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5 protocols using enhanced chemiluminescence blotting reagents

1

Protein Expression Analysis by Western Blot

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Cells were lysed in RIPA buffer combined with proteasome inhibitor and phosphatase inhibitors (Beyotime). Equal amounts of proteins were separated by 10% or 12% sodium dodecyl sulfate polyacrylamide gel electrophoresis, then separated target proteins were transferred to a polyvinylidene fluoride membrane (Millipore, Shanghai, China). After blocking in 5% non-fat milk for 60 min, the membranes were incubated overnight at 4 °C with antibodies specific to GAPDH (1:2000; Abcam, Shanghai, China), APELIN (1:2000; Abcam, Shanghai, China), RUNX2 (1:1600; Abcam, Shanghai, China), COL1A1 (1:1000; Abcam, Shanghai, China), non-phosphorylated (active) β-catenin (1:1000; Abcam, Shanghai, China), or total β-catenin (1:1000; Abcam, Shanghai, China). After washing with TBST three times (10 min each), the membranes were incubated with secondary antibodies (horseradish peroxidase-conjugated, Beyotime) for 1 h at room temperature. After washing three times with TBST, proteins were detected using enhanced chemiluminescence blotting reagents (Millipore). Signal intensity was measured by Bio-Rad XRS chemiluminescence detection system (Bio-Rad, Hercules, CA, USA).
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2

Western Blot Analysis of Cell Signaling Proteins

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Cells were lyzed in RIPA buffer supplemented with proteasome and phosphatase inhibitors (Beyotime). Equal amounts of proteins were separated by 10% SDS-PAGE and then transferred onto polyvinylidene fluoride (PVDF) membranes (Millipore, Shanghai, China). After blocking in 5% non-fat milk for 1 h, the membranes were incubated overnight at 4°C with antibodies specific to GAPDH (1:1,500; CST#5174, Cell Signaling Technology, Danvers, MA, United States), COL1A1 (1:1,000; ab34710, Abcam, Cambridge, United Kingdom), RUNX2 (1:1,600; ab192256, Abcam), active β-catenin (1:1,000; ab246504, Abcam) or total β-catenin (1:1,000; ab223075, Abcam). A stripping method was used to measure the two antibodies of same molecular weight. After washing four times (5 min each time) in Tris-buffered saline with 0.1% Tween 20 (TBST), the membranes were incubated with horseradish peroxidase-conjugated secondary anti-mouse or anti-rabbit antibodies (Beyotime) for 1 h at room temperature. After washing three times (5 min each time) with TBST, proteins were detected using enhanced chemiluminescence blotting reagents (Millipore). Signal intensity was measured using a Bio-Rad XRS chemiluminescence detection system (Bio-Rad, Hercules, CA, United).
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3

Western Blot Analysis of Cellular Proteins

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As previously reported (25 (link)). Cells were lysed in RIPA buffer supplemented with protease and phosphatase inhibitors (Beyotime). Equal amounts of proteins were separated by 10% SDS-PAGE and then transferred onto polyvinylidene flfluoride (PVDF) membranes (Millipore, Shanghai, China). After blocking in 5% non-fat milk for 2 h, the membranes were incubated overnight at 4°C with antibodies specific to GAPDH (1:1,500; CST#5174, Cell Signaling Technology, Danvers, MA, United States), β-catenin (1:1,000; ab32572, Abcam), LC-3I/II(1:1,000; ab128025, Abcam). After washing four times (5 min each time) in Tris-buffered saline with 0.1% Tween 20 (TBST), the membranes were incubated with horseradish peroxidase-conjugated secondary anti-mouse or anti-rabbit antibodies (Beyotime) for 1 hr at room temperature. After washing three times (5 min each time) with TBST, proteins were detected using enhanced chemiluminescence blotting reagents (Millipore). Signal intensity was measured using a Bio-Rad XRS chemiluminescence detection system (Bio-Rad, Hercules, CA, United).
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4

Western Blot Analysis of Osteogenic Markers

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Cells were lysed in RIPA buffer supplemented with proteasome and phosphatase inhibitors (Beyotime). Equal amounts of proteins were separated by 10% SDS-PAGE and then transferred onto polyvinylidene fluoride (PVDF) membranes (Millipore, Shanghai, China). After blocking in 5% non-fat milk for 1 hour, the membranes were incubated overnight at 4°C with antibodies specific to GAPDH (1:1,500; Cell Signaling Technology, Danvers, MA, USA), COL1A1 (1:1,000; Abcam, Cambridge, UK), RUNX2 (1:1,600; Abcam), active β-catenin (1:1,000; Abcam, Shanghai, China) or total β-catenin (1:1,000; Abcam). After washing four times (5 minutes each time) in Tris-buffered saline with 0.1% Tween 20 (TBST), the membranes were incubated with horseradish peroxidase-conjugated secondary anti-mouse or anti-rabbit antibodies (Beyotime) for 1 hour at room temperature. After washing three times (5 minutes each time) with TBST, proteins were detected using enhanced chemiluminescence blotting reagents (Millipore). Signal intensity was measured using a Bio-Rad XRS chemiluminescence detection system (Bio-Rad, Hercules, CA, USA).
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5

Western Blot Analysis of Osteogenic Markers

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Cells were lysed in RIPA buffer supplemented with proteasome and phosphatase inhibitors (Boster Biological Technology, Wuhan, China). Equal amounts of proteins were separated using 10% SDS-PAGE and transferred onto polyvinylidene uoride membranes (Millipore, Shanghai, China). After blocking in 5% non-fat milk for 1 h, the membranes were incubated overnight at 4°C with antibodies speci c against GAPDH (1:10,000), COL1A1 (1:1,000), RUNX2 (1:1,000), active β-catenin (1:1,000;), total β-catenin (1:1,000), phospho-GSK-3β (1:1,000), and total GSK3β (1:1,000). A stripping method was used to measure two antibodies of identical molecular weight. After washing four times (5 min each) in Tris-buffered saline with 0.1% Tween 20 (TBST), the membranes were incubated with a horseradish peroxidaseconjugated secondary anti-mouse or anti-rabbit antibody (Boster Biological Technology) for 1 h at room temperature. After washing three times (5 min each) with TBST, proteins were detected using enhanced chemiluminescence blotting reagents (Millipore). Signal intensities were measured using a Bio-Rad XRS chemiluminescence detection system (Bio-Rad, Hercules, CA).
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