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4 protocols using anti ly6c

1

Gd-DTPA-Induced Peritoneal Leukocyte Analysis

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Nine to ten week old male C57BL/6 and Nlrp3−/− mice were injected i.p. with 500 μM Gd-DTPA in phosphate buffered saline (PBS). PBS injected C57BL/6 served as controls. After 24 hours, mice were euthanized and cells were collected from the peritoneal cavity. Cells were stained for flow cytometry with anti-CD11b, anti-Ly6G (BD Biosciences, San Jose, CA, USA), and anti-Ly6C (AbDSerotec, Raleigh, NC, USA), recorded on a LSRII (BD Biosciences) and analyzed with FlowJo software (TreeStar Inc., Ashland, OR, USA).
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2

Multiparametric Flow Cytometry of Immune Cells

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Spleens were sieved (70 µm), before washing [phosphate-buffered saline (PBS); 350 g, 5
min], re-sieving (40 µm), RBC lysis (eBioscience), washing, and resuspension in FACS
buffer (1% BSA, 0.05% NaN3, in PBS) or full RPMI 1640. Cells in FACS buffer
were Fc blocked (1:100; BioLegend; 10 min, RT) before staining for T-cell activation with:
anti-CD4 (1:800; eBioscience), anti-CD8 (1:100), anti-CD62L (1:80), anti-CD44 (1:400; all
BioLegend; 20 min, RT); or for Tregs with: anti-CD4 (1:800), anti-CD25 (1:80; BioLegend;
20 min, RT), before washing, fixation, permeabilization (FOXP3 Fix/Perm; BioLegend), then
anti-FOXP3 (1:20; BioLegend; 30 min, RT). Splenocytes in RPMI were treated
±ionomycin/phorbol 12-myristate 13-acetate/brefeldin A (1:500; BioLegend), incubated (5 h,
37°C), washed, resuspended in FACS buffer, Fc blocked, stained with anti-CD4 or anti-CD8
(20 min, RT), washed, fixed, permeabilized (BioLegend), then anti-IL-10, anti-IL-17, and
anti-interferon γ (IFNγ; all 1:100; BioLegend; 30 min, RT). For neutrophil, monocyte or
Ly6C+ cells, whole blood (ethylenediaminetetraacetic acid) was stained with
anti-CD115 (1:100; eBioscience), anti-CD11b (1:800), anti-Ly6G (1:80; both BioLegend),
anti-Ly6C (1:400; AbD Serotec, Hercules, CA), at RT for 30 min, before RBC lysis, washing,
and analysis by flow cytometry (Accuri C6).
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3

Immunophenotyping Murine Splenocytes

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Spleens were sieved (70 µm), before washing [phosphate-buffered saline (PBS); 350 g, 5 min], re-sieving (40 µm), RBC lysis (eBioscience), washing, and resuspension in FACS buffer (1% BSA, 0.05% NaN3, in PBS) or full RPMI 1640. Cells in FACS buffer were Fc blocked (1:100; BioLegend; 10 min, RT) before staining for T-cell activation with: anti-CD4 (1:800; eBioscience), anti-CD8 (1:100), anti-CD62L (1:80), anti-CD44 (1:400; all BioLegend; 20 min, RT); or for Tregs with: anti-CD4 (1:800), anti-CD25 (1:80; BioLegend; 20 min, RT), before washing, fixation, permeabilization (FOXP3 Fix/Perm; BioLegend), then anti-FOXP3 (1:20; BioLegend; 30 min, RT). Splenocytes in RPMI were treated ±ionomycin/phorbol 12-myristate 13-acetate/brefeldin A (1:500; BioLegend), incubated (5 h, 37°C), washed, resuspended in FACS buffer, Fc blocked, stained with anti-CD4 or anti-CD8 (20 min, RT), washed, fixed, permeabilized (BioLegend), then anti-IL-10, anti-IL-17, and anti-interferon γ (IFNγ; all 1:100; BioLegend; 30 min, RT). For neutrophil, monocyte or Ly6C+ cells, whole blood (ethylenediaminetetraacetic acid) was stained with anti-CD115 (1:100; eBioscience), anti-CD11b (1:800), anti-Ly6G (1:80; both BioLegend), anti-Ly6C (1:400; AbD Serotec, Hercules, CA), at RT for 30 min, before RBC lysis, washing, and analysis by flow cytometry (Accuri C6).
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4

Histological Evaluation of Liver Fibrosis

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Hepatic histology was evaluated on 4-μm sections of 4% p-formaldehyde-fixed liver which were blocked in paraffin wax and stained with Hematoxylin and Eosin (H&E), Masson's Trichrome or Sirius Red. The stage of fibrosis was scored in a blinded manner by an experienced pathologist using a four-point severity scale (0, normal; 1, mild; 2, moderate; 3, severe) for necrosis, inflammatory cell infiltration, bile duct hyperplasia and fibrosis [34 (link)]. Bile infarcts were quantified in H&E-stained sections and the percentage of the focal necrosis surface to the whole liver section area was assessed. Liver immunohistochemistry was performed as previously described [26 (link)]. Random fields (4 per mice) were chosen for quantification of immunostained positive cells. The antibodies used were anti-F4/80 (MCA497, Serotec), anti-Ly6C (provided by A. Castrillo, CSIC, Spain) and anti-α-SMA (A2547, Sigma).
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