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Analysis of Reactive Oxygen Species(ROS) by Flow Cytometry (CAT#: STEM-CBT-0071-WXH)

Introduction

Reactive oxygen species (ROS) are molecules containing hydroxyl radicals or peroxides with unpaired electrons. In healthy aerobic cells, ROS are produced naturally as a byproduct of oxidative phosphorylation, oxidoreductase enzymes, or metal catalyzed oxidation at a controlled rate. However, ROS can be induced under some stress conditions especially exposure to environmental oxidants and certain drugs that leads to oxidative stress. Exceed ROS can cause damages in the building blocks of cells including DNA, proteins, and lipids, and eventually results in cell death.
Flow cytometry has emerged as an effective rapid method to specifically detect intracellular ROS. The major advantage of flow cytometry is that, unlike other available methods, intracellular ROS levels can be evaluated on a cell-by-cell basis in the absence of tissue background.




Principle

Cell-permeant 2', 7'-dichlorodihydrofluorescein diacetate (H2DCFDA) is a widely used ROS indicator. The reduced non-fluorescent fluorescein H2DCFDA can be oxidized and converted into fluorescent 2’, 7’-dichlorofluorescein (DCF) by intracellular ROS. In this protocol, we applied H2DCFDA to label the intracellular ROS and detected the DCF intensity by flow cytometry.

Applications

• To understand the changes in ROS in some physiological and pathological states of cells.
• To analyze drug effects and related mechanisms.
• Cancer research.
• Studies in immunology.
• Studies in food laboratories.
• Studying the mechanism of some diseases.
• Evaluating the effectiveness of antioxidants.

Procedure

1.Sample preparation
2.Add indicator
3.Submit samples to flow cytometry for ROS detection

Materials

H2DCFDA(2', 7'-dichlorodihydrofluorescein diacetate)

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