Oxidative Stress Mechanisms in Heart Failure

Oxidative stress arises when the generation of reactive oxygen species (ROS) outpaces endogenous antioxidant defences. In heart failure, multiple insults—such as ischaemia–reperfusion injury, chronic pressure overload and neurohormonal activation—drive excessive ROS production via mitochondrial respiratory chain leakage, NADPH oxidase stimulation and uncoupled nitric oxide synthase. Persistent oxidative damage to lipids, proteins and DNA triggers maladaptive ventricular remodelling through matrix metalloproteinase activation, inflammatory cascades and interstitial fibrosis. Concurrently, redox‐sensitive calcium‐handling proteins undergo post‐translational modifications, undermining excitation–contraction coupling and energy production. Cardiomyocyte loss by apoptosis and necrosis further impairs contractile reserve. Beyond the myocardium, systemic oxidative alterations in circulating blood cells reflect disease severity and exercise intolerance, underscoring heart failure as a multi‐organ syndrome. Insights into these pathways have informed the search for real‐time biomarkers and redox‐targeted therapies to arrest progression and improve patient outcomes.

Research from Nature Portfolio

Recent studies have demonstrated that mitochondrial respiratory dysfunction in peripheral blood mononuclear cells correlates with early cardiac hypertrophy and asymptomatic ventricular impairment. Detailed analysis of mitochondrial respiratory parameters revealed that reduced electron transport capacity is associated with pro-inflammatory markers and diminished antioxidant defences in individuals at risk of heart failure. In parallel, investigations into mitochondrial ROS generation in circulating blood cells have shown that elevated ROS levels track with clinical indices of heart failure severity, including natriuretic peptide concentrations and peak oxygen uptake. These findings establish circulating blood-cell mitochondrial function as both a window into systemic redox status and a potential target for novel therapeutic strategies.

Oxidative Stress Mechanisms in Heart Failure publication trend

The graph below shows the total number of articles in oxidative stress mechanisms in heart failure across all publications each year (not limited to Nature Index journals).

Technical terms

Reactive oxygen species (ROS): Partially reduced oxygen metabolites (eg, superoxide, hydrogen peroxide) that can oxidise cellular components.

Oxidative stress: Imbalance between ROS production and antioxidant capacity, leading to molecular damage and dysfunction.

Mitochondrial respiration: Process by which mitochondria generate ATP via electron transfer along respiratory complexes; dysfunction increases ROS leakage.

NADPH oxidase: Enzyme complex that transfers electrons from NADPH to oxygen, forming superoxide as part of cellular signalling or defence.

Antioxidant enzymes: Proteins (eg, superoxide dismutase, peroxiredoxins) that catalyse removal or conversion of ROS to minimise oxidative damage.

References

1. Peroxiredoxin‐4, a marker of systemic oxidative stress, is associated with incident heart failure. European Journal of Heart Failure (2025).
2. Mitochondrial respiratory dysfunctions of blood mononuclear cells link with cardiac disturbance in patients with early-stage heart failure. Scientific Reports (2015).
3. Mitochondrial reactive oxygen species generation in blood cells is associated with disease severity and exercise intolerance in heart failure patients. Scientific Reports (2019).
4. Oxidative Stress as a Therapeutic Target of Cardiac Remodeling. Antioxidants (2022).
5. Novel Oxidative Stress Biomarkers with Risk Prognosis Values in Heart Failure. Biomedicines (2023).