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The Nrf2-Keap1-ARE signaling pathway: The regulation and dual function of Nrf2 in cancer
Abstract:
The NF-E2-related factor-2 (Nrf2) is a transcription factor that is ubiquitously expressed at low levels in all human organs. As Nrf2 regulates a major cellular defense mechanism, tight regulation is crucial to maintain cellular homeostasis. Activation of this pathway is important in preventing human diseases, such as cancer, neurodegenerative disease, cardiovascular diseases, ischemia, diabetes, pulmonary fibrosis, and inflammatory diseases. Conversely, high constitutive levels of Nrf2 occur in many tumors or cancer cell lines. Moreover, overexpression of Nrf2 in cancer cells protects them from the cytotoxic effects of anticancer therapies, resulting in chemo- and/or radioresistance. Therefore, understanding Nrf2 regulation and identifying Nrf2 activators or inhibitors for disease prevention or as sensitizing agents during cancer therapy, respectively, will have a significant impact on human health. The growing interest in Nrf2 is reflected by an exponentially increasing number of annual publications on this topic. The present forum provides a comprehensive review on research conducted since the initial discovery of the Nrf2-Keap1 pathway in 1999, provides readers with insight into contemporary research in this field, and assesses current known biological functions of this pathway. Additionally, the forum will serve as an important resource for both graduate students and active researchers who are interested in the Nrf2 field.
Insights
The transcription factor Nrf2 (NF-E2-related factor-2) is crucial for cellular defense and preventing diseases. However, its role in cancer is complex, as elevated Nrf2 can promote tumor growth and treatment resistance.
Area of Science:
- Molecular Biology
- Cellular Biology
- Biochemistry
Background:
- The NF-E2-related factor-2 (Nrf2) pathway is a critical cellular defense mechanism essential for maintaining homeostasis.
- Dysregulation of Nrf2 is implicated in various human diseases, including cancer, neurodegenerative disorders, and cardiovascular conditions.
Discussion:
- While Nrf2 activation is protective against certain diseases, its overexpression in cancer cells confers resistance to chemotherapy and radiotherapy.
- Understanding the dual role of Nrf2 in health and disease is vital for developing targeted therapeutic strategies.
Key Insights:
- Nrf2 regulates a major cellular defense system, with tight control being essential for cellular balance.
- The Nrf2-Keap1 pathway's discovery in 1999 has spurred significant research into its biological functions.
- Identifying Nrf2 modulators offers potential for disease prevention and enhancing cancer treatment efficacy.
Outlook:
- Further research into Nrf2 regulation is crucial for its therapeutic applications in disease prevention and cancer therapy.
- This review provides a comprehensive overview of Nrf2 research, serving as a valuable resource for scientists and students.
- Continued investigation into the Nrf2-Keap1 pathway will illuminate new avenues for human health interventions.
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