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NADPH Oxidases in Chronic Liver Diseases
Joy X Jiang1, Natalie J Török1
1Department of Internal Medicine, Division of Gastroenterology and Hepatology, UC Davis Medical Center, 4150 V Street, Sacramento, CA 95817, USA.
Advances in Hepatology
|October 6, 2015
Summary
Oxidative stress in chronic liver diseases involves nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs). This review explores NOX pathways, distribution, and roles in liver disease redox signaling.
Area of Science:
- Hepatology
- Molecular Biology
- Biochemistry
Background:
- Oxidative stress is a hallmark of chronic liver diseases like viral hepatitis, alcoholic, and nonalcoholic steatohepatitis.
- Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs) are key sources of reactive oxygen species (ROS) in the liver.
- NOX isoforms (NOX1, NOX2, NOX4) play distinct roles in liver inflammation, injury, and repair.
Purpose of the Study:
- To review current knowledge on NOX enzymes in liver diseases.
- To summarize NOX activation pathways and cellular distribution in the liver.
- To elucidate the role of NOXs in modulating redox signaling in hepatic pathologies.
Main Methods:
- Literature review of studies on NOX enzymes in liver disease.
- Analysis of research on NOX isoform function and regulation.
- Synthesis of data on redox signaling pathways involving NOXs.
Main Results:
- NOX enzymes, particularly NOX1, NOX2, and NOX4, are significantly implicated in liver oxidative stress.
- NOX2 is crucial for Kupffer cell and neutrophil functions in inflammation.
- Nonphagocytic NOX homologues are increasingly recognized for their roles in oxidative injury and wound healing.
Conclusions:
- NOX enzymes are critical mediators of oxidative stress and redox signaling in chronic liver diseases.
- Understanding NOX regulation and function is vital for developing therapeutic strategies.
- Targeting NOX pathways may offer novel approaches for treating liver diseases.
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