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5 protocols using interleukin 6 (il 6)

1

Investigating IL-6 Effects on Cancer Cells

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SCC-25/Detroit 562 cells were treated with 7 ml EMC-CM per 50 ml cell culture flask for 72 h. The medium was changed daily. To assess the effects of IL-6 SCC-25/ Detroit 562 cells were cultivated in albumin-containing medium supplemented with IL-6 at 50 ng/ml (RnD Systems, Biomedica, Vienna, Austria). The concentration of IL-6 was based on pre-experiments and on a publication of Sullivan and colleagues [29 (link)]. Exposure conditions were the same as in the first experimental group, i.e., IL-6 supplemented medium was used over a period of 72 h. At the end of the stimulation period, cells were used for immunohistochemistry, protein isolation and MTT assays respectively.
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2

Evaluating Combination Therapies on Myeloma Cells

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Myeloma cell lines (5×104 per well) were incubated with CPI203 (kindly provided by Constellation Pharmaceuticals, Cambridge, MA, USA) and/or lenalidomide (Selleck Chemicals LLC, Houston, TX, USA) plus dexamethasone (Merck, S.L., Darmstadt, Germany) at indicated doses in triplicates. MTT [3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide] assay (Sigma-Aldrich, St Louis, MO, USA) was used to evaluate the effect of the drugs on cell proliferation.
Primary cells were labeled with CellTracker™ Red CMPTX dye (Thermo Fisher) following the manufacturer’s protocol and co-cultured with the mesenchymal stromal cell line stromaNKtert in the presence of 10 ng/mL IL-6 (RnD Systems, Minneapolis, MN, USA). Cell proliferation was analyzed in an Attune acoustic focusing cytometer using Attune software (Thermo Fisher).
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3

Dose-dependent cytokine treatment of hTSCs

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hTSCs were seeded at 40,000 cells per well in a 24-well plate and incubated overnight at 37 °C in 8% oxygen. Cells were treated (triplicate, n = 5) for 24 h with 0, 0.1, 1 and 10 ng/mL doses of TNFα (Life Technologies, Carlsbad, USA), IL-6 (RnD systems, Minnesota, USA), or vehicle control (sterilised water or dPBS respectively). Following treatment, cell lysates were collected for RNA extraction and qRT-PCR.
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4

High-Throughput Cytokine-Driven BMDC Culture

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Per well, 6000 BMDCs in 15 µl of media containing Stemline II media (Sigma, catalog no. S0192-6X500ML), 10% FBS (ThermoFisher, catalog no. 26140095) penicillin-streptomycin (Fisher, catalog no. MT30002CI), and cytokines (50 ng/ml SCF, RnD Systems, catalog no. 455-MC-050; 20 ng/ml G-CSF, RnD Systems, catalog no. 414-CS-025; 20 ng/ml GM-CSF, RnD Systems, catalog no. 415-ML-020; 50 ng/ml FLT3, RnD Systems, catalog no. 768-F3-050; 20 ng/ml IL-6, RnD Systems, catalog no. 406-ML-200; 10 ng/ml IL-3, RnD Systems, catalog no. 403-ML-050; 30 ng/ml TPO, RnD Systems, catalog no. 488-TO-200; 1.5 ng/ml EPO, RnD Systems, catalog no. 959-ME-010) were placed into a black-walled 384-well plate (Corning, catalog no. 3764) and left overnight. Next day, 15 µl of 2× drug-containing solution was added to each well. For HiBit assays, 6 h later the HiBit Lytic reagent was added following the manufacturer’s protocols (Promega, catalog no. N3030) and plates were read using a Biotek H1 Synergy H1 Hybrid plate reader. For viability assays, 4 days after compound addition, the CellTiter-Glo reagent was added following the manufacturer’s protocols (Promega, catalog no. G7573) and plates were read using a Biotek H1 Synergy H1 Hybrid plate reader.
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5

Inflammasome Marker Quantification by ELISA

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Changes in cellular or excreted protein levels were measured by enzyme-linked immunosorbent assay (ELISA), to determine the expression of key inflammasome related markers including: IL-18 (MBL International, Woburn, USA), IL-1β, IL-6 and pro-IL-1β (RnD systems, Minneapolis, USA) and caspase-1 (Cusabio, Wuhan, China). Importantly, the antibodies used in IL-1β and pro-IL-1β ELISA are specific to each antigen. Results from cell lysates were normalised to total protein concentration as determined by a BCA assay.
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