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8 protocols using anti nf kb p65

1

Histological Evaluation of Renal Injury

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The renal tissue samples from all animals were fixed with 4% paraformaldehyde for 3 days and embedded in paraffin. The 5 μm sections were stained with haematoxylin and eosin (H&E), specific antibodies and Masson's trichrome for histological evaluation and scoring. The protein signal was detected using the appropriate primary antibody amplifier, horseradish peroxidase (HRP)‐conjugated polymer and DAB chromogen/substrate. The slides were immunostained with anti‐NFkB p65 (50‐fold of dilution; Abcam), anti‐ALPK1 (100‐fold of dilution; GeneTex Inc), anti‐CCL2 (50‐fold of dilution; Abcam) and anti‐CCL5 (50‐fold of dilution; Abcam). The tubular injury was scored based on the degree of tubular necrosis, loss of brush border, cast formation and tubular dilatation, as in previous reports.19, 20 The scoring standard was as follows: 0‐normal kidney; 1‐minimal injury (<5% involvement); 2‐mild injury (5%‐25% involvement); 3‐moderate injury (25%‐75% involvement); and 4‐severe injury (>75% involvement).
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2

Pep-B Inhibits LPS-Induced NF-κB Activation

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HDPSCs were seeded onto 12 well glass coverslips (2 × 104 cells per well) for 24 h, and then hDPSCs were treated with LPS with or without either 2.5 or 5 μg/ml Pep-B for 2 h. The cells were fixed in 4% paraformaldehyde for 15 min, permeabilized with 0.05% Triton X-100 for 10 min, and blocked using 5% BSA in 37°C for 1 h. Next, cells were incubated with anti-NF-kBp65 (1 : 300; Abcam) in 4°C overnight. After washing with PBS for three times, the cells were incubated with secondary antibodies goat anti-rabbit Alexa Fluor 488 (1 : 200, Abcam) at room temperature for 1 hour, and then DAPI (5 μg/ml, Solarbio) was used to stain nuclei. Images were obtained using a confocal laser scanning microscopy (Leica, Wetzlar, Germany).
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3

Protein Extraction and Western Blot Analysis

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Protein was extracted using RIPA buffer (Sigma) with a protease inhibitor cocktail (cOmplete Mini EDTA-free, Roche) and a phosphatase inhibitor cocktail (PhosSTOP EASYpack, Roche) [21 (link)]. We used the following primary antibodies: anti–NFKB-p65 (1:2000; Abcam #ab16502), anti–NFKB-p65 (phospho-Ser536) [93H1] (1:1000; Cell Signaling Technology #3033), anti-IKKa [Y463] (1:5000; Abcam #ab32041), anti-IKKa (phospho-Ser32/36) [5A5] (1:1000; Cell Signaling Technology #9246), anti-p44/4S2 MAPK [137F5] (1:2000; Cell Signaling Technology #4695), anti-p44/42 MAPK (phospho-Thr202/Tyr204) [E10] (1:2000; Cell Signaling Technology #9106), anti-LC3B (1 mg/mL; Abcam #ab48394), EGFR (#4267, CST), pEGFR (#2234, CST) and β-actin (#A5316, Sigma). β-actin protein expression was used as a loading control. Horseradish peroxidase-conjugated secondary antibodies were used for chemiluminescence-based detection of protein expression in the ChemiDoc detection system (BioRad).
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4

Immunofluorescence Staining of Neural Markers

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The sections used for immunofluorescence staining were incubated with primary monoclonal mouse anti-MBP antibody (1:500, Abcam, Cambridge, MA), anti-GAP43 and anti-CD68/ED1 (1:100; Santa Cruz, Dallas, TX) antibodies and polyclonal rabbit anti-activated caspase-3 (1:500; Cayman Chemical, Ann Arbor, MI), anti-NF200 (1:500, Abcam, Cambridge, MA), anti-GFAP (1:200, Thermo Fisher Scientific Waltham, MA), anti-Olig1 (1:500; Abcam, Cambridge, MA), anti-CNTF (1:500, Abcam, Cambridge, MA), anti-NF-kB p65 (1:500, Abcam, Cambridge, MA) antibodies and anti-BDNF(1:500, Abcam, Cambridge, MA) antibodies overnight at 4 °C. The sections were then washed with phosphate-buffered saline (PBS) and incubated with 1:200 TRITC (rhodamine)-conjugated secondary antibodies for 1 h at 37 °C (Invitrogen, Carlsbad, CA). The sections were finally coverslipped with Antifade Gel/Mount Aqueous Mounting Media (Southern Biotech, Birmingham, AL).
Five sections from the brain cortex and anterior horns of the spinal cord for each animal were randomly selected and images were photographed under 200x magnification in three vision fields per section. GFAP, MBP, CD68-immunoreactive areas were analyzed with NIH image software, and the numbers of GAP43, caspase-3, NF-200, Olig1, CNTF, NF-kB p65, BDNF-labeled cells were counted.
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5

