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31 protocols using anti tnf α antibody

1

Immunohistochemical Evaluation of Inflammatory Markers

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Paraffin-embedded sections of formalin-fixed tissue specimens were degreased with xylene and rehydrated using a gradient series of alcohols. Heat-induced antigen retrieval was performed after blocking with PBS containing 10% fetal bovine serum. The sections were then treated by incubation with primary and secondary antibodies. Immunohistochemical staining was performed with 3,3’-diaminobenzidine. Primary antibodies were as follows: anti-integrin αvβ6 antibody (Cell Signaling Technology or Millipore Sigma), anti-IL-6 antibody (Abcam), anti-IL-1β antibody (Abcam), anti-TNF-α antibody (Abcam), anti-COX-2 antibody (Abcam) and anti-Ki-67 antibody (Abcam). For the assessment of immunostaining, the immunoreactivity score was determined by multiplying the percentage of positively stained cells and the staining intensity (ranging from 0 to 12). The percentage of positivity was ranked as follows: 0, 0%; 1, 1-10%; 2, 11-50%; 3, 51-75%; 4, >75%. Staining intensity was graded as follows: 0, none; 1, weak; 2, moderate; 3, strong.
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2

Immunohistochemical Analysis of Inflammatory Markers

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Five sections (5 μm in thickness) from each group were cut and adhered to slides treated with 3-aminopropyltriethoxysilane (APES (Sigma, USA)). Briefly, sections were deparaffinized with xylene and rehydrated in graded ethanol (100 to 70%). To minimize endogenous peroxidase activity, the slides were treated with 10% (v/v) H2O2 in water for fifteen minutes. The sections were washed with 0.01 M PBS (pH 7.2) and then blocked with 1% BSA, 0.2% Tween 20 in PBS for 1 h at room temperature. The sections were incubated overnight at 4°C with anti-TNF-α antibody (ABCAM, CA, USA, 1 : 250), anti-IL-1β antibody (GenWay, San Diego, CA, USA, 1 : 250), anti-COX-2 antibody (ABCAM, CA, USA, 1 : 400), and anti-iNOS (ABCAM, CA, USA, 1 : 50). The antigen-antibody reaction was visualized with avidin-biotin peroxidase (Dako Universal LSAB + Kit, Peroxidase), using 3,3-diaminobenzidine as the chromogen. The slides were counterstained with hematoxylin. Positive staining resulted in a brown reaction product. Five pictures at the same magnification were quantitatively analyzed using the Gimp 2.6 software program (GNU Image Manipulation Program, UNIX platforms).
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3

Histological Analysis of Lung Tissues

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Lung tissues were routinely fixed in 4% formalin, processed in graded alcohol and xylene, and embedded in paraffin. Paraffin blocks were sectioned into 5 μm thick sections. After rehydration, the sections were stained with hematoxylin and eosin (H&E assay kit, Beyotime, Shanghai, China).
For immunohistochemistry, paraffin was removed from the sections with xylene, rehydrated in graded alcohol series, subjected to antigen retrieval in 0.01 mol/L citrate buffer (pH 6.0) by microwaving, and then placed in 3% hydrogen peroxide in methanol for 30 min at room temperature. After blocking with 5% BSA (Sigma, USA), the sections were incubated with anti-TNF-α antibody (1 : 500, Abcam, USA) or anti-CD68 (1 : 500, Abcam, USA) overnight at 4°C, followed by the secondary antibody (1 : 200; Santa Cruz, USA). The reaction was visualized with DAB (ZSGB-Bio, Beijing, China), counterstained with hematoxylin, dehydrated, and viewed under a Nikon fluorescence microscope (200x amplification, Nikon, Japan).
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4

Histological Analysis of NAFLD in Mice

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Paraffin-embedded sections from mouse livers were stained with hematoxylin and eosin (HE). Histological evaluations were performed employing the histological scoring system for NAFLD37 (link). Oil Red-O staining was performed on frozen liver sections. Immunohistochemical staining with anti-Collagen α 1 antibody (Abcam, Cambridge, MA, USA), anti-αSMA antibody (Abcam), anti-F4/80 antibody (Abcam), or anti-TNF-α antibody (Abcam) was performed by SRL Co. Ltd (Tokyo, Japan). Immunohistochemical staining with mouse RELMβ of the liver sections was performed using anti-mRELMβ antibody (Abcam), and simple stain mouse MAX-PO (R) (Nichirei, Tokyo, Japan) was used as the secondary antibody. Immunofluorescence staining was performed using rat anti-mouse F4/80 antibody (Serotec, Oxford, UK) and anti-mRELMβ antibody. Alexa-Fluor 546 and 488 (Invitrogen, CA, USA) were used as the secondary antibodies. Digital images of lesions were randomly selected and positive cells were counted using a multifunctional microscope (BZ-9000; KEYENCE Co, Osaka, Japan), Image-J (National Institute of Health, MD, USA) or FSX 100 Olympus Microscope (Olympus America Inc., Center Valley, PA).
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5

Isolation and Characterization of LR Anthocyanin

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The D-galactose (DG) was purchased from Sigma-Aldrich (USA). The LR anthocyanin (LRA) sample was prepared as we described previously [15 (link)]. Briefly, the anthocyanins were obtained from dried LR fruit by ultrasound-assisted extraction using 40-fold 80% ethanol (extracted for 1 h and repeated three times). The extract was concentrated, purified with AB-8 macroporous resin, and dried by lyophilization. The LRA sample was stored at −20 °C. The purity of the anthocyanin was 87.54% of the sample, which was calculated by the pH-differential method. The anti-TNF-α antibody was obtained from Abcam Plc (Cambridge, UK) and the fluorescent anti-rabbit secondary antibody was purchased from Invitrogen Corporation (Carlsbad, USA).
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6

