New Product Launch│Singlet Oxygen (¹O₂) Fluorometric Assay Kit Enables Precise Live-Cell ROS Detection

Singlet oxygen (¹O₂) is a highly reactive excited state of molecular oxygen, often described as the "precision striker" of the ROS family. Unlike superoxide anion or hydroxyl radicals, ¹O₂ plays a critical role in photodynamic therapy (PDT), oxidative stress, anti-photoaging, and plant stress responses.

Elabscience^® now introduces Singlet Oxygen(¹O₂) Fluorometric Assay Kit (Cat. No.: E-BC-F062), enabling highly specific, real‑time quantitative detection of ¹O₂ in living cells.

Table of Contents

1. Detection principle of the Singlet Oxygen fluorometric assay

2. Experimental validation in live cells

3. Representative research applications

4. Complete solutions for ROS detection

01 Detection principle of the Singlet Oxygen fluorometric assay

The kit employs a highly selective singlet‑oxygen fluorescent probe based on a turn‑on design. The probe itself exhibits very weak background fluorescence (“OFF” state). Upon specific chemical reaction with singlet oxygen, its molecular structure changes, releasing a strong green fluorescence signal (λ ≈ 525 nm, “ON” state). This reaction is highly specific to ¹O₂ and is not interfered by other reactive oxygen species. The increase in fluorescence intensity is directly proportional to ¹O₂ concentration, allowing specific recognition and precise quantification.

02 Experimental validation in live cells

Experimental setup: HeLa cells were treated with 100 μmol/L hydrogen peroxide for 30 min to induce singlet oxygen production. Cells were stained following the kit protocol and analyzed with different instruments.

2.1 Flow cytometry (FITC channel, 5×10⁴ cells per sample)

Fig. 1 Flow cytometry results.

2.2 Fluorescence microscopy (green channel)

Fig. 2 Representative images of control and stimulated groups.

03 Representative research applications

3.1 Photodynamic Therapy (PDT) Research and Evaluation

● Real‑time monitoring of ¹O₂ production in tumor cells and immune cells during PDT.

● Rapid screening of photosensitizers and optimization of light/drug delivery protocols.

3.2 Cellular Oxidative Stress and Cell Death Mechanisms

● Monitoring intracellular ¹O₂ bursts induced by external stimuli (drugs, pollutants, UV irradiation).

● Correlating ¹O₂ levels with lipid peroxidation, DNA damage, and apoptosis/autophagy pathways.

3.3 Antioxidant/Active Ingredient Efficacy Testing

● Directly evaluating the ¹O₂‑scavenging capacity of natural products, compounds, and cosmetic ingredients at the cellular level.

● Providing intuitive data to support anti‑photoaging and antioxidant efficacy claims.

04 Complete solutions for ROS detection

Table 1. Fluorometric assay kits for ROS and related oxidative molecules

Elabscience^® remains dedicated to advancing life science research by providing reliable, efficient, and cost‑effective detection solutions. Follow Elabscience^® for the latest product releases, technical resources, and application insights.