NAD+

Chemical Makeup:

• Chemical Name: Nicotinamide Adenine Dinucleotide (Oxidized form)
• Molecular Formula: C21, H27, N7, O14, P2
• Molecular Weight: 663.43 g/mol
• Synonyms: NAD, Coenzyme I, DPN, Diphosphopyridine Nucleotide
• Solubility: Soluble in water

The following information is for educational purposes only and refers to data gathered from in vitro and animal research models.

NAD+ and Mitochondrial Function

Research has firmly established NAD+ as a linchpin in mitochondrial bioenergetics. In murine models, intracellular NAD+ levels were observed to decline with age, correlating with mitochondrial dysfunction. Studies suggest that restoring NAD+ availability may promote mitochondrial biogenesis. Specifically, it acts as a cofactor in the conversion of nutrients into adenosine triphosphate (ATP). When NAD+ availability is restricted in cell cultures, a marked decrease in ATP production and a subsequent increase in oxidative stress markers have been noted.

NAD+ and Sirtuin Activation

Sirtuins are a family of NAD+-dependent deacetylases often referred to as "longevity genes." Research indicates that sirtuin activity is strictly limited by the availability of NAD+. In yeast and mouse models, elevated levels of NAD+ appeared to upregulate SIRT1 activity. This activation is hypothesized to influence downstream pathways related to cellular resilience and apoptosis regulation. It has been proposed that the NAD+-SIRT1 axis mediates the beneficial effects of caloric restriction observed in animal subjects.

NAD+ and DNA Repair Mechanisms

NAD+ is consumed by PARP enzymes (Poly (ADP-ribose) polymerases) in response to DNA damage. Studies dealing with genotoxic stress in tissue samples indicate that PARP1 binds to DNA strand breaks and utilizes NAD+ to form poly-ADP-ribose chains, which signal the cellular repair machinery. Consequently, rapid depletion of cytosolic NAD+ pools has been observed following significant DNA damage. Research suggests that maintaining adequate NAD+ concentrations is vital for the efficacy of these repair mechanisms and the prevention of genomic instability.

NAD+ and Neuroprotection

In models of neurodegeneration, including Alzheimer’s and Parkinson’s distinct mouse models, NAD+ precursors were evaluated for their impact on neuronal health. Findings suggest that NAD+ may mitigate axonal degeneration and protect against excitotoxicity. The mechanism appears to involve the preservation of mitochondrial function within neurons and the reduction of reactive oxygen species (ROS). Furthermore, data indicates potential interactions with PGC-a, a regulator of mitochondrial biogenesis, suggesting a pathway through which neuronal energy homeostasis is maintained.

NAD+ and Circadian Rhythm

Investigations into the circadian clock have revealed a bidirectional relationship between the molecular clock and NAD+ metabolism. The CLOCK:BMAL1 complex, a core component of the circadian rhythm in mammals, has been shown to regulate the expression of NAMPT, the rate-limiting enzyme in the NAD+ salvage pathway. Conversely, SIRT1, which is NAD+-dependent, modulates the activity of the CLOCK:BMAL1 complex. This feedback loop suggests that NAD+ levels oscillate in a diurnal rhythm and may influence metabolic adaptability relative to the light/dark cycle in animal subjects.

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Side Effects in Research Models:

In animal toxicity studies, high-dose administration of NAD+ or its precursors has been occasionally associated with hepatic stress. Rapid injection in murine subjects has been observed to cause transient physiological changes, including tremors or lethargy, though these are typically dose-dependent. Researchers should exercise caution regarding the stability of the lyophilized powder, as degradation products may alter experimental outcomes.

Storage: 

Store lyophilized powder at -20°C. Reconstituted solutions should be used immediately or stored at 4°C for no longer than 48 hours to prevent hydrolysis.

Research Use Only (RUO) Disclaimer:

This product is sold strictly for laboratory research purposes only. It is not intended for human consumption, diagnostic use, or therapeutic application. The properties listed above are based on academic literature regarding animal and in vitro studies. This product is not a dietary supplement, drug, or food. Handling should be performed only by qualified researchers equipped with appropriate personal protective equipment (PPE).