Details

Autor(en) / Beteiligte

• Covarrubias, Anthony J
• Perrone, Rosalba
• Grozio, Alessia
• Verdin, Eric

Titel

NAD + metabolism and its roles in cellular processes during ageing

Ist Teil von

• Nature reviews. Molecular cell biology, 2021-02, Vol.22 (2), p.119

Ort / Verlag

England

Erscheinungsjahr

2021

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Nicotinamide adenine dinucleotide (NAD ) is a coenzyme for redox reactions, making it central to energy metabolism. NAD is also an essential cofactor for non-redox NAD -dependent enzymes, including sirtuins, CD38 and poly(ADP-ribose) polymerases. NAD can directly and indirectly influence many key cellular functions, including metabolic pathways, DNA repair, chromatin remodelling, cellular senescence and immune cell function. These cellular processes and functions are critical for maintaining tissue and metabolic homeostasis and for healthy ageing. Remarkably, ageing is accompanied by a gradual decline in tissue and cellular NAD levels in multiple model organisms, including rodents and humans. This decline in NAD levels is linked causally to numerous ageing-associated diseases, including cognitive decline, cancer, metabolic disease, sarcopenia and frailty. Many of these ageing-associated diseases can be slowed down and even reversed by restoring NAD levels. Therefore, targeting NAD metabolism has emerged as a potential therapeutic approach to ameliorate ageing-related disease, and extend the human healthspan and lifespan. However, much remains to be learnt about how NAD influences human health and ageing biology. This includes a deeper understanding of the molecular mechanisms that regulate NAD levels, how to effectively restore NAD levels during ageing, whether doing so is safe and whether NAD repletion will have beneficial effects in ageing humans.