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P0202

Manufactured by Beyotime
Sourced in China

The P0202 is a laboratory equipment designed for general use in scientific research and analysis. It serves as a device for measuring and analyzing various physical or chemical properties of samples. The core function of the P0202 is to provide accurate and reliable data to support scientific investigations and experiments.

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4 protocols using p0202

1

Collagen-II Expression in HNPCs

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In the light of a previous delineation, the expression of Collagen-II was observed through ICC [30 (link)]. The treated HNPCs were collected and washed with PBS, and then fixed with 4% paraformaldehyde at room temperature for 15 min. Next, cells were treated with 0.2% of Triton X-100 (P0096, Beyotime, Shanghai, China) for 10 min, and incubated firstly with 10% goat serum (C0265, Beyotime, Shanghai, China) for 20 min, and then with the diluted primary antibody (Collagen II Monoclonal Antibody; MA1-37,493, Thermo Fisher Scientific, Waltham, Massachusetts, USA) at 4°C overnight. Subsequently, cells were incubated with the diluted secondary antibody (Rabbit Anti-Mouse IgG H&L; ab6728, Abcam, Cambridge, UK) at room temperature for 1 h. Later, the cells were treated with DAB working solution (P0202, Beyotime, Shanghai, China), and then washed with distilled water. Lastly, the Collagen-II content of cells was observed (under 200 × magnification) using fluorescence microscope (N-STORM, Nikon, Tokyo, Japan).
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2

Immunohistochemical Analysis of Colon Tissue

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Paraffin‐embedded colon tissue sections (5 μm) were dewaxed, rehydrated, treated with 3% H2O2, heat‐bathed in citrate buffer for antigen retrieval, and blocked with normal goat serum. Subsequently, the sections were incubated with antibodies of mucin 3 (MUC3; 1:500, PAB031Mu01; Cloud‐Clone Corp.), Claudin‐1 (1:500, ab211737; Abcam Inc.), and tight junction protein 1 (ZO‐1, 1:500, ab276131; Abcam) overnight at 4°C, followed by incubation with goat anti‐rabbit IgG (1: 1,000, ab6721; Abcam) at 37°C for 20 min. The sections were then treated with horseradish peroxidase (HRP)‐labeled streptavidin‐working solution (A0303; Beyotime) and developed by DAB (P0202; Beyotime). Following counter‐staining with hematoxylin, the sections were observed under a microscope to calculate the number of positive cells in five randomly selected fields.
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3

Histological Examination of Paraffin-Embedded Tissues

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The fixed tissue samples were embedded in paraffin. The paraffin blocks were sliced to a thickness of 4 μm. The EGTA (MVS-0098, Maxim biotechnologies, Fuzhou, China) was used for antigen repair. For histochemistry, F4/80 (28463-1-AP, Proteintech, Wuhan, China), MPO (SKU:023, Biocare Medical, Pacheco, CA, USA), VWF (A0082, DAKO, Glostrup, Denmark), and ITGB3 (MWReg30, BioLegend, San Diego, CA, USA) were used. The sections were incubated with the antibodies at 4 °C overnight. The sections were incubated with anti-rabbit IgG (#7074, Cell Signaling, Danvers, MA, USA) or anti-rat IgG (ab6734, Abcam, Cambridge, UK) for 1.5 h at room temperature and stained with DAB substrate (P0202, Beyotime, Shanghai, China). For immunofluorescence, the sections were incubated with ITGB3 (MWReg30, BioLegend, San Diego, CA, USA) overnight at 4 °C and then incubated with VWF (A0082, DAKO, Glostrup, Denmark) for 2 h at room temperature. For fluorescent staining, the sections were incubated with an Alexa 594-conjugated secondary anti-rat IgG antibody (ab150160, Abcam, Cambridge, UK) and an Alexa 488-conjugated secondary anti-rabbit IgG antibody (ab150077, Abcam, Cambridge, UK). The optical microscope and laser scanning confocal microscope were used to take images. The software ImageJ was used for quantifying the histochemistry staining.
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4

Quantitative Analysis of FTO, Vimentin, and E-cadherin Expression in ESCC

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Tissue arrays were constructed using 28 pairs of human ESCC and corresponding paracancerous tissues, as well as nude mouse specimens. Paraffin-embedded sections and immunohistochemical staining were performed on all specimens to detect the expression of FTO for human ESCC and paracancerous tissues, and the expression of Vimentin and E-cadherin, for nude mouse specimens. In short, the slides were incubated overnight with the appropriate antibody at 4 °C and the secondary antibody at room temperature for 2 h. Then, Subsequent steps were performed using the immunohistochemical kit (Beyotime, FD008) and peroxidase (Beyotime, P0202). The intensity of staining was the staining intensity was detected using the IMAGE-PRO PLUS 6.0 software (Media Cybernetics, Silver Spring, MD, USA). Specific steps: (1) finding and measuring the section of interest; (2) adjusting the optical density; (3) acquiring, converting and saving the image; (4) correcting the background and background staining; (5) configuring the section of interest to determine the light density; (6) Checking the optical density. The positive staining in images was quantified as integral optical density (IOD)/area, that is, mean density = density sum/area sum [36 (link)].The relevant clinical information was provided in Table S1.
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