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A family of seven NAD+-dependent protein deacetylases (SIRT1-7) that regulate gene expression, DNA repair, metabolism, and aging processes.
Sirtuins are a family of seven evolutionarily conserved NAD+-dependent enzymes (SIRT1 through SIRT7) found in different cellular compartments. They regulate a vast array of biological processes including gene silencing, DNA repair, mitochondrial biogenesis, fatty acid oxidation, glucose homeostasis, and inflammation. SIRT1, the most studied mammalian sirtuin, deacetylates transcription factors including p53, FOXO, PGC-1alpha, and NF-kB, providing anti-aging, metabolic, and anti-inflammatory effects. Sirtuins are obligate NAD+ consumers, meaning their activity is directly limited by cellular NAD+ availability. The age-related decline in NAD+ levels therefore reduces sirtuin activity, contributing to the hallmarks of aging. This dependency makes NAD+ supplementation a compelling research strategy for supporting sirtuin function.
Nicotinamide Adenine Dinucleotide, an essential coenzyme in every living cell that drives energy metabolism, DNA repair, and sirtuin-mediated longevity pathways.
A collection of cellular processes that detect and correct damage to DNA molecules, essential for maintaining genomic integrity and preventing disease.
A cellular self-cleaning process that degrades and recycles damaged organelles, misfolded proteins, and pathogens, crucial for longevity and cellular health.
The irreversible state of cell cycle arrest in which cells remain metabolically active but stop dividing, contributing to tissue aging and chronic inflammation.
Double-membrane organelles responsible for generating cellular energy (ATP) through oxidative phosphorylation, also involved in apoptosis and calcium signalling.
The physiological process of forming new blood vessels from pre-existing vasculature, essential for wound healing, tissue repair, and nutrient delivery.
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