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3 protocols using β catenin h 102 sc 7199

1

Antibody Characterization for Signaling Pathways

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Anti‐HA (sc‐805), Myc (sc‐40), Peli3 (sc‐376466), IRF4 (sc‐130921), PCNA (sc‐56), His (H‐3; sc‐8036), Ub (sc‐8017) and β‐catenin (H‐102; sc‐7199) antibodies were obtained from Santa Cruz (Santa Cruz, CA, USA). Antibodies against total IκBα (sc847), phospho‐IκBα (9246), Erk1/2 (9102), phospho‐Erk1/2 (9101), STAT3 (9132), and phosphor‐STAT3 (9145) were purchased from Cell Signaling (Danvers, MA, USA). Anti‐β‐actin (AC‐15, A1978), Flag (F3165) and LPS were obtained from Sigma‐Aldrich (St. Louis, MO, USA).
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2

Immunofluorescence Analysis of Cadherin and Catenin Proteins

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Cells cultured on glass coverslips were rinsed several times in Ca2+- and Mg2+-containing PBS, fixed in 4% paraformaldehyde (PFA) for 10 min at 37°C, and permeabilized in 4% PFA containing 0.1% Triton X-100 for 1 min at room temperature. After blocking in 4% Block Ace solution (Yukijirushi Inc., Sapporo, Japan), the cells were incubated for 1 hr separately with primary antibodies: OB-cadherin (#4442; Cell Signaling Technology, Beverly, MA, USA) at 1:100 dilution; and EPLIN (16639-1-AP; Proteintech, Rosemont, IL, USA), β-catenin (H102 sc-7199; Santa Cruz, Dallas, TX, USA) and α-catenin (anti-α1 catenin antibody EP1793Y; Abcam, Cambridge, UK) all at a dilution of 1:50. After washing, bound antibodies were detected using Alexa Fluor 488-labeled anti-rabbit secondary antibody (Thermo Fisher Scientific) for 30 min. Then, F-actin (Phalloidin, Thermo Scientific) was stained in all slides. Cell nuclei were stained with DAPI (SlowFade Gold Antifade Mountant with DAPI; Thermo Fisher Scientific). As a negative control, normal rabbit IgG was used at the same concentration instead of the primary antibody in each experiment. Microphotos were taken using a fluorescence microscope (BZ-9000; Keyence, Osaka, Japan).
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3

Investigating Molecular Markers in UVB-Treated Cells

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After treating the HCT116 cells with UVB1, calcitriol or vehicle, they were lysed in lysis buffer containing 2% TRIS 1M, 1% Triton-X 100, 0.5 M EDTA 0.5 M, 2% sodium chloride 1M for 30 min on ice and the protein concentration was determined by Bradford assay by using a Jasco V-630 spectrophotometer. Lysates were prepared to examine the expression of Bax (N-20, sc-493, 1:100; Santa Cruz Biotechnology), Cyclin D1 (SR4, 1:1,000; Thermo Scientific), Cyclin E (M-20, sc-481, 1:500; Santa Cruz Biotechnology), VDR (1:750; Santa Cruz Biotechnology), E-cadherin (H-108, sc-7870, 1:500; Santa Cruz Biotechnology) and β-catenin (H-102, sc-7199, 1:1,000; Santa Cruz Biotechnology). The same amount of protein was separated by SDS-PAGE and transferred to PDVF membranes (Millipore). Membranes were subsequently blocked for 30 min at room temperature and further incubated at 4°C overnight with primary antibodies. Then, membranes were washed and incubated with the appropriate HRP-conjugated secondary antibodies (Santa Cruz Biotechnology) for 90 min at room temperature. Protein bands were visualized using the enhanced chemiluminescence method. Relative protein levels were calculated by normalization to the amount of actin protein (C-11, sc-1615, 1:1,000; Santa Cruz Biotechnology). Data shown are representative of three independent experiments.
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