Bladder Tissue Protein Expression Analysis

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About 100 mg of bladder tissue were lysed by RIPA lysate with a final concentration of 1 mM phenylmethylsulfonyl fluoride (PMSF). Protein quantification was performed using the Bio-Rad DC Protein Assay Kit (Guangzhou Yuwei Biotechnology Instrument Co., Ltd., Guangzhou, China). Each sample was added SDS loading buffer. And boiling in water for 10 min, the sample was load on a 10% SDS–polyacrylamide gel and run at 120 V, 30 min, and 100 V for 90 min. The protein was transferred from the gel to a PVDF membrane. The membrane was immersed in 1 × TBST containing 5% skimmed milk powder and gently shaken at room temperature for 2 h to block non-specific binding sites. PVDF membrane was wash 1 × TBST 3 times, 5 min/time. Add primary antibodies (anti-CB1, rabbit, 1: 250; Anti-NF-kB p65, rabbit, 1: 1000; anti-p-JNK, rabbit, 1: 1000; Abcam), incubated at 4 °C overnight, washed 3 times with 1 × TBST, 5 min/time, and then added with secondary antibody IgG (Affinity Biosciences Bio, S0001, goat anti-rabbit, 1: 20000) respectively and incubated 3 times with 1 × TBST at room temperature for 1 h. Development was performed with ECL. The gray value of Western blotting experimental protein expression was determined by Image J software, and the experiment was repeated three times.
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6

Western Blot Analysis of Apoptosis Markers

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As described by Taylor et al. [12 (link)], the total protein was first collected from cells with a RIPA lysis buffer (Solarbio) and then quantified with a BCA protein assay kit (Solarbio). After electrophoresed on SDS-PAGE, the samples were then transferred onto PVDF membranes (Millipore, MA, USA) and blocked with 5% nonfat milk for 1 h at room temperature. The primary antibody of Anti-Bax (Abcam, Cambridge, UK), Anti-Cleaved Caspase-3 (Abcam, Cambridge, UK), Anti-Bcl-2 (Abcam, Cambridge, UK), Anti-NF-kB p65 (Abcam, Cambridge, UK) and the secondary antibodies of HRP conjugated Goat-anti-Rabbit IgG (1:10,000, Invitrogen) were used for the incubation. After reacting with ECL reagent (Millipore, MA, USA), the samples were then examined in a Bio-Rad imaging system (Hercules, CA, USA). Image J software was used to measure the gray value of each sample.
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7

Protein Analysis of Mesenteric Lymph Nodes

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Total proteins were extracted from the mesenteric lymph nodes with RIPA buffer supplemented with a cocktail of protease inhibitors, including PMSF. An equal amount of 20 μg of protein was fully electrophoresed on 10% SDS polyacrylamide gels and transferred to polyvinylidene fluoride membranes. After blocking with 5% skim milk at room temperature for 1 h, the membranes were incubated with primary antibodies overnight at 4 °C. The primary antibodies against GAPDH were obtained from Abcam and were diluted at a 1:10000 ratio, and the other antibodies were as follows: anti-TLR4 (1:1000, NOVUS), anti-S100A8/A9 (1:1000, NOVUS), anti-NF-kB p65 (0.5 μg/ml, Abcam) and anti-TNF-α (1:1000, Abcam). Subsequently, the membranes were incubated with goat anti-rabbit or anti-mouse secondary antibodies (diluted at a 1:5000 ratio), and then an ECL Detection System (Millipore) was used to detect the protein.
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8

Regulation of CCR-2 and CCL-2 by NF-kB and p38 MAPK

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To elucidate the roles of NF-kB and p38 MAPK on CCR-2 expression, as well as CCL-2 release, pyrrolidine dithiocarbamate [PDTC; Cat No. SC-203224 (Santa Cruz Biotechnology)] an inhibitor of NF-kB activation, and pyridinyl imidazole (Cat. No. SB203580; Santa Cruz Biotechnology) an inhibitor of p38 MAPK activation, were separately added to the cultured FBMCs 30 min prior to S. aureus infection in the presence of anti-CCR-2 Ab. 67, 68 After 30 min, 60 min and 90 min of phagocytosis, followed by centrifugation, the cell supernatants were used for CCL-2 ELISA assaym 69 and cell lysates were prepared for CCR-2 and NF-kB immunoblot analysis using primary Abs using anti-CCR-2 and anti-NF-kB (p65) (Abcam) as mentioned previously. 70
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