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4 protocols using nb100 2219

1

Evaluating Hypoxia Signaling Pathways

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Lung tissue samples from mice were homogenized in RIPA lysis buffer supplemented with protease inhibitor cocktail (P8340, Sigma-Aldrich). Western blot analysis was performed using anti-PHD2 (NB100-2219 Novus Biologicals and #4835S Cell Signaling), HIF1α (NB100-479 Novus Biologicals) and HIF2α (NB100-122 Novus Biologicals) antibodies. Anti-β-actin (A2066 Sigma-Aldrich) and anti-β-tubulin antibodies (Sigma T4026) were used as a loading control. Phospho-MYPT1 (Thr696, 5163T), MYPT1 (2634T), phospho-myosin light chain 2 (Thr18/Ser19, 3674T), myosin light chain 2 (D18E2, 8505), phospho-Cofilin (Ser3, 77G2) and Cofilin (D3F9, XP® 5175T) antibodies were all from Cell Signaling Technology.
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2

Immunoblotting and Immunoprecipitation of HIF-1α Pathway

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Western blotting and immunoprecipitation were performed using previous methods.60 (link) HIF-1α antibody (1:1 000, 10006421; Cayman), VHL antibody (1:1 000, sc-5575; Santa Cruz), PHD1 antibody (1:1 000, NB100-310; Novus), PHD2 antibody (1:1 000, NB100-2219; Novus), PHD3 antibody (1:1 000, NB100-303; Novus), HSP70 antibody (1:500, ADI-SPA-812; Enzolife), HSP90 antibody (1:500, sc-13119; Santa Cruz) and β-actin antibody (1:2 000, A2066; Sigma) were used for immunoblotting. Protein bands were quantified using ImageJ. For immunoprecipitation, nuclear extracts from cultured B cells were incubated with Dynabeads protein G and 5 μg anti-HIF-1α antibody (H1a67) overnight at 4 °C. Anti-HIF-1α, (1:1 000, 10006421; Cayman) anti-HSP70 (1:500, ADI-SPA-812; Enzolife) and anti-ubiquitin (1:500, sc-166553; Santa Cruz) antibodies were used for immunoblotting. Western blot source data are included in Fig. S9.
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3

Western Blot Analysis of HIF1α and PHDs

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Cells were lysed with 300 µL 1X Lysis buffer (Cell Signaling Technologies, Inc., Danvers, MA, USA) with 1 μg·mL−1 4-(2-aminoethyl) benzenesulfonyl fluoride hydrochloride (AEBSF) protease inhibitor (Sigma-Aldrich, Inc.). Total cell lysate protein concentrations were determined with the Better Bradford Kit (Thermo-Fisher Scientific) according to the manufacturer’s instructions. Western blot analysis was performed with 50 µg of MPC2 or 40 µg of U2OS cellular lysates. The blots were incubated with primary antibody to hypoxia-inducible factor 1-alpha (HIF1α) (NB100–449; Novus Biologicals, Littleton, CO, USA) Phd1 (Abcam; ab108980), Phd2 (Novus; NB100-2219), Phd3 (Novus: NB100-303) overnight, then incubated with secondary antibody at 1:2 000 (anti-rabbit–horseradish peroxidase [HRP]; Cell Signaling Technologies). Blots were stripped using SDS-glycine and reprobed with 1:15 000 anti-β-actin-HRP (A3854; Sigma-Aldrich). Detection was performed using the ECL Prime Western Blotting Detection Reagents (Amersham-GE Healthcare, Pittsburgh, PA, USA) and the GE AB1600 digital imager.
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4

Cardiac Protein Detection and Quantification

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For GATA4, pGATA4 and BNP thirty μg and for MEF2C hundred μg of total protein from heart tissue was lysed in EBC + urea buffer (50 mM Tris-HCl pH 7.5, 150 mM NaCl, 0.5% NP-40, 3 M urea) resolved by SDS-PAGE, transferred to PVDF membrane, blotted, and probed with the following primary antibodies: anti-GATA4 pSer105 (1:600 ab5245, Abcam), anti-GATA4 (1:1000 sc-9053, Santa Cruz Biotechnology), anti-BNP (1:500 ab236101, Abcam), anti-vinculin (1:200 V4505, Merck) and anti-MEF2C (1:7500 sc-313×, Santa Cruz Biotechnology) followed by a HRP-conjugated secondary antibody (1:5000; Bio-Rad). For blotting of HIF1α and HIF-P4H-2 hundred ug of total protein from heart tissue lysed using EBC + urea lysis buffer and was resolved by SDS-PAGE, transferred with nitrocellulose membrane, blotted and probed with anti-HIF1α (1:500, NB100-479 Novus Biologicals) and anti-HIF-P4H-2 (1:500, Novus Biologicals NB100-2219)primary antibodies followed by HRP-conjugated secondary antibody. The Pierce ECL system (Ther-moScientific) was used for detection. Western blot images were quantified with fiji (ImageJ) software. For original blots see (Supplementary Fig. S1-S8).
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