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3 protocols using anti neuropilin1

1

Protein Expression Analysis by Western Blot

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Cells were lysed in RIPA buffer (Beyotime, Jiangsu, China) containing protease inhibitor cocktail (Beyotime). Total protein was quantified by the Bradford protein assay (Bio-Rad, Hercules, CA). Samples were denatured at 100 °C for 5 min. Equal amounts of total protein were analyzed by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and western blotting using polyvinylidene fluoride microporous membranes (Bio-Rad). Membranes were incubated with primary antibody overnight at 4 °C, followed by incubation with horseradish peroxidase-linked secondary antibody at room temperature for 1 hour and detected with SuperSignal West Pico Chemiluminescent Substrate (Thermo). The primary antibodies, anti-Rac1 and anti-Neuropilin1 were purchased from Abcam (Cambridge, UK), while anti-β-catenin and anti-GAPDH were purchased from Cell Signaling Technology (Danvers, MA).
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2

Neuropilin-1 Protein Expression Analysis

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Protein was extracted from mouse cortex and mixed with sample buffer (5% 2-mercaptoethanol) and boiled at 100℃ for denaturation. Protein samples were loaded on 4-15% gradient gel (Bio-Rad) to separate on size through vertical SDS-PAGE system. Antibodies used for immune-blot analysis were; anti-Neuropilin-1 (abcam, 1:1000) and anti-β-actin (BETHYL, 1:10000). Images were acquired by ChemiDoc MP imaging system (Bio-Rad).
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3

Antibody Validation for VEGFR2 Signaling

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Anti-SCUBE2 (catalog GX85173) polyclonal antibody was from GeneTex (Irvine, CA). Anti-phospho-VEGFR2 (Thr1059; catalog 3817), anti-phospho-MAPK p44/p42 (Thr202/Tyr204; catalog 9106), anti-MAPK p44/p42 (catalog 9102), anti-phospho-AKT (Ser473; catalog 9271), and anti-AKT (catalog 9272) antibodies were from Cell Signaling Technology (Danvers, MA). Anti-VEGFR2 antibody was from Thermo Scientific (Rockford, IL; catalog MA5-15157). Anti-VEGF (catalog sc-152), anti-EEA1 (early endosome antigen 1; catalog sc-137130), and anti-LAMP2 (lysosome-associated membrane protein 2; catalog sc-18822) antibodies were from Santa Cruz Biotechnology (Santa Cruz, CA). Anti-CD31 (catalog ab28364) and anti-neuropilin-1 (catalog ab81321) antibodies were from Abcam (Cambridge, MA). Anti-Ki67 antibody was from DAKOCytomation (Glostrup, Denmark; catalog M7249). Recombinant VEGF 165 protein was from R&D Systems (Minneapolis, MN; catalog 293-VE).
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