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31 protocols using anti rabbit igg peroxidase

1

Detailed Protein Analysis Methodology

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Chemicals and drugs of the purest available grade including NAC were provided by Sigma Chemical Co. (St. Louis, MO, USA). Primary antibodies anti-P-AKT (reacting with Ser473), anti-AKT, anti-Insulin-receptor (anti-IR), anti-fructokinase (anti-fructokinase), anti-glutathione-peroxidase (anti-GPx), and anti-glutathione reductase (anti-GR) were obtained from Santa Cruz Biotechnology, Inc. (Santa Cruz, CA, USA; catalog number 6040S, 9272,sc-711, sc-50029, sc-133160, and sc-133245, respectively). Anti-COX-2 from CAYMAN Laboratories (Ann Arbor, MI, USA catalog number 160106), anti-iNOS, and anti-eNOS were obtained from Sigma (St. Louis, MO, USA; catalog number N7782). Anti-P-eNOS (Ser 1177) was provided by Cell Signaling Laboratory (Danvers, MA, USA; catalog number N3893); anti-glucokinase antibody (sheep anti-GST-glucokinase fusion protein antibody) was kindly provided by Dr. Mark Magnusson (Vanderbilt University, TN, USA). This antibody, another from Santa Cruz Biotechnology Inc. (Santa Cruz, CA, USA; glucokinase-N-19: sc:1980), and anti-GAPDH from Millipore (Carlsbad, CA, USA; catalog number 92590) were also provided. Finally, a secondary antibody anti-rabbit IgG Peroxidase (developed in goats) was obtained from Sigma (St. Louis, MO, USA; catalog number A9169).
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2

Antibody Validation for Western Blot and ChIP

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Antibodies used for western blot and ChIP were pSTAT5 (Cell Signaling Technology 9351), STAT5A (Santa Cruz Biotechnology sc-1081), STAT5B (Santa Cruz Biotechnology sc-1656), STAT5A+B (Santa Cruz Biotechnology sc-835), RNA polymerase II (Santa Cruz Biotechnology sc-899 and sc-900), TBP (Santa Cruz Biotechnology sc-273), histone H3 (Abcam ab1791), acetylated histone H3 (Ac-H3; Millipore 06–599), acetylated histone H4 (Ac-H4; Millipore 06–866), α-tubulin (Santa Cruz Biotechnology sc-32293), HDAC1 (Millipore 05–100), HDAC2 (Invitrogen 51–5100), HDAC3 (Cell Signaling Technology 2632), FLAG (M2, SIGMA F-1804), Brd2 (Bethyl A302–583A) and IgG from rabbit serum (SIGMA I-5006; isotype control for ChIP). Secondary antibodies for western blot were anti-Rabbit IgG-Peroxidase (SIGMA A-0545) and anti-Mouse IgG-Peroxidase (SIGMA A-8924).
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3

Western Blot Analysis of C. crescentus

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C. crescentus swarmer cells were isolated using the mini-synchrony protocol, and the inducer was added (as specified in the figure legends). OD600 of incubated cultures were normalized to ~0.2, and the cell pellets resuspended in Cracking buffer (40 μL) were boiled at 80°C for 10 min and stored at –20°C for Western blots. Proteins were separated on SDS-PAGE and transferred into the nitrocellulose membrane using iBlot2 (Invitrogen Dry Blotting System). The membrane was blocked with 1 × TBS (10 mM Tris-Cl, pH 8.0, 150 mM NaCl) with 5% nonfat milk and 0.1% Tween 20 (T) for 1 h. The blot was probed with ~1:10,000 diluted primary antibody (anti-Flag for ParA-M2, F7425 Sigma-Aldrich, and anti-DnaA for DnaA) overnight at 4°C. The membrane was washed three times with 1 × TBST and incubated for 1 h with 1:10,000 diluted secondary antibody (Anti-Rabbit IgG peroxidase, Sigma-Aldrich) at room temperature. Excess secondary antibody was removed by washing the membrane with 1 X TBST three times. The membrane was developed with SuperSignal West Pico PLUS Chemiluminescent Substrate (Thermo Scientific), and imaged with ChemiDoc-MP imaging system (Bio-Rad Laboratories).
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4

