Isolement et caractérisation de neutrophiles avec des propriétés anti-tumorales

1Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel-Canada, Hebrew University Medical School, 2Institute of Pulmonary Medicine, Hadassah-Hebrew University Medical Center
Immunology and Infection

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Sionov, R. V., Assi, S., Gershkovitz, M., Sagiv, J. Y., Polyansky, L., Mishalian, I., et al. Isolation and Characterization of Neutrophils with Anti-Tumor Properties. J. Vis. Exp. (100), e52933, doi:10.3791/52933 (2015).

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Abstract

Les neutrophiles, les plus abondants de tous les globules blancs dans la circulation humaine, jouent un rôle important dans la défense de l'hôte contre les micro-organismes envahissants. De plus, les neutrophiles jouent un rôle central dans la surveillance immunitaire des cellules tumorales. Ils ont la capacité de reconnaître des cellules tumorales et induire la mort des cellules tumorales, soit par un mécanisme de contact cellule-dépendant impliquant le peroxyde d'hydrogène ou par cytotoxicité à médiation cellulaire dépendante des anticorps (ADCC). Les neutrophiles ayant une activité anti-tumeur peut être isolé à partir du sang périphérique de patients atteints de cancer et des souris porteuses de tumeurs. Ces neutrophiles sont appelés neutrophiles tumorales entraînées (RTE) pour les distinguer des neutrophiles de sujets en bonne santé ou de souris naïves qui montrent pas d'activité cytotoxique significative de la tumeur. En comparaison avec d'autres globules blancs, des neutrophiles montrent flottabilité différente ce qui rend possible l'obtention d'un> 98% de la population de neutrophiles pur lorsqu'il est soumis à un gradient de densité. Cependant, en pluspour la population de neutrophiles à haute densité normale (HDN), chez les patients atteints de cancer, chez des souris porteuses de tumeurs, ainsi que dans des conditions inflammatoires chroniques, les populations de neutrophiles basse densité distincts (LDN) figurent dans la circulation. LDN co-purifient avec la fraction mononucléaire et peut être séparé à partir des cellules mononucléaires en utilisant soit des stratégies de sélection positive ou négative. Une fois que la pureté des neutrophiles isolés est déterminée par cytométrie de flux, ils peuvent être utilisés pour in vitro et in vivo des essais fonctionnels. Nous décrivons des techniques de surveillance de l'activité anti-tumorale de cellules neutrophiles, de leur capacité à migrer et à produire des espèces réactives de l'oxygène, ainsi que le suivi de leur capacité de phagocytose ex vivo. Nous décrivons en outre des techniques d'étiqueter les neutrophiles pour le suivi in vivo, et de déterminer leur capacité anti-métastatique in vivo. Toutes ces techniques sont essentielles pour comprendre comment obtenir et caractériser les neutrophiles avec anti-tumeurfonction.

