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208 protocols using fitc annexin 5 apoptosis detection kit 2

1

Cell Cycle and Apoptosis Analysis

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For cell cycle analysis, after 48 h treatment with UA (20 μM) or/and DIM (50 μM), TE-8 and TE-12 cells were collected, rinsed twice with cold DPBS, and fixed with 75% ethanol for 2 h at –20°C. Fixed cells were re-suspended in DPBS and stained with propidium iodide (PI, Sigma) for 30 min. For FITC/Annexin V staining analysis, cells were stained using a FITC Annexin V Apoptosis Detection Kit II (Becton-Dickinson Biosciences) at 37°C for 30 min. Stained cells were examined by a FACStar flow cytometer (Becton-Dickinson) and analyzed with Becton-Dickinson software.
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Apoptosis Evaluation via Annexin V

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Apoptosis was determined by staining the cells with FITC Annexin V Apoptosis Detection Kit II (Becton-Dickinson Biosciences, CA, USA). The cells were harvested after incubation with UA (0, 10, 25 or 50 µM) 48 h and stained with Annexin V-FITC for 30 min. at 37 °C. The cells analyzed using a FACStar flow cytometer (Becton-Dickinson, San Jose, CA, USA).
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Flow Cytometry Analysis of Resveratrol-Induced Apoptosis

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The flow cytometry method was used to study the intensity of the apoptotic induction under the effect of resveratrol. The cells of the tested lines (EPP85-181P, EPP85-181RNOV, AsPC-1 and H6c7) were cultured in 25 cm2 flasks for 24 h (37 °C, 5% CO2). After this time, cells were treated with resveratrol at concentrations of 0, 25, 50 and 100 µM for 48 h (37 °C, 5% CO2). Subsequently, they were trypsinized and then centrifuged (1050 rpm, 5 min) in fresh culture medium. Cells were then rinsed twice in PBS solution and centrifuged afterwards (1050 rpm, 5 min). Cells were diluted to 1 × 106 cells/mL and stained with the FITC Annexin V Apoptosis Detection Kit II (Beckton Dickinson, Franklin Lakes, NJ, USA) according to the manufacturer’s instructions. Data from at least 10,000 events were collected for each sample. The results obtained were further analyzed with the FlowJo 10.5 software (FlowJo, Asham, OR, USA). The experiment was carried out in three independent laboratory replications.
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Apoptosis Assay Kit Protocols

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The APO-DIRECT TUNEL kit and FITC Annexin V Apoptosis Detection Kit II were obtained from Becton–Dickinson (BD Pharmingen, San Diego, CA, USA). Thiazole orange (TO), hydroethidine (HE), 3,3′-dihexyloxacarbocyanine iodide [DiOC6(3)], carbonyl cyanide m-chlorophenylhydrazone (CCCP) were obtained from Sigma-Aldrich (St Louis, MO, USA). Albumax II was obtained from Gibco (Gran Island, NY, USA).
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5

Luminacin-Induced Apoptosis Quantification

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Quantitative analysis of apoptotic cell death caused by Luminacin was performed using the FITC Annexin V Apoptosis Detection kit II (Becton Dickinson, Franklin Lakes, NJ), following the manufacturer’s protocols. Briefly, cells were plated at 1×106 cells/well in a 6-well plate, incubated for 16 hours, and then treated with luminacin (0, 1, 2.5, 5, 10, or 20 μM) for 24 hours. The cells were harvested, washed with cold PBS, and subjected to Annexin V–FITC and PI staining in binding buffer at room temperature for 10 minutes in the dark. The stained cells were analyzed by fluorescence-activated cell sorting (FACS ARIA3, BD Biosciences, San Jose, CA) using WinMDI 2.9 software (Purdue University Cytometry Laboratories, West Lafayette, IN).
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6