Fibrosis Signaling Pathway Protocols

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PDE5-I vardenafil was obtained from Sequoia Research Products Ltd. (vardenafil citrate), Sigma Aldrich, or Selleckchem (vardenafil HCl). Nintedanib was obtained from Cayman Chemical. TGF-β1 was obtained from R&D Systems. The antibodies used in this study were as follows: fibronectin (Sigma Aldrich, F3648, St. Louis, MO, USA), CTGF (Santa Cruz Biotechnology, sc-14939, Dallas, TX, USA), αSMA (Sigma, A2547), p-SMAD3 (Cell Signaling 95205, Danvers, MA, USA), total SMAD3 (Abcam AB 28379), and GAPDH (Millipore MAB374). The secondary antibodies used for fibronectin ELISA included anti-rabbit IgG peroxidase (Sigma Aldrich, A0545) and anti-rabbit IgG-HRP (SantaCruz Biotechnology sc-2004). Additional antibodies for TGF-β1 signaling included the following: anti-mouse serpin E1/PAI-1 antibody (AF3828; R&D systems), anti-CTGF (sc-14939; SCBT), anti-αSMA (A2547; Sigma), anti-fibronectin (F3648, Sigma), anti-GAPDH (AB2302; Millipore, Burlington, MA, USA), anti-phospho-SMAD3 and anti-phospho-SMAD2 antibodies generated in our laboratory, anti-SMAD2 (ab63576; Abcam, Cambridge, UK), anti-SMAD3 (ab28379; Abcam), anti-phospho-AKT (Ser473; 9271, Cell Signaling), anti-phospho-AKT (T308; 4056, Cell Signaling), anti-phospho S6K (Thr389, 9234, Cell Signaling), anti-Akt (9272, Cell Signaling), and anti-S6K (9202, Cell Signaling).
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5

Western Blot Protein Analysis Protocol

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Total proteins were extracted in RIPA buffer containing 1 mM sodium orthovanadate and Complete Protease Inhibitor Cocktail (Roche Applied Science) and quantified using the Pierce™ BCA protein assay kit (Thermo Fisher). Equal amounts of proteins were loaded onto SDS–polyacrylamide gels and transferred to PVDF membrane. The membranes were then blocked with 5% non‐fat milk in TBST 0.1% and immunoblotted overnight at 4°C with the following primary antibodies (1:1,000): TCHP (Santa Cruz Biotechnology, SC‐515025), β‐actin (Sigma, A5441), p62 (GeneTex, GTX100685), LC3B (CST, #2775), p16 (BD Biosciences, 551154), NF‐κB (Millipore, MAB3026), (S536) NF‐κB (CST, #3033), PCM1 (CST, #5213) and GABARAP (CST, #13733), NDP52 (CST, #60732) and V5 (Thermo Fisher, R960‐25). Secondary antibodies (1:5,000): anti‐Mouse IgG–Peroxidase (Sigma, A5906) and anti‐Rabbit IgG–Peroxidase (Sigma, A0545), were incubated for 1 h at RT. Pixel intensity/quantification was performed using ImageJ.
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6

Protein Extraction and Western Blot Analysis

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Total proteins were prepared by resuspending 1 × 106 cells in extraction buffer (50 mM Tris-HCl pH 7.6; 0.15 M NaCl; 5 mM EDTA; 16 Protease Inhibitors; 1% Triton X-100). One 40 s pulse of sonication (UP100H manual sonicator, Hielscher) at 40% amplitude was performed to allow dissociation of protein from chromatin and solubilization. Extracts were analyzed by SDS-PAGE using an 8% gel (37.5:1 Acryl/Bis Acrylamide). The following primary antibodies were used: Beta-Actin (Santa-Cruz sc1616, rabbit 1:4000), H3 total (Abcam ab1791, rabbit 1:6000), Lamin A/C (Santa Cruz sc-6215, goat 1:4000), Lamin B (Santa Cruz sc6216, goat 1:2000), progerin (13A4 mouse, Abcam 66587, mouse 1:1000), Ezh2 (AC22 Cell Signaling 3147S, mouse 1:1000), Bmi1 (D42B3 Cell signaling, rabbit 1:1000), H3K9me3 (Abcam ab8898, rabbit 1:1000), H3K27me3 (Millipore 07-449 rabbit 1:1000). HRP-conjugated secondary antibodies were revealed with the ECL chemiluminescence kit (ThermoFisher Scientific). The following secondary antibodies were used: Anti-Mouse IgG-Peroxidase (Sigma, A9044), Anti-Rabbit IgG-Peroxidase (Sigma, A9169), Anti-Goat IgG-Peroxidase (Sigma, A5420).
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7

