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3 protocols using nb100 74350

1

Immunohistochemical Analysis of Cartilage Markers

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IHC assay was applied to detect the expressions of β-catenin, type II collagen (Col-II), matrix metalloproteinase 13 (MMP13), aggre-can neoepitope (ACAN) in articular cartilage. Sections were incubated in citrate buffer (0.01 M, pH 6.0, Cat. no. C1010; Solarbio, Beijing, China) at 60°C for 4 hr or Pepsinum (Cat. no. ZLI-9013; ZSGB Biotechnology, Beijing, China) at 37°C for 30min as antigen retrieval. After that, sections were incubated with primary antibodies of Col-II (diluted 1:1,000, ab34712; Abcam, Cambridge, UK), MMP13 (diluted 1:200, ab39012; Abcam), aggrecan (diluted 1:200, ab76956; Abcam), ACAN (diluted 1:200, NB100–74350; Novus, Oakville, Canada) and β-catenin (diluted 1:500, ab32572; Abcam) overnight at 4°C. Second goat antimouse/rabbit antibody (diluted 1:1,000) was added for 20 min, and diaminobenzidine solution was used for detecting positive staining while hematoxylin for counterstaining. A total of four randomly selected fields from at least three different tissue sections were selected for quantification of positive staining. The mean optical density defining as the ratio of integrated optical density to the corresponding cavity area and the rate of the positive cells were evaluated using Image-Pro Plus Software (Media Cybernetics, Silver Spring, MD).
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2

Western Blot Analysis of Metabolic Proteins

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Samples were separated by SDS-PAGE, transferred to PVDF membrane, and blocked by 5% skimmed milk solution as previously described [40 (link),42 (link),76 (link)]. The following primary antibodies were used overnight in 1% skimmed milk solution: anti-UCP1 (1:750, R&D Systems, MAB6158), anti-pCREB (1:1000, Merck-Millipore, Burlington, MA, USA, 05-667), anti-CREB (1:1000, Abcam, Cambridge, UK, ab31387), anti-PGC1α (1:1000, Santa Cruz Biotechnology, Dallas, TX, USA, H-300), anti-CKMT2 (1:1000, Novus Biologicals, Centennial, CO, USA, NBP2-13841), anti-CKB (1:1000, Novus Biologicals, NBP1-84460), anti-CRYAB (1:1000, Novus Biologicals, NB100-2519), anti-β actin (1:5000, Novus Biologicals, A2066), anti-OXPHOS (1:1000, Abcam, ab110411), anti-Aggrecan (1:1000, Novus Biologicals, NB100-74350), and anti-ID1 (1:1000, Novus Biologicals, JM92-13). HRP-conjugated goat anti-rabbit (1:10,000, Advansta, San Jose, CA, USA, R-05072-500) or anti-mouse (1:5000, Advansta, R-05071-500) IgG were used as secondary antibodies, respectively. Immunoreactive proteins were visualized by Immobilion Western chemiluminescence substrate (Merck-Millipore). Densitometry was carried out by FIJI.
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3

Immunohistochemical Analysis of Articular Cartilage

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IHC assay was applied to detect the expressions of β‐catenin, type II collagen (Col‐II), matrix metalloproteinase 13 (MMP13), aggrecan neoepitope (ACAN) in articular cartilage. Sections were incubated in citrate buffer (0.01 M, pH 6.0, Cat. no. C1010; Solarbio, Beijing, China) at 60°C for 4 hr or Pepsinum (Cat. no. ZLI‐9013; ZSGB Biotechnology, Beijing, China) at 37°C for 30 min as antigen retrieval. After that, sections were incubated with primary antibodies of Col‐II (diluted 1:1,000, ab34712; Abcam, Cambridge, UK), MMP13 (diluted 1:200, ab39012; Abcam), aggrecan (diluted 1:200, ab76956; Abcam), ACAN (diluted 1:200, NB100‐74350; Novus, Oakville, Canada) and β‐catenin (diluted 1:500, ab32572; Abcam) overnight at 4°C. Second goat anti‐mouse/rabbit antibody (diluted 1:1,000) was added for 20 min, and diaminobenzidine solution was used for detecting positive staining while hematoxylin for counterstaining. A total of four randomly selected fields from at least three different tissue sections were selected for quantification of positive staining. The mean optical density defining as the ratio of integrated optical density to the corresponding cavity area and the rate of the positive cells were evaluated using Image‐Pro Plus Software (Media Cybernetics, Silver Spring, MD).
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