Protein Expression Analysis of TIM-3, TNF-α, and IFN-γ

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The normal tissues and adjacent paracancerous and cancerous tissues were lysed with ice-cold RIPA buffer containing protease inhibitor, in accordance with the manufacturer's protocol applying the bicinchoninic acid assay (BCA) (Thermo Scientific, USA) methods for total protein, using BSA as standards. Meanwhile, the proteins were denatured at 100°C for 5 min. A total of 30 ng of proteins was separated in 12.5% SDS-PAGE and transferred to a PVDF membrane. Then, it was blocked with 5% skim milk for 2 h. The following antibodies were used in the study: rabbit anti-TIM-3 antibody (ABCAm, USA), anti-TNF-α antibody (ABCAm, USA), anti-IFN-γ antibody (ABCAm, USA), and mouse anti-β-actin antibody (Proteintech, China). The PVDF membranes were incubated with TIM-3, TNF-α, IFN-γ, and β-actin primary antibodies at 4°C overnight. The secondary antibodies (CST, USA) were used to incubate with the membranes for 1 h at room temperature. After washing with TBST, the membranes were visualized in ECL developing solution. Band intensity was scanned by ImageJ software. Quantification was determined by estimating the intensity value ratios of the reference β-actin and the target gene.
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7

Neuroinflammatory Markers in LPS-Induced Rat Hippocampus

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Twenty-six days after LPS induction, IL-1β, IL-6, TNF-α, cyclooxygenase-2 (COX-2), and NF-κB concentrations in the hippocampus were assayed according to a previously described procedure (Lee et al. 2014 (link)). Three rats from each group were deeply anesthetized via isoflurane inhalation (1.2%), and were sacrificed one day after behavioral testing. The IL-1β, IL-6, TNF-α, COX-2, and NF-κB concentrations were evaluated with competitive enzyme-linked immunoassays (ELISAs) using anti-IL-1β antibody (Abcam, Cambridge, MA, USA), anti-IL-6 antibody (Abcam), anti-TNF-α antibody (Abcam), anti-COX-2 antibody (Abcam), and anti-NF-κB antibody (Abcam) according to the manufacturer's protocols.
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8

Histological Evaluation of Kidney Injury

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Kidney was fixed in 4% paraformaldehyde solution and paraffin embedded. Tissues were cut into 5 μm sections and stained with Hematoxylin and Eosin (H&E), Masson’s trichrome or anti-TNF-α antibody (Cat. ab6671, Abcam), respectively. Subsequently, the slides were imaged and captured under light microscope (200× amplification; Nikon, Tokyo, Japan). The ImageJ software (NIH) was applied to quantify the level of positive staining area. At least 6 non-overlapping fields in the view were scored and the value determined was related to total tissue area in the field.
Glomerulosclerosis was evaluated using Masson’s trichrome staining images. Glomerular sclerosis was assigned score from 0 to 4 based on sclerotic area. Grade 0 means normal; grade 1, area up to 25%; grade 2, area from 25% to 50%; grade 3, area from 50% to 75%; grade 4, area from 75% to 100%. The Glomerular sclerosis score was determined using formula: (1×A1+2×A2+3×A3+4×A4)/(A0+A1+A2+A3+A4), where Ax is the number of glomeruli in each grade.
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9

Curcumin Modulates STAT3/TNF-α Signaling

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Curcuma (TCM Pharmacy of Longhua Hospital of Shanghai University of Traditional Chinese Medicine), DSS (MP Biomedicals, USA), absolute ethyl alcohol, Tween-20, xylene substitute (Sinopharm Group Chemical Reagent Co. Ltd.), RIPA Lysis buffer, PMSF, BSA, BCA Protein Quantitation Kit (Beyotime), PAGE gel rapid preparation kit, Multicolor Restrained Protein Ladder (Shanghai EpiZyme Biotechnology Co., Ltd.), β-actin, anti-STAT3 antibody, anti-TNF-α antibody (Abcam Company, England), HE dyeing (Shanghai Yixin Biotechnology Co., Ltd.), and neutral gum (Shanghai Yiyang Instrument Co., Ltd.) were used.
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10

Antibody-based Apoptosis and Inflammatory Signaling Analysis

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The following materials were used: anti-Bcl-2 antibody (Abcam, 182,858), anti-Bax antibody (Abcam, 32,503), anti-GAPDH antibody (Abcam, 8245), anti-cleaved caspase-3 antibody (Cell Signaling Technology, 9664), anti-IL-1β antibody (Cell Signaling Technology,12,242), anti-IL-6 antibody (Cell Signaling Technology, 12,912), anti-IL-10 antibody (Abcam, 189,392), anti-TNF-α antibody (Abcam, 183,218), anti-TLR4 antibody (Abcam, 22,048), anti-MyD88 antibody (Abcam, 133,739), anti-NF-κB antibody (Abcam, 16,502), anti-p-NF-κB antibody (Abcam, 76,302), goat anti-rabbit HRP-conjugated antibody (Abcam 6721), and goat anti-mouse HRP-conjugated antibody (Abcam 6789).
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