Phosphoinositide Binding Assay with PIP-Strips

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PIP-strips supplied by Echelon Biosciences, Inc. (Salt Lake City, Utah, USA) were used to perform phosphoinositide binding according to the supplied protocol. Briefly, GST and GST-fusion proteins were eluted from the glutathione agarose beads with elution buffer (20 mM reduced glutathione, 50 mM Tris/HCl, pH 7.4, 100 mM NaCl, 0.2% Tween-20, and 100 mM DTT).
The membranes were blocked with 0.1% ovalbumin (Sigma # A-5253) in TBS for one hour at room temperature. After discarding the blocking solution membranes were incubated with 1 mg/ml GST-fusion proteins in TBS-T (50 mM Tris/HCl, pH 7.4, 100 mM NaCl, 0.2% Tween-20) at room temperature for one hour. The protein solution was then discarded and the membranes were washed with TBS-T three times 10 minutes each. Bound protein was detected by western blot analysis with GST polyclonal antibodies as primary and anti-rabbit IgG-peroxidase (Sigma # A-6154) as secondary antibody followed by enhanced chemiluminescence.
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8

Chromatin-Enriched Protein Extraction Protocol

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Embryos were washed with PBS and lysed on ice for 10 min in a lysis buffer (25 mM Tris-HCl, pH 7.5, 250 mM NaCl, 5 mM MgCl2, 10% [v/v] glycerol, 0.2% [v/v] NP-40, and 1 mM NaF). Chromatin-enriched fractions were collected by low-speed centrifugation at 1500g for 5 min, washed with the lysis buffer, and further lysed with 1× SDS buffer. Proteins were separated using polyacrylamide gels (5.5% for SMC3 and 12.5% for histone H3) and transferred onto polyvinylidene difluoride membrane (MilliporeSigma). After blocking with 5% skim milk for 1 h at room temperature, membranes were incubated with primary antibodies (SMC3: abcam ab9263, histone H3: abcam ab1791) overnight at 4°C. After several washes, membranes were incubated with secondary antibody (anti-rabbit IgG Peroxidase, Sigma-Aldrich A0545) for 1 h at room temperature. Protein bands were visualized using the ECL Select Western Blotting Detection Reagent (GE Healthcare) and detected by ImageQuant (GE Healthcare).
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9

Metformin Cytotoxicity and Apoptosis Assay

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Metformin (1,1-dimethyl biguanide hydrochloride) was purchased from Sigma (#D150959, Sigma-Aldrich, St. Louis, MO, USA) and dissolved in a serum-free medium to a stock solution of 1 M. Other chemicals and reagents were purchased from Sigma (Sigma-Aldrich, St. Louis, MO, USA) and Merck (Merck KGaA, Darmstadt, Germany).
Antibodies were purchased from Sigma (Sigma-Aldrich, St. Louis, MO, USA) and CST (Cell Signaling Technology, Beverly, MA, USA). The antibodies used for Western blots were anti-rabbit IgG-peroxidase (#A0545, Sigma), rabbit anti-GAPDH antibody (#G9545, Sigma), rabbit anti-β-actin antibody (#A2066, Sigma), anti-PARP antibody (#9542, CST), anti-caspase-3 antibody (#9662, CST) and anti-cleaved caspase-3 antibody (#9664, CST).
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10

Cyclin D1 and DEPTOR Protein Expression Analysis

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For Western Blot analysis, cells were washed with PBS and scraped after addition of denaturing buffer (160 mM Tris-HCl pH 6.8, 4% SDS, 10% b-mercaptoethanol, 24% glycerol and 0.02% bromophenol blue). Protein extracts were subjected to SDS-PAGE, transferred to nitrocellulose membrane and probed with rabbit anti-cyclin D1 (produced in rabbit, Neomarkers, cat#RB-4091-P1, 1:8000) and anti-DEPTOR/DEPDC6 (D9F5) (produced in rabbit, Cell Signaling, cat#11816 S, 1:1000) antibodies. After incubation with secondary antibody anti-rabbit IgG-peroxidase (produced in goat, Sigma, cat#A6154, 1:2500), membranes were analyzed with Novex® ECL HRP Chemiluminescent kit. The signals obtained were quantified with ImageJ software.
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