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20 protocols using beckman fc500

1

Apoptosis and Cell Cycle Analysis

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Apoptosis assay was performed by fluorescein isothiocyanate-conjugated Annexin V (Annexin V-FICT) and propidium iodide (PI) double staining after cell culture for five days, when a confluence of 80% or more was achieved. The cells were harvested with 0.25% trypsin, washed with PBS and stained with Annexin V-FITC/PI apoptosis kit (Bestbio, China) according to the manufacturer’s instructions and analyzed by flow cytometry (Beckman FC500, USA).
Cells for cell cycle assay were cultured in RPMI serum-free medium for 24 hrs. The medium was changed to RPMI with 10% fetal bovine serum and the cells were cultured for 24 hrs. Cells were collected, fixed in ice-cold 75% ethanol and stored in −20°C for one hour. The fixed cells were washed with PBS, treated using cell cycle kit (Bestbio, China) according to the manufacturer’s instructions and analyzed by flow cytometry (Beckman FC500, USA).
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2

Quantifying Cell Apoptosis via Annexin V

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Annexin V (FITC) Apoptosis Detection kit (BD Biosciences, San Diego, CA, USA) was recruited to test cell apoptosis. After 48 hrs of lentivirus infection, NCI-N87 and MKN28 cells were collected with 0.25% of EDTA‑free trypsin (Thermo Fisher Scientific) and washed with PBS for one time. Subsequently, the cells were incubated with 100 μL of 1X binding buffer solution containing 5 μL of Annexin V and 5 μL PI solution for 15 mins in the dark. Then, the cells were washed with 1X of binding buffer for three times and resuspended with 500 μL of 1X binding buffer. Cell apoptosis was detected with a Beckman FC500 flow cytometer (Beckman Coulter, Inc., Brea, California, USA) and analyzed by FlowJo 7.6 software.
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3

Annexin V-FITC/PI Apoptosis Assay

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Cell apoptosis was analyzed by Annexin V-FITC/PI Apoptosis Detection Kit according to the manufacturer's protocol (Sigma-Aldrich Co., St. Louis, MO). Briefly, cells (H1650, A549, and PC9) were seeded in 6-well plates. After 24 h of culture, cells were treated with increased doses of FZKA and then incubated at 37°C for 24 h. Afterwards, cells were collected, centrifuged for 5 min at 1500 rpm, and resuspended in 1x binding buffer. Finally, 5 μL Annexin V-FITC and 5 μL PI were added to the cells at room temperature for 15 min. The cells were then analyzed using flow cytometer (Beckman FC 500, Beckman Coulter, Inc., CA, USA).
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RABV-Induced Apoptosis Evaluation

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NA cells were infected with RABV at an MOI of 3 and harvested at 24 hpi. Cells were stained with the Annexin V-FITC apoptosis kit (BestBio, Shanghai, China) according to the manufacturer’s protocols. Flow cytometry was performed on a Beckman FC500 flow cytometer (Beckman Coulter, Fullerton, CA, USA). Data were analyzed using CXP Software.
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5

Annexin V-FITC/PI Apoptosis Assay

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Cell apoptosis was performed using Annexin V-FITC/PI apoptosis detection kit according to the manufacturer’s protocol (Sigma-Aldrich Co. St. Louis, MO), as previously performed [13 ]. In brief, NSCLC cells (A549 and PC9) were grown in 6-well plates. After 24 h of culture, cells were treated with FZKA and Gefitinib in different groups and then incubated at 37 °C for 24 h. Afterwards, cells were collected, centrifuged for 5 min at 1500 rpm, and resuspended in 1× binding buffer. Finally, 5 μL Annexin V-FITC and 5 μL PI were added into the cells at room temperature for 15 min. The cells were then analyzed using flow cytometer (Beckman FC 500, Beckman Coulter, Inc, CA, USA).
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6

