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7 protocols using rh il4

1

Isolation and Activation of Immune Cells

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PBMCs were isolated from buffy coats from healthy donors (blood transfusion center at University Medical Center (UMC) Mainz, Germany) by Ficoll®-Hypaque (GE Healthcare) density gradient centrifugation. Monocytes were isolated using anti-CD14 microbeads (Miltenyi Biotec) and CD8 and CD4 cells were isolated using anti-CD8 and anti-CD4 microbeads, respectively (Miltenyi Biotec) according to the manufacturer’s protocol. Immature DCs (iDCs) were differentiated from CD14+ cells in RPMI 1640 GlutaMAX™, 50 IU/mL penicillin, 50 μg/mL streptomycin, and 10% (v/v) human AB serum (one lambda) (denoted huRPMI), supplemented with 1000 IU/mL recombinant human (rh) GM-CSF and 1000 IU/mL rh IL-4 (Miltenyi Biotec) twice in 5 days. For T-cell activation, 2 × 106 / ml of isolated T-cells were cultivated in 24 well tissue culture plates precoated with 2 μg/ml anti-CD3 antibody (clone OKT3; Bioxcell) in huRPMI supplemented with 100 IU/mL IL-2 for 2 to 3 days. Cells were then harvested, washed and resuspended in huRPMI with 50 IU/mL IL-2 and either rested or immediately submitted to further processing steps.
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2

Generation of M0-MDM and MDDC from Monocytes

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Unpolarized human monocyte-derived macrophages (M0-MDM) were generated by culturing freshly isolated monocytes in 24-well plates [1×106 cells/well] with CCM [1 mL] containing recombinant human M-CSF (rhM-CSF, Miltenyi Biotec) [50 ng/mL] for three days, replacing half the media [0.5 mL] from each well with fresh CCM [0.5 mL] and rhM-CSF [50 ng/mL], and incubating for another 3 days 69 (link). Immature human monocytes-derived dendritic cells (MDDC) were generated in the same manner as M0-MDM but incubated with CCM containing recombinant human IL-4 (rhIL-4, Miltenyi Biotec) [50 ng/mL] and recombinant human GM-CSF (Miltenyi Biotec) [160 ng/mL] 70 (link). On Day 7, media was aspirated, cells were washed once with warm, sterile PBS [37°C], and incubated [37°C / 5%CO2] with CCM [1 mL] containing the indicated immunostimulant for 24 h.
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3

In vitro Expansion of Human ILC2s

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Sorted ILC2s (100 cells/well) were expanded with human feeder PBMCs (100,000/well; 37 °C, 5% CO2) for three to five weeks. Culture medium contained RPMI 1640 Glutamax medium (Life Technologies, Darmstadt, Germany), 1% Pen/Strep (Life Technologies, Darmstadt, Germany), 10% h.i. human AB serum (Sigma-Aldrich, Taufkirchen, Germany), and 25 mM 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES, Lonza, Wakersville, USA). The medium was supplemented with 100 U/ml rh-IL-2 (Life Technologies, Darmstadt, Germany), 25 ng/ml rh-IL-4 (Miltenyi Biotech, Bergisch Gladbach, Germany), 5 µg/ml phytohemagglutinin-M (PHA-M; Sigma-Aldrich, Taufkirchen, Germany).
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4

Monocyte-Derived Dendritic Cell Generation

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Human DCs were derived from monocytes isolated from human peripheral blood supplied by the French Blood Bank (EFS, Rungis, France). Healthy donors gave their written consent for the use of blood donation for research purposes. Peripheral blood mononuclear cells (PBMCs) were sorted from buffy coats by density centrifugation on a Ficoll gradient. Monocytes were then isolated through positive magnetic selection using MidiMacs separation columns and anti-CD14+ antibodies coated on magnetic beads (Miltenyi Biotec, Bergisch Gladbach, Germany). Finally, CD14 cells were differentiated in immature MoDCs for 4 days in RPMI 1640 supplemented with GlutaMAX (Gibco, Invitrogen, Saint Aubin, France), 10 % heat-inactivated fetal calf serum (FCS, Gibco, Invitrogen, Saint Aubin, France), 550 U·mL1 granulocyte-macrophage colony-stimulating factor (rh-GM-CSF, Miltenyi Biotec, Bergisch Gladbach, Germany), 550 U·mL1 interleukin-4 (rh-IL4, Miltenyi Biotec, Bergisch Gladbach, Germany), 1 mM sodium pyruvate (Gibco, Invitrogen, Saint Aubin, France), 100 µg·mL1 streptomycin and 100 U·mL1 penicillin (Gibco, Invitrogen, Saint Aubin, France).
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5

