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3 protocols using p pi3k p85

1

Comprehensive Cell Signaling Reagents Protocol

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Dulbecco's modified Eagle's medium (DMEM) and foetal bovine serum (FBS) were obtained from Gibco. Earle's balanced salt solution (EBSS) and propranolol were purchased from Sigma‐Aldrich. Rapamycin (RAPA), 3‐methyladenine (3‐MA) and chloroquine (CQ) were obtained from MedChemExpress, and ZVAD‐FMK, necrostatin‐1, liproxstatin‐1, SB203580, SP600125, SC79 and 740Y‐P were purchased from SelleckChem. Then, these reagents were dissolved in dimethyl sulfoxide (DMSO) (MP Biomedicals or water and stored at −80°C. Primary antibodies against Akt, p‐Akt, p38 MAPK, p‐p38 MAPK, JNK, p‐JNK, Erk1/2 and p‐Erk1/2 were purchased from Cell Signalling Technology. Primary antibodies against alpha‐smooth muscle actin (α‐SMA), fibronectin (FN), LC3B, P62, p‐PI3K p85, PI3K p85, ATG9b, ATG9a, mTOR, p‐mTOR, ATG12, ATG5 and anti‐ubiquitin were procured from Abcam. Primary antibodies against beta‐actin, alpha‐tubulin, GAPDH and HRP‐conjugated secondary antibodies were obtained from Proteintech. DyLight 549‐conjugated and DyLight 488‐conjugated secondary antibodies were provided by Abbkine.
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2

Protein Extraction and Western Blotting

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BMDCs were harvested at 24 h after stimulation with LPS and frozen at −80°C. Total protein was extracted using a lysis buffer (Beyotime Institute of Biotechnology, Haimen, China). Protein concentrations were determined by BCA Protein Assay Kit (Beyotime Biotechnology, Shanghai, China). Protein (40 μg/well) was separated via 10% sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and transferred to polyvinylidene fluoride (PVDF) membranes (Millipore Corp., Billerica, MA, USA). Membranes were blocked with 5% non-fat milk in Tris-buffered saline containing Tween 20 (TBST) for 2 h at room temperature, then incubated with primary antibodies (p-PI3K p85, p-Akt T308, p-mTOR, Abcam, Cambridge, UK) diluted in a blocking solution (1:1,000) overnight at 4°C, and finally treated with diluted horseradish peroxidase (HRP)-conjugated secondary antibody (1:50,000, BOSTER Biological Technology Co., Wuhan, Chine) at 37°C for 2 h. The immunoreactive bands were analyzed using the BandScan 5.0 (Glyko, Novato, CA, USA) gel imaging software.
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3

Western Blot Analysis of Apoptosis Markers

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Total protein was extracted from PC12 cells using pre-cold RIPA buffer (Beyotime Institute of Biotechnology) including protease inhibitor. Total protein was quantified using a bicinchoninic acid kit (Sigma-Aldrich; Merck KGaA). Proteins (40 µg) were then separated via 10% SDS-PAGE, proteins were transferred onto PVDF membranes. The membranes were then blocked with 5% skimmed milk at room temperature for 1 h. The membranes were incubated overnight at 4˚C with anti-PDCD4 (1:1,000; cat. no. ab80590; Abcam), PI3K (1:1,000; cat. no. ab32089; Abcam), p-PI3K p85 (1:1,000; cat. no. ab278545; Abcam), AKT (1:1,000; cat. no. ab8805; Abcam), p-AKT (1:1,000; cat. no. ab81283; Abcam), Bax (1:1,000; cat. no. ab32503; Abcam), caspase-3 (1:1,000; cat. no. ab13847; Abcam) and GAPDH (1:1,000; cat. no. ab9485; Abcam) primary antibodies in the absence of light. Then cells were incubated with HRP-labeled anti-rabbit IgG secondary antibody (1:4,000; cat. no. ab6721; Abcam) or anti-mouse IgG secondary antibody (1:5,000, cat. no. ab6789, Abcam) for 2 h at room temperature. The bands were imaged with an Pierce™ ECL Western Blotting Substrate kit (cat. no. 32109; Thermo Fisher Scientific, Inc.) and band density was quantified using Quantity One v.6.2 software (Bio-Rad Laboratories, Inc.).
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