Niacin.

Area of Science:

• Biochemistry and Molecular Biology
• Nutritional Science
• Epigenetics and Aging

Background:

• Niacin (nicotinic acid and nicotinamide) is a vitamin precursor to essential cofactors nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP).
• NAD(P) are vital for cellular redox reactions, metabolism, respiration, and serve as cosubstrates for enzymes like poly(ADP-ribose)polymerases and sirtuins.

Purpose of the Study:

• To investigate the link between dietary niacin, NAD(P) levels, and the function of NAD(P)-dependent epigenetic regulators.
• To explore the role of niacin in regulating physiological processes, including genetic stability, metabolism, and aging.

Main Methods:

• Literature review and synthesis of current research on niacin metabolism and its enzymatic targets.
• Analysis of the connection between dietary niacin intake and NAD(P) availability.
• Examination of the impact of NAD(P) levels on epigenetic regulators and associated physiological functions.

Main Results:

• Growing evidence highlights a strong correlation between dietary niacin, cellular NAD(P) pools, and the activity of key epigenetic enzymes.
• Niacin intake influences genetic stability and epigenetic mechanisms controlling metabolism and aging.
• NAD-related pathways are implicated in various diseases, including cancer, metabolic disorders, and cardiovascular conditions.

Conclusions:

• Dietary niacin plays a central role in regulating fundamental physiological processes through NAD(P) and epigenetic pathways.
• Understanding niacin's role is shifting its perception from a simple vitamin to a potential therapeutic agent for diverse diseases.
• Further research into niacin's therapeutic potential for NAD-related conditions is warranted.