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Bioactive Compounds in Oxidative Stress-Mediated Diseases: Targeting the NRF2/ARE Signaling Pathway and Epigenetic
Muthu Thiruvengadam1, Baskar Venkidasamy2, Umadevi Subramanian3
1Department of Crop Science, College of Sanghuh Life Science, Konkuk University, Seoul 05029, Korea.
Abstract:
Oxidative stress is a pathological condition occurring due to an imbalance between the oxidants and antioxidant defense systems in the body. Nuclear factor E2-related factor 2 (NRF2), encoded by the gene NFE2L2, is the master regulator of phase II antioxidant enzymes that protect against oxidative stress and inflammation. NRF2/ARE signaling has been considered as a promising target against oxidative stress-mediated diseases like diabetes, fibrosis, neurotoxicity, and cancer. The consumption of dietary phytochemicals acts as an effective modulator of NRF2/ARE in various acute and chronic diseases. In the present review, we discussed the role of NRF2 in diabetes, Alzheimer's disease (AD), Parkinson's disease (PD), cancer, and atherosclerosis. Additionally, we discussed the phytochemicals like curcumin, quercetin, resveratrol, epigallocatechin gallate, apigenin, sulforaphane, and ursolic acid that have effectively modified NRF2 signaling and prevented various diseases in both in vitro and in vivo models. Based on the literature, it is clear that dietary phytochemicals can prevent diseases by (1) blocking oxidative stress-inhibiting inflammatory mediators through inhibiting Keap1 or activating Nrf2 expression and its downstream targets in the nucleus, including HO-1, SOD, and CAT; (2) regulating NRF2 signaling by various kinases like GSK3beta, PI3/AKT, and MAPK; and (3) modifying epigenetic modulation, such as methylation, at the NRF2 promoter region; however, further investigation into other upstream signaling molecules like NRF2 and the effect of phytochemicals on them still need to be investigated in the near future.
Insights
Dietary phytochemicals modulate the NRF2 pathway, offering protection against oxidative stress and related diseases like diabetes and cancer. These compounds activate antioxidant defenses by influencing NRF2 signaling and epigenetic modifications.
Area of Science:
- Biochemistry
- Molecular Biology
- Nutrition Science
Background:
- Oxidative stress, an imbalance between oxidants and antioxidants, underlies various diseases.
- Nuclear factor E2-related factor 2 (NRF2) is a key regulator of antioxidant and anti-inflammatory responses.
- NRF2/ARE signaling is a crucial target for treating diseases linked to oxidative stress.
Purpose of the Study:
- To review the role of NRF2 in major diseases including diabetes, Alzheimer's, Parkinson's, cancer, and atherosclerosis.
- To explore the potential of dietary phytochemicals in modulating NRF2 signaling for disease prevention.
- To summarize the mechanisms by which phytochemicals influence NRF2 activity and downstream effects.
Main Methods:
- Literature review of studies investigating NRF2 signaling in disease pathogenesis.
- Analysis of research on dietary phytochemicals (e.g., curcumin, resveratrol) and their effects on NRF2.
- Examination of in vitro and in vivo models demonstrating NRF2 modulation by phytochemicals.
Main Results:
- NRF2 plays a significant role in diabetes, Alzheimer's disease, Parkinson's disease, cancer, and atherosclerosis.
- Dietary phytochemicals like curcumin, quercetin, and sulforaphane effectively modulate NRF2/ARE signaling.
- Phytochemicals prevent diseases by inhibiting oxidative stress and inflammation via NRF2 activation and epigenetic changes.
Conclusions:
- Dietary phytochemicals are potent modulators of NRF2 signaling, offering a promising therapeutic strategy.
- Targeting NRF2 with phytochemicals can combat oxidative stress-related diseases.
- Further research is needed to fully elucidate the upstream regulation of NRF2 and phytochemical interactions.
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