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ROS-Specific Neutralization of Bioactive Compounds: An Optical Approach.
Tomás J Buenfil-Chi1, Hilda Mercado-Uribe1, Francisco J Sierra-Valdez2
1CINVESTAV - Monterrey, Parque PIIT, Autopista al Aeropuerto, km. 9.5, Apodaca, Nuevo León 66600, México.
ACS Omega
|July 7, 2025
Summary
This study introduces a novel optical method to assess how bioactive compounds neutralize specific reactive oxygen species (ROS). The findings reveal unique antioxidant profiles and highlight the impact of pH and carrier systems on their efficacy.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Pharmacology
Background:
- Reactive oxygen species (ROS) are byproducts of metabolism that cause oxidative stress and inflammation.
- Existing analytical methods lack the specificity to compare antioxidant capacity against different ROS.
- Oxidative stress is implicated in various pathologies, necessitating effective antioxidant strategies.
Purpose of the Study:
- To develop and validate an optical method for evaluating ROS-specific neutralization capacity of bioactive compounds.
- To analyze the influence of pH, carrier systems (liposomes), and compound synergy on antioxidant activity.
- To characterize the ROS neutralization profiles of 11 natural antioxidants against four key ROS.
Main Methods:
- Development of a novel optical assay to measure ROS neutralization.
- Testing 11 natural antioxidants against singlet oxygen (1O2), hydroxyl radical (OH-), hydrogen peroxide (H2O2), and superoxide radical (O2-).
- Evaluation of compound performance under varying pH conditions and within liposomal carrier systems.
Main Results:
- Each natural antioxidant exhibited a distinct ROS neutralization signature.
- Liposomes significantly modulated the ROS neutralization properties of antioxidants.
- pH influenced the structural state and efficacy of antioxidants.
- Synergistic and antagonistic effects were observed between antioxidant dyads.
Conclusions:
- The developed optical method provides a versatile tool for characterizing specific ROS neutralization.
- Understanding compound-specific ROS interactions is crucial for optimizing antioxidant formulations.
- Findings have implications for improving antioxidant drug delivery and formulation in the cosmetic and food industries.
