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4 protocols using mouse anti human cd107a

1

Detecting SARS-CoV-2-specific T cells

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The ICS assay adapted to study SARS-CoV-2-specific T cells was previously described (Tauzin et al., 2021b (link)). PBMCs were thawed and rested for 2 h in RPMI 1640 medium supplemented with 10% FBS, Penicillin-Streptomycin (Thermo Fisher scientific, Waltham, MA) and HEPES (Thermo Fisher scientific, Waltham, MA). 1.7×106 PBMCs were stimulated with a S glycoprotein peptide pool (0.5 μg/mL per peptide from JPT, Berlin, Germany) corresponding to the pool of 315 overlapping peptides (15-mers) spanning the complete amino acid sequence of the S glycoprotein.
Cell stimulation was carried out for 6h in the presence of mouse anti-human CD107a, Brefeldin A and monensin (BD Biosciences, San Jose, CA) at 37 °C and 5% CO2. DMSO-treated cells served as a negative control, and SEB as positive control. Cells were stained for Aquavivid viability marker (Thermo Fisher scientific, Waltham, MA) for 20 min at 4 °C and surface markers (30 min, 4 °C), followed by intracellular detection of cytokines using the IC Fixation/Permeabilization kit (Thermo Fisher scientific, Waltham, MA) according to the manufacturer’s protocol before acquisition on a Symphony flow cytometer (BD Biosciences) and analysis using FlowJo v10.8.0 software. Abs used are listed in the Table S3.
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2

Evaluating ZIKV-specific PBMC Responses

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Cryopreserved PBMCs were thawed, washed and rested overnight at 37° ± 5% CO2. CEM‐NKR‐expressing ZIKV NS1 or DC‐SIGN (negative control) was left in media or incubated with anti‐Zika virus NS1 antibody (B4) or plasma samples at different dilutions for 1 h at 4°. PBMCs were counted, added to the culture and incubated at 37° ± 5% CO2 in the presence of mouse anti‐human CD107a (BD 555800) and CD107b (BD 555804). After 1h, BD GolgiPlug™ (BD 555029) and GolgiStop™ (BD 554724) were added to the wells and incubated at 37° ± 5% CO2 for another 3 h. Cells were washed and stained with surface Abs anti‐CD3, CD16, CD56 and CD69 for 30 min. Cells were washed, fixed with BD Cytofix™ and acquired on a BD LSR™ II flow cytometer or washed and resuspended in BD Cytofix/Cytoperm™ for 20 min at 4°. The cells were then washed with BD Perm/Wash™ and stained with anti‐IFN‐γ for 30 min at 4°. The cells were washed with BD Perm/Wash™ and fixed with BD Cytofix™. Samples were acquired on a BD LSR™ II flow cytometer, and the data were analysed using the FlowJo software.
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3

Characterizing S Glycoprotein-Specific T Cell Responses

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PBMCs were thawed and rested for 2ch in RPMI 1640 medium supplemented with 10% FBS, Penicillin-Streptomycin (Thermo Fisher scientific, Waltham, MA) and HEPES (Thermo Fisher scientific, Waltham, MA). 2 × 106 PBMCs were stimulated with a S glycoprotein peptide pool (0.5 μg/mL per peptide from JPT, Berlin, Germany) corresponding to the pool of 315 overlapping peptides (15-mers) spanning the complete amino acid sequence of the S glycoprotein.
Cell stimulation was carried out for 6 h in the presence of mouse anti-human CD107A, Brefeldin A and monensin (BD Biosciences, San Jose, CA) at 37°C and 5% CO2. DMSO-treated cells served as a negative control. Cells were stained for aquavivid viability marker (Thermo Fisher scientific, Waltham, MA) for 20cmin at 4°C and surface markers (30cmin, 4°C), followed by intracellular detection of cytokines using the IC Fixation/Permeabilization kit (Thermo Fisher scientific, Waltham, MA) according to the manufacturer’s protocol before acquisition on a Symphony flow cytometer (BD Biosciences, San Jose, CA). Abs used are listed in the Table S2. Stained PBMCs were acquired on Symphony cytometer (BD Biosciences) and analyzed using FlowJo v10.7.1 software.
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4

SARS-CoV-2 T Cell Response Assay

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The ICS assay adapted to study SARS-CoV-2-specific T cells was previously described (Tauzin et al., 2021b (link)). PBMCs were thawed and rested for 2 h in RPMI 1640 medium supplemented with 10% FBS, Penicillin-Streptomycin (Thermo Fisher scientific, Waltham, MA) and HEPES (Thermo Fisher scientific, Waltham, MA). 1.7×106 PBMCs were stimulated with a S glycoprotein peptide pool (0.5 μg/mL per peptide from JPT, Berlin, Germany) corresponding to the pool of 315 overlapping peptides (15-mers) spanning the complete amino acid sequence of the S glycoprotein.
Cell stimulation was carried out for 6 h in the presence of mouse anti-human CD107a, Brefeldin A and monensin (BD Biosciences, San Jose, CA) at 37°C and 5% CO2. DMSO-treated cells served as a negative control, and SEB as positive control. Cells were stained for Aquavivid viability marker (Thermo Fisher scientific, Waltham, MA) for 20 min at 4°C and surface markers (30 min, 4°C), followed by intracellular detection of cytokines using the IC Fixation/Permeabilization kit (Thermo Fisher scientific, Waltham, MA) according to the manufacturer’s protocol before acquisition on a Symphony flow cytometer (BD Biosciences) and analysis using FlowJo v10.8.0 software. Abs used are listed in the Table S3.
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