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Recombinant murine il 2

Manufactured by Miltenyi Biotec
Sourced in Germany

Recombinant murine IL-2 is a protein produced using recombinant DNA technology that is derived from the interleukin-2 (IL-2) cytokine found in mice. It is used as a research tool in various scientific applications.

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4 protocols using recombinant murine il 2

1

Antibody, Cytokine, and Chemical Protocol

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Antibodies are listed in Supplemental Table 2. Recombinant murine IL-2, human IL-2, and murine IL-6 were purchased from Miltenyi Biotec. Recombinant human IL-1β, IL-23, and TGF-β were purchased from R&D Systems. NECA and CSC were purchased from Merck.
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2

OT1 CD8+ T-cell Activation and Expansion

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OT1 CD8+ T-cells were activated and expanded using the H-2Kb-restricted OVA MHC class I epitope (OVA257–264; SIINFEKL), according to previously published methods.[19 (link)] Antigen-experienced T-cells were viably frozen and subsequently thawed for experiments, allowing cells to recover overnight. Cells were incubated for 6 d with 100 IU mL−1 recombinant murine IL-2, anti-CD3/28 stimulation beads according to manufacturer protocol (Miltenyi, 130-095-925), and 1 µg mL−1 recombinant murine PD-L1 protein (R&D systems, 1019-B7), with media and reagents changed out every 48 h. On day 7, T-cells were coincubated with B16-OVA tumor cells at a 10:1 effector to target ratio in 100 µL media for 3–6 h, along with 250, 50, 5, 0.5, or 0 µg of free aPD-1/aOX40 or equivalent dose of DINP. After coincubation, nonadherent T-cells were transferred onto an anti-IFN-γ coated ELISpot plate (BD, 551083) and incubated for 72 h before read-out, according to manufacturer protocol. Briefly, ELISpot plates were read out on an AID ELISpot reader (min. size 15, min. gradient > 1), reporting both absolute count and well activity. Well activity is an AID manufacturer-defined measurement of total cytokine release, dependent upon both absolute count and spot signal intensity. Activity values were normalized to the untreated control group.
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3

Evaluating MeVac-encoded FmIL-12 Potency

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Example 11

Vero-αHis cells were seeded in 15 cm cell culture dishes and infected with MeVac encoding FmIL-12 or eGFP. Supernatants were collected (15 ml per plate) when syncytia had spread over the whole cell layer (ca. 36 h post infection). FmIL-12 concentration was assessed using Mouse IL-12 p70 Quantikine ELISA Kit (R&D Systems). 2×106 freshly isolated splenocytes from a C57BL/6J mouse were resuspended in RPMI 1640 supplemented with 10% FCS, 1% Penicillin-Streptomycin solution and 50 U/ml recombinant murine IL-2 (Miltenyi, Bergisch Gladbach, Germany) with varying concentrations of MeVac encoded FmIL-12 or respective parts of supernatant from cells infected with eGFP encoding MeVac. Splenocytes were seeded in 12-well plates and incubated 48 h at 37° C. 5% CO2. Supernatants were collected and IFN-γ concentration assessed using mouse IFN gamma ELISA Ready-SET-Go!® (eBioscience) according to the instructions of the manufacturer.

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4

Antigen-Specific CD8+ T-cell Activation and Expansion

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OT1 CD8+ T-cells were activated and expanded using the H-2Kb-restricted OVA MHC class I epitope (OVA257–264; SIINFEKL), according to previously published methods.[19 (link)] Antigen-experienced T-cells were viably frozen and subsequently thawed for experiments, allowing cells to recover overnight. Cells were incubated for 6 d with 100 IU mL−1 recombinant murine IL-2, anti-CD3/28 stimulation beads according to manufacturer protocol (Miltenyi, 130-095-925), and 1 µg mL−1 recombinant murine PD-L1 protein (R&D systems, 1019-B7), with media and reagents changed out every 48 h. On day 7, T-cells were coincubated with B16-OVA tumor cells at a 0.25:1 effector to target ratio in 100 µL media for 48 h, along with 250, 50, 5, 0.5, or 0 µg of free aPD-1/aOX40 or equivalent dose of DINP. After coincubation, nonadherent cells were washed thrice from the plate, and remaining cell viability was measured with a CellTiter-Glo Luminescence kit (Promega, G7570), according to manufacturer protocol.
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