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3 protocols using primary antibodies against p62

1

Western Blot Analysis of Autophagy Markers

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Subsequent to the indicated treatments, protein of cells was harvested with RIPA buffer (Beyotime, Shanghai, China) supplemented with PMSF (Beyotime) and determined using a bicinchoninic acid assay kit (Beyotime). Proteins were separated with 10% or 12% SDS-PAGE gels and transferred PVDF membranes (Merck Millipore, Billerica, MA, USA), which were blocked with 5% non-fat milk for 1 h at room temperature. The membranes were incubated with primary antibody at 4°C overnight and then blotted with secondary antibody for 2 h at room temperature. The bands were detected using enhanced chemiluminescence (Merck Millipore). The primary antibodies against p62 (1:1000), LC3 (1:1000), and β-actin (1:1000) were obtained from Cell Signaling Technology (Danvers, MA, USA).
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2

Western Blot Analysis of Autophagy Markers

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Total protein was extracted from treated cells with RIPA buffer (Wanlei Biotechnology, Shanghai, China) containing a protease inhibitor cocktail (Roche, Mannheim, Germany). The protein samples (30 μg per lane) were loaded onto 10% sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) gels and electro-transferred onto polyvinylidene difluoride membranes (PVDF) (Millipore, Billerica, MA, USA). Then, the membranes were saturated with 5% non-fat milk in Tris-buffered saline with Tween (TBST) for 2 h at room temperature and separately incubated at 4 °C overnight with primary antibodies against p62 (1 : 1000 dilution; Cell Signaling Technology, Danvers, MA, USA), autophagy related protein-5 (Atg-5) (1 : 1000 dilution; Cell Signaling Technology), LC3 (1 : 1000 dilution; Abcam, Cambridge, MA, USA), TRIM16 (1 : 500 dilution; Abcam) and GAPDH (1 : 2000; Santa Cruz Biotechnology, Inc., Santa Cruz, CA, USA), followed by horseradish peroxidase (HRP)-conjugated secondary antibody IgG (1 : 2000 dilution; Cell Signaling Technology). The protein signals were visualized using an enhanced chemiluminescence detection system (Thermo Fisher Scientific, Inc.), with GAPDH as a loading control.
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3

Rutin Attenuates Ox-LDL-Induced Macrophage Activation

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RAW264.7 mouse macrophages were obtained from the cell bank of the Chinese Academy of Sciences. Rutin was obtained from Shanghai Yuanye Biotechnology Co., Ltd., B20771, Shanghai, China, while ox-LDL was purchased from Guangzhou Yiyuan Biotechnology Co., Ltd., YB-002, Guangzhou, China. Glutaraldehyde at a concentration of 2.5% (Shanghai Yuanye Biotechnology Co., Ltd., R20510, Shanghai, China) was prepared. The primary antibodies against INOS, Arg1, IL-1β, and Mcp1 were obtained from Proteintech (Wuhan, China), while primary antibodies against P62, LC3, PI3K, p-PI3K, ATK, and p-ATK were bought from Cell Signaling Technology (Boston, MA, USA). Sigma-Aldrich provided the 3-methyladenine (3-MA) (St. Louis, MO, USA).
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