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4 protocols using mil 1β

1

Immunohistochemical Evaluation of NLRP3, Caspase-1, and IL-1β

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Sections were permeabilized with 1% Triton X-100 for 2 h and blocked with normal goat serum (Beyotime Institute of Biotechnology, Haiman, China) for 30 min at room temperature, the sections were incubated sequentially with NLRP3 (1:500; cat. no. ab223687; Abcam), caspase-1 (1:500; cat. no. ab108362; Abcam) and mIL-1β (1 µg/ml; cat. no. ab9722; Abcam) antibodies at 4°C overnight. The next day, after rewarming for 1 h, sections were washed with PBS and then incubated with mouse anti-rabbit IgG-HRP (cat. no. sc-2357, 1:100) antibody for 2 h at room temperature. To visualize the signals, sections were treated with peroxidase substrate 3,3′-diaminobenzidine (DAB, 0.05%, ZSGB-Bio, China) and counterstained with hematoxylin for 1 min at room temperature. Sections were viewed and imaged under a light microscope (Ni-U; Nikon Corporation, Tokyo, Japan). Images were analyzed quantitatively using Image-Pro Plus 6.0 (Media Cybernetics, Inc., Rockville, MD, USA).
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2

Molecular Mechanisms of NLRP3 Inflammasome Activation

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Briefly, the proteins from H9c2 cells or heart tissues were separated by 12% SDS‐polyacrylamide gels and transferred onto PVDF membranes. After blocked with TBST containing 5% BSA, membranes were incubated with NLRP3, ASC, TLR6 (Santa Cruz), Pro‐IL‐1β, Pro‐Caspase 1 (abcam), mIL‐1β, Cleaved Caspase‐1, p65, p‐p65, IKKα, IKKβ, p‐IKKα/β, p‐TAK1, TAK1, p‐JNK, JNK, p‐MKK3/6, MKK6, p‐p38, p38, VDAC (Cell Signaling Technology Inc), Cytochrome C (Bioword), UCP2 (Proteintech) rabbit antibodies and GAPDH (ABclonal Technology) mouse antibody overnight at 4℃. Then, the membranes were incubated with horseradish peroxidase‐labelled secondary antibodies (ABclonal Technology) for 2 hours at room temperature. Subsequently, the protein bands were detected with Pierce™ ECL Western Blotting Substrate and scanned by an automatic chemiluminescence imaging system (Tanon 5200; Tanon).
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3

Lung Cytokine Profiling by ELISA and Western Blot

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Western blotting for lung homogenates and cell lysates was performed as described in earlier publications22 , 30 (link). Antibodies to mCaspase-1 (Adipogen), mIl-1β (Abcam), mNLRP6 (Sigma), hNLRP6 (Abgent), hNLRP3 (Cell Signaling), citrullinated histone H3 (Abcam) and GAPDH (Cell signaling) were used for immunoblotting. Human IL-1β and IL-18 and mouse TNF-α, MCP-1, IL-1β, IL-6, G-CSF, and IL-17A (eBioscience), and mouse CXCL1, CXCL2, and CXCL5 (R&D systems) were quantified according to the manufacturers’ protocols. To perform ELISA in mouse lung homogenates, snap frozen lung lobes were thawed, homogenized in 2 mL PBS containing 0.1% triton X-100 supplemented with complete protease/phosphatase inhibitor (1 tablet/50 mL) (Roche), centrifuged, and filtered prior to use for ELISA. Readings were normalized to total protein of lung homogenates and expressed as pg/mg.
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4

Lung Cytokine Profiling by ELISA and Western Blot

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Western blotting for lung homogenates and cell lysates was performed as described in earlier publications22 , 30 (link). Antibodies to mCaspase-1 (Adipogen), mIl-1β (Abcam), mNLRP6 (Sigma), hNLRP6 (Abgent), hNLRP3 (Cell Signaling), citrullinated histone H3 (Abcam) and GAPDH (Cell signaling) were used for immunoblotting. Human IL-1β and IL-18 and mouse TNF-α, MCP-1, IL-1β, IL-6, G-CSF, and IL-17A (eBioscience), and mouse CXCL1, CXCL2, and CXCL5 (R&D systems) were quantified according to the manufacturers’ protocols. To perform ELISA in mouse lung homogenates, snap frozen lung lobes were thawed, homogenized in 2 mL PBS containing 0.1% triton X-100 supplemented with complete protease/phosphatase inhibitor (1 tablet/50 mL) (Roche), centrifuged, and filtered prior to use for ELISA. Readings were normalized to total protein of lung homogenates and expressed as pg/mg.
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