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Related Concept Videos

Aging01:26

Aging

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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Related Experiment Video

Updated: Apr 16, 2026

A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence
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Senescence-Induced Oxidative Stress Causes Endothelial Dysfunction.

Raj Bhayadia1, Bernhard M W Schmidt2, Anette Melk1

  • 1Department of Pediatric Nephrology, Hepatology and Metabolic Diseases, Children's Hospital, Hannover Medical School, Hannover D-30625, Germany. REBIRTH Excellence Cluster, Hannover Medical School, Hannover D-30625, Germany.

The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
|March 5, 2015
PubMed
Summary
This summary is machine-generated.

Aging and cellular senescence contribute to cardiovascular disease by impairing blood vessel function. Antioxidants can restore this function, suggesting new therapeutic targets for age-related vascular damage.

Keywords:
Biology of AgingCardiovascular DiseaseCellular SenescenceEndothelialMice

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Area of Science:

  • Cardiovascular Science
  • Aging Research
  • Cellular Biology

Background:

  • Aging is a primary risk factor for cardiovascular disease (CVD).
  • Endothelial dysfunction, characterized by impaired vasodilation, is an early indicator of CVD.
  • Cellular senescence, the biological aging of cells, is implicated in endothelial dysfunction, but direct causal evidence is lacking.

Purpose of the Study:

  • To investigate the causal role of aging and cellular senescence in endothelial dysfunction.
  • To determine if oxidative stress mediates age-related endothelial dysfunction.
  • To explore the potential of antioxidant therapies for age-related vascular impairment.

Main Methods:

  • Assessed endothelium-dependent vasodilation in aortic rings from aged (24-28 months) and young (4-6 months) wildtype mice.
  • Examined aortas from telomerase-deficient (Terc(-/-)) mice (Generation 3) to model telomere shortening.
  • Administered a combination of TEMPOL (superoxide dismutase mimetic) and apocynin (NADPH oxidase inhibitor) to assess functional recovery.

Main Results:

  • Aged wildtype and Terc(-/-) mice exhibited impaired endothelium-dependent vasodilation compared to young controls.
  • Treatment with TEMPOL and apocynin significantly improved vasodilation in aged and Terc(-/-) mice.
  • These findings indicate that aging and senescence-induced endothelial dysfunction are linked to oxidative stress.

Conclusions:

  • Cellular senescence directly contributes to endothelial dysfunction, a key factor in cardiovascular disease.
  • Oxidative stress plays a critical role in age-related endothelial dysfunction.
  • Antioxidant interventions show promise for preventing or treating age-associated vascular damage and CVD.