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2 protocols using pepstatin

1

Histological and Biochemical Analyses of Reproductive Tissue

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After behavioral experiments, all animals were euthanized with chloral hydrate (350 mg/kg) during the estrus phase. To measure histology analysis, we performed hematoxylin and eosin (H&E) and Masson's trichrome staining and the clitoral and vaginal tissues were either fixed in 10% buffered formalin or snap frozen in liquid nitrogen. Blood was collected by cardiac puncture. Serum was extracted from the blood samples. To perform enzyme-linked immunosorbent assay (ELISA), tissue homogenates were prepared in ice-cold buffer containing 50 mM Tris and 150 mM NaCl (pH 8.0) and supplemented with 1 mM EDTA, 0.1 mM phenylmethanesulfonyl fluoride, and 1 μg/mL each of aprotinin, leupeptin, and pepstatin (Beyotime Biotech, Shanghai, China) using a homogenizer (OSE-Y50; TIANGEN, Beijing, China), followed by centrifugation at 11,000 g for 15 minutes at 4°C.
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2

Membrane Protein Expression Analysis

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Cells were harvested and lysed using RIPA buffer (Beyotime) supplemented with PMSF (Beyotime), leupeptin (Beyotime) and pepstatin (Beyotime). The membrane proteins were extracted by Mem-PER™ Plus Membrane Protein Extraction kit (Thermo Fisher, USA). The protein concentrations of lysate were determined by bicinchoninic acid (BCA) assay. Protein extracvts were subjected to SDS-PAGE analysis and transferred to polyvinylidene difluoride (PVDF) membrane after electrophoresis. The membranes were blocked with 5% BSA buffer followed by antibody hybridization and then visualized in G-BOX gel imaging system (Chemi XR 5, Syngene). Antibodies and dilution ratio in this study include anti-OCT2 (HPA008567, Sigma-Aldrich) at 1:200 dilution, anti-GAPDH (KC-5G4, Kangchen) at 1:5000 dilution, anti-ATP2A2 (AB54032, Sangon Biotech) at 1:5000 dilution, anti-ENT1 (11337-1-AP, proteintech) at 1:1000 dilution, anti-HIF-1α (610958, BD Biosciences), (NB100-105, Novus) at 1:800 dilution, anti-HIF-2α (NB100-122, Novus) at 1:1000 dilution, anti-H3K27ac (ab4729, Abcam) at 1:3000 dilution, anti-H3K18Ac (ab1191, Abcam) at 1:3000 dilution and anti-H3 (ab1791, Abcam) at 1:3000 dilution.
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