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Supersignal west femto chemiluminescence kit

Manufactured by Thermo Fisher Scientific
Sourced in United States

The SuperSignal West Femto chemiluminescence kit is a laboratory product designed for the detection of low-abundance proteins in Western blot analyses. It provides a sensitive and efficient method for visualizing and quantifying target proteins.

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25 protocols using supersignal west femto chemiluminescence kit

1

Western Blot Protein Analysis Protocol

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The cells were lysed using 1× cell lysis buffer (Cell Signaling Technology, Inc.), including 1 mM phenylmethylsulfonyl fluoride, and transparent protein lysates were obtained following centrifugation at 29,994 × g. Bradford assay reagent (Fisher Scientific International Inc.) was used for protein quantitation, and 40-μg protein samples were separated using 5% stacking and 10% resolving gels at 60 V for 1 or 2 h. The separated proteins were immunoblotted to a polyvinylidene difluoride membrane using iBlot® dry blotting system (Invitrogen Life Technologies) and blocked for 1 h with 5 % skimmed milk in Tris-buffered saline and 1% Tween 20 (Sigma-Aldrich). Protein bands were visualized with the SuperSignal West Femto Chemiluminescence kit (Fisher Scientific International Inc.) and analyzed using Kodak Gel Logic 1500 imaging system software (Eastman Kodak Co., Rochester, NY, USA). For all experiments, a minimum of three independent experiments were performed and representative results were selected for analysis.
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2

Immunoblotting of HLMVEC Proteins

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Lysates obtained from HLMVEC or lung tissues were subjected to SDS-PAGE in 4–20% Tris-glycine gels (Cat # 4561094) (Bio-Rad, Hercules, CA) followed by electrotransfer to PVDF membranes (Cat # 1704156) (Bio-Rad). Specific protein bands were detected using respective primary and secondary antibodies and visualized using Super Signal West Femto Chemiluminescence kit (Cat # PI34095) (Fisher Scientific, Hampton, NH) using LI-COR Odyssey image station (Lincoln, NE). Specific protein images obtained were quantified using LI-COR Image Station software. Protein expressions were normalized by re-probing membranes with an anti-β-actin antibody (Sigma-Aldrich).
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3

Bone Marrow Protein Extraction and Western Blot

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Bone marrow was flushed out of the bone and then dissociated in 66% Trichoracetic acid (TCA) in water. Extracts were incubated on ice for at least 15 min and centrifuged at 16,100 × g at 4°C for 10 min. Precipitates were washed in acetone twice and the dried pellets were solubilized in 9M urea, 2% TritonX-100, and 1% DTT. Samples were separated on 4–12% Bis-Tris polyacrylamide gels (Invitrogen) and transferred to PVDF membrane (Millipore). The blots were incubated with primary antibodies overnight at 4°C and then with secondary antibodies. Blots were developed with the SuperSignal West Femtochemiluminescence kit (Thermo Scientific). Primary antibodies used: rabbit-anti-SCF (Abcam, catalogue number ab64677, 1:1000) and mouse-anti-Actin (Santa Cruz, clone AC-15, 1:20,000).
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4

Western Blot for Hematopoietic Stem Cells

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WB was performed as described previously38 (link). Approximately 20,000 SLAM HSCs were sorted into 250 μl PBS containing 20% trichoracetic acid (TCA). The concentration of TCA was adjusted to 10% after sorting. Extracts were incubated on ice for 30 min and centrifuged at 13,000 rpm for 10 min at 4°C. Precipitates were washed in pure acetone (Fisher scientific, A18-4) twice and the dried pellets were solubilized in 9 M urea, 2% Triton X-100, and 1% DTT together with 1X LDS buffer (Invitorgen, NP0007). Samples were separated on NuPAGE 4–12% Bis-Tris protein gels (Invitrogen, NP0336BOX) and transferred to PVDF membrane (Millipore). The blots were incubated with primary antibodies overnight at 4°C and then with secondary antibodies. NativePAGE™ 4-16% Bis-Tris protein gel was used to detect MPL aggregates in HSCs as manufacturer’s instructions39 (link) (Invitrogen, BN1002BOX). Blots were developed with the SuperSignal West Femto chemiluminescence kit (Thermo Scientific, 34096). Antibodies and reagents used are in Supplementary Table 1 and 2.
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5

Splenic Endothelial Cell Protein Extraction and Analysis

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Approximately 30,000 CD45Ter119VE-cadherin+ splenic endothelial cells were flow cytometrically sorted into 50 μl of 66% Trichoracetic acid (TCA) in water. Extracts were incubated on ice for at least 15 min and centrifuged at 16,100 × g at 4°C for 10 min. Precipitates were washed in acetone twice and the dried pellets were solubilized in 9M urea, 2% TritonX-100, and 1% DTT. Samples were separated on 4-12% Bis-Tris polyacrylamide gels (Invitrogen) and transferred to PVDF membrane (Millipore). The blots were incubated with primary antibodies overnight at 4°C and then with secondary antibodies. Blots were developed with the SuperSignal West Femtochemiluminescence kit (Thermo Scientific). Primary antibodies used: rabbit-anti-SCF (Abcam, 1:1000) and mouse-anti-Actin (Santa Cruz, clone AC-15, 1:20,000).
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6

