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Related Experiment Videos

Niacin and carcinogenesis.

James B Kirkland1

  • 1Department of Human Biology and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada.

Nutrition and Cancer
|December 24, 2003
PubMed
Summary

Niacin (vitamin B3) status impacts DNA repair and genomic stability, influencing cancer risk and chemotherapy side effects. Adequate niacin is crucial for cellular processes that maintain health and prevent disease.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Nutritional Science

Background:

  • Dietary niacin (vitamin B3) status influences critical cellular functions.
  • Niacin, as NAD, is vital for DNA repair, genomic stability, and immune function.
  • These processes are linked to cancer risk and chemotherapy outcomes.

Purpose of the Study:

  • To explore the multifaceted roles of niacin in cellular processes.
  • To understand niacin's impact on DNA repair, genomic stability, