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Roles of Nrf2 in Liver Diseases: Molecular, Pharmacological, and Epigenetic Aspects
Marina Galicia-Moreno1, Silvia Lucano-Landeros1, Hugo Christian Monroy-Ramirez1
1Instituto de Biologia Molecular en Medicina, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara 44340, Jalisco, Mexico.
Abstract:
Liver diseases represent a critical health problem with 2 million deaths worldwide per year, mainly due to cirrhosis and its complications. Oxidative stress plays an important role in the development of liver diseases. In order to maintain an adequate homeostasis, there must be a balance between free radicals and antioxidant mediators. Nuclear factor erythroid 2-related factor (Nrf2) and its negative regulator Kelch-like ECH-associated protein 1 (Keap1) comprise a defense mechanism against oxidative stress damage, and growing evidence considers this signaling pathway as a key pharmacological target for the treatment of liver diseases. In this review, we provide detailed and updated evidence regarding Nrf2 and its involvement in the development of the main liver diseases such as alcoholic liver damage, viral hepatitis, steatosis, steatohepatitis, cholestatic damage, and liver cancer. The molecular and cellular mechanisms of Nrf2 cellular signaling are elaborated, along with key and relevant antioxidant drugs, and mechanisms on how Keap1/Nrf2 modulation can positively affect the therapeutic response are described. Finally, exciting recent findings about epigenetic modifications and their link with regulation of Keap1/Nrf2 signaling are outlined.
Insights
The Nuclear factor erythroid 2-related factor (Nrf2) pathway is crucial for combating oxidative stress in liver diseases. Targeting this pathway offers a promising therapeutic strategy for various liver conditions.
Area of Science:
- Hepatology
- Molecular Biology
- Pharmacology
Background:
- Liver diseases cause 2 million deaths annually, with oxidative stress as a key factor.
- The Nuclear factor erythroid 2-related factor (Nrf2) and Kelch-like ECH-associated protein 1 (Keap1) pathway is a critical defense against oxidative damage.
- This pathway is increasingly recognized as a significant therapeutic target for liver disease treatment.
Purpose of the Study:
- To review the role of the Nrf2 pathway in major liver diseases.
- To elaborate on the molecular mechanisms of Nrf2 signaling and its regulation by Keap1.
- To discuss antioxidant drugs and epigenetic modifications influencing the Keap1/Nrf2 pathway.
Main Methods:
- Comprehensive literature review of Nrf2 signaling in liver diseases.
- Analysis of molecular and cellular mechanisms.
- Examination of therapeutic interventions targeting the Keap1/Nrf2 pathway.
Main Results:
- Nrf2 plays a significant role in alcoholic liver damage, viral hepatitis, steatosis, steatohepatitis, cholestatic damage, and liver cancer.
- Modulation of the Keap1/Nrf2 pathway demonstrates potential for positive therapeutic effects.
- Epigenetic modifications are emerging as key regulators of Keap1/Nrf2 signaling.
Conclusions:
- The Keap1/Nrf2 pathway is a vital component of cellular defense against oxidative stress in the liver.
- Targeting the Keap1/Nrf2 pathway presents a promising therapeutic avenue for managing diverse liver diseases.
- Further research into epigenetic regulation of this pathway may unlock novel treatment strategies.
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