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2 protocols using amelx

1

Enamel Cell Lysate Western Blot

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Total lysates of primary secretory and maturation enamel cells were prepared in Ripa Buffer (Thermo Fisher Scientific), Protease cocktail inhibitor 100X (Thermo Fisher Scientific), Laemli buffer 4X (BioRad) and β-mercaptoethanol (BioRad) and then loaded at the concentration of 5 μg in 10% SDS-polyacrylamide resolving gels (BioRad). Lysates of HEK-293 cells were prepared as above and used as a negative control. Nitrocellulose membranes were saturated with fat-free milk 5% in TBS (Tris-HCl 50 mM, NaCl 150 mM, pH 7.5) Tween 0.1% for 1 h at room temperature and probed with antibodies against Amelogenin (AMELX, Santa Cruz Biotechnology, sc-32892) and β-Actin (Santa Cruz Biotechnology, sc-47778). Signals were amplified and visualized with horseradish peroxidase-conjugated secondary antibody (Bio-Rad) and enhanced chemiluminescence detected by the Bio-Rad ChemiDoc gel documentation setup. Images of the acquired Western blots were analyzed using the ImageJ software.
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2

Immunohistochemical Analysis of Dental Tissues

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The specimens were embedded in wax using conventional methods. Sections (4 μm thickness) of the specimens were boiled in 10 mM citrate buffer (pH 6.0) for 20 min and cooled at room temperature for 20 min. The specimens were incubated with primary antibodies against HIF-1α (Abcam, CAM, UK; dilution 1:200), phosphorylated p53 (Cell signaling; dilution 1:100), cleaved Caspase-3 (Cell signaling, MA, USA; dilution 1:100), PCNA (Abcam; dilution 1:200), Glut-1(Abcam; dilution 1:200), Glut-2 (Novus biologicals, CR, USA; dilution 1:200), MMP20 (Abcam; dilution 1:200), Amelx (Santa Cruz Biotechnology, TX, USA; dilution 1:200), Dmp1 (LSBio, WA, USA; dilution 1:200), Dspp (Santa Cruz Biotechnology; dilution 1:200) at 4°C overnight. The specimens were incubated with goat anti-rabbit Alexa Fluor 488 (Thermo Fisher Scientific, MA, USA; dilution 1:200), goat anti-mouse Alexa Fluor 555 (Thermo Fisher Scientific; dilution 1:200) antibodies. The sections were counterstained with DAPI (Molecular Probes, OR, USA, dilution 1:1,000) and examined using a confocal laser microscope (DMi8; Leica, Wetzlar, Germany).
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