Apoptosis Detection and Quantification

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An Annexin V‐FITC/PI apoptosis detection kit (Catalog: G003‐1–3) was used to detect cell apoptosis. After the experimental procedure, the cells of the different treatment groups were collected and washed three times with PBS. Then, the cells were resuspended with a prepared binding buffer (100 μL) and adjusted to a density of 1 × 106 /ml. 100 μL of cell suspension was inoculated into a 5‐mL flow tube and stained with 5 μL Annexin V‐FITC and 5 μL PI that incubate away from light at room temperature for 15 min. Finally, the apoptosis rate was analyzed by flow cytometry (Beckman FC500, Beckman Coulter, Inc.).
Hoechst‐33258 (Beijing Solarbio Science & Technology, Beijing, China, Catalog: IH0060) is a specific DNA dye that can detect cell apoptosis through fluorescence intensity. After the experimental procedure, the cell culture medium of 24‐well plates in each group was discarded, and H9c2 cardiomyocytes were washed three times with PBS. Then, 500 μL/well of Hoechst‐33258 staining solution (10 μg/mL) was added to each group of cells and incubated at 37 ℃ for 20 min. Next, the dye was removed, and the cells were rinsed twice with PBS, and a fluorescence microscope was used for fluorescence image collection. Image‐Pro Plus 6.0 software was used for quantification.
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7

Apoptosis Analysis by Flow Cytometry

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Flow cytometry was performed as described previously (Wang et al., 2018 (link)). Cell apoptosis was analyzed by Annexin V-FITC/PI apoptosis detection kit according to the manufacturer’s protocol (Sigma-Aldrich Co. St. Louis, MO). Briefly, cells (CNE-2, H1299, and HSF) were seeded in 6-well plates. After 24 h of culture, cells were treated with CKI, IR, or IR combined with CKI, and then incubated at 37°C for 24 h. Afterwards, cells were collected, centrifuged for 5 min at 1,500 rpm, and resuspended in 1 × binding buffer. Finally, 5 μL Annexin V-FITC and 5 μL PI were added into the cells at room temperature for 15 min. The cells were then analyzed using flow cytometer (Beckman FC 500, Beckman Coulter, Inc., CA, United States).
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8

Flow Cytometry Analysis of Cell Cycle and Apoptosis

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Cells were quantified using a Cell Cycle and Apoptosis Analysis kit (cat. no. C1052; Beyotime Institute of Biotechnology), according to the manufacturer's protocol. MC-4 cells were pretreated with pPeOp (30, 60 or 90 µg/ml), 90 µg/ml PVP or 100 µg/ml 5-FU prior to culturing at 37°C for 24 h in a humidified atmosphere containing 5% CO2. The cells were subsequently washed with phosphate-buffered saline (PBS) three times and fixed with 70% ice-cold ethanol at 4°C overnight. The cells were centrifuged, washed with PBS, treated with 20 µl RNase A in a water bath at 37°C for 30 min, and placed in the dark at 4°C for 30 min with 300–500 µl propidium iodide solution. The cell cycle distribution of the cells was determined using a Beckman FC500 flow cytometer (Beckman Coulter, Inc., Brea, CA, USA) with red fluorescent light at a wavelength of 488 nm.
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9

Phenotyping Cell Differentiation via Flow Cytometry

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In order to determine the different phenotypes of cell differentiation, flow cytometry was used. PBMCs and splenocytes from CIA mice, as well as cultured Th17 cells in vitro, were collected. Cells were then washed twice with PBS and activated with leukocyte activation cocktail (BD Pharmingen) for 4 h. After staining of Th17 cells with anti-CD4-FITC (BD Pharmingen) and anti-IL-17A-PE (BD Pharmingen) for 30 min, intracellular cytokines were analyzed by flow cytometry (Beckman FC-500, Beckman Coulter, Inc., Brea, CA, USA).
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10

Apoptosis Evaluation of C. albicans

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Flow cytometry was performed using the Annexin V-FITC/PI Apoptosis Detection Kit (Yeason, Beijing, China). After the treatment of 15 μg/mL EVs and PBS control at 37 °C for 6 h, C. albicans was centrifuged at 300 g for 5 min at 4 °C. The precipitate was washed twice with pre-cooled PBS. After the centrifugation to collect the precipitate, PBS was discarded, and then resuspended with 100 μL binding buffer. Then, 5 μL Annexin V-FIFC and 10 μL PI were added and the samples were mixed well. After the reaction at room temperature for 10–15 min in the dark, 400 μL binding buffer was added. A flow cytometer (Beckman FC500, Carlsbad, CA, USA) was used for analysis, and the excitation and emission wavelengths were set to 488 and 525 nm, respectively. All experiments were performed in triplicate.
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