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3 protocols using anti cd3

1

Immunofluorescence Analysis of Immune Markers

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The tissue section was prepared as in IHC method. Primary antibodies include anti-GBP5 (Cat. #: 67798, Cell Signaling, United States), anti-CD3 (Cat. #: 60181-1-Ig, Proteintech, China), anti-CD40 (Cat. #: ab280207, Abcam, United States), and anti-CD68 (Cat. #: ARG10514, Arigo, China). Secondary antibodies include Alexa Fluor647 or 488 conjugated goat anti-rabbit or goat anti-mouse antibodies (Invitrogen, United States). Cell nuclei were stained with 4′,6-diamidine-2′-phenylindole dihydrochloride (DAPI, Sigma-Aldrich, United States). Slides were visualized with a TCS-SP8 confocal microscope (Leica, Germany).
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2

Immunohistochemical Analysis of Colonic Tissue

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The tissue samples were stained according to the manufacturer's protocol using an immunohistochemistry kit, and the immunohistochemical images were analyzed and counted by the image pro-Plus 6.0 image analysis system (Media Cybernetics, Inc., Rockville, MD, USA), and the positive expression area and positive expression integral optical density (IOD) was measured. Immunohistochemistry (IHC) was performed on paraffin-embedded colonic tissue sections complying with a standard procedure. 33 Slices were then incubated with specific primary antibodies for anti-AKT, anti-p-AKT, anti-CD3 (1:200, 1:200, 1:500; Proteintech Group, Inc., Wuhan, China) and anti-Foxp3 (1:200; Cell Signaling Technology, Danvers, MA, USA) overnight at 4 , followed by a biotinylated secondary antibody. Sections were developed with diaminobenzidine (DAB) and counterstained with hematoxylin. Images of IHC slides were visualized and analyzed using image pro-Plus 6.0 image analysis system.
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3

Immunohistochemical and Immunofluorescence Analysis of DLBCL

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Immunohistochemistry, as well as immunofluorescence on lymph node biopsies from DLBCL patients, were conducted as outlined previously [26 (link)]. The sections were stained using a primary antibody (anti-MECR, Proteintech, Cat. NO: 51027-2-AP; anti-RAN, Proteintech, Cat. NO: 67500-1-Ig; anti-ARSK, Bioss, Cat. NO: bs-9102R; anti-CD3, Proteintech, Cat. NO: 60181-1-Ig; anti-CD20, Proteintech, Cat. NO: 60271-1-Ig). The nucleus was stained using DAPI (Solarbio, Beijing, China) for use in immunofluorescence. Images of stained slides for these markers were scanned at 400× magnification using an optical microscope (Olympus Co., Tokyo, Japan). Immunohistochemistry results were quantified by counting the area of positive signals using Image J software. Fluorescent images were captured via a confocal laser microscopy system (Leica SP2).
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