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54 protocols using image lab software version 3

1

Whole Cell Lysate Fractionation and Western Blot Analysis

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Whole cell lysate was prepared by solubilizing cell pellet in RIPA buffer (Sigma; R-0278) over ice for 40 minutes as described previously [32 (link)]. The lysate was cleared by centrifugation at 14000 g for 15 min at 4°C and the supernatant was collected as whole cell lysate. Cytosolic and nuclear fractions were prepared as described previously with minor modifications [33 (link)]. Protein estimation was done by Bradford’s method.
Western blotting was performed using equal amounts of protein, including pre-stained molecular weight markers (Precision Plus Protein Standards Kaleidoscope, Bio Rad). The proteins were electrotransferred to polyvinylidene difluoride (PVDF) membranes (Immobilon P 0.45 μm, Millipore). After blocking for 2 h at room temperature in 5% fat-free milk powder or 3% BSA in TBST (Tris-buffered saline containing 0.05% Tween 20, pH 8.0), membranes were incubated overnight with specific antibodies. After 30 minutes washing with TBST, membranes were probed with different HRP-conjugated secondary antibodies. Detection of specific proteins was carried out by Immobilon Western (Chemiluminescent HRP substrate, Millipore) mediated chemiluminescence by ChemiDoc XRS+ (Bio Rad). Densitometry of specific bands was done using Image Lab Software version 3 (Bio Rad).
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2

Regulation of NF-kB Signaling Pathway

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RAW 264.7 cells
(2 × 105cells/well) were pretreated with compound
III (5 and 10 μM) for 1 h and stimulated with LPS (1 μg/mL)
for 24 h. Cells were then harvested; then, the cell pellet was dissolved
in radio-immunoassay precipitation buffer (Sigma; R-0278) over ice
for 40 min. The lysate was then centrifuged at 14,000g for 15 min at 4 °C, and the supernatant was collected. Protein
estimation was carried out by Bradford’s method with the bovine
serum albumin (BSA) standard. Western blotting was performed according
to the reported protocol.76 (link) Specific proteins
were detected by Immobilon Western (Chemiluminescent HRP substrate,
Millipore)-mediated chemiluminescence by ChemiDoc XRS+ (Bio Rad).
Densitometric analysis of specific bands was carried out using Image
Lab Software version 3 (Bio Rad). The effect on phosphorylation of
IKK-α/β, IKBα, and NF-kB p65 was studied in a dose-dependent
manner with respect to dexamethasone (0.5 μM).
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3

Cytochrome c Release Induced by Palmitic Acid

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The cytosolic fraction of cyt c was extracted from the cell with RIPA lysis buffer containing 1% PMSF and detected by western blotting. Briefly, L-02 cells were treated without or with POA (20 or 40 µM for 24 h), 5×106 cells were trypsinized and harvested, and the treated cells were lysed in precooled lysis buffer on ice for 30 min. The homogenate was centrifuged at 8,000 × g for 8 min at 4°C, and the supernatant was transferred to an ice-cold 1.5 ml tube and stored at −20°C until further use. The protein concentration in the supernatant was determined by the BCA protein assay kit. Equal amounts of protein (60 µg/lane) were separated by 12% SDS-PAGE and were electrotransferred to a polyvinylidene difluoride membrane. The membrane was then incubated in 5% non-fat milk in TBS with Tween-20 (TBST) for 2 h followed by overnight incubation with the cytochrome c antibody at 4°C. The incubated membrane was washed with TBST before incubation for 1 h with a HRP-conjugated goat anti-rabbit IgG secondary antibody at 25°C. Membranes were washed with TBST, and proteins were detected by an ECL kit (Beyotime Institute of Biotechnology, Jiangsu, China) and analyzed by Gel. Doc2000 Gel imager (Bio-Rad Laboratories, Inc.) with Image Lab Software version 3.0 (Bio-Rad Laboratories, Inc.).
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4

