Rosindol: New Fluorescent Probe Enables Precise Measurement of Reactive Oxygen Species in Living Cells
Researchers have developed Rosindol, a thioacetal-based fluorogenic probe capable of quantitatively measuring reactive oxygen species (ROS) in living cells with greater accuracy than existing tools. Current ROS probes suffer from oxidation non-specificity, pH sensitivity, and nonlinear signals, limiting their reliability in biological research. Rosindol's improved precision could advance understanding of oxidative stress in diseases including cancer.
Scientists have introduced Rosindol, a novel fluorogenic probe designed to overcome longstanding limitations in measuring reactive oxygen species (ROS) — unstable molecules implicated in a wide range of diseases. Unlike conventional probes, Rosindol produces dose-linear fluorescence responses, is pH-independent, photostable, water soluble, and unaffected by glucose concentration, esterase activity, or ambient oxygen levels. The probe was validated in human cells, including PMA-stimulated neutrophils and superoxide dismutase (SOD) knockout models, demonstrating accurate detection of ROS in both cytosolic and mitochondrial compartments. In pancreatic cancer cells, Rosindol revealed a fourfold increase in mitochondrial superoxide generation capacity through Complex I of the electron transport chain. Additionally, glucose stimulation produced twofold higher ROS generation in malignant cells compared to normal cells, suggesting a mechanistic link between the Warburg metabolic phenotype and oxidative stress in pancreatic cancer. The study, posted as a preprint on bioRxiv, positions Rosindol as a potentially valuable tool for investigating oxidative biology in complex living systems.
What's missing
As a preprint, this work has not yet undergone formal peer review, and independent replication has not been reported. The study does not address Rosindol's potential cytotoxicity at the concentrations used, its performance in in vivo (whole-organism) models, or its selectivity across the full spectrum of individual ROS species (e.g., hydrogen peroxide vs. superoxide vs. hydroxyl radical). Scalability for high-throughput screening is also not characterized.
What different sources said
- bioRxivCenter
Rosindol: A fluorogen for the quantitative measurement of reactive oxygen species in living cells
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