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6 protocols using anti β catenin c2206

1

Comprehensive Immunostaining of Frozen Tissues

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Frozen skin tissue sections were incubated with different primary antibodies at 4 °C overnight; antibodies included anti-CD49f-biotin (GoH3, 1:150, BioLegend), anti-Ki67 (20Raj1, 1:100, eBioscience), anti-Akt (GTX28932, phospho Ser473, 1:150, GeneTex), anti-Akt (Akt 1+2+3) (GTX121937, 1:150, GeneTex), anti-CD34-biotin (RAM34, 1:150, eBioscience), anti-Lgr-5 (ab137484, 1:200, Abcam), anti-CD45 (30-F11, 1:150, BioLegend), anti-CD45-Biotin (30-F11, 1:150, BioLegend), anti-F4/80-Biotin (BM8, 1:150, BioLegend), anti-F4/80 (BM8, 1:150, BioLegend), anti-Ly6C-Biotin (RB6-8C5, 1:200, BioLegend), anti-Ly6C (HK1.4, 1:200, BioLegend), anti-MHC II (14-4-4S, 1:200, eBioscience), anti-TNF-α (1F3F3D4, 1:100, eBioscience), anti-TNFR1-Biotin (55R-170, 1:100, BioLegend), anti-β-catenin (C2206, 1:150, Sigma) and anti-Phospho-β-Catenin (Ser552) (5651S, 1:100, CST Signaling). Secondary antibodies with different fluorescence conjugates (FITC, Cy3/TRITC and Alex Fluor 647) were used for detection, and cells were visualized with an Olympus FV1000 confocal microscope.
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2

Immunohistochemical Analysis of PAR2-Induced Mammary Gland Tissue

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Tissue samples derived from PAR2 induced mammary glands were fixed with 4% formaldehyde in PBS, embedded in paraffin, and sectioned (5-μm sections). After deparaffinization and rehydration, the sections were stained with H&E or subjected to immunohistochemistry. For this, the slides were incubated 3% H2O2 prior to antigen retrieval. Antigen unmasking was carried out heating (20 min) in a microwave oven in 10mM Tris buffer containing 1mM EDTA. After blocking slides were incubated with the following primary antibodies: anti β-catenin (C-2206, Sigma-Aldrich St Louis MO, USA), anti PCNA (sc-56, Santa Cruz Biotechnology, USA dilution 1:200) anti DVL1 (sc7397, Santa Cruz Biotechnology, Dallas Texas, USA; goat polyclonal IgG) or anti CD31 (Dako, Clone JC70A, Carpinteria, CA). Color was developed using the 3,3′-diaminobenzidine (DAB) (Thermo Scientific, Walham, MA, USA) or the Zymed AEC substrate kit (Zymed Laboratories So, San-Francisco, CA, USA), followed by counter staining with Mayer's haematoxylin. Controls without addition of primary antibodies showed low or no background staining in all cases.
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3

Protein Extraction and Western Blotting

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Lung tissue protein extracts were obtained from mouse lungs homogenized in tissue protein extraction lysis buffer containing a cocktail of 1 M HEPES, 5 M NaCl, 10% Triton X-100, 1 M DTT, 0.5% EDTA, 20 mM NaVO3, 10 mM PMSF, 0.5 M Na-β-glycerophosphate and protease inhibitors using Qiagen TissueLyser LT (Qiagen), while NSCLC cells were lysed in a lysis buffer (MAP kinase lysis buffer), and the western blotting analysis was carried out as previously described.18 (link), 19 (link) Anti-β-actin (A3853) and anti-β-catenin (C2206) were purchased from SIGMA (Sigma-Aldrich, St Louis, MO, USA). Anti-Caspase 3 (9662S), anti-Skp2 (4313S), anti-p27kip (2552S), anti-Cdk6 (3136S), anti-CyclinD1 (2922S), anti-LC3A/B (4108S) anti-p-pRB (3590S) were purchased from Cell Signaling (Cell Signaling Technology Inc., Danvers, MA, USA) and anti-Wnt7a (SC26360) was purchased from Santa Cruz Biotechnology. Densitometric analysis was performed using the ImageJ software (NIH, Bethesda, MD, USA). Band intensities were normalized to their corresponding controls and are represented in the figures.
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4

Protein Extraction and Western Blot Analysis

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Lung tissue protein extracts were obtained from mouse lungs homogenized in tissue protein extraction lysis buffer containing a cocktail of 1M HEPES, 5M NaCl, 10% Triton X-100, 1M DTT, 0.5% EDTA, 20mM NaVO3, 10mM PMSF, 0.5M Na-β-glycerophosphate and protease inhibitors using Qiagen TissueLyser LT (Qiagen, Venlo, Limburg), while NSCLC cells were lysed in a lysis buffer (MAP kinase lysis buffer) and the western blot analysis was carried out as previously described (18 (link), 19 (link)). Anti-β-actin (A3853) and anti-β-catenin (C2206) were purchased from SIGMA (Sigma-Aldrich, St. Louis, MO). Anti-Caspase 3 (9662S), anti-Skp2 (4313S), anti-p27kip (2552S), anti-Cdk6 (3136S), anti-CyclinD1 (2922S), anti-LC3A/B (4108S) anti-p-pRB (3590S) were purchased from Cell signaling (Cell signaling Technology Inc, Danvers, MA) and anti-Wnt7a (SC26360) was purchased from Santa Cruz Biotechnology (Santa Cruz Biotechnology, Santa Cruz, CA). Densitometric analysis was performed using ImageJ software. Band intensities were normalized to their corresponding controls and are represented in the figures.
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5

Quantification of Intestinal Polyp Subpopulations

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Dissected intestinal tissues were fixed with 4% paraformaldehyde, embedded in paraffin wax and sectioned at a thickness of 4 µm at 40 µm intervals throughout the tissue block and stained with anti-β-catenin (c2206; Sigma-Aldrich) antibodies. Polyps were categorized as β-catenin-positive or β-catenin-negative and scored for numbers.
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6

Phosphoprotein Profiling of HK-2 Cells

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Total cellular protein (3 mg) from HK‐2 cells were incubated with an anti‐Dpr1 antibody (ABCAm; ab51260) and Protein G Plus Agarose (Santa Cruz Biotechnology; sc‐500778) at 4°C overnight. After washing, Ser/Thr‐phosphorylated proteins were isolated using a phosphorylation purification kit according to the manufacturer's instructions (Qiagen, Life Technologies; 37145). The purified protein concentration was adjusted to 0.1 mg/mL; a 30‐µL aliquot was used for Western blotting. Western blotting was performed using an anti‐phosphoserine/threonine antibody (Sigma‐Aldrich; P3430).
For Western blotting, protein concentrations were determined using BCA (Life Technologies; 23227). The anti–E‐cadherin (#3195), anti–N‐cadherin (#13116), anti‐cyclin D1 (#2978), anti–β‐tubulin (#86298), anti–phospho‐β‐catenin (Ser33/37/Thr41) (#9561) and anti‐Dvl2 (#3224) antibodies were from Cell Signaling Technology. The anti‐collagen IV (ab6586) antibody was from ABCAm. The anti‐GSK3β (sc‐71186) and anti–phospho‐GSK3β (Ser9) (sc‐11757) antibodies were from Santa Cruz Biotechnology. The anti–β‐catenin (C2206) and anti‐cyclin G2 (HPA034684) antibodies were from Sigma‐Aldrich, and the anti‐MMP7 (10374‐2‐AP) antibody was from Proteintech. All experiments were performed in triplicate.
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