Quantitative Protein Expression Analysis

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According to the method of Kang et al. [13 (link)], homogenates of medaka gills or embryos were prepared. Aliquots containing 20 μg of homogenates were heated at 65°C for 25 min and fractionated by electrophoresis on SDS-containing 7.5% polyacrylamide gels. Transferred PVDF blots were incubated with VILL polyclonal antibody (1:200,000 dilution) or β-actin monoclonal antibody (1:10,000 dilution; 8226, Abcam, Cambridge, UK) for 2 hrs, followed by a 1-hr reaction with horseradish peroxidase-conjugated goat anti-mouse or anti-rabbit IgG (Pierce, Rockford, IL, USA). Blots were developed using the SuperSignal West Pico Detection Kit (#34082, Pierce) and analyzed with Image Lab software version 3.0 (Bio-Rad) after densitometric scanning of membranes using a ChemiDoc XRS+ (Bio-Rad). Results were converted to numerical values to compare relative intensities of immunoreactive bands.
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5

Western Blot Analysis of Apoptosis Markers

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Total proteins from H9c2 cells were extracted, separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and detected using an ECL Western Blotting Detection Kit (GE Healthcare, UK). Antibodies against β-actin, Bcl-2, Bax, and cytochrome C were purchased from Santa Cruz Biotechnology (Santa Cruz, CA, USA). Digital images were analyzed for densitometry using Image Lab™ Software Version 3.0 (Bio-Rad, Hercules, CA, USA).
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6

EMSA Assay for PLSCR1-IP3R1 Binding

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EMSA assay was performed according to the modified method as described previously.40 A double-stranded mutated oligonucleotide, which positive-sense strand was (5′-CTTAAAGTGCAGGAGCTCTGTGGATGTGCTGCT-3′), was used to evaluate the specificity of PLSCR1-binding site in the IP3R1 gene promoter region (5′-CTTAAAGTGCAGTAACCATGTGGATGTGCTGCT-3′), together with the complementary oligonucleotide (5′-AGCAGCACATCCACATGGTTACTGCACTTTAAG-3′) double-stranded probes. The anti-PLSCR1 antibody was used for supershift experiments. The results were photographed using a Bio-Rad phosphorimager and analyzed with Image Lab Software, Version 3.0 (Bio-Rad, Hercules, CA, USA).
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7

Cytoskeletal and Apoptotic Protein Expression

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The expressions of cytoskeletal proteins (ARP3, ARPC3), migration protein (MMP-9), and apoptotic protein (Caspase3) were detected by WB. Cal-27 cells were cultured with 0.60 mM ICD for 24 h, 48 h, and 72 h, respectively. All proteins were extracted with a RIPA buffer (Beyotime, Shanghai, China) containing a protease inhibitor (Beyotime, Shanghai, China) and a phosphatase inhibitor (Roche Diagnostics GmbH, Mannheim, Germany). The protein concentration of each group was measured using the BCA protein assay kit (BCA; Beyotime, Shanghai, China). After protein denaturation, equal amounts of proteins were separated by SDS-PAGE and transferred to a PVDF membrane (Millipore, Billerica, MA, USA). The membranes were then enclosed in 5% skim milk powder at room temperature for 2 h and incubated with primary antibodies (ARPC3, ab37916, 1:1000; ARP3, ab181164, 1:1000; MMP-9, ab283575, 1:1000. Abcam; Caspase3, PA5-122288, 1:1000) at 4 °C overnight. The membranes were washed 3 times with 0.1% Tween-20 (TBST) and incubated with the appropriate HRP-chelated secondary antibodies (1:5000, Abcam, Cambridge, UK) at room temperature for 1 h. Bio-Rad Image Lab software (Version 3.0) was used to conduct an exposure analysis after ECL was added.
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8

