Modulatory Impact of Oxidative Stress on Action Potentials in Pathophysiological States: A Comprehensive Review

Area of Science:

• Physiology
• Cell Biology
• Pathophysiology

Background:

• Oxidative stress, an imbalance of reactive oxygen species (ROS) and antioxidant defenses, impairs cellular function.
• Action potentials (APs) are critical for excitable cells, including neurons and myocytes.
• Dysfunctional APs are implicated in neurodegenerative diseases, cardiac arrhythmias, and ischemia-reperfusion injuries.

Purpose of the Study:

• To review the mechanisms by which oxidative stress impacts action potentials (APs).
• To explore the role of oxidative stress in the pathophysiology of diseases involving excitable cells.
• To discuss potential therapeutic strategies targeting the oxidative stress-AP interaction.

Main Methods:

• Literature review integrating current research on oxidative stress and cellular electrophysiology.
• Focus on alterations in ion channel biophysics, gap junctions, calcium dynamics, mitochondria, and Interstitial Cells of Cajal.
• Analysis of how these changes affect APs in various cell types.

Main Results:

• Oxidative stress significantly alters ion channel function, affecting AP generation and propagation.
• Mitochondrial dysfunction and altered calcium dynamics contribute to AP abnormalities under oxidative stress.
• Changes in gap junction communication and Interstitial Cells of Cajal function further modulate cellular excitability.

Conclusions:

• Oxidative stress profoundly influences AP dynamics through multiple cellular pathways.
• This interaction is a critical factor in the progression of various diseases.
• Targeting the interplay between oxidative stress and APs offers promising therapeutic avenues.