Calu-3 Cell Protein Expression Analysis

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Calu-3 cells were treated with PS5-DoxL (3 μM), 5-Dox (3 μM), lapatinib (positive control at 1μM), and, without treatment, as a negative control. Cell lysates were collected after 36 hours prepared with cell lysis buffer. Bradford assay was carried out to determine the protein concentration in each of the sample lysates. Sample loading and antibody treatments were done according to the reported method [56 (link)]. Incubation for imaging was carried out with peroxide substrate and enhancer solutions from a Super Signal West Femto chemiluminescence kit (Thermo Scientific, Rockford, IL). ChemiDoc Touch Imaging System from Bio-Rad (Hercules, CA) was employed to expose the membrane and obtain images. Glyceraldehyde 3-phosphate dehydrogenase (GAPDH) was used as a control.
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7

TCA Precipitation and Western Blot

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Western blot was performed as described previously (Xu et al., 2020 (link)). Approximately 5 × 105 DN3 cells were sorted directly into 250 μl PBS containing 20% trichoracetic acid (TCA). The concentration of TCA was adjusted to 10% after sorting and cells were incubated on ice for 30 min before centrifugation at 13,000 rpm for 10 min at 4°C. Precipitates were washed twice with pure acetone (Fisher scientific, A18-4) and solubilized in 9 M urea, 2% Triton X-100, and 1% dithiothreitol (DTT) in 1 x LDS sample buffer (Invitorgen, NP0007). Samples were separated on NuPAGE 4–12% Bis-Tris protein gels (Invitrogen, NP0336BOX) and transferred to PVDF membrane (Millipore). The blots were incubated with primary antibodies overnight at 4°C and then with secondary antibodies. Blots were developed with the SuperSignal West Femto chemiluminescence kit (Thermo Scientific, 34096). Antibodies and reagents used are in Appendix 1. The original western blot images are in source data files.
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8

Bone Marrow Protein Extraction and Western Blot

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Bone marrow was flushed out of the bone and then dissociated in 66% Trichoracetic acid (TCA) in water. Extracts were incubated on ice for at least 15 min and centrifuged at 16,100 × g at 4°C for 10 min. Precipitates were washed in acetone twice and the dried pellets were solubilized in 9M urea, 2% TritonX-100, and 1% DTT. Samples were separated on 4–12% Bis-Tris polyacrylamide gels (Invitrogen) and transferred to PVDF membrane (Millipore). The blots were incubated with primary antibodies overnight at 4°C and then with secondary antibodies. Blots were developed with the SuperSignal West Femtochemiluminescence kit (Thermo Scientific). Primary antibodies used: rabbit-anti-SCF (Abcam, catalogue number ab64677, 1:1000) and mouse-anti-Actin (Santa Cruz, clone AC-15, 1:20,000).
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9

Splenic Endothelial Cell Protein Extraction and Analysis

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Approximately 30,000 CD45Ter119VE-cadherin+ splenic endothelial cells were flow cytometrically sorted into 50 μl of 66% Trichoracetic acid (TCA) in water. Extracts were incubated on ice for at least 15 min and centrifuged at 16,100 × g at 4°C for 10 min. Precipitates were washed in acetone twice and the dried pellets were solubilized in 9M urea, 2% TritonX-100, and 1% DTT. Samples were separated on 4-12% Bis-Tris polyacrylamide gels (Invitrogen) and transferred to PVDF membrane (Millipore). The blots were incubated with primary antibodies overnight at 4°C and then with secondary antibodies. Blots were developed with the SuperSignal West Femtochemiluminescence kit (Thermo Scientific). Primary antibodies used: rabbit-anti-SCF (Abcam, 1:1000) and mouse-anti-Actin (Santa Cruz, clone AC-15, 1:20,000).
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10

Western Blot Analysis of NF-κB and ERK

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Cell lysates from treated PSCs were run on a 4 ~ 12% Bis-Tris gel then transferred to a 0.2 mm nitrocellulose membrane. After blocking in 5% milk, membranes were incubated overnight at 4°C with primary antibodies for phospho-NF-κB p65 (93H1), NF-κB p65 (L8F6), phosphor-ERKd13.14.4E), ERK (137F5) (All from Cell Signaling Technology) and B-actin (Sigma, A5316). Membranes were washed then incubated with peroxidase-conjugated goat-anti-rabbit-HRP and goat-anti-mouse-HRP secondary antibodies (Fisher Thermo, 31430) for 1 h at room temperature then developed with SuperSignal® West Femto chemiluminescence kit (Thermo Scientific, 34095) and exposed on film.
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