Pediatric Multisystem Syndrome Associated with SARS-CoV-2 (MIS-C): The Interplay of Oxidative Stress and Inflammation

Area of Science:

• Pediatric inflammatory multisystem syndrome temporally associated with SARS-CoV-2 (MIS-C)
• Oxidative stress and inflammation in pediatric diseases

Background:

• Pediatric inflammatory multisystem syndrome (MIS-C) presents with persistent fever, organ dysfunction, and inflammatory markers.
• The precise pathophysiological mechanisms underlying MIS-C remain largely unknown.
• Proinflammatory mediators, reactive oxygen species, and impaired antioxidant defenses are implicated in MIS-C pathogenesis.

Purpose of the Study:

• To review current evidence on the role of oxidative stress in MIS-C.
• To explore the relationship between inflammatory mediators and oxidative stress in children with MIS-C.
• To highlight the potential of antioxidant strategies for MIS-C prevention and treatment.

Main Methods:

• Literature review of recent studies on MIS-C and oxidative stress.
• Analysis of the interplay between SARS-CoV-2 infection, inflammation, and oxidative stress pathways.
• Examination of the role of NOX enzymes and Nrf-2 in MIS-C pathophysiology.

Main Results:

• Oxidative stress, characterized by increased reactive oxygen species and reduced antioxidant capacity, appears central to MIS-C.
• SARS-CoV-2 infection may activate NOX enzymes and suppress the Nrf-2 antioxidant response, leading to free radical damage.
• Nonphagocytic NOX enzymes have diverse roles, including epithelial defense and cell signaling, which may be dysregulated in MIS-C.

Conclusions:

• The link between inflammation and oxidative stress is critical for understanding MIS-C.
• Evaluating oxidative stress alongside inflammatory markers is essential for comprehending MIS-C mechanisms.
• Antioxidant interventions hold promise for preventing long-term morbidity in children affected by MIS-C.