Materials

Name Company Catalog Number Comments
CELL LINES
Mouse 4T1 breast carcinoma cells ADCC CRL-2539 Growth medium: DMEM + 10 % heat-inactivated FBS
PLASTIC WARES AND EQUIPMENTS
24-well Tissue Culture Plate  Falcon 353047 Sterile
100 mm Tissue Culture Plate  Corning 430167 Sterile
25 cm2 Tissue Culture Flask Nunc 156340 Sterile
90 mm Bacterial Grade Culture Dish  Miniplast, Ein Shemer, Israel 20090-01-017 Sterile
15 ml Sterile Conical Centrifuge Tube  Miniplast, Ein Shemer, Israel 835015-40-111 Sterile
50 ml Sterile Conical Centrifuge Tube  Miniplast, Ein Shemer, Israel 835050-21-111 Sterile
Falcon 12 x 75 mm Round-Bottom Polystyrene Tube  Becton Dickinson 352058 Sterile
Millicell 24 Migration Plate with a pore size of 5μm  Merck Millipore PSMT010R1 Sterile
White 96-Flat-Bottom Well Plate  Costar 3917 Sterile
Cell Strainer (40 mm)  BD Falcon 352340 Sterile
20G x 1.5" Needle BD Microlance 3  301300 Sterile
23G x 1" Needle  BD Microlance 4 300800 Sterile
25G x 5/8" Needle  BD Microlance 5 300600 Sterile
0.3 ml Syringe with a 30G x 8mm Needle BD Micro-Fine Plus Demi 320829 Sterile
9 mm Clips  BD, AutoClip  427631 Sterile
EasySep Magnet  STEMCELL Technologies 18000
MACS LS Separation Column  Miltenyi Biotech 130-042-201 Sterile
MidiMACS Separator Magnet Miltenyi Biotech 130-042-302
MACS MultiStand Miltenyi Biotech 130-042-303
Microscope Glass Slide  Menzel-Gläser Superfrost  Plus Thermo J1800AMNZ
Orbital Shaker  Sky line, ELMI S-3.02.10L
Plate Reader  TECAN InfiniteF200Pro
POWDER
Bovine serum albumin (BSA), fraction V Sigma A7906
Bromodeoxyuridine (BrdU)  BD Pharmingen 550891 Sterile
CFSE (5-(and 6-)-Carboxyfluorescein diacetate, succinimidyl ester) Molecular Probes C1157
Dextran T500 Sigma 31392
Heparin sodium salt from porcine intestinal mucosa  Sigma H3149
Sodium azide (NaN3) Sigma S8032 Highly toxic, handle with care
Thioglycollate powder  Difco 225650
Zymosan A Sigma Z4250
MEDIA AND SUPPLEMENTS
Dulbecco's modified Eagle medium (DMEM) Sigma D5796 Sterile
Opti-MEM® I reduced serum medium  Life Technologies 31985062 Sterile
Roswell Park Memorial Institute (RPMI)-1640 medium Sigma R8758 Sterile
Foetal bovine serum (FBS), heat-inactivated Sigma F9665 Sterile
L-Glutamine Biological Industries, Beth HaEmek, Israel 03-020-1A Sterile
Sodium pyruvate Biological Industries, Beth HaEmek, Israel 03-042-1B Sterile
Penicillin Streptomycin x 1000 solution Biological Industries, Beth HaEmek, Israel 03-031-5 Sterile
Phosphate buffered saline (PBS) without Mg2+ and Ca2+  Biological Industries, Beth HaEmek, Israel 02-023-1 Sterile
PBS x 10 without Ca2+ and Mg2+  Biological Industries, Beth HaEmek, Israel 02-023-5A Sterile
HPLC grade water  J.T. Baker 4218-03 Autoclave
SOLUTIONS
ACK – Ammonium-Chloride-Potassium Life Technologies  A10492-01
Bromodeoxyuridine (BrdU) solution (10 mg/ml) in PBS Dissolve 10 mg of BrdU in 1 ml PBS and sterile filter.
CFSE, 5 mM in DMSO Dissolve 2.8 mg of CFSE in 1 ml DMSO. Divide into 10 ml aliquots in sterile 200 ml tubes and store in the dark at -20oC.
Eosin Y solution Sigma HT110-2-32
Hanks' balanced salt solution Biological Industries, Beth HaEmek, Israel 02-016-1A Sterile
Heparin, 20 mg/ml in PBS Dissolve 100 mg Heparin in 5 ml sterile PBS, and sterile filter through a 0.2 mm filter. 
Histopaque-1119  Sigma 11191 Sterile filter through a 0.2 mm filter.
Histopaque-1077  Sigma 10771 Sterile filter through a 0.2 mm filter.
