The role of the Nrf2/Keap1 pathway in obesity and metabolic syndrome

Area of Science:

• Metabolic signaling pathways
• Oxidative stress and redox biology
• Cardiovascular disease prevention

Background:

• Nuclear factor erythroid 2-related factor 2 (Nrf2) is a master regulator of antioxidant and cytoprotective genes.
• Nrf2 signaling is implicated in metabolic syndrome and associated cardiovascular complications.
• Contradictory roles of Nrf2 in insulin sensitivity and resistance have been reported, suggesting a complex regulatory network.

Purpose of the Study:

• To review the latest findings on Nrf2-mediated signaling mechanisms.
• To elucidate the role of Nrf2 in metabolic homeostasis and insulin sensitivity.
• To explore the impact of redox balance on Nrf2's function in metabolic pathways.

Main Methods:

• Literature review of recent studies on Nrf2 signaling.
• Analysis of experimental data linking Nrf2 to insulin resistance, adipogenesis, and oxidative stress.
• Synthesis of evidence regarding the dual role of Nrf2 in metabolic regulation.

Main Results:

• Nrf2 deficiency can ameliorate insulin resistance and adipogenesis.
• Nrf2 overexpression can exacerbate insulin resistance under specific conditions.
• Redox homeostasis critically influences Nrf2's effects on insulin signaling, with reactive oxygen species having context-dependent roles.

Conclusions:

• Nrf2's impact on insulin sensitivity is complex and depends on cellular context and redox status.
• Understanding Nrf2's regulation of redox balance is key to resolving its contradictory effects on metabolic health.
• Further research into Nrf2-mediated signaling is crucial for developing therapeutic strategies for metabolic disorders.