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8 protocols using mouse hrp

1

Protein Analysis in Embryos

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Total protein was extracted from embryos and analyzed on 10% SDS-PAGE followed by western blot analysis according to the procedures described by Lin et al. [16 (link)], except that the yolk was removed by deyolking buffer (55 mM NaCl, 1.8 mM KCl and 1.25 mM NaHCO3) and antibodies against Flag (Abcam, Cambridge, UK; 1:5000 dilution), α-tubulin (Sigma-Aldrich, St. Louis, MO, USA; 1:5000 dilution), mouse-HRP (Santa Cruz, Santa Cruz, CA, USA; 1:5000 dilution), and rabbit-HRP (Santa Cruz; 1:5000 dilution) were used.
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2

Embryonic Protein Profile Analysis

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Total proteins extracted from embryos were analysed on a 10% SDS-PAGE followed by western blot analysis according to the procedures described by Lin et al. [5 (link)], except that the yolk was removed and the antibodies against Rtn4a (Abk; 1 : 1000), FAK (Cell Signaling; 1 : 1000), phosphor FAK [pY397] (Thermo; 1 : 1000), cell division control protein 42 homologue (cdc42) (New East; 1 : 500), active cdc42 (New East), α-tubulin (Sigma-Aldrich; 1 : 5000), GADPH (Santa Cruz; 1 : 1000), mouse-HRP (Santa Cruz; 1 : 5000) and rabbit-HRP (Santa Cruz; 1 : 5000) were used.
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3

Western Blot Analysis of YAP Protein

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To characterize Yap expression at the protein level, cells were lysed with ice-cold RIPA buffer and cleared by centrifuging at maximum speed for 5 minutes at 4 ºC. The total protein concentration in each sample was determined using the Pierce BCA assay kit. Equal protein amounts from each sample or treatment were then prepared and reduced in Laemmli sample buffer. The reduced samples were loaded and run in 10% Novex mini-cell SDS-PAGE gels (Invitrogen) and transferred to PVDF membranes (Bio Rad) after separation. The blots were then blocked in 5% BSA in TBS-T (blocking buffer) overnight at 4 ºC. Primary antibodies in blocking buffer were applied to the blots at room temperature for 2 hours. Blots were then rinsed with TBS-T, and secondary antibodies in TBS-T were applied for 2 hours. Chemiluminescent detection was used to visualize the blots, which were subsequently detected via autoradiography film (Hyblot CL). The film was processed and imaged using a Fotodyne white light transilluminator. Primary antibodies used were anti-YAP (H-9) (Santa Cruz Biotech.) and anti-β-actin (Santa Cruz Biotech.) at a dilution of 1:100 and 1:2000 respectively. The secondary antibody mouse-HRP (Santa Cruz Biotech.) was used at a 1:10,000 dilution. Densitometry analysis of the Western blots was carried out with ImageJ.
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4

Protein Extraction and Western Blotting Methodology

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Cells were washed 3× with PBS, followed by lysis with MAPK buffer and a protease inhibitor cocktail from Sigma-Aldrich #P8340, 50 mM β-glycerophosphate, pH 7.2, 0.5% Triton X-100, 5 mM EGTA, 100 μM sodium orthovanadate, 1 mM dithiothreitol, and 2 mM MgCl2. 10–40 μg of total protein was fractionated by SDS–polyacrylamide gel electrophoresis and transferred to Polyvinyledine difuloride membranes. Antibodies used were as follows: pSTAT1 (Y701) Cell Signaling #9167S (1:500–1:1,000); STAT1, Cell Signaling #9172S (1:1,000–1:1,500); SOCS1, Abcam #ab3691 (1:300–1:500); IFNGR1 (interferon γ receptor α), Lifespan Biosciences #LS-C33-4260 (1:300–1:500); IFNGR2 (interferon γ receptor β/AF-1), Abcam #77246 (1:300–1:500); β-ACTIN, Sigma-Aldrich #A5441 (1: 5,000–1:10,000); Rabbit HRP, Jackson Immuno Research #111-035-144 (1: 5,000–1:10,000); and Mouse HRP, Santa Cruz #sc-2005 (1: 5,000–1:10,000).
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5

Protein Immunoblotting Protocol

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For immunoblotting, 20–40 μg of protein extracts were boiled and separated by 11–13% SDS-polyacrylamide gel electrophoresis (SDS-PAGE). The proteins were transferred to polyvinylidene difluoride membranes, blocked for 1 h in Tris-buffered saline (TBS) containing 0.1% Tween 20 and 5% (w/v) dry skim milk powder, and incubated overnight with the indicated primary antibodies. The membranes were then incubated for 1 h with an HRP-conjugated secondary antibody (rabbit-HRP, Abcam; or mouse-HRP, Santa Cruz Biotechnology). Chemiluminescence was detected using chemiluminescence reagents (Animal Genetics, Tallahassee, FL, USA).
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6

Glioma Cell Line Characterization

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The human glioma U-251 cell line was kindly provided by Dr. Dah-Yu Lu (Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan). The human glioma GBM8401 and GBM8901 cell line was kindly provided by Dr. Li-Sung Hsu (Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan). The U-87MG (BCRC No. 60360) and M059K cell line (BCRC No. 60381) were purchased from the Bioresources Collection and Research Center (BCRC, Hsinchu, Taiwan). These cells were cultured in DMEM/F12 and MEM medium supplemented with 1 × penicillin/streptomycin and 10% fetal bovine serum (HyClone, Logan, UT, USA) were incubated at 37 °C in a humidified incubator containing a 5% CO2 atmosphere. LCN2 antibody was purchased from R&D Systems, Inc (Minneapolis, MN, USA). U0126 (MEK inhibitor), siRNA-CTSD (si-CTSD), Cathepsin D (CTSD), t-ERK, β-actin, HRP-mouse and HRP-rabbit antibodies were purchased from Santa Cruz Biotechnology (Santa Cruz, CA, USA). Matrigel Matrix was purchased from Corning company (Tewksbury, MA, USA). Phosphorylated-ERK (p-ERK) was obtained from Cell Signaling Technology (Beverly, MA, USA).
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7

DNA Damage Response Protein Analysis

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Primary antibodies: RAD51 (Merk, Ab-1, PC130, 1:1000), RAD52 (Thermo Fisher, PA5-65036, 1:500), XAB2 (abcam, ab129487, 1:1000), CtIP (Active Motif, 61141, 1:500), ATM (abcam, ab32420 (Y170), 1:1000), P-ATM (abcam, ab81292 (pS1981), 1:50000), P-KAP1 (Bethyl, IHC-00073 (pS824) 1:200).
Secondary antibodies: HRP rabbit (Jackson Laboratory, Cat. No. 111-035-003, 1:50 000), HRP mouse (Amersham/Sigma, Cat. No. GENA931-1ML, 1:10 000), HRP mouse (Santa Cruz, sc-516102, 1:10 000).
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8

MTT Assay for Apoptosis Evaluation

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3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) was obtained from Sigma-Aldrich (St. Louis, MO, USA). Primary antibodies against cleaved caspase-3, and cleaved PARP were purchased from Cell Signaling Technology Inc. (Danvers, MA, USA). Mcl-1, β-actin, HRP-mouse and HRP-rabbit antibodies were purchased from Santa Cruz Biotechnology (Santa Cruz, CA, USA).
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