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3 protocols using rabbit anti stat6

1

Immunoblotting Analysis of Murine Naïve T Cells

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Mouse naïve T cells stimulated in vitro as indicated above were lysed in the presence of protease/phosphatase inhibitor cocktail (catalog no. 5872; Cell Signaling Technology, Danvers, MA) for 30 min on ice. The lysates were centrifuged at 12000 × g for 30 min, 4 °C and the supernatants were subjected to standard SDS-PAGE followed by transferring to PVDF membranes for detection of STAT, T-bet or GATA-3 proteins. Rabbit anti-STAT1 (catalog no. 9172S), anti-phospho-(Tyr701) STAT 1 (catalog no. 9167S), anti-STAT4 (catalog no. 2653S), and anti-phospho-(Tyr693) STAT 4 (catalog no. 4134S) were from Cell Signaling Technology. Rabbit anti-STAT6 (catalog no. ab32520) and anti-phospho-(Tyr641) STAT 6 (catalog no. ab54461) were from Abcam. Anti-T-bet mAb 4B10 (catalog no. sc-21749) and anti-GATA-3 HG3-31 (catalog no. sc-268) were from Santa Cruz (Dallas, TX, USA).
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2

Quantification of STAT6 and p-STAT6 Proteins

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Total protein was collected with Total Protein Extraction Kit (KeyGen Biotech. Co. Ltd., Nanjing, China). Proteins (30 mg) were separated on a 10% sodium dodecyl sulfate-polyacrylamide gel, and transferred electrophoretically onto polyvinylidene difluoride membranes (BD Biosciences). The membranes were blocked in 5% skimmed milk for 1 h, and then incubated for 2 h with rabbit anti-STAT6 (1:1,000; Abcam, Cambridge, MA, USA), rabbit anti-phosphorylated (p)-STAT6 (1:1,000; Cell Signaling Technology, Inc., Danvers, MA, USA) or rabbit anti-GAPDH (1:1,000; Bioworld, Technology, Inc., St. Louis Park, MN, USA), which was used as loading control. Following incubation with goat anti-rabbit secondary antibody (Bioworld, Technology, Inc.), the signals derived from the antibody-antigen binding reaction were detected by enhanced chemiluminescence (BD Biosciences).
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3

Protein Analysis of HUVEC and Tumor Tissue

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HUVECs were washed twice with ice-cold PBS and lysed with cell lysis buffer (Beyotime Biotechnology) containing an EDTA-free protease inhibitor (Roche). Tumor tissue was incubated with ice-cold cell lysis buffer containing protease inhibitor and disrupted with Tissuelyser-24. Protein concentration was quantified using the Pierce™ BCA Protein Assay Kit (Thermo Fisher Scientific, Waltham, MA, USA). Western blotting was performed as previously described (23 (link)). Blots were incubated with Pierce ™ ECL Western Blotting Substrate (Thermo Fisher), and detected by AI 680 (General Electric Company, Boston, MA) Antibodies used for western blotting included rabbit anti-phospho-STAT6 (Tyr-641, 1:1000, Cell Signaling Technology); rabbit anti-STAT6 (1:1000, Abcam); rabbit anti-NRP1 (1:1000, Affinity); rabbit anti-NRP1 (1:1000, Abcam); and rabbit anti-Tubulin (1:5000, Proteintech). The secondary antibody was horseradish peroxidase (HRP)-conjugated goat anti-rabbit immunoglobulin G (IgG) (1:8000, Proteintech).
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