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Targeting NRF2 With Isoeugenol: A Promising Small Molecule for Neurodegenerative, Metabolic, and Chronic Inflammatory
Ana Silva1,2,3,4, Sónia Silva2,3, Beatriz Rodrigues1,3,4,5
1Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, 3000-548, Portugal, uc.pt.
Abstract:
Oxidative stress, driven by an imbalance between oxidants and antioxidants, disrupts redox homeostasis and contributes to the development of chronic diseases, including cancer, diabetes, neurodegenerative disorders, and aging. The NRF2-KEAP1 pathway is a pivotal cellular defense mechanism against oxidative stress, regulating the transcription of cytoprotective genes. Pharmacological NRF2 activation has emerged as a promising strategy to mitigate oxidative stress-related pathologies; however, challenges regarding target specificity, pharmacodynamics, efficacy, and safety remain unresolved. Isoeugenol, a phenylpropanoid found in essential oils, has traditionally been recognized as a skin allergen but is now gaining attention for its potential as an NRF2 activator. Emerging evidence suggests that isoeugenol exerts antioxidant, anti-inflammatory, and neuroprotective effects and modulates metabolic disorders such as diabetes mellitus. Despite its therapeutic potential, the direct correlation between isoeugenol's effects and NRF2 activation remains underexplored. Existing studies indicate that isoeugenol may activate NRF2 through multiple mechanisms, including covalent modification of KEAP1 cysteine residues, increased AKT activation and GSK3β inactivation, and glutathione depletion leading to reactive oxygen species (ROS) generation. Understanding these activation pathways is critical for leveraging isoeugenol as a therapeutic agent. This review provides a comprehensive analysis of isoeugenol's role in modulating NRF2 activity and its implications for treating oxidative stress-driven diseases. By integrating current findings, this review highlights new insights into the therapeutic potential of isoeugenol in translational medicine. We propose future research directions to optimize its application in clinical settings, paving the way for more targeted and effective NRF2-based interventions in chronic disease management.
Insights
Isoeugenol shows potential as an NRF2 activator to combat oxidative stress and related chronic diseases. Further research is needed to optimize its therapeutic application for conditions like cancer and diabetes.
Area of Science:
- Biochemistry and Molecular Biology
- Pharmacology and Toxicology
- Cellular Biology
Background:
- Oxidative stress disrupts cellular redox homeostasis, contributing to chronic diseases like cancer, diabetes, and neurodegeneration.
- The NRF2-KEAP1 pathway is a key cellular defense against oxidative stress, regulating cytoprotective genes.
- Pharmacological NRF2 activation is a promising therapeutic strategy, but faces challenges in specificity, efficacy, and safety.
Purpose of the Study:
- To comprehensively analyze isoeugenol's role in modulating NRF2 activity.
- To explore the therapeutic implications of isoeugenol for oxidative stress-driven diseases.
- To highlight new insights into isoeugenol's potential in translational medicine.
Main Methods:
- Review and integration of existing scientific literature on isoeugenol and the NRF2-KEAP1 pathway.
- Analysis of proposed mechanisms for isoeugenol-induced NRF2 activation.
- Evaluation of isoeugenol's antioxidant, anti-inflammatory, and neuroprotective effects.
Main Results:
- Isoeugenol, a phenylpropanoid, is identified as a potential NRF2 activator.
- Evidence suggests isoeugenol may activate NRF2 via KEAP1 modification, AKT/GSK3β signaling, and glutathione depletion.
- Isoeugenol demonstrates antioxidant, anti-inflammatory, neuroprotective, and metabolic regulatory effects.
Conclusions:
- Isoeugenol exhibits therapeutic potential for treating oxidative stress-related pathologies by activating the NRF2 pathway.
- Understanding isoeugenol's NRF2 activation mechanisms is crucial for its development as a therapeutic agent.
- Further research is needed to optimize isoeugenol's clinical application for chronic disease management.
