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4 protocols using anti ets1 antibody

1

ChIP Assay for PTP1B Gene

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ChIP assay was carried out using a SimpleChIP Plus Sonication Chromatin IP kit (Cell Signaling Technology, Beverly, USA) according to the manufacturer’s protocol. Briefly, cells were fixed with 1% formaldehyde and chromatin was sheared with a Microson XL ultrasonic cell disruptor (Misonix, Farmingdale, USA). Then, 10 μl of solution was used as the input. The surplus samples were incubated with anti-ets1 antibody (Abcam) or IgG for 10 h at 4°C. After the immunoprecipitants bound to protein G magnetic beads, the beads were washed and incubated at 65°C for 2 h. After purification, the sequence of DNA fragments was detected by PCR analysis. The primer sequences for
PTP1B are listed below: forward 5′-CATTATTCAACACACTTCCCA-3′, and reverse 5′-GGACACTTGTGCTATTTTGAG-3′.
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2

HUVEC Protein Expression Analysis

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After treatment with DHA, HUVECs were lysed in RIPA lysis buffer with 0.1% SDS, 1 mg/ml leupeptin and 1 mM PMSF on ice. Proteins were quantified by BCA assay (Bio‑Rad, Hercules, CA, USA). The protein samples were loaded and separated on a 8% SDS‑polyacrylamide gel, then electroblotted onto the PVDF membranes. The membranes were blocked 1 h in 5% skim milk in TBS-T (TBS containing 0.05% Tween-20), and then incubated with the primary antibody at 4˚C overnight. The primary antibodies include anti-VEGFR1 antibody (Abcam, Cambridge, MA, USA), anti-ETS-1 antibody (Abcam) and anti-β-actin antibody (Sigma-Aldrich). The membranes were washed in TBS-T, and incubated with a HRP-linked goat anti-rabbit secondary antibody (Proteintech, Chicago, IL, USA) for 2 h at room temperature. The protein bands were visualized with an ECL kit (Millipore, Billerica, MA, USA).
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3

ETS1 RNA Immunoprecipitation Protocol

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RIP was performed using Magna RNA‐binding protein immunoprecipitation kit (Millipore Corp., Bedford, MA, USA). The cells were lysed in complete RNA lysis buffer and incubated in RIP immunoprecipitation buffer containing magnetic beads conjugated with anti‐ETS1 antibody (diluted for 1:200, Abcam, Cambridge, USA) or IgG control (diluted for 1:100, Abcam). The immunoprecipitated RNAs were then isolated by Proteinase K and subjected to subsequent qRT‐PCR detection.
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4

Comprehensive Western Blot Analysis

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Western blot analysis was performed using standard procedures. The following primary antibodies were used in the experiments: anti-FOXM1 antibody (Santa Cruz), anti-pAKT antibody (Peprotech, USA), anti-AKT antibody (Cell Signaling Technology, Beverly, MA, USA), anti-pGSK3β antibody (Proteintech) at 1:1000, anti-Snai1 antibody (Cell Signaling Technology), anti-pIGF1R antibody (Abcam, Cambridge, UK), anti-IGF1R antibody (Abcam, Cambridge, UK), anti-E-cadherin antibody (BD Biosciences, USA), anti-Vimentin antibody (Cell Signaling Technology), anti-N-cadherin antibody (Cell Signaling Technology), anti-pERK1/2 antibody (Abcam), anti-ERK1/2 antibody (Abcam), anti-HIF1α antibody (Novus Biologicals, USA), anti-ETS1 antibody (Abcam) and anti-β-actin antibody (Sigma, St. Louis, MO,USA).
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