Isolation and Differentiation of Human Monocyte-Derived Dendritic Cells

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Human monocyte-derived dendritic cells (moDCs) were derived from monocytes isolated from human peripheral blood supplied by the French Blood Bank (Établissement Français du Sang, Rungis, France). Healthy donors gave their written consent for the use of blood donation for research purposes. Peripheral blood mononuclear cells (PBMCs) were sorted from buffy coats by density centrifugation on a Ficoll gradient. Monocytes were then isolated through positive magnetic selection using MidiMacs separation columns and anti-CD14 antibodies coated on magnetic beads (Miltenyi Biotec, Bergisch Gladbach, Germany). Finally, CD14+ cells were differentiated in immature moDCs for 4 days in RPMI 1640 supplemented with GlutaMAX (Gibco, Invitrogen), 10% heat-inactivated fetal calf serum (FCS, Gibco), 550 U.mL−1 interleukin-4 (rh-IL4, Miltenyi Biotec), 550 U.mL−1 GM-CSF (rh-GM-CSF, Miltenyi Biotech), 1 mM sodium pyruvate (Gibco), 100 µg.mL−1 streptomycin and 100 U.mL−1 penicillin (Gibco) at 37 °C and 5% of CO2. On day 4, the differentiation of moDCs was evaluated by flow cytometry. The moDCs used will show the following phenotype: CD83 < 5%, CD86 < 30%, CD1a > 80% and DC-SIGN > 90%. moDCs are then used at the density of 1 million per mL.
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6

Isolation and Differentiation of Dendritic Cells and NK Cells

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Monocytes isolated from HD-PBMCs were sorted as CD14+ by using FACSAria cell sorter (BD Bioscience, NJ, USA) and cultured in the presence of rhIL-4 (20 ng/mL, Miltenyi Biotec, Germany) and rhGM-CSF (25 ng/mL, Sargramostim, Leukine©) in RPMI 1640 medium supplemented with 10% fetal bovine serum and with penicillin (100 U/ml) and streptomycin (100 μg/ml). (26 (link)) Following a 6 day of incubation at 37°C, non-adherent cells displayed the CD14-/CD11c+/CD83- phenotype, which is characteristic of immature DCs. Alternatively, BDCA1+DCs were directly isolated from HD or CHB pts at different stage of infection, as Lin-(CD19, CD3, CD14)/HLADR+/CD11c+/BDCA1+.
NK cells were isolated from both HD and CHB pts by negative magnetic separation (NK Cell Isolation Kit/ Miltenyi Biotec, Germany) or sorted as CD3-/CD56+ by FACSAria cell sorter. Cell populations sorted displayed a higher than 95% purity.
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7

Generation of Human Monocyte-Derived Dendritic Cells

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Human monocyte-derived dendritic cells (moDCs) were derived from monocytes isolated from human peripheral blood supplied by the French Blood Bank (EFS, Rungis, France). Healthy donors gave their written consent for the use of blood donation for research purposes. Peripheral blood mononuclear cells (PBMCs) were sorted from buffy coats by density centrifugation on a Ficoll gradient. Monocytes were then isolated through positive magnetic selection using MidiMacs separation columns and anti-CD14+ antibodies coated on magnetic beads (Miltenyi Biotec, Bergisch Gladbach, Germany) . Finally, CD14+ cells were differentiated in immature moDCs for 4 days in RPMI 1640 supplemented with GlutaMAX (Gibco, Invitrogen, Saint Aubin, France), 10 % heat-inactivated fetal bovine serum (FBS, Gibco, Invitrogen, Saint Aubin, France), 550 U.mL -1 granulocyte-macrophage colony-stimulating factor (rh-GM-CSF, Miltenyi Biotec, Bergisch Gladbach, Germany), 550 U.mL -1 interleukin-4 (rh-IL4, Miltenyi Biotec, Bergisch Gladbach, Germany), 1 mM sodium pyruvate (Gibco, Invitrogen, Saint Aubin, France), 100 µg.mL -1 streptomycin and 100 U•mL -1 penicillin (Gibco, Invitrogen, Saint Aubin, France).
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