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7 protocols using mouse il 1β duoset elisa kit

1

Inflammasome Activation in Microglia

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Microglia isolated from 9-mo-old 5XFAD and OPN-KO.5XFAD mice were seeded into 96-well plates at 6×104 cells/well in a conventional microglia culture medium (DMEM-F12 with 10% fetal bovine serum + 1% penicillin/ streptomycin + 10 ng/mL recombinant mouse M-CSF). To induce inflammasome activation, microglia were primed with 100 ng/mL LPS for 3 h followed by stimulation with 10 μM Aβ1-42 fibrils overnight in the presence or absence of 12.5 μg/mL rmOPN. The αVβ3 inhibitor (Cilengitide, Selleck, 10 μM) was added into culture 1 h before the addition of rmOPN. Microglial intracellular caspase-1 activity was analyzed by the bioluminescent Caspase-Glo® 1 Inflammasome Assay Kit (Promega) per the manufacturer’s instruction. The detection specificity of caspase-1 activity was validated using a selective caspase-1 inhibitor (Ac-YVAD-CHO, 1 μM) included in the kit. Culture medium was collected for quantitative determination of microglial IL-1β production by the mouse IL-1β DuoSet ELISA kit (R&D Systems) according to the manufacturer’s instructions.
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2

Plasma Cytokine Profiling by ELISA

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The levels of TNF-α, IL-1β, and IL-6 in human plasma were measured after the blood experiment described above. The assay was performed by using a human inflammation DuoSet ELISA kit (R&D Systems, Minneapolis, MN) specific for each cytokine, according to the manufacturer’s instructions. Absorbance was measured at a wavelength of 450 nm. Data shown are mean values ± standard error of the mean (SEM) obtained from at least 4 independent experiments, all performed in duplicate. For mouse plasma and peritoneal lavage, IL-1β was assessed using the Mouse IL-1β DuoSet ELISA kit (R&D Systems), whereas TNF-α, IL-6, IL-10, MCP-1, and gamma interferon (IFN-γ) were assessed using a mouse inflammation kit (Becton, Dickinson AB) according to the manufacturer’s instructions.
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3

Cytokine Measurement Using ELISA Kits

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The levels of TNF-α, IL-1β, and IL-6 were measured using a mouse TNF-α DuoSet ELISA kit (DY-410; R&D Systems), mouse IL-1β DuoSet ELISA kit (DY-401; R&D Systems), and mouse IL-6 DuoSet ELISA kit. (DY-406; R&D Systems), respectively. All ELISAs were performed following the manufacturer’s instructions.
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4

Cytokine and DNase-I Quantification

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DNase-I levels were analyzed from blood plasma using the Mouse Deoxyribonuclease I ELISA kit (MyBiosource, USA) following the manufacturer’s protocols. IL-1β and IL-6 levels were analyzed from colon lysates using the Mouse IL-1β DuoSet ELISA kit and Mouse IL-6 DuoSet ELISA kit (R&D Systems, USA) following the manufacturer’s protocols, respectively. All assays were performed in at least duplicates.
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5

Measuring IL-1β in Macrophages and Plasma

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Mouse IL-1β cytokine was measured in macrophage culture supernatants and mouse plasma using mouse IL-1β DuoSet ELISA Kit (R&D Systems) according to the manufacturer's instructions. qPCR Total RNA was isolated from macrophages using Trizol reagent (Thermo Fisher Scientific). cDNA was synthesized with Omniscript RT Kit (Qiagen). The relative mRNA expression level of each target gene was quantified by qPCR using KAPA SYBR fast qPCR master mix (Roche). Data were normalized to GAPDH and expressed relative to control unstimulated macrophages. The sequences of the primers are listed in Table S1.
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6

Oxidized LDL Detection and Macrophage Assay

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Hi-TBAR (thiobarbituric acid reactive)–oxidized human LDL (BT-910X) and human LDL (BT-903) were purchased from Biomedical Technologies Inc. Macrophage colony-stimulating factor (M-CSF) and mouse IL-1β DuoSet ELISA kits were purchased from R&D Systems. zYVAD.fmk and zVAD.fmk were purchased from BioVision Inc. and ApexBio, respectively. Nec-1 and DPI were obtained from Sigma-Aldrich. Cellular Reactive Oxygen Species Detection Kit was purchased from Abcam.
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7

Quantifying Cytokine Levels

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Serum and tissue homogenate were analyzed for cytokine levels using commercially available mouse IL-1β DuoSet ELISA kits (R&D Systems, Minneapolis, MN, USA), according to the manufacturer’s instructions.
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