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3 protocols using twist1 2

1

Antibody-based Protein Expression Analysis

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Antibodies to c-Myc (sc-7274), cyclin D1 (sc-753), ErbB-3 (sc-285), Lyn A/B (sc-764), Fyn (sc-16), Src2 (sc-18), VEGF-A (sc-53462), E2A.E12 (sc-349), and ZEB1(sc-10572) (Santa Cruz Biotechnology), p27Kip1 (BD-Pharmingen 554069), ALDH1 (BD, 661194), Stat3 (BD-Transduction Laboratories, S21320), Twist1/2 (Gene Tex, GTX127310), pY705-Stat3 (Cell Signaling Technology, #9131), Snail-1 (Cell Signaling Technology, LF062), CK5 (ABCAM, ab52635), pY418-Src (Invitrogen, 44660G), GAPDH (MAB374) and MMP9 (AB19016) (Millipore), PARP (Biomol, SA-249 clone C-2_10), β-actin (A5441), TAZ (HPA007415), and hydrocortisone were from Sigma-Aldrich, and CD44 (clone HP 2/9) was a gitf from Dr. F. Sanchez-Madrid (University Hospital La Princesa, UAM) [17 (link)], MatrigelTM (Corning). Secondary horseradish peroxidase-conjugated antibodies, and B27 (Life Technologies). EGF, and bFGF (PeproTech EC Ltd). Fetal Calf Serum (FCS), Acrylamide/Bisacrylamide, SDS and ammonium persulfate (Bio-Rad Laboratories). ECL (GE Healthcare Biosciences). BCA protein assay (Thermo Scientific).
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2

Western Blot Analysis of EMT Markers

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RIPA buffer with phosphatase and protease inhibitor was used to extract total protein in tissues or cells. Proteins were separated by SDS-PAGE and transferred onto the PVDF membrane. After blocking in 5% non-fat milk with PBST, primary antibodies against TEAD4 (GTX108750, GeneTex), E-cadherin (20,874-1-AP, Proteintech), N-cadherin (22,018-1-AP, Proteintech), Fibronectin (sc-8422, Santa Cruz), Twist1/2 (GTX127310, GeneTex) or GAPDH (sc-32,233, Santa Cruz) were used. The membranes were then incubated in the horseradish peroxidase (HRP)-conjugated secondary antibodies after washing in PBST three times. ECL substrate kit (Tanon Science & Technology, Shanghai, China) was used to visualize the immunoreactive bands on the blots.
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Evaluating Protein Expression and Modifications via Western Blotting

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Western blotting was performed as previously described(74 (link)). Nuclear and cytoplasmic fractions of cell lysates were isolated following manufacturer’s protocol (#78835, ThermoFisher). Protein concentrations were quantified using BCA assay (#23227, ThermoFisher). Around 20 μg of protein was loaded on 8% SDS-PAGE gels, transferred to PDVF membrane, blocked with 5% non-fat milk in 1xTBST, incubated with primary antibodies overnight at 4°C. Primary antibodies: DDR2 (1:1000, PA1879, Boster); phospho-DDR2 Y740 (1:1000, MAB25382, R&D systems); α-tubulin (1:1000, sc-32293, Santa Cruz); β-tubulin (1:1000, #2128, Cell Signaling); GAPDH (1:2000, sc-25778, Santa Cruz); Twist1/2 (1:1000, GTX127310, GeneTex); Snail (1:1000, #3895, Cell signaling; Lamin A/C (1:1000, #4777T, Cell signaling); TAZ (1:1000, 560235, BD biosciences); YAP (1:1000, sc376830, Santa Cruz); YAP (1:1000, #14074, Cell Signaling); E-cadherin (1:1000, 610404, BD biosciences). For immunoprecipitation, Phospho-(Ser/Thr) Phe Antibody (1:100, #9631, Cell Signaling).
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