Inflammation and endothelial dysfunction during aging: role of NF-kappaB

Area of Science:

• Cardiovascular Research
• Aging Biology
• Immunology

Background:

• Age-associated cardiovascular diseases are increasingly linked to oxidative stress.
• Vascular inflammation can occur independently of traditional atherogenesis risk factors.

Purpose of the Study:

• To review experimental data on the mechanisms of age-related vascular inflammation.
• To explore the role of oxidative stress and inflammatory pathways in endothelial activation in aged arteries.

Main Methods:

• Review of recent experimental data.
• Analysis of pathways involving mitochondrial reactive oxygen species, innate immunity, TACE-TNF-alpha, and the renin-angiotensin system.
• Examination of NF-kappaB regulation by nuclear factors like PARP-1 and SIRT-1.

Main Results:

• Mitochondrial reactive oxygen species, innate immunity, TACE-TNF-alpha, and the renin-angiotensin system contribute to NF-kappaB induction and endothelial activation in aged arteries.
• Multiple pro-inflammatory pathways converge on NF-kappaB in the aged arterial wall.
• NF-kappaB transcriptional activity is modulated by aging-related nuclear factors, including PARP-1 and SIRT-1.

Conclusions:

• Oxidative stress is a significant driver of vascular inflammation in aging.
• NF-kappaB serves as a central convergence point for pro-inflammatory signaling in aged arteries.
• Nuclear factors like PARP-1, SIRT-1, and potentially nucleophosmin (NPM) regulate NF-kappaB activity during aging.