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3 protocols using cd68 clone y1 82a

1

Immunophenotyping Synovial Tissue Sections

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Frozen synovial tissue sections were fixed in acetone and blocked with 10% goat serum (Dako), followed by incubation with the Biotin blocking system (Dako). Stainings with mAb directed against TNF (clone 52B83; Hycult Biotech), CD45 (clone HI30; BioLegend), CD55 (clone JS11; BioLegend), CD68 (clone Y1/82A; BioLegend), CD90 (clone 5E10; BioLegend), CD163 (clone GHI/61; BioLegend), and vimentin (clone D21H3; Cell Signaling Technology) were performed overnight at 4°C, followed by incubation with Alexa Fluor 488/Alexa Fluor 555–conjugated goat anti-mouse and goat anti-rabbit secondary antibodies. Slides were mounted with Vectashield containing DAPI (Vector Laboratories) and analyzed on a fluorescence imaging microscope (Leica DMRA) coupled to a charge-coupled device camera, with results analyzed using Image-Pro Plus software (Media Cybernetics, Dutch Vision Components).
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2

Immunohistochemical Analysis of Chronic Wounds

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Cryosections (10-μm thick) were cut from human chronic wound biopsies, fixed in cold acetone and blocked with buffer containing 3% BSA. Sections were then incubated overnight with primary antibodies against CD68 (clone Y1/82A, 1:100; Biolegend) and caspase-1 (Millipore). Sections were then incubated with FITC- and tetramethylrhodamine isothiocyanate-conjugated isotype-specific secondary antibodies (1:200; Invitrogen). Negative controls included nonstained slides and isotype-specific control antibodies (IgG1 and IgG2b; Biolegend) along with secondary antibodies. Digital images were obtained using a Nikon Instruments Eclipse 80i microscope with a ×20/0.75 objective, a DS-Fi1 digital camera, and NIS Elements software.
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3

Immunolocalization of IL-23-Positive Cells

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Frozen synovial biopsy tissue sections were used for double staining of IL-23-positive cells. The staining was performed with monoclonal mouse anti-human IL-23 p19 (clone eBio473P19, eBioscience, San Diego, CA, USA) in combination with biotinylated monoclonal antibodies against macrophages (CD68, clone Y1/82A, Biolegend, San Diego, CA, USA) and stromal cells (vimentin, (D21H3) XP™ rabbit monoclonal antibody, Cell Signaling Technology, Danvers, MA, USA). Incubation with the primary antibodies was carried out overnight at 4 °C, followed by incubation with a secondary Alexa Fluor 488-conjugated goat anti-mouse antibody and streptavidin-Alexa Fluor 594 (in case of staining with CD68) and secondary Alexa Fluor 594-conjugated goat anti-rabbit antibody (in case of staining with vimentin) was used. Slides were mounted with Vectashield containing 4′,6-diamidino-2-phenylindole (DAPI) (Vector Laboratories) and analyzed on a fluorescent imaging microscope (Leica DMRA, Wetzlar, Germany) coupled to a CCD camera and Image-Pro Plus software (Media Cybernetics, Dutch Vision Components, Breda, the Netherlands).
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