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7 protocols using anti mst2

1

Culturing Cancer Cell Lines

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The HEK293, MCF7 breast cancer cells, and A549 lung cancer cells were cultured in Dulbecco’s modified Eagle’s medium (DMEM) supplemented with 10% fetal bovine serum (FBS). HCT116 colon cancer cells were cultured in McCoy’s 5A medium with 10% FBS. Cell detachment was achieved by culturing cells in poly–HEMA (2-hydroxyethyl methacrylate)–coated dishes. Where indicated, the following drugs were used: phosphatase inhibitors (10 mM sodium fluoride, 10 mM sodium pyrophosphate) and 2-DG (25 mM) were from Sigma. Glucose-free DMEM was from Thermo Fisher Scientific. The following antibodies were obtained commercially: anti-CTCF (Cell Signaling Technology, #3418), anti–phospho-RxxS/T motif (Cell Signaling Technology, #9614), anti-LATS1 (Cell Signaling Technology, #3477), anti-MST2 (Cell Signaling Technology, #3952), anti-YAP (Cell Signaling Technology, #14074), anti–phospho-YAP (S127) (Cell Signaling Technology, #13008), anti-Flag (Sigma, #F1804), and anti-tubulin (Sigma, #T9026). Rabbit polyclonal anti–phospho-CTCF (S402) antibodies were custom generated using a specific phosphopeptide (GenScript).
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2

Hippo Signaling Pathway Antibodies

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Antibodies against caspase 9 (sc-56077) and β-actin (sc-8432) were obtained from Santa Cruz Biotechnology, Texas, United States. Others were purchased from Cell Signaling Technology: anti-PARP (#9542), anti-cleaved caspase 3 (#9661), anti-MST1 (#3682), anti-MST2 (#3952), anti-p-MST1(T183)/MST2(T180) (#49332), anti-LATS1 (#3477), anti-p-LATS1(S909) (#9159), anti-p-LATS1(T1079) (#8654), anti-MOB1 (#13730), anti-p-MOB1 (T35) (#8699), anti-SAV1 (#13301), anti-YAP (#14074), anti-p-YAP (S127) (#13008), and anti-p-YAP (S397) (#13619). RNase A and Propidium Iodide/PI were purchased from Coolaber (Beijing, China) and Sigma-Aldrich (United States), respectively.
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3

Immunoblotting of Mst1 and Mst2

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Cells were lysed with radioimmunoprecipitation assay (RIPA) buffer (Thermo Fisher Scientific) containing cOmplete protease inhibitor (Sigma) and frozen. Equal amounts of protein were separated on 4%–12% bis-Tris NuPage gels and transferred to polyvinylidene fluoride (PVDF) membranes (Thermo Fisher Scientific). Immunodetection was performed using anti-Mst1 (Cell Signaling Technology cat# 3682S), anti-Mst2 (Cell Signaling Technology cat# 3952S), and anti-actin (Sigma cat# A3854). Proteins were visualized with the Odyssey imaging system (LI-COR Biosciences).
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4

Cell Line Authentication and Validation

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C4-2B4, DU145, LNCaP, PC3, HEK293, 293FT, and Phoenix cells were from American Type Culture Collection. PC3-mm2 was kindly provided by Dr. Isaiah Fidler (University of Texas, M. D. Anderson Cancer Center). All the cell lines were authenticated by short tandem repeat DNA profiling. Anti-YAP, anti-phospho-YAP (Ser127), anti-LATS1, anti-phospho-LATS1 (Thr1079), anti-MST1, anti-MST2, anti-ERK1/2, anti-phospho-ERK1/2 (Thr202/Tyr204), and anti-lamin A/C were from Cell Signaling Technology (Boston, MA).
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5

Protein Expression Analysis in Liver Tissue

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The liver tissues were homogenized in RIPA buffer (Thermo Fisher) to harvest proteins. Total protein was resolved on TGX gradient gels (BioRad). The following primary antibodies were used: anti-β-actin (Sigma), anti-a-catenin (Cell Signaling), anti-cyclin D1 (Millipore), anti-Mst1 (Cell Signaling), anti-Mst2 (Cell Signaling), anti-NF2 (Sigma), anti-p21 (Santa Cruz), anti-pYap1 (Cell Signaling), anti-Yap1, phospho-pH2A.X. (Abcam) Licor Odyssey Imaging system was used to visualize protein bands. Gray scale images were quantified with ImageJ as described previously(24 (link)).
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6

Immunoblot Analysis of Cellular Signaling

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Gels for SDS-PAGE or Phos-tag SDS-PAGE were prepared according to the manufacturer’s instructions (NARD Institute). Separated proteins were transferred onto a PVDF membrane and then were identified by immunoblot analysis with the appropriate primary antibodies at a dilution of 1:1000 (or as otherwise stated below). Antibody to Mob1 phosphorylated at Thr35 (1:2000 dilution; 8699), anti-Mob1 (1:2000 dilution; 13730), anti-Mst1 (1:2000 dilution; 3682), anti-Mst2 (1:2000 dilution; 3952), anti-GAPDH (1:5000 dilution; 5174), antibody to phosphorylated p38 (1:3000 dilution; 9211), antibody to phosphorylated Jnk (1:3000 dilution; 4668), and anti-β-actin (1:5000 dilution; 8457) were from Cell Signaling Technology. Anti-Rac1 (66122-1-Ig), anti-HA Rabbit (51064-2-AP), and anti-Flag Rabbit (1:3000 dilution; 20543-1-AP) were from Proteintech. Anti-gamma Tubulin (1:5000 dilution; ab11316) was from Abcam and anti-Flag Mouse (1:5000 dilution; sc-166355) was from Santa Cruz Biotechnology. The protein bands were visualized with a SuperSignal West Pico Kit according to the manufacturer’s instructions (Thermo Fisher Scientific Pierce).
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7

Immunoblotting of Mst1 and Mst2

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Cells were lysed with radioimmunoprecipitation assay (RIPA) buffer (Thermo Fisher Scientific) containing cOmplete protease inhibitor (Sigma) and frozen. Equal amounts of protein were separated on 4%–12% bis-Tris NuPage gels and transferred to polyvinylidene fluoride (PVDF) membranes (Thermo Fisher Scientific). Immunodetection was performed using anti-Mst1 (Cell Signaling Technology cat# 3682S), anti-Mst2 (Cell Signaling Technology cat# 3952S), and anti-actin (Sigma cat# A3854). Proteins were visualized with the Odyssey imaging system (LI-COR Biosciences).
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