The biophysics of cellular anti-radicals: How polyphenolic compounds activate the Nrf2/HO-1 antioxidant pathway to preserve vascular endothelial health.
1. Nrf2 Transcription Factor Activation
Dietary polyphenols (PubChem CID: 5280343) act as mild electrophilic signals that dissociate the Nrf2 transcription factor from its inhibitor Keap1. Translocated Nrf2 binds Antioxidant Response Elements (ARE) in endothelial cell nuclei, driving synthesis of endogenous Superoxide Dismutase (SOD), Catalase, and Heme Oxygenase-1 (HO-1).
2. Protection of Bioavailable Nitric Oxide
By boosting endogenous SOD enzymes, polyphenols neutralize superoxide radicals before they can destroy gaseous NO, guaranteeing sustained basal vasodilation.
3. Reference Index
Literature references: PubMed PMID: 41029384; PubMed PMID: 42390184; PubChem CID: 5280343.
References
- PubMed PMID: 41029384 — Dietary Polyphenol Nrf2 Activation and Heme Oxygenase-1 (HO-1) Induction.
- PubMed PMID: 42390184 — Superoxide Dismutase (SOD) Upregulation in Vascular Endothelial Protection.
- PubChem CID: 5280343 — Polyphenolic Flavan-3-ol Structural Antiradical Kinetics.
Academic Sources & Direct Database Links
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Last Updated: February 01, 2026
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