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2 protocols using anti erα mc20

1

Coimmunoprecipitation and Western Blot Analyses

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Tissue proteins were extracted in IP Lysis Buffer (Thermo Fisher Scientific) mixed with cOmplete Protease Inhibitor Cocktail (Roche), and lysates were incubated overnight at 4°C with 5 μg anti-ERα (MC20; Santa Cruz Biotechnology) or anti-striatin (BD Bioscience) antibody. Next, the lysates were incubated with protein G beads (Amersham Biosciences) for 2 h at 4°C, and the pellets obtained after centrifugation were washed five times and analyzed by immunoblotting. Proteins were resolved by dodecyl sulfate-PAGE, transferred to polyvinylidene fluoride membranes, and probed with the appropriate primary antibodies, including AMPK, GAPDH (Santa Cruz Biotechnology), PP2Ac (Millipore), phospho (p)-AMPK, p-Akt, total Akt (Cell Signaling Technology), and α-tubulin (EMD). Membranes were then incubated with the appropriate secondary antibodies and developed using ECL Prime (Amersham Biosciences). The Proteome Profiler Antibody Array (R&D Systems) was used for phospho-kinase analysis, according to the manufacturer’s instructions.
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2

Enrichment and Analysis of Mammary Stem/Progenitor Cells

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CD45+/TER119+, and CD31+ cells were removed from dissociated cells using the EasySep biotin selection kit (StemCell Technologies, Vancouver, BC, Canada) according to the manufacturer's instructions. Cells were resuspended in HBSS (Invitrogen) with 2% FBS and incubated with anti-CD24-PE (10 μl/test, Mouse mammary cell enrichment kit, StemCell Technologies), anti-CD49f- FITC (10 μl/test, Mouse mammary cell enrichment kit, StemCell Technologies) or anti-Sca1-APC (0.06 μg/test, eBioscience, San Diego, CA, USA) for 30 min on ice, followed by washing and resuspending in HBSS supplemented with 2% FBS. Analysis and sorting were performed by using a FACSVantage TurboSort SE (BD Biosciences). The data were analyzed using BD FACS Sortware sorter software. For analysis of ERα expression in Sca1+CD24highCD49f+ and Sca1CD24highCD49f+ luminal cell populations, sorted cells from Tip30/ virgin mice (n=6) were collected and allowed to adhere to a collagen coated 96-well plate before fixation and then analyzed by immunocytochemistry with anti- ERα (MC-20, 1 : 50; Santa Cruz Biotechnology) and inverted microscopy (Nikon Eclipse Ti, Melville, NY, USA).
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