Self-Cyclizing Antioxidants to Prevent DNA Damage Caused by Hydroxyl Radical
Safnas F AbdulSalam1, Purujit N Gurjar1, Haizhou Zhu1
1Department of Chemistry, University of Cincinnati, 404 Crosley Tower, Cincinnati, OH, 45221, USA.
Chembiochem : a European Journal of Chemical Biology
|August 16, 2017
Summary
New self-cyclizing antioxidants selectively target harmful hydroxyl radicals, protecting DNA from oxidative stress. These reagents offer a promising strategy for limiting cellular damage caused by reactive oxygen species (ROS).
Area of Science:
- Chemistry
- Biochemistry
- Toxicology
Background:
- Reactive oxygen species (ROS) cause DNA damage, necessitating protective strategies.
- Antioxidant therapy is a key approach to mitigate oxidative stress.
- Developing selective and efficient antioxidants is crucial for therapeutic applications.
Purpose of the Study:
- To synthesize and characterize novel self-cyclizing antioxidant reagents.
- To investigate the mechanism of action and selectivity for hydroxyl radicals.
- To evaluate the efficacy of these antioxidants in cellular models of oxidative stress.
Main Methods:
- Synthesis of novel self-cyclizing antioxidant compounds.
- Mechanistic studies involving cascade reactions with oxidants.
- In vitro and cellular assays to assess antioxidant properties.
- Evaluation of guanine oxidation product formation and ROS levels.
Main Results:
- Novel self-cyclizing antioxidants selective for hydroxyl radicals were developed.
- A cascade reaction mechanism was elucidated, forming a bicyclic product.
- Compound 1c demonstrated favorable in vitro and cellular efficacy.
- 1c prevented guanine oxidation and reduced cellular ROS levels induced by As2O3.
Conclusions:
- Self-cyclizing antioxidants are efficient, tunable, and effective in protecting against ROS-induced DNA damage.
- These reagents show potential for limiting toxic oxidative stress in biological systems.
- Further development could lead to new therapeutic interventions for oxidative stress-related diseases.
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