Staining was performed on peritoneal exudate cells using the following anti-mouse antibodies and flurorochrome conjugates: anti-CD4 with Biotin (Miltenyi Biotec), anti-CD25 with PE (eBioscience) and anti-Foxp3 with APC (Miltenyi Biotec). Secondary staining for biotinylated CD4 was done with either FITC- or Pe-Cy5-conjugated streptavidin (BD Biosciences). As isotype control of activated/regulatory T-cells, mouse IgG1 K isotype (APC, Miltenyi Biotec) and Rat IgG1 K Isotype (PE, eBioscience) were used. The staining procedure was executed as previously described (6 (link)) and results acquired on a cytometer (FACSCaliburTM, Beckton Dickinson) and analyzed on FlowJo software (Tree Star, United States).
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