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Combating oxidative stress in diabetic complications with Nrf2 activators: how much is too much?
Abstract:
Diabetes is increasing at an alarming rate and, despite anti-hypertensive and insulin therapies, diabetic patients are still at risk of developing complications such as chronic kidney disease, cardiovascular disease, and retinopathy. There is therefore an urgent need for more effective therapies to prevent the development and progression of diabetic complications. Oxidative stress is a major player in the aetiology of diabetic complications. However, results from clinical trials thus far using general antioxidants have been disappointing. Mechanism-based antioxidants have gained considerable attention due to their more targeted approach at reducing oxidative stress and associated complications in diabetes. The transcription factor, NFE2-related factor 2 (Nrf2), is a master regulator of redox homeostasis and the cellular detoxification response. Instead of relying on a single antioxidant, activation of Nrf2 results in the concerted upregulation of several antioxidant enzymes and cytoprotective genes, making it an attractive therapeutic target for diabetic complications. Several Nrf2 activators have been discovered and have proven effective at activating Nrf2 signalling through different mechanisms in both in vitro and in vivo models of diabetes. This review will address some of the most promising and well-known Nrf2 activators and their roles in preventing the development and progression of diabetic complications. Challenges facing the advancement of this drug class into the clinic will be discussed, as will be the future of Nrf2 activation as a therapeutic strategy in preventing the development of diabetic complications.
Insights
Targeting oxidative stress with Nrf2 activators offers a promising therapeutic strategy for preventing diabetic complications. This approach enhances the body's natural antioxidant defenses, addressing limitations of general antioxidants.
Area of Science:
- Endocrinology and Metabolism
- Molecular Biology
- Pharmacology
Background:
- Diabetes mellitus is a growing global health concern, with significant morbidity from complications like chronic kidney disease, cardiovascular disease, and retinopathy.
- Current treatments, including anti-hypertensives and insulin, are insufficient to prevent these severe diabetic complications.
- Oxidative stress is a key factor in the development of diabetic complications, but broad-spectrum antioxidants have shown limited clinical efficacy.
Purpose of the Study:
- To review the therapeutic potential of Nrf2 (NFE2-related factor 2) activators in preventing and managing diabetic complications.
- To discuss the mechanisms of action of various Nrf2 activators and their effectiveness in preclinical diabetes models.
- To explore the challenges and future prospects of Nrf2 activation as a clinical strategy for diabetic complications.
Main Methods:
- Literature review of studies investigating Nrf2 activators in the context of diabetes.
- Analysis of in vitro and in vivo data demonstrating the efficacy of Nrf2 activation.
- Examination of the role of Nrf2 as a master regulator of cellular redox homeostasis and detoxification pathways.
Main Results:
- Nrf2 activation upregulates multiple antioxidant and cytoprotective genes, offering a more targeted approach than single antioxidants.
- Several Nrf2 activators have demonstrated efficacy in preclinical models, showing potential to mitigate diabetic complications.
- Mechanism-based Nrf2 activators represent a promising therapeutic avenue due to their comprehensive cellular protection.
Conclusions:
- Nrf2 activation is a highly attractive therapeutic target for combating diabetic complications by bolstering endogenous antioxidant defenses.
- Further research and clinical trials are necessary to overcome challenges and advance Nrf2 activators into mainstream diabetes therapy.
- Nrf2-targeted therapies hold significant promise for improving long-term outcomes in diabetic patients.
