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3 protocols using anti tnfα clone mp6 xt22

1

Murine and Human T Cell Immunophenotyping

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For murine T cell work, we used the following BD Bioscience antibodies: mouse Fc-Block, anti-CD4 (clone RM4-5), anti-CD8a (clone 53-6.7), anti-IFNγ (clone XMG1.2), and anti-TNFα (clone MP6-XT22). For human T-cell staining, we used the following BD Bioscience antibodies: anti-CD4 (clone RPA-T4), anti-NGFR (clone C40-1457), anti-IFNγ (clone B27), and anti-TNFα (clone MAb11). The anti-CD8a clone OKT8 from eBiosciences was also used. Recombinant human HER2-Fc (R&D Systems) was used to stain for HER2-CAR expression on both murine and human T cells and detected with goat-anti-human IgG (Jackson ImmunoResearch, West Grove, PA). Intracellular staining were performed using the cytofix/cytoperm reagent and associated protocol (BD Biosciences). T-cell viability was evaluated using the Molecular Probes LIVE/DEAD Fixable Near-IR kit (Life Technologies). Results were acquired on a FACSCanto or LSRII (BD Biosciences) and analyzed using FlowJo software (FlowJo, Ashland, OR).
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2

Cytokine Profiling of Mouse Splenocytes Exposed to SARS-CoV-2 Peptides

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The mouse splenocytes were stimulated at 37 °C for 20 h with or without the PepMixTM SARS-CoV-2(S-RBD) peptide pool (JPT Peptide Technology, Berlin, Germany) (2 µg/mL) in the presence of 10 μg/mL brefeldin A (BD Biosciences, San Jose, CA, USA). Cells were stained with a yellow LIVEDEAD fixable dead cell stain kit (Invitrogen, Waltham, MA, USA) and anti-CD3 (Clone 500A2, BD), anti-CD4 (Clone RM4-5, BD), and anti-CD8 (Clone 53-6.7, BD) antibodies. The cells were subsequently fixed and permeabilized using the Cytofix/Cytoperm kit (BD Biosciences, San Jose, CA, USA) and stained with anti-TNF-α (clone MP6-XT22, BD, 1:100) and anti-IL-2 (JES6-5H4, BD, 1:100) antibodies. The cells were acquired on a CytoFLEX (Beckman Coulter, Brea, CA, USA) and analyzed with Flowjo software (Tree Star, Ashland, OR, USA).
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3

Cytokine Analysis in Murine Spleen Cells

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Spleen cells from different groups of BALB/c mice were analyzed for cytokine content as previously described [48 (link)]. Briefly, T cells were seeded at 106/mL in RPMI 1640–10% FBS, and stimulated with 10 ng/mL phorbol 12-myristate 13-acetate (PMA, Sigma-Aldrich) and 500 ng/mL ionomycin (Sigma-Aldrich) in the presence of monensin (BD) during 4-h incubation at 37 °C, and then treated with Cytofix/Cytoperm fixation and permeabilization kit (BD). For macrophage stimulation, spleen cells were seeded at 106/mL in RPMI 1640–10% FBS, and stimulated with LPS 100 ng/mL (Sigma-Aldrich) in the presence of monensin during 4 h incubation at 37 °C. The permeabilized cells were intracellularly stained with the PE-conjugated cytokine-specific mAbs anti-IFNγ (clone XMG1.2), and anti-TNFα (clone MP6-XT22), all from BD; or isotype-matched irrelevant mAbs from BioLegend.
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