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2 7 dichlorofluorescein diacetate dcfda cellular ros detection assay kit

Manufactured by Abcam
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2′,7′-dichlorofluorescein diacetate (DCFDA)-cellular ROS detection assay kit is a fluorescent probe used to measure reactive oxygen species (ROS) levels in cells. The kit provides a convenient and sensitive method for the detection of intracellular ROS.

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6 protocols using 2 7 dichlorofluorescein diacetate dcfda cellular ros detection assay kit

1

Wedelolactone-Loaded Nanoformulation for Cancer Therapy

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Wedelolactone was provided by Chengdu Pufei De Biotech Co., Ltd. (purity > 98.0%, Chengdu, China). Prednisone acetate was from Huazhong Pharmaceutical Co., Ltd. (Xiangyang, China). Doxorubicin hydrochloride for injection was obtained from KeyGen. Co. Ltd. (Nanjing, China). Lecithin (average molecular weight: 760 g/mol) was purchased from Shanghai Advanced Vehicle Technology Pharmaceutical Ltd (Shanghai, China). Solutol® HS15 (molecular weight: 963 g/mol) was purchased from Sigma-Aldrich (St. Louis, MO, USA). Acetic acid, acetonitrile, and methanol were Chromatographic Grade and were obtained from Tedia Company Inc. (Fairfield, USA). A 2′,7′-dichlorofluorescein diacetate (DCFDA)-cellular ROS detection assay kit was obtained from Abcam (Cambridge, UK). The other reagents are analytical.
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2

Assay Reagents for Oxidative Stress

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Water-soluble progesterone (PG), anesthetic MS-222 and apocynin were obtained from Sigma (St. Louis, MO, USA). Collagenase (280 U/mg) and catalase (11,000 U/mg) were purchased from Wako (Osaka, Japan), hCG was from Teikoku Zoki (Tokyo, Japan). Fluorogenic caspase-3 substrate IV was purchased from Calbiochem (La Jolla, CA, USA). Hydrogen peroxide colorimetric/fluorometric assay kit was from BioVision (Milpitas, CA, USA). Polyclonal anti-MAPK and anti-pMAPK antibodies were from Cell Signaling (Beverly, MA, USA), biotinylated anti-rabbit IgG was from Vector Laboratories (Burlingame, CA, USA). The Streptavidin Biotin Complex Peroxidase Kit, protein assay CBB solution, SOD (5000 U/mg) and BHA were from Nacalai Tesque (Kyoto, Japan). 2′,7′-dichlorofluorescein diacetate (DCFDA) Cellular ROS Detection Assay Kit was obtained from Abcam (Cambridge, UK), EUK 134 and MITO-TEMPO were ordered from Santa Cruz (Santa Cruz Biotechnology, Dallas, TX, USA). Other chemicals were obtained from Wako and Nacalai Tesque.
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3

Cellular Assays in Cell Death Research

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DMEM medium, DMEM red-phenol-free medium, RPMI 1640 medium, RPMI 1640 red-phenol-free medium, fetal bovine serum (FBS), L-glutamine and penicillin-streptomycin were purchased from Gibco BRL (Cergy-Pontoise, France). 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), N-acetyl-L-cysteine (NAC), 3-methyladenine (3-MA), anti-β-actin antibody, 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolocarbocyanine iodide (JC-1) and cell death detection enzyme-linked immunosorbent assayPLUS (ELISA) were obtained from Sigma-Aldrich (Saint-Quentin-Fallavier, France). Beclin-1, Atg5 and LC3 antibodies were acquired from Cell Signaling Technology—Ozyme (Saint-Quentin-en-Yvelines). 2’,7’-dichlorofluorescein diacetate (DCFDA) cellular ROS detection assay kit and goat anti-rabbit IgG H&L horseradish peroxidase (HRP) secondary antibody were purchased from Abcam (Paris, France). LysoTracker, MitoTracker, rabbit anti-mouse IgG-IgM H&L HRP secondary antibody, TO-PRO-3, annexin V-FITC and propidium iodide (PI) were obtained from Invitrogen—Thermo Fisher Scientific (Villebon-sur-Yvette, France). Immobilon Western Chemiluminescent HRP Substrate was acquired from Merck (Lyon, France). Caspase-3/7 green reagent was purchased from Sartorius (Göttingen, Germany).
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4

Quantifying ROS in ARPE-19 Cells

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ARPE-19 cells were seeded into 96-well black/clear bottom plates (Greiner Bio-One, Kremsmünster, Austria) for the determination of Reactive Oxygen Species (ROS). The 2′,7′-dichlorofluorescein diacetate (DCFDA)-Cellular ROS Detection Assay kit was used for the detection (Abcam, Cambridge, UK). DCFDA, which is initially non-fluorescent, is oxidized to DCF, a highly fluorescent molecule, and its intensity was measured using the BioTek Cytation cell imaging multimode microplate reader (BioTek U.S., Winooski, VT, USA) in end point mode at Ex/Em = 485/535 nm. The microplate reader’s imaging acquisition mode enabled the capture of fluorescence pictures of each well, which were utilized to calculate the number of cells.
ROS generation was then represented as a percentage relative to the control as the fluorescence intensity normalized to the number of cells.
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5

Measuring Oxidative Stress in RPE Cells

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RPE cells were seeded (2 × 104 cells/well) in black/clear-bottom 96-well plates and grown for 48 hr in RPE media containing 1% FBS, no sodium pyruvate. The formation of intracellular ROS was assessed using the 2′,7′-dichlorofluorescein diacetate (DCFDA) cellular ROS detection assay kit (abcam, Cambridge, MA) following the manufacturer's protocol. Cells were incubated with DCFDA (25 μM) for 45 min, washed once with fresh media, and incubated with NAC (500 μM) for 1 hour. Subsequently, cells were incubated with 75 μM t-BHP for 3 hours. ROS content was calculated based on the fluorescence of treated cells relative to the fluorescence of untreated cells. Fluorescence was read on a microplate reader (BioTek, Synergy 2).
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6

Measuring Cellular Reactive Oxygen Species

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The 2′,7′-Dichlorofluorescein Diacetate (DCFDA) Cellular ROS Detection Assay Kit (Abcam, Cambridge, UK, ab113851) was used for the determination of ROS levels. A total of 1.5 × 105 control and HGPS fibroblasts were seeded in parallel in culture plates and were treated with the drug regimens as described in Section 4.2. After 8 days of treatment, 2.0 × 104 cells were transferred into 96-well plates with the indicated drug treatment and left attached overnight. After 9 days of drug treatment, the cells were incubated with 25 µM DCFDA for 45 min at 37 °C. The cell-permeating reagent DCFDA diffuses into the cell where it is deacetylated by esterases and then reacts with intracellular ROS to form the fluorescent compound DCF. Accordingly, DCF was detected by using FLUOstar Omega microplate reader (BMG Labtech, Ortenberg, Germany, Ex: 485 nm; Em: 520 nm). All measurements were repeated in at least three independent experiments.
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