Luciferase cell culture lysis buffer x5 Promega E153A Dilute 1:5 in sterile water just before use.
Luciferase assay solution Promega E1501 Contains luciferase assay substrate powder (E151A) and luciferase assay buffer (E152A)
Mayer's Hematoxylin solution  Sigma MHS-32
PBS + 0.5% BSA Dissolve 2.5 g BSA in 500 ml PBS, and sterile filter through a 0.2 mm filter.
PBS + 1% BSA Dissolve 1g BSA in 100 ml PBS, and sterile filter through a 0.2 mm filter.
5x PBS with 2.5% BSA Dissolve 12.5g BSA in a mixture of 250 ml sterile HPLC-grade water and 250 ml PBSx10, and sterile filter through a 0.2 mm filter.
PBS containing 0.5% BSA and 2 mM EDTA Dissolve 250 mg BSA in 50 ml sterile PBS and add 200 ml of 0.5M EDTA pH 8.0, sterile filter through a 0.2 mm filter.
FACS buffer (PBS containing 0.5% BSA, 2 mM EDTA and 0.02% NaN3) Dissolve 250 mg BSA in 50 ml sterile PBS  and add 200 ml of 0.5M EDTA pH 8.0 and 500 ml of 2% NaN3, sterile filter through a 0.2 mm filter.
Saline (0.9% NaCl) Dissolve 9 g NaCl in 1,000 ml ddw, autoclave
0.2% NaCl solution Dissolve 2 g NaCl in 1,000 ml ddw, autoclave
1.6% NaCl solution Dissolve 16 g NaCl in 1,000 ml ddw, autoclave
2 % Sodium azide Dissolve 1g sodium azide in 50 ml sterile ddw, keep at 4oC. Highly toxic.
3% Thioglycollate solution                                        Dissolve 3 g of thioglycollate powder in 100 ml ddw.                                        Boil until solution becomes yellow and autoclave.
Trypan blue solution (0.4%) Sigma T8154 Dilute 1:10 in PBS to get a 0.04% solution.
Trypsin solution B  Biological Industries, Beth HaEmek, Israel 03-046-1 Sterile
1 mg/ml Zymosan A Resuspend 1 mg Zymosan A in 1 ml sterile PBS in an Eppendorf tube. Vortex vigorously and incubate the tube at 37 oC for 30 min. Do not autoclave. Prepare the solution freshly before use.
KITS
EasySep PE selection kit STEMCELL Technologies 18557
EasySep PE selection cocktail  STEMCELL Technologies 18151
the EasySep magnetic nanoparticles  STEMCELL Technologies 18150
Anti-Ly6G mouse MicroBead Kit Miltenyi Biotec 130-092-332
EasySep Mouse Neutrophil Enrichment Kit STEMCELL Technologies 19762
EasySep Human Neutrophil Enrichment Kit STEMCELL Technologies 19257
FITC BrdU flow kit BD Pharmingen  559619
MACS Neutrophil isolation kit Miltenyi Biotec 130-097-658
Phagocytosis Assay Kit  Cayman Chemical Company  500290
ANTIBODIES
FcR blocking antibody  Biolegend 101302
Purified rat anti-Ly6G antibody  BD Pharmingen  551459 Clone 1A8
PE-conjugated rat anti-mouse Ly6G antibody  Biolegend 127608 Clone 1A8
FITC-conjugated rat anti-mouse Ly6G BD Pharmingen  551460 Clone 1A8
PerCP-Cy5.5 rat anti-mouse Ly6G  TONBO Biosciences 65-1276 Clone 1A8
violetFluor 450-conjugated rat anti-mouse Ly6G  TONBO Biosciences 75-1276 Clone 1A8
FITC-conjugated rat anti-mouse CD11b BD Pharmingen  553310 Clone M1/70
FITC-conjugated rat anti-mouse Ly-6G and Ly-6C (GR-1) BD Pharmingen  553127 Clone RB6-8C5
PE-conjugated rat anti-mouse CD45 BD Pharmingen  553081 Clone 30-F11
FITC-conjugated rat anti-mouse F4/80  Abcam ab60343 Clone BM8
FITC-conjugated mouse anti-human CD66b  Biolegend 305103 Clone G10F5
Purified rat isotype control antibody (IgG2a, k)  BD Pharmingen  553927 Clone R35-95
LEAF purified Armenian hamster anti-mouse CD3e antibody BioLegend 100314 Clone 145-2C11

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