were acquired using a CyAn Analyser flow cytometer (Beckman Coulter, UK) and then analysed using Summit (Dako, UK) and FlowJo (Tree Star Inc, USA) software.
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2

Aortic Cell Isolation and Characterization

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Descending aortas from the aortic arch to femoral bifurcations were micro-dissected and digested in an enzyme solution containing 60 U/ml DNase I, 60 U/ml Hyalronidase, 450 U/ml Collagenase I and 125 U/ml Collagenase XI (all enzymes from Sigma-Aldrich, UK) at 37°C18 (link). A single cell suspension was prepared by passing aortic pieces through a strainer for subsequent flow cytometry staining. Isolated aortic cells were antibody stained for the surface markers PE-Cy7 conjugated CD45 (BD Pharmingen, UK), total PerCP conjugated CD11b (BD Pharmingen, UK), PE conjugated CD14 (eBioscience, UK), APC conjugated CCR2 (R&D systems, UK) with appropriate isotype controls19 (link)(Supplementary Table 5). Absolute cell counts were performed by ratio to a known quantity of calibration beads added to each sample (CaliBrite, BD Pharmingen, UK). Data was acquired using a CyAn Analyser flow cytometer (Beckman Coulter Ltd, UK) and then analyzed using Summit (Dako, UK) and FlowJo (Tree Star Inc, USA) software.
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3

Hepatic Leukocyte Immunophenotyping by Flow Cytometry

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Freshly isolated hepatic leukocytes (1 Â 10 6 ) were blocked with 2.4G2 (BD Biosciences, San Diego, CA) for 10 minutes before 30 minutes of staining with the following antibodies purchased from BioLegend (San Diego, CA): FITC-conjugated anti-CD19 (1/100 dilution, clone 6D5), PerCP/Cy5.5-conjugated CD11b (1/100 dilution, clone M1/70), AF647-conjugated TIM4 (1/100 dilution, clone RMT4-54), Pacific Blue-conjugated Ly6C (1/ 100 dilution, clone HK1.4), APC-conjugated CD11c (1/100 dilution, clone N418), APC/Cy7-conjugated Ly6G (1/100 dilution, clone 1A8), PE-conjugated F4/80 (1/100 dilution, clone BM8), PE-CF594-conjugated CD3 (1/100 dilution, clone 17A2), and PE/Cy7-conjugated I-A/I-E (1/300 dilution, clone M5/114.15.2). APC-conjugated CCR2 (1/100 dilution, clone 475301) was purchased from R&D Systems (Minneapolis, MN). Live cell events were measured on an LSR Fortessa flow cytometer (BD Biosciences) and analyzed with FlowJo software version 10 (Tree Star, Ashland, OR). The absolute number of each cell type was calculated by multiplying the frequency by the total number of viable hepatic leukocytes per liver.
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