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Human il 18 elisa kit

Manufactured by MBL Life Science
Sourced in United States

The Human IL-18 ELISA kit is a quantitative sandwich enzyme-linked immunosorbent assay (ELISA) designed for the measurement of human interleukin-18 (IL-18) levels in biological samples. The kit utilizes a pre-coated microplate with specific antibodies and provides the necessary reagents to perform the assay.

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6 protocols using human il 18 elisa kit

1

Cytokine Profiling from Serum Samples

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Blood samples for cytokine measurements were centrifuged for 10 min at approximately 3000 r/min 4 °C, and the serum was separated and stored at − 80 °C prior to analysis. We measured seven circulating serum cytokine levels. Circulating levels of receptor activator of nuclear factor-kappa B ligand (RANKL), adiponectin, monocyte chemotactic protein-1 (MCP-1), interleukin-6 (IL-6), human pentraxin 3 (PTX3), interleukin-18 (IL-18), and tumor necrosis factor-α (TNF-α) were determined by enzyme-linked immunosorbent assay (ELISA) according to the manufacturer's instructions. ELISA Kit for receptor activator of nuclear factor kappa B ligand (USCN Life Science Inc., Houston, TX), human total adiponectin/Acrp30 Quantikine ELISA Kit, human CCL2/MCP-1 Quantikine ELISA Kit, human interleukin-6 (IL-6) Quantikine ELISA Kit, human pentraxin 3/TSG-14 Quantikine ELISA Kit, human TNF-α Quantikine ELISA Kit (R&D Systems, Inc., Minneapolis, MN), and human IL-18 ELISA Kit (MBL International, Woburn, MA) were used.
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2

Quantifying IL-1β and IL-18 in Cell Culture

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The Quantikine Human IL-1β/IL-1f2 Immunoassay (R&D Systems, Minneapolis, MN, measures predominantly mature IL-1β) was used on concentrated cell medium, prepared as described earlier, and the assay performed according to the manufacturer’s instructions as previously published [3 (link)]. IL-18 release was measured using the Human IL-18 ELISA kit (MBL International, Woburn, MA, measures predominantly active IL-18, 0.7% pro IL-18). Values were expressed as pg/mL of IL-1β or IL-18 from the original supernatant (non-concentrated).
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3

Cytokine Quantification in Supernatants

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Cytokines were quantified in supernatants using human IL-1β DuoSet ELISA kit (DY201, R&D systems), human IL-18 ELISA Kit (7620, MBL International), human IL-8 DuoSet ELISA kit (DY208, R&D systems), and human MCP-1 DuoSet ELISA kit (DY279, R&D systems), according to the manufacturers’ instructions.
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4

Cytokine and Metabolic Profiling of CF Cultures

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Conditioned supernatants of human CF cultures were snapfrozen at -80 °C and assessed by colorimetric/fluorometric assay or ELISA using the following kits as instructed by the manufacturer: Pierce® LDH Cytotoxicity Assay Kit and Human IL-1beta Uncoated ELISA Kit (both from Thermo Fisher), Glucose Assay Kit and Fluorometric Lactate Assay Kit (both from Cell Biolabs, San Diego, CA, USA), Human IL-6 Quantikine ELISA (R&D Systems, Wiesbaden, Germany), Human IL-18 ELISA Kit (MBL International, via Biozol, Eching, Germany).
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5

Cytokine Production by Stimulated MoDCs

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Supernatants from MoDCs stimulated for 6, 18, 24 or 72 hours in a humidified incubator (37°C, 5% CO2) with TLRAs, and/or CLRAs were analyzed for TNF, IL-18 or IL-23 production. For this, human enzyme-linked immunosorbent assay (ELISA) kits were used as per the manufacturer’s instruction. TNF: BD Opteia ELISA set (BD Biosciences; San Jose, CA, USA). IL-23: Human IL-23 Quanktikine ® ELISA kit (R&D systems; Minneapolis, MN, USA). IL-18: Human IL-18 ELISA kit (MBL International: Woburn, MA, USA). ELISA plates were read on a Versamax microplate reader with SoftMax Pro Version 5 (both from Molecular Devices; Sunnyville, CA, USA).
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6

RNA Isolation, cDNA Synthesis, and Cytokine Quantification

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RNA was purified using the RNeasy Micro kit (Qiagen, Hilden, Germany) for patient material or the PureLink RNA mini kit (Invitrogen, Carlsbad, CA, USA). cDNA synthesis was performed using Super Script II Reverse Transcriptase (Invitrogen), according to manufacturer's protocols. mRNA levels were analyzed in duplicate by qPCR using TaqMan Gene Expression Assays [Applied Biosystems, Foster City, CA, USA; Assay IDs: Hs00171042_m1 (IP-10/CXCL10), Hs00158032_m1 (IDO), Hs00271720_m1 (IL-18BP), Hs01555410_m1 (IL-1β), Hs00174103_m1 (IL-8/CXCL8)] and normalized to housekeeping gene GAPDH. Cytokine levels in plasma were measured by sandwich ELISA according to the manufacturer's protocols (IFN-γ, IL-6, IL-1β High Sensitivity ELISA, eBioscience, San Diego, CA, USA; Human IL-18 ELISA kit MBL International, Woburn, MA, USA; Human IL-18BPa Duoset, R&D Systems, Minneapolis, MN, USA). IP-10, MIG and IL-8 levels were quantified by sandwich ELISA as described [37, 38] . Levels of free IL-18 were calculated as described [39] .
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