Publication protocol
Tumors tissues were harvested from mice that had been treated with mAb or otherwise and processed for flow cytometry analysis as previously described (20). For surface staining, tumor-filtrating leukocytes (TIL) were stained with eFluor780 anti-CD45.2 (104; eBioscience), eFluor450 or Brilliant Violet 605 anti-CD4 (RM4-5; eBioscience and Biolegend), PE-Cy7 or Brilliant Violet 421 anti-CD8a (53-6.7; eBioscience and Biolegend), FITC or PE anti-TCRβ (H57-597; eBioscience), PE-Cy7-anti-CD11b (M1/70; eBioscience), eFluor450-anti-Gr1 (RB6-8C5; eBioscience), FITC- or PE-anti-PD1 (J43; eBioscience and BD Pharmingen), APC-anti-PDL1 (10F.9G2; Biolegend), PE-anti-CD27 (LG.3A10; BD Pharmingen), PE-anti-CD86 (GL1; BD Pharmingen), APC-anti-CD80 (16-10A1; eBioscience), PE-anti-CD70 (FR70; BD Pharmingen), FITC-anti-CD40 (HM40-3; BD Pharmingen), Biotin-conjugated-anti-CD28 (37.51; Biolegend), PE-Cy7- or APC-conjugated streptavidin (eBioscience), Alexa Fluor 488-anti-CD25 (PC61.5; eBioscience), Brilliant Violet 605-anti-CD127 (A7R34; Biolegend), PE-Cy7-anti-CD278 (ICOS; 7E.17G9; eBioscience), APC-anti-CD223 (Lag3; C9B7W; Biolegend), PE-anti-CD366 (Tim3; RMT3-23; Biolegend), APC-anti-TIGIT (1G9; Biolegend), PE-Cy7 anti-CD39 (24DMS1; eBioscience), PE-anti-CD73 (TY/23; BD Pharmingen), APC-anti-CD44 (IM7; Biolegend), FITC-anti-CD62L (MEL-14; Biolegend), and respective isotype antibodies in the presence of anti-CD16/32 (2.4G2). 7AAD (Biolegend) or Zombie Aqua Fixable Viability Kit (Biolegend) was used to exclude dead cells. For intracellular transcription factor staining, surface-stained cells were fixed and permeabilized using the Foxp3/Transcription Factor Staining Buffer Set (eBioscience), according to the manufacturer's protocol, and stained using eFluor450-anti-Foxp3 (FJK-16s, eBioscience), FITC-anti-Tbet (4B10; Biolegend), APC-anti-CTLA4 (UC10-4B9, eBioscience), Alexa Fluor 647-anti-Ki67 (B56), eFluor660-anti-Eomes (Dan11mag; eBioscience), and respective isotype antibodies. For intracellular staining of IFNγ/TNF or IL12p40, cells were stimulated in vitro with 50 ng/mL PMA (Sigma Aldrich) and 1 μg/mL ionomycin (Sigma Aldrich), or 100 ng/mL LPS, respectively in the presence of GolgiPlug (BD Biosciences) for 4 hours, and then surface stained as aforementioned. Surface-stained cells were then fixed and permeabilized using BD Cytofix/Cytoperm (BD Biosciences) according to the manufacturer's protocol, and stained with PE-anti-IL12p40 (C15.6; BD Pharmingen), PE-anti-IFNγ (XMG1.2; eBioscience), Alexa Fluor 647-anti-granzyme B (GB11; BD Pharmingen), and Brilliant Violet 605-anti-TNF (MP6-XT22; Biolegend), and respective isotype antibodies. Cells were acquired on the BD FACSCANTO II and LSR (BD Biosciences) and analysis was carried out using FlowJo (Tree Star).
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