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Perspectives on the Clinical Development of NRF2-Targeting Drugs
Diego Lastra1,2,3, Raquel Fernández-Ginés1,2,3, Gina Manda4
1Instituto de Investigaciones Biomédicas "Alberto Sols" UAM-CSIC, Instituto de Investigación Sanitaria La Paz (IdiPaz), Madrid, Spain.
Abstract:
The transcription factor NRF2 (nuclear factor erythroid 2-related factor 2) triggers homeostatic responses against a plethora of environmental or endogenous deviations in redox metabolism, inflammation, proteostasis, etc. Therefore, pharmacological activation of NRF2 is a promising therapeutic strategy for several chronic diseases that are underlined by low-grade oxidative inflammation and dysregulation of redox metabolism, such as neurodegenerative, cardiovascular, and metabolic diseases. While NRF2 activation is useful in inhibiting carcinogenesis, its inhibition is needed in constituted tumors where NRF2 provides a survival advantage in the challenging tumor niche. This review describes the electrophilic and non-electrophilic NRF2 activators with clinical projection in various chronic diseases. We also analyze the status of NRF2 inhibitors, which are for the moment in a proof-of-concept stage. Advanced in silico screening and medicinal chemistry are expected to provide new or repurposing small molecules with increased potential for fostering the development of targeted NRF2 modulators. The nuclear factor erythroid 2 (NFE2)-related factor 2 (NRF2) is rapidly degraded by proteasomes under a basal condition in a Keap1-dependent manner. ROS oxidatively modifies Keap1 to release NRF2 and allow its nuclear translocation. Here it binds to the antioxidant response element to regulate gene transcription. An alternative mechanism controlling NRF2 stability is glycogen synthase kinase 3 (GSK-3)-induced phosphorylation. Indicated in blue are NRF2-activating and NRF2-inhibiting drugs.
Insights
Nuclear factor erythroid 2-related factor 2 (NRF2) activation offers therapeutic potential for chronic diseases by managing redox balance. However, NRF2 inhibition is crucial for treating established cancers where it promotes tumor survival.
Area of Science:
- Biochemistry
- Molecular Biology
- Pharmacology
Background:
- Nuclear factor erythroid 2-related factor 2 (NRF2) is a transcription factor regulating cellular responses to oxidative stress and inflammation.
- Dysregulation of NRF2 is implicated in chronic diseases like neurodegenerative, cardiovascular, and metabolic disorders.
- NRF2 activation can inhibit carcinogenesis, but its role in established tumors necessitates targeted inhibition.
Purpose of the Study:
- To review electrophilic and non-electrophilic NRF2 activators for chronic diseases.
- To analyze the current status of NRF2 inhibitors in preclinical development.
- To explore the potential of in silico screening and medicinal chemistry for developing novel NRF2 modulators.
Main Methods:
- Literature review of NRF2 activators and inhibitors.
- Analysis of NRF2 regulation mechanisms, including Keap1-dependent degradation and GSK-3 phosphorylation.
- Discussion of clinical projections and proof-of-concept studies for NRF2 modulators.
Main Results:
- NRF2 activators show promise for treating chronic inflammatory and metabolic diseases.
- NRF2 inhibitors are in early stages of development but are essential for targeting tumors.
- Small molecules for targeted NRF2 modulation are anticipated through advanced computational and chemical approaches.
Conclusions:
- Targeted modulation of NRF2, either activation or inhibition, presents a significant therapeutic strategy for a range of diseases.
- Further research in medicinal chemistry and in silico screening is vital for advancing NRF2-targeted therapies.
- Understanding NRF2's dual role in disease prevention and tumor promotion is key to its clinical application.
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