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Design of Peptide-Based Probes for the Microscale Detection of Reactive Oxygen Species
Chun-Lan Keng1, Ying-Chi Lin2, Wei-Lung Tseng3
1Research Center for Environmental Medicine, Kaohsiung Medical University , Kaohsiung 80708, Taiwan.
Abstract:
Reactive oxygen species (ROS) can induce oxidative stress and are associated with cell death and chronic diseases in organisms. In the treatment of disease, drugs that induce ROS are associated with many side effects and unpleasant symptoms. Therefore, during the assessment of new drugs and candidate compounds, ROS generation is an issue of concern, because ROS can modify proteins, lipids, and nucleic acids within organisms and alter their biological functions. In this work, we designed a peptide-based probe for the rapid (<10 min) high-throughput survey of oxidative stress induced by clinical drugs at the microliter level. Using menadione and H2O2 as positive controls, just 100 μg/mL of the test compound and 100 μg/mL of the probe were sufficient to effectively monitor the generation of ROS, which is important as many active compounds are rare and difficult to isolate or purify. This in vitro evaluation could be used to effectively generate preliminary data before pharmacologically active candidate compounds are processed in cell-line or animal tests. Furthermore, we demonstrated that this peptide probe successfully detects ROS in biological samples.
Insights
This study introduces a novel peptide probe for rapid detection of reactive oxygen species (ROS) and oxidative stress induced by drugs. The probe enables efficient early-stage drug screening, minimizing side effects and improving safety assessments.
Area of Science:
- Biochemistry
- Pharmacology
- Chemical Biology
Background:
- Reactive oxygen species (ROS) contribute to oxidative stress, cell death, and chronic diseases.
- Drug-induced ROS generation causes side effects, necessitating careful compound assessment.
- ROS can alter biological functions by modifying proteins, lipids, and nucleic acids.
Purpose of the Study:
- To design a peptide-based probe for rapid, high-throughput screening of drug-induced oxidative stress.
- To enable early-stage in vitro evaluation of candidate compounds before cell-line or animal testing.
- To develop a sensitive method for detecting ROS generation at low compound concentrations.
Main Methods:
- Design and synthesis of a novel peptide-based fluorescent probe.
- High-throughput screening assay for oxidative stress detection at the microliter level.
- Validation using menadione and H2O2 as positive controls for ROS generation.
Main Results:
- The peptide probe achieved rapid (<10 min) detection of ROS.
- Effective ROS monitoring was achieved with low concentrations (100 μg/mL) of test compounds and probe.
- The probe successfully detected ROS in biological samples, demonstrating its practical applicability.
Conclusions:
- The developed peptide probe offers a sensitive and efficient tool for assessing drug-induced oxidative stress.
- This method facilitates early-stage drug discovery by providing crucial safety data.
- The probe's ability to detect ROS in biological samples highlights its potential for broader applications in toxicology and diagnostics.
