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2 protocols using anti shp 2

1

Quantifying T-Cell Activation Signaling

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CD4+ T cells, Teffs or Tregs (105 cells per well) were incubated for 30 min at room temperature with BT-061, OKT-3, RPA-T4, SK3, QS4120, B-A1, MT441, MT310, EDU-2 or OKT-4 (1 μg ml−1). The mAbs were cross-linked for 5, 10, 30 or 60 min at 37 °C either by anti-human IgG (20 μg ml−1) (Life Technologies) or anti-mouse IgG (amIgG) (10 μg ml−1) (Thermo Scientific, Waltham, MA, USA). For intracellular staining, cells were treated with fixation buffer, permeabilized with perm buffer III and stained with anti-Zap-70 (pY319)/Syk (pY352), anti-PLC-γ2 (pY759), anti-ERK1/2 (pT202/pY204), anti-NF-κB p65 (pS529), anti-PKCα (pT497), anti-p38 MAPK (pT180/pY182), anti-Btk (pY551)/Itk (pY511), anti-MEK1 (pS298), anti-Pyk2 (pY402), anti-SLP-76 (pY128), anti-Lck (pY505), anti-Akt (pS473), anti-LAT (pY226), anti-JNK (pT183/pY185), anti-SHP-2 (pY542) or anti-IKKγ (pS376) according to the manufacturer's instructions (all BD Phosflow, San Jose, CA, USA) before being analyzed on a FACS Canto II. Fold induction was calculated by dividing the mean fluorescence intensity of the measured value by the mean fluorescence intensity of the untreated control.
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2

Immunostaining and Flow Cytometry Protocol

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Biotin anti-human CD3ε (clone OKT3, BioLegend, #317320), human PD-L1-His (Sino Biological, #10084-H08H), human ICAM-1-His (Sino Biological, #10346-H08H), and streptavidin (Invitrogen, #S888) were used to functionalize SLBs. Anti-Shp1 (Life Technologies, #3H20L13), anti-Shp2 (BD Biosciences, #101720), and F (ab') 2-Goat anti-Rabbit IgG (H+L) secondary antibody, alexa fluor 568 (Invitrogen, #A21069) were used in the immunostaining for the cell-SLB assays. Anti-Phosphotyrosine (clone pY20, Sigma-Aldrich, #P4110-1MG), anti-GFP (Invitrogen, #A-6455), Anti-Shp1 (Proteintech, #24546-1-AP), anti-Shp2 (Santa Cruz Biotechnology, #sc-7384), and Anti-GAPDH (Proteintech, #10494-1-AP) were used in western blots. Phycoerythrin (PE) anti-human BTLA (clone MIH26, BioLegend, #344505) and Pacific Blue anti-human PD-1 (clone EH12.2H7, BioLegend, #329916), were used in the staining of Jurkat or Raji cells for flow cytometry.
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