NAD+ Research
NAD+ is a central redox coenzyme and signaling cofactor studied extensively in laboratory models of energy metabolism, DNA repair, and cellular aging. Offered strictly for in-vitro and laboratory research use only.
Also known as: Nicotinamide Adenine Dinucleotide · CAS 53-84-9
NAD+ shuttles electrons in central metabolic reactions (glycolysis, the TCA cycle, oxidative phosphorylation) by cycling between NAD+ and NADH. Beyond redox chemistry, it serves as a consumable substrate for sirtuins, poly(ADP-ribose) polymerases (PARPs), and CD38. Cellular NAD+ pools decline with age in multiple model organisms.
Mechanism of Action
In research models, NAD+ functions in two distinct capacities. As a redox carrier it accepts and donates electrons across metabolic pathways, enabling ATP generation in mitochondria. As a signaling substrate it is consumed by NAD+-dependent enzymes: sirtuins (SIRT1–7) use it for protein deacetylation linked to chromatin remodeling and mitochondrial regulation, while PARPs draw on it during DNA-damage response. CD38 and related glycohydrolases also degrade NAD+. Because these enzymes consume rather than recycle NAD+, intracellular concentration is dynamically balanced by salvage and de novo biosynthesis. Investigators study this interplay to model how NAD+ availability influences metabolic and genomic homeostasis in cultured cells and experimental tissue.
Research Applications
NAD+ is widely used as a reference cofactor in laboratory investigations of mitochondrial bioenergetics, sirtuin enzymology, and the cellular senescence cascade. Research literature examines how restoring NAD+ pools in aged experimental tissue affects mitochondrial function, DNA-repair capacity, and markers of metabolic stress. Cell-based assays employ NAD+ to probe redox balance, immunometabolism, and PARP-mediated pathways. The compound also serves as a benchmark in studies comparing NAD+ precursors and biosynthetic intermediates. All such work is conducted in vitro or in experimental and cell models and not for human or veterinary administration.
Biochemical Properties
NAD+ is a dinucleotide composed of two nucleotides joined through their phosphate groups: one carrying an adenine base, the other a nicotinamide moiety derived from vitamin B3. Its oxidized (NAD+) and reduced (NADH) forms are interconverted continuously, and the NAD+/NADH ratio is a frequently measured indicator of a cell's redox state in research settings. The molecule is highly water-soluble and is typically handled as a stable powder for preparation in laboratory buffers. Researchers studying biosynthesis distinguish NAD+ from its precursors (nicotinamide, nicotinic acid, nicotinamide riboside, and nicotinamide mononucleotide), each of which feeds the salvage and de novo pathways differently in experimental systems.
Applications at a glance
- Reference cofactor in mitochondrial bioenergetics assays
- Substrate in sirtuin and PARP enzymology studies
- Probe for cellular redox-state and NAD+/NADH ratio measurement
- Benchmark in NAD+-precursor comparison research