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Rmil 18

Manufactured by R&D Systems
Sourced in United States

RmIL-18 is a recombinant mouse interleukin-18 protein. Interleukin-18 is a proinflammatory cytokine that plays a role in the immune response.

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5 protocols using rmil 18

1

Enhancing Immunotherapy Efficacy in Mice

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Mice were treated once a day with an intraperitoneal injection of 10,000 IU/head rhIL2 (PeproTech) and 1 μg/head rmIL18 (R&D Systems). These cytokines were suspended in 200 μL of sterile PBS, and mice treated with 200 μL PBS were used as controls. Anti-mouse PD-L1 antibody (10F.9G2; BioLegend), anti-mouse PD-L2 antibody (TY25; BioLegend), anti-mouse VEGF antibody (B20–4.1.1; gifted from Genentech) or Rat IgG (MP Biomedicals) was administered intraperitoneally to the mice at a dose of 10 mg/kg three times from the day before cytokine treatment. Wet lung weight and moist rale were measured after 5 days of the treatment.
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2

Modulation of NK Cell Responsiveness

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To study the responsiveness of NK cells to IL-15, splenocytes were resuspended with RPMI 1640 medium and plated on 24-well plates. Then splenocytes were treated with rmIL-15 (Peprotech, 100 ng/mL) for 1, 2, 3, 5, 7, or 9 days, followed by flow cytometry. To investigate the influence of cytokines on METTL3 expression in NK cells, we treated splenocytes with rmIL-17F (25 ng/mL, Peprotech), rmIL-27 (25 ng/mL, Peprotech), rmIL-10 (25 ng/mL, Peprotech), rmIL-15 (25 ng/mL, Peprotech), rmTGF-β (25 ng/mL, R&D) and rmIL-18 (25 ng/mL, R&D) for 3 days. To study the effect of MC38 cells on METTL3 expression in NK cells, purified NK cells were cocultured with MC38 cells under the stimulation of rmIL-15 (10 ng/mL) with the presence or absence of SIS3 (20 μM, APExBIO, Houston, TX, USA) or GW788388 (20 μM, APExBIO) for 2 days. To observe the effects of SHP-2 on the NK cells, splenocytes were treated with rmIL-15 (50 ng/mL, Peprotech) with or without SHP-2 inhibitor SHP099 (4 μM, Selleck, Houston, TX, USA) for 3 days.
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3

Mature Thymic Cell Isolation and Stimulation

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Thymic single-cell suspensions were obtained by mechanical dissociation trough a 40 μm cell strainer. Enrichment in mature cells (CD24-) was achieved by negative selection using LS columns (Miltenyi) after staining the cells with anti-CD24-FITC antibody (Invitrogen) and anti-FITC microbeads (Miltenyi). 1 x 106 cells/mL were plated for 36h in complete RPMI 1640 media (10% FCS, 100 U Penicillin/Streptomycin, 10 mM Hepes, 1 mM Sodium Pyruvate, 1X Non-essential Amino Acid, 50 μM β-mercaptoethanol) alone or with addition of 5-OP-RU (1.5 μM, 5-OP-RU synthesised in house) or of rmIL18 (10 ng/mL, R&D).
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4

Cytotoxicity Assay with YAC-1 Cells

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YAC-1 cells were labeled with CTV (Thermo Fisher Scientific) as described above. Splenocytes were stimulated with recombinant mouse (rm) IL-12 (20 ng/mL, Peprotech), rmIL-15 (20 ng/mL, Peprotech) and rmIL-18 (10 ng/mL, R&D, Minneapolis, MN, USA) for 18 h. Then, the stimulated splenocytes (5 × 106) were cocultured with CTV-labeled YAC-1 cells (5 × 104) for 4 h, followed by an analysis of the BD flow cytometer.
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5

Activation and Proliferation of Murine Immune Cells

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Splenocytes were resuspended in RPMI-1640 supplemented with 10% FCS, 50 μM β-mercaptoethanol, 100 μM non-essential amino acids, 1 mM sodium pyruvate, 50 mM HEPES, and 2 μM L-glutamine. One million cells were stimulated for 6 hr in the presence of BD GolgiStop with 20 ng/ml recombinant mouse (rm) IL-12 (R&D Systems #419-ML/CF) and 10 ng/ml rmIL-18 (R&D Systems #B0025), with 20 ng/ml PMA and 200 ng/ml ionomycin, or with 10 μg/ml of plate-bound anti-NK1.1 antibody (clone PK136), were fixed and permeabilized with BD Cytofix/Cytoperm, and then stained for IFN-γ and CD107a. For phosphoSTAT5 (BD #612599) and phosphoSTAT3 (BD #557814) staining, one million cells were stimulated for the indicated times and concentrations with recombinant human (rh) IL-15 (R&D Systems #247-ILB) or rmIL-21 (Zymogenetics), fixed with 1% paraformaldehyde (PFA) in PBS, permeabilized with methanol, and stained. For proliferation assays, one million cell trace violet (Invitrogen #C34557)-labeled splenocytes were cultured in 10 ng/ml rhIL-15, 1×105 PFA-fixed RMA lymphoma cells, or mouse cytomegalovirus m157-transduced RMA cells supplemented with 50 U/ml rhIL-2 (NCI Preclinical Repository) or 100 ng/ml rmIL-21.
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