Ex Vivo T Cell Stimulation in the Pancreatic Tumor: A Method to Increase Cytokine Production in T Cells

Published: April 30, 2023

Abstract

Source: Spear, S., et al. Generation of Orthotopic Pancreatic Tumors and Ex vivo Characterization of Tumor-Infiltrating T Cell Cytotoxicity. J. Vis. Exp.(2019).

This article describes the technique for ex vivo T cell stimulation to increase the intracellular concentration of cytokines such as interferon-gamma or IFN-gamma and tumor necrosis factor-alpha or TNF-alpha in the T cell. These cytokines  mediate an effective anti-tumor response and can have a therapeutic role in the tumor. 

Protocol

1. Digestion of pancreatic tumors Place the dissected pancreatic tumor, metastatic site tumors, or healthy pancreatic tissue in ice-cold PBS, and store on ice. Use forceps to transfer the tumor onto a Petri dish. Add 5.0 mL of digestion medium (2 mg/mL Collagenase, 0.025 mg/mL DNase RPMI) into a 50 mL tube; store on ice to prevent enzyme activity commencing. NOTE: This protocol uses Collagenase Type V, which has an activity of ≥1 units/mg FALGPA and > …

Açıklamalar

The authors have nothing to disclose.

Materials

70 μm pore-size cell strainer Fisher Scientific 11597522
anti-CD107a PE (clone 1D4B) Biolegend 121612 1:100 to culture media
Bovine Serum Albumin (BSA) Sigma-Aldrich A4503
Cell Stimulation Cocktail (500x) (phorbol 12-myristate 13-acetate (PMA) and ionomycin) eBioscience 00-4970-03 x Final concentration PMA 0.081 μM, ionomycin 1.34 μM
THP1 Human Monocytic Leukemia Cells ATCC TIB-202
Collagenase Type V from Clostridium histolyticum Sigma-Aldrich C9263 2 mg/mL in media
Dimethyl sulphoxide (DMSO) Sigma-Aldrich D2650-100mL
DNase (Deoxyribonuclease I from bovine pancreas Type II-S) stock 10 mg/mL in 0.15 M NaCl Sigma-Aldrich D4513 Final concentration in digestion media 0.025 mg/mL
Foetal calf-serum (FCS) GE Healthcare A15-104 10% in RPMI
Hamilton syringe 700 series, 25 μL volume, 22s gauge needle bevel tip Fisher Scientific 10100332
Penicillin/streptomycin PAA 15140122 100 units/mL Penicillin, 100 μg/mL Streptomycin
Protein transport inhibitor cocktail (500x) (brefeldin A and monesin) eBioscience 00-4980-03 1x Final concentration Brefeldin A 10.6 μM, monensin 2 μM
RPMI-1640 (containing 0.3 g/L Glutamine) Sigma-Aldrich R8758
Surgical Scalpel Blade No.10 Swann-Morton 501
Trypsin-EDTA Solution 10x Sigma-Aldrich 594-18C Trypsin (0.1%) EDTA (0.4%) final concentration
U-bottomed 96 microwell plate VWR 734-2080

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Ex Vivo T Cell Stimulation in the Pancreatic Tumor: A Method to Increase Cytokine Production in T Cells. J. Vis. Exp. (Pending Publication), e20306, doi: (2023).

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