Establishing HL-7702 Cell I/R Injury Model

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To construct the HL-7702 I/R injury model, HL-7702 cells were cultured in glucose-free RPMI 1640 medium (Gibco BRL/Life Technologies Inc.) and incubated in an oxygen-free atmosphere (95% N2 and 5% CO2 at 37°C) for 12 hours. Then, cells were cultured in normal RPMI 1640 medium under normal atmosphere (95% air and 5% CO2 at 37°C) for 24 hours (according to previous experiments in the hepatic I/R injury model16 (link),17 (link)). The cell apoptosis rate was detected using the FITC Annexin V Apoptosis Detection Kit II (Becton, Dickinson Co., Franklin Lakes, NJ, USA) with propidium iodide (AV/PI) according to the manufacturer’s instructions to establish the HL-7702 I/R injury model.
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7

Annexin V Apoptosis Assay

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After treatment with UA (0, 10, 20, 30, 40, or 50 µM) for 48 h, the TE-8 and TE-12 cells were harvested for the detection of apoptosis cells using the FITC Annexin V Apoptosis Detection Kit II (Becton Dickinson Biosciences, CA, USA). The cells were stained with Annexin V-FITC for 30 min at 37 °C and detected using an FACStar flow cytometer.
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8

Quantitative Analysis of Radiation-Induced Apoptosis

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A quantitative analysis of apoptotic cell death caused by radiation was performed using a FITC Annexin V Apoptosis Detection kit II (Becton Dickinson, Franklin Lakes, NJ, USA). Cells were stained using an Annexin V-FITC apoptosis detection kit, following the manufacturer's protocol. Briefly, HaCaT cells were plated at 3×105 cells/well in a 6-well plate, incubated for 24 h, and then treated with KR22332 (10 µg/mL) only, radiation only (8 Gy), or radiation (8 Gy) plus KR22332 (10 µg/mL) for 72 h. The cells were then harvested, washed with cold PBS, and subjected to Annexin V-FITC and PI staining in binding buffer at room temperature for 10 min in the dark. The stained cells were analyzed by fluorescence-activated cell sorting (FACS ARIA3; BD Biosciences, San Jose, CA, USA) using WinMDI 2.9 software.
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9

Cell Proliferation and Apoptosis Evaluation

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Cell proliferation was detected 36 hours after transfection using the Cell Counting Kit-8 (Sangon, China) according to the manufacturer’s instructions. The cell apoptosis rate was detected 36 hours after transfection using the FITC Annexin V Apoptosis Detection Kit II with propidium iodide (AV/PI) (Becton, Dickinson Co.) according to the manufacturer’s instructions. In addition, expression of apoptotic markers cleaved caspase 3 (C-Caspase 3) and B-cell lymphoma-2 (Bcl-2) were detected at 36 hours after transfection using western blot, according to the detailed process described later.
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10

Annexin V Apoptosis Detection Protocol

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To detect apoptosis, we used the FITC Annexin V Apoptosis Detection Kit II (Becton Dickinson, USA). Annexin V conjugated with FITC has high affinity to phosphatidylserine, which is translocated to the outer part of cellular membrane in the early steps of apoptosis. To distinguish apoptosis and necrosis, propidium iodide (PI) staining was performed. After 6 h of treatment with the test inhibitors and drugs, cells were prepared as described in the manufacturer instructions and analyzed with a LSRII flow cytometer (Becton Dickinson, USA). For each experiment, positive (cells exposed to 100 µM camptothecin), negative (untreated cells), and unstained control samples were prepared. It is known, that apoptosis can be measured after different times of exposure to compounds: from short (4-6 h), medium (24 h) to long (48 h). We decided to choose 6 h treatment with drugs due to high cytotoxic effect observed after treatment with drugs. The apoptosis ratio was defined as a percentage of apoptotic (FITC-Annexin V positive, PI negative) cells in the sample, while necrotic cells as the percentage of PI positive cells. All experiments were performed in triplicate.
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