Reactive oxygen species and antioxidant defense in human gastrointestinal diseases

Area of Science:

• Gastroenterology and Immunology
• Biochemistry and Molecular Biology

Background:

• Inflammatory bowel diseases (IBDs), including Crohn's disease and ulcerative colitis, and celiac disease are prevalent in both children and adults.
• Oxidative stress, driven by reactive oxygen species (ROS), is a potential contributing factor to the etiology of IBDs and celiac disease.
• Cellular damage from ROS occurs through oxidation of vital components like DNA, proteins, and lipids.

Purpose of the Study:

• To highlight the association between oxidative stress and IBDs/celiac disease.
• To emphasize the scarcity of research on free radical effects and antioxidant status, particularly in pediatric populations.
• To underscore the necessity for further studies on ROS and antioxidant activity in affected children.

Main Methods:

• Review of existing literature on oxidative stress and antioxidant defense mechanisms.
• Discussion of enzymatic (superoxide dismutase, glutathione peroxidase, glutathione reductase) and nonenzymatic antioxidant pathways.
• Identification of knowledge gaps in pediatric research.

Main Results:

• ROS, including superoxide radicals, hydroxyl radicals, hydrogen peroxide, and singlet oxygen, can cause cellular damage.
• Antioxidant defense systems, such as the glutathione redox cycle, exist to mitigate ROS toxicity.
• Current research on oxidative stress and antioxidant status in pediatric IBD and celiac disease patients is limited.

Conclusions:

• Oxidative stress is a significant factor in IBDs and celiac disease.
• Understanding antioxidant mechanisms is crucial for managing these conditions.
• More research is critically needed to investigate ROS and antioxidant status in children with IBDs and celiac disease to inform clinical practice.