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3 protocols using a25012

1

Osteosarcoma Cell Lines and Antibody Specifications

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The human osteosarcoma cell lines MG63, MNNG-HOS and Saos-2 were purchased from the Cell Bank of the Chinese Academy of Sciences (Shanghai, China). The human osteosarcoma cell line U-2OS was purchased from the American Type Culture Collection (ATCC, Manassas, VA, USA). These cell lines were cultured following the ATCC protocols. Standardized culture conditions had been described previously [18 (link)].
The antibodies used were S1PR3 (ab126622; Abcam, Cambridge, UK), YAP (ab52771; Abcam, Cambridge, UK), p-YAP (ab76252; Abcam, Cambridge, UK), c-Myc (ab32072; Abcam), Ki67 (GB13030; Servicebio, Wuhan, China), β-actin (M1210-2; Hua'an Biology, Chuzhou, China), GAPDH (bsm-33033M; Bioss, Beijing, China), anti-rabbit IgG light chain (ab99697, Abcam), anti-rabbit IgG heavy chain (ab99702, Abcam), and anti-mouse IgG light chain (A25012, Abbkine, CA, USA).
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2

Protein Interaction Verification Techniques

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Both Western blot and co-immunoprecipitation were performed as described previously [25 (link)]. For whole-cell extracts, cells were lysed with 20 mM Tris·HCl, pH 8.0, 100 mM NaCl, 0.5% NP-40, and 1 mM EDTA (NETN buffer) supplemented with Micrococcal Nuclease (1:5000, M0247S, NEB) on ice for 15 min. Cell lysates were boiled with 5× SDS loading buffer, separated by SDS-PAGE, transferred to polyvinylidene fluoride membranes, and immunoblotted with indicated antibodies. For co-IP experiments, cells were lysed with NETN buffer for 15 min on ice, followed by centrifugation at 12,000 rpm for 10 min at 4 °C. Supernatants were then transferred into new Eppendorf tubes and incubated with either Flag beads (L00425, GenScript) for 4 h or Protein A/G plus agarose beads (sc-2003, Santa Cruz) conjugated with indicated antibodies overnight at 4 °C with rotation. Beads were subsequently washed three times with NETN buffer and boiled with 1× SDS loading buffer. To avoid the noise of light/heavy chains, the secondary antibodies used for the immunoprecipitation assays including mouse anti-rabbit IgG LCS (A25022, 1:5000) and goat anti-mouse IgG LCS (A25012, 1:5000) were obtained from Abbkine.
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3

Western Blot Analysis of FTO and NOD1

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Cellular lysates were generated by using 1×SDS-PAGE loading buffer. Proteins were extracted from cells and measured with the BCA Protein Assay kit (Beyotime; P0012S), then subjected to SDS-PAGE (8%) gel and transferred to PVDF (Millipore; ISEQ00010) membranes by semidry blotting (Bio-Rad Trans Blot Turbo System). The membranes were blocked with 5% BSA. Protein was blotted with different antibodies. The antibody against FTO was diluted at 1: 500 (Beyotime; AF6936); The antibody against NOD1 was diluted at 1: 1000 (Customized by Genscript); The antibody against NOD1 of human was diluted at 1: 1000 (Absin; abs115515); Anti-Flag (Beyotime; AF519) and anti-Tubulin (Beyotime; AT819) monoclonal antibody were diluted at 1: 2,000; and HRP-conjugated anti-rabbit IgG (Abbkine; A25022) or anti-mouse IgG (Abbkine; A25012) at 1: 5,000. The results were the representative of three independent experiments. The immunoreactive proteins were detected by using WesternBrightTM ECL (Advansta). The digital imaging was performed with a cold CCD camera.
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