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3 protocols using gant58

1

Chondrocyte signaling pathway regulation

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Antler chondrocytes were isolated by enzymatic digestion as previously described20 and cultured with DMEM‐high glucose (Hyclone) supplemented with 10% foetal bovine serum (Life Technologies). These cultured chondrocytes were treated with recombinant human/mouse/rat TGFβ1 protein (rTGFβ1, 100 ng/mL; R&D Systems) in the absence or presence of TGFβ receptor inhibitor SB431542 (10 µmol/L, MCE), Smad3 inhibitor SIS3 (10 µmol/L; Selleck), Notch signalling inhibitor DAPT (25 µmol/L; Sigma), Smo antagonist cyclopamine (10 µmol/L; Tocris Bioscience) and Gli1 antagonist GANT58 (10 µmol/L; Tocris Bioscience), respectively. Additionally, chondrocytes were incubated with SB431542 or SIS3 and then supplemented recombinant human Shh protein (rShh, 25 ng/mL; R&D Systems).
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2

Hedgehog Signaling Pathway Assay

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Recombinant hedgehog (Shh) was purchased from R&D System (Minneapolis, MN), while Gant 58 was purchased from Tocris Bioscience (Ballwin, MO).
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3

Antibody Specifications and Peptide Details for Methylated Gli1 Analysis

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The antibodies used in this study were Gli1 (#3538, Cell Signaling Technology, for western blotting and chromatin immunoprecipitation (ChIP) assay, and#sc-20687, Santa Cruz Biotechnology, for immunohistochemistry), actin (#A2066, Sigma-Aldrich), Flag (#F3165, Sigma-Aldrich), Flag M2 magnetic beads (#M8823, Sigma-Aldrich), PRMT1 (#2449, Cell Signaling Technology), and tubulin (#T5168, Sigma-Aldrich). GDC-0449, NVP-LDE225, and RAD-001 were purchased from Selleck Chemicals LLC, GANT58 and GANT61 from Tocris Bioscience, and AMI-1 from Sigma-Aldrich. The SYBR Green real-time PCR kit was obtained from Bio-Rad and TGF-β from Peprotech (#100-21). The antibody against R597-methylated Gli1 was developed using the following synthetic peptide with asymmetric dimethylation at R597 as antigen: RARYASA-[R597(aMe2)]-GGGTS (C-terminal amidation and N-terminal KLH conjugation). Other peptides used in the study included the following:

Cold Gli1 peptide without R597 methylation [Gli1-R597]: RARYASA-[R597]-GGGTS;

Hot Gli1 peptide with R597 monomethylation [Gli1-R597(Me)]: RARYASA-[R597(Me)] -GGGTS;

Hot Gli1 peptide with R597 asymmetric dimethylation [Gli1-R597(aMe2)]: RARYASA-[R597(aMe2)]-GGGTS;

Hot Gli1 peptide with R597 symmetric dimethylation [Gli1-R597(sMe2)]: RARYASA-[R597(sMe2)]-GGGTS.

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