Cellular NAD+ Pool Restoration Pathway (None)

The cellular NAD+ pool restoration pathway refers to the set of biochemical processes that maintain and replenish intracellular levels of nicotinamide adenine dinucleotide (NAD+), a critical coenzyme involved in redox reactions, energy metabolism, DNA repair, gene expression regulation, and cell survival. The restoration of the NAD+ pool is essential for sustaining cellular health and function, especially under conditions where NAD+ is consumed or degraded by various enzymes. The pathway involves de novo synthesis, the Preiss-Handler pathway, and the salvage pathway, with key enzymes including NAMPT, NMNAT1-3, and NRK1/2. Targeting this pathway has therapeutic implications for age-related diseases, neurodegeneration, and metabolic disorders.

Supplementation of NAD+ precursors to enhance NAD+ biosynthesis.