Protein Expression Analysis Protocol

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The three groups of cells were lysed with RIPA lysis buffer on ice at 48 h after transfection. The supernatant was retained after high-speed centrifugation (12,000 × g at 4°C) and the protein concentrations were measured using a BCA kit (Beyotime Institute of Biotechnology). Equal amounts of protein (15 µg)were separated by SDS-PAGE on 10% gels (Beijing Solarbio Science & Technology Co., Ltd.), and transferred to PVDF membranes. The PVDF membranes were blocked with 5% skim milk at room temperature for 2 h. They were then incubated with primary antibodies against interleukin-1 receptor-associated kinase 1 (IRAK1; dilution, 1:1,000; cat. no. ab180747; Abcam), TNF receptor associated factor 6 (TRAF6; dilution, 1:1,000; cat. no. ab33915; Abcam) and GAPDH (dilution, 1:10,000; cat. no. ab181602; Abcam) at 4°C overnight. The membranes were then incubated with horseradish peroxidase-conjugated goat anti-rabbit secondary antibody (dilution, 1:5,000; cat. no. BB-2202; BestBio Company; http://bestbio.bioon.com.cn/) at room temperature for 2 h. Proteins were visualized by chemiluminescence using an ECL kit (Beyotime Institute of Biotechnology), according to the manufacturer's protocols. The expression of proteins was quantified using densitometry analysis (ChemiDoc™ XRS+ gel imaging system) and analysed using image lab software (version 3.0; both Bio-Rad Laboratories, Inc.).
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9

Quantification of VEGF Protein Levels

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The total proteins in the CSF and serum samples were extracted with protein lysis solution (Tiangen Biotech). Protein concentration was measured with a bicinchoninic acid kit (Tiangen Biotech). SDS-PAGE sample buffer (Tiangen Biotech) was added to the protein samples, and the samples were boiled for 5 min. A total of 20 μg protein was used for SDS-PAGE with 10% acrylamide gels, and the protein was then transferred onto a membrane at a constant voltage of 100 V for 2 h under ice-cold conditions. The membrane was blocked with 5% skimmed milk for 1 h at room temperature. Rabbit anti-human monoclonal anti-VEGF primary antibody (1:1,000; cat. no. ab52917, Abcam, Cambridge, MA, USA) and the internal reference rabbit anti-human monoclonal anti-β-actin primary antibody (1:5,000; cat. no. ab115777, Abcam) were added for incubation with the membrane at 4°C overnight. A goat anti-rabbit polyclonal immunoglobulin G secondary antibody (1:3,000; cat. no. ab97047, Abcam) was subsequently added for incubation at room temperature for 1 h. The membrane was placed in an enhanced chemiluminescence solution (Tiangen Biotech) and then exposed to the Gel Doc™ EZ Imager (Bio-Rad Laboratories, Inc.). Image Lab software version 3.0 (Bio-Rad Laboratories, Inc.) was used for protein band analysis. The relative content of the target protein was determined as the ratio to the internal reference β-actin.
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10

Comprehensive Western Blot Analysis Protocol

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Western blot was performed as previously described (11 (link)). The primary antibodies used included anti-CD206 (ab64693, Abcam), anti-Arg-1 (ab233548, Abcam), anti-Ym1 (ab192029, Abcam), anti-SIRPα (ab191419, Abcam), anti-p-STAT3 S727 (ab32143, Abcam), anti-p-STAT3 Y705 (#9664, CST), anti-STAT3 (9662, CST), anti-α-SMA (ab7817, Abcam), anti-cleaved Caspase 3 (CST; 9662), anti-Caspase 3 (CST; #3498), anti-Bcl2 (CST; #3498), anti-E-cadherin (GTX100443, GTX), and anti-GAPDH (ab181602, Abcam). The secondary antibodies included Peroxidase AffiniPure Goat Anti-Rabbit IgG (H+L) and Peroxidase AffiniPure Goat Anti-Mouse IgG (H+L) (111035003, 115035003, Jackson, West Grove, PA, USA). Protein levels were quantified using the Image Lab software, version 3.0 (Bio-Rad, Hercules, CA, USA).
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