# NAD+ Restoration Mitigates Endothelial Dysfunction in Alzheimer's Disease

Canonical source: https://retacompare.com/research/nad-restoration-mitigates-endothelial-dysfunction-in-alzheimer-s-disease

NAD+ Metabolism · 2026-04-01


    NAD+ restoration may alleviate endothelial dysfunction and neuroinflammation linked to Alzheimer's disease. This study investigates the role of nicotinamide adenine dinucleotide (NAD+) in vascular aging and its implications for neuroinflammation in Alzheimer's disease (AD). By examining the interplay between NAD+ deficiency and endothelial senescence, researchers aim to uncover potential therapeutic strategies for mitigating AD pathology.

 What this study examined

The study utilized APP/PS1 mice, a model for Alzheimer's disease, alongside amyloid beta (Aβ)-challenged brain endothelial cells (BECs) to explore the effects of NAD+ depletion. Researchers administered nicotinamide riboside (NR) to these mice to assess whether restoring NAD+ homeostasis could reduce vascular and inflammatory pathology associated with AD. The primary outcomes included evaluating mitochondrial integrity, cGAS/STING signaling pathways, and overall cognitive function.

 Why this matters for longevity research

This research is significant for longevity studies as it highlights the critical role of NAD+ in maintaining endothelial function and mitigating neuroinflammation, both of which are pivotal in the aging process. Endothelial dysfunction is an early event in Alzheimer's disease, and understanding its molecular underpinnings could lead to interventions that not only extend lifespan but also enhance healthspan by preserving cognitive function and vascular health.

 Key findings

NAD+ deficiency was linked to the oligomerization of voltage-dependent anion channel 1 (VDAC1) and mitochondrial DNA (mtDNA) leakage.

Activation of the cGAS/STING-IRF3 pathway was observed, promoting endothelial senescence and the senescence-associated secretory phenotype (SASP).

Increased expression of the NAD+-consuming enzyme CD38 was noted in senescent BECs.

Senescent BECs triggered IL-6-dependent activation of microglia, exacerbating neuroinflammation.

Nicotinamide riboside treatment restored mitochondrial integrity and suppressed cGAS-STING signaling.

NR treatment improved vascular function and cognitive performance in APP/PS1 mice.

The study underscores the potential of NAD+ restoration as a therapeutic strategy for Alzheimer's disease.

 The science behind it

NAD+ is a crucial coenzyme involved in various cellular processes, including energy metabolism, DNA repair, and cell signaling. It plays a vital role in the activity of sirtuins, a family of proteins that regulate cellular health and longevity. The depletion of NAD+ has been associated with aging and age-related diseases, including Alzheimer's disease. In this study, the authors found that NAD+ deficiency leads to mitochondrial dysfunction and activates inflammatory pathways that contribute to vascular aging and neuroinflammation. This aligns with broader research on the importance of NAD+ in promoting cellular resilience and longevity.

 How it fits into the longevity field

This study adds to a growing body of literature exploring the therapeutic potential of NAD+ precursors like nicotinamide riboside. Previous research has suggested that enhancing NAD+ levels can improve metabolic health, promote DNA repair, and extend lifespan in various model organisms. The findings from this study indicate that NAD+ restoration may also have significant implications for neurovascular health, positioning it as a promising intervention in the longevity field. Other interventions, such as caloric restriction and exercise, have also been shown to influence NAD+ levels and promote healthspan.

 Practical takeaways

Researchers and informed readers should consider the implications of NAD+ restoration in the context of aging and neurodegenerative diseases. The findings suggest that targeting NAD+ levels could be a viable strategy for mitigating the effects of vascular aging and neuroinflammation. Further studies are warranted to explore the long-term effects of NAD+ supplementation and its potential role in enhancing healthspan and cognitive function in aging populations.

 FAQ

 What is NAD+ and why is it important?

NAD+ is a coenzyme essential for cellular metabolism and energy production, playing a crucial role in maintaining cellular health and longevity.

 How does NAD+ depletion affect aging?

NAD+ depletion is associated with mitochondrial dysfunction, increased inflammation, and cellular senescence, all of which contribute to the aging process.

 Can NAD+ supplementation improve cognitive function?

Research suggests that NAD+ supplementation may enhance mitochondrial function and reduce neuroinflammation, potentially improving cognitive function in aging individuals.

 Source: PubMed · Alzheimers Dement · published 2026-04-01.

## Sources

- PubMed · Alzheimers Dement: https://pubmed.ncbi.nlm.nih.gov/42033099/