Chronic Infections Accelerate Heart Aging Through Inflammaging Pathways
New research reveals how persistent pathogens mimic biological aging in the heart, offering a fresh target for cardiovascular longevity strategies.
Resumen
A comprehensive review published in Cell Physiology and Biochemistry argues that chronic infections — from viruses, bacteria, and parasites — act as accelerators of cardiac aging. By establishing persistent low-grade inflammation (inflammaging), these pathogens trigger cardiomyocyte senescence, mitochondrial dysfunction, and oxidative stress. They also dysregulate mTOR signaling and impair autophagy, mirroring natural aging processes in the heart. Structurally, immune subversion leads to macrophage polarization, autoimmunity, ventricular hypertrophy, and myocardial fibrosis. The authors propose that treating chronic infection as a modifiable aging driver could reshape cardiovascular and geriatric care by prioritizing anti-infective interventions.
Resumen detallado
Cardiovascular disease remains the world's leading cause of death, and age is its strongest risk factor. But what if infections — not just time — are quietly aging your heart? A 2026 review in Cell Physiology and Biochemistry makes exactly that case, framing chronic infection as an underappreciated and potentially modifiable driver of cardiac biological aging.
The authors examine how pathogens that evade immune clearance — including viruses, bacteria, and parasites — establish a state of chronic, low-grade inflammation known as inflammaging. This persistent cytokine signaling and leukocyte infiltration closely mirrors the sterile inflammation seen in natural cardiac senescence, suggesting these two processes may converge on the same destructive pathways.
At the molecular level, chronic infection disrupts the heart's core homeostatic machinery. mTOR signaling becomes dysregulated and autophagy — the cell's cleanup system — is impaired, accelerating cardiomyocyte senescence. Simultaneously, mitochondrial dysfunction escalates reactive oxygen species (ROS) production, causing oxidative DNA damage and metabolic exhaustion in heart muscle cells.
Structurally, the consequences are significant. Immune subversion through macrophage polarization and pathogen-induced autoimmunity drives left ventricular hypertrophy, adverse myocardial remodeling, and interstitial fibrosis — hallmarks of age-related heart failure. The review coins the umbrella concept of 'pathogen-associated cardiomyopathy' to capture this spectrum of damage.
The key implication is clinical and actionable: if chronic infection accelerates cardiac aging, then anti-infective strategies — antivirals, antibiotics, antiparasitics, and vaccines — deserve a prominent place in cardiovascular longevity and geriatric medicine. Caveats include the review's reliance on existing literature without new primary data, and the complexity of establishing causality versus correlation in human populations.
Hallazgos clave
- Chronic infections establish persistent inflammaging that directly mirrors sterile cardiac aging phenotypes.
- Pathogens dysregulate mTOR signaling and impair autophagy, triggering premature cardiomyocyte senescence.
- Mitochondrial dysfunction and excess ROS from chronic infection cause oxidative DNA damage in the myocardium.
- Immune subversion via macrophage polarization accelerates ventricular hypertrophy and myocardial fibrosis.
- Anti-infective treatments are proposed as modifiable longevity interventions for cardiovascular health.
Metodología
This is a narrative review synthesizing existing preclinical and clinical literature on the intersection of chronic infection and cardiac aging. No original experimental data were generated. The authors draw from virology, microbiology, cardiology, and geroscience literature to construct a unified mechanistic framework.
Limitaciones del estudio
As a review paper, the study cannot establish causality between chronic infection and cardiac aging in individual patients. The heterogeneity of pathogens discussed (viruses, bacteria, parasites) makes it difficult to generalize mechanistic findings across infection types. Human longitudinal data directly linking pathogen burden to cardiac aging biomarkers remain limited, and much supporting evidence is preclinical.
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