# NAD+ Deficiency and Its Role in Calcific Aortic Valve Disease Linked to Aging

Canonical source: https://retacompare.com/research/nad-deficiency-and-its-role-in-calcific-aortic-valve-disease-linked-to-aging

NAD+ Metabolism · 2026-03-17


    NAD+ deficiency plays a critical role in the development of calcific aortic valve disease, particularly in aging populations. Calcific aortic valve disease (CAVD) is a condition characterized by the progressive calcification of the aortic valve, leading to serious cardiovascular complications. This disease is closely associated with aging, and recent research has highlighted the importance of nicotinamide adenine dinucleotide (NAD+) and its metabolic pathways in the disease's progression.

 What this study examined

This study investigated the impact of NAD+ metabolism on calcific aortic valve disease by employing a combination of human aortic valve bulk RNA sequencing and single-cell transcriptomics. Researchers focused on the enzyme nicotinamide phosphoribosyltransferase (NAMPT), which is crucial for NAD+ salvage metabolism. The study utilized various mouse models, including heterozygous, endothelial-specific, and myeloid-specific Nampt-knockout mice, alongside cultured valvular endothelial cells and macrophages. The primary outcome was to assess the therapeutic potential of nicotinamide mononucleotide (NMN) supplementation at different stages of disease progression.

 Why this matters for longevity research

The findings of this study are significant for longevity research as they provide insights into how NAD+ depletion contributes to age-related diseases such as CAVD. By understanding the mechanisms behind NAD+ insufficiency and its effects on valvular inflammation and calcification, researchers can explore potential interventions that may extend healthspan. This aligns with broader research themes in the biology of aging, particularly the role of NAD+ in cellular metabolism and its impact on age-related pathologies.

 Key findings

NAD+ levels decline with age, leading to increased inflammation and calcification in aortic valves.

Endothelial cells in aged human valves showed significant suppression of NAMPT-mediated NAD+ salvage.

Loss of NAMPT in endothelial cells resulted in NAD+ depletion, SIRT1 inactivation, and heightened inflammation.

Macrophages displayed paradoxical NAMPT up-regulation, contributing to valvular inflammation.

Early NMN supplementation restored NAD+ levels and reduced inflammation and calcification in valvular cells.

Delayed NMN treatment was less effective in mitigating disease progression.

Elevated plasma NAMPT levels were associated with a higher risk of aortic stenosis.

 The science behind it

NAD+ is a crucial coenzyme involved in various metabolic processes, including energy production and DNA repair. It plays a vital role in regulating sirtuins, a family of proteins that influence aging and cellular health. The decline of NAD+ levels with age is linked to various age-related diseases, including CAVD. In this study, the disruption of NAD+ metabolism was shown to activate inflammatory pathways, particularly through the inactivation of SIRT1 and the hyper-acetylation of nuclear factor kappa-B (NF-κB), which is a key regulator of inflammation. The research highlights how NAD+ insufficiency can lead to a cascade of metabolic alterations that exacerbate age-related conditions.

 How it fits into the longevity field

This study contributes to the growing body of literature exploring the role of NAD+ in aging and longevity. Previous research has established the importance of NAD+ in cellular functions and its potential as a therapeutic target for age-related diseases. Interventions aimed at boosting NAD+ levels, such as NMN supplementation, are being investigated for their potential to improve healthspan and mitigate age-related diseases. This study's findings support the notion that enhancing NAD+ metabolism could be a viable strategy for addressing calcific aortic valve disease and possibly other age-related conditions.

 Practical takeaways

Researchers and informed readers should consider the implications of NAD+ metabolism in age-related diseases, particularly in developing therapeutic strategies. The study underscores the importance of early intervention with NAD+ precursors like NMN, which may offer a promising avenue for clinical evaluation. Further research is needed to explore the full potential of NAD+ repletion therapies in aging populations and their effects on healthspan.

 FAQ

 What is NAD+ and why is it important?

NAD+ is a coenzyme essential for energy metabolism and cellular repair processes, playing a significant role in aging and age-related diseases.

 How does NAD+ deficiency affect the heart?

NAD+ deficiency can lead to increased inflammation and calcification in heart valves, contributing to conditions like calcific aortic valve disease.

 What are the potential therapies for NAD+ depletion?

Therapies such as nicotinamide mononucleotide (NMN) supplementation are being studied for their potential to restore NAD+ levels and improve health outcomes.

 Source: PubMed · Eur Heart J · published 2026-03-17.

## Sources

- PubMed · Eur Heart J: https://pubmed.ncbi.nlm.nih.gov/41841768/