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3 protocols using anti cd28 37

1

Isolation and Expansion of Lymphocytes

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Lymph nodes were passed through a 30-μm cell strainer (Sysmex, #04-004-2326) and spleens were passed through a 70-μm cell strainer (Greiner Bio-One, #542070), followed by gravity centrifugation (400 rcf, 4 °C, 10 min). Spleen samples underwent erythrocyte lysis with BD Pharm Lyse (BD Biosciences, #555899) or ACK solution (NH4Cl 8.024 mg/l (Merck, #1011451000), KHCO3 1.001 mg/l (Merck, #1048540500), EDTA.Na2·2H2O 3.722 mg/l (Merck, #1084181000)).
In retroviral transduction experiments, B cells were depleted from the cell suspensions using the Dynabeads B220 depletion kit (Thermo Fisher, #11441D). The remaining T cells were cultured in the presence of 0.5 μg/ml anti-CD3 (500A2, Invitrogen, #16-0033-86) and anti-CD28 (37.51, Invitrogen, #16-0281-86) stimulating antibodies in complete DMEM (Sigma-Aldrich, #D5671) (supplemented with 2 mM L-Glutamine (Sigma-Aldrich, #G7513), 100 μg/ml Penicillin/Streptomycin (Sigma-Aldrich, #4333), 36 mg/l Asparagine (Sigma-Aldrich, #A4284), 1 mM Sodium-Pyruvate (Sigma-Aldrich, #8636), 10 ml/l Non-essential amino acids (Sigma-Aldrich, #M7145), 4 μl/l β-Mercaptoethanol (Merck KGaA, #805740) and 10% fetal calf serum (Sigma-Aldrich, #S0615)).
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2

Isolation and Expansion of Lymphocytes

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Lymph nodes were passed through a 30-μm cell strainer (Sysmex, #04-004-2326) and spleens were passed through a 70-μm cell strainer (Greiner Bio-One, #542070), followed by gravity centrifugation (400 rcf, 4 °C, 10 min). Spleen samples underwent erythrocyte lysis with BD Pharm Lyse (BD Biosciences, #555899) or ACK solution (NH4Cl 8.024 mg/l (Merck, #1011451000), KHCO3 1.001 mg/l (Merck, #1048540500), EDTA.Na2·2H2O 3.722 mg/l (Merck, #1084181000)).
In retroviral transduction experiments, B cells were depleted from the cell suspensions using the Dynabeads B220 depletion kit (Thermo Fisher, #11441D). The remaining T cells were cultured in the presence of 0.5 μg/ml anti-CD3 (500A2, Invitrogen, #16-0033-86) and anti-CD28 (37.51, Invitrogen, #16-0281-86) stimulating antibodies in complete DMEM (Sigma-Aldrich, #D5671) (supplemented with 2 mM L-Glutamine (Sigma-Aldrich, #G7513), 100 μg/ml Penicillin/Streptomycin (Sigma-Aldrich, #4333), 36 mg/l Asparagine (Sigma-Aldrich, #A4284), 1 mM Sodium-Pyruvate (Sigma-Aldrich, #8636), 10 ml/l Non-essential amino acids (Sigma-Aldrich, #M7145), 4 μl/l β-Mercaptoethanol (Merck KGaA, #805740) and 10% fetal calf serum (Sigma-Aldrich, #S0615)).
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3

Murine T Cell Isolation and Transduction

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Lymph nodes and spleens were passed through a 40-μm cell strainer (Greiner Bio-One), followed by gravity centrifugation (400 g, 4 °C, 5 min). Blood was drawn from the heart into a syringe that had been flushed with heparin (5,000 U/mL) (Sigma-Aldrich) in PBS. Spleen and blood samples underwent erythrocyte lysis with ACK solution [NH4Cl 8.024 mg/l (Merck), KHCO3 1.001 mg/l (Merck), and EDTA.Na2·2H2O 3.722 mg/l (Merck)].
For retroviral T cell transduction experiments, B cells from lymph nodes and spleens were first depleted from the cell suspensions using the Dynabeads B220 depletion kit (Thermo Fisher). The remaining T cells were then cultured in the presence of 0.5 μg/mL anti-CD3 (500A2, Invitrogen) and anti-CD28 (37.51, Invitrogen)-stimulating antibodies in complete DMEM (Sigma-Aldrich) [supplemented with 2 mM L-Glutamine (Sigma-Aldrich), 100 μg/mL Penicillin/Streptomycin (Sigma-Aldrich), 36 mg/l Asparagine (Sigma-Aldrich), 1 mM Sodium-Pyruvate (Sigma-Aldrich), 10 mL/l Nonessential amino acids (Sigma-Aldrich), 4 μL/l β-Mercaptoethanol (Merck KGaA), and 10% fetal calf serum (Sigma-Aldrich)] at a concentration of 2 × 106 cells/ml in a 12-well tissue culture plate (2 mL/well) for 2 d.
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