ROS and RNS signaling in heart disorders: could antioxidant treatment be successful?

Area of Science:

• Cardiology
• Biochemistry
• Pathophysiology

Background:

• Antioxidant treatments for heart disease have limited success.
• Reactive oxygen species (ROS) and reactive nitrogen species (RNS) are increasingly recognized for their complex signaling roles in cardiovascular pathology.
• Physiological free radicals like superoxide and nitric oxide, and their derivatives, are implicated in heart disorders.

Purpose of the Study:

• To examine the damaging signaling roles of ROS and RNS in various heart and vascular disorders.
• To investigate the link between ROS overproduction (oxidative stress) and the disruption of normal physiological signaling.
• To explore the potential of antioxidants and enzyme/gene inhibitors in managing detrimental ROS signaling.

Main Methods:

• Review of existing literature on ROS/RNS signaling in cardiovascular diseases.
• Analysis of the mechanisms by which oxidative stress transforms physiological signaling into damaging pathways.
• Discussion of preconditioning effects of low/moderate oxidative stress.

Main Results:

• ROS overproduction, or oxidative stress, is a primary driver of pathological signaling in heart conditions.
• ROS and RNS signaling significantly contributes to heart failure (CHF), left ventricular hypertrophy (LVH), coronary heart disease, and arrhythmias.
• Low to moderate oxidative stress can exert favorable effects through preconditioning mechanisms, particularly in ischemia/reperfusion scenarios.

Conclusions:

• Understanding the dual role of ROS/RNS signaling is crucial for developing effective cardiovascular therapies.
• Targeting damaging ROS signaling pathways with antioxidants or inhibitors may offer therapeutic benefits for heart disorders.
• Further research into ROS/RNS modulation holds promise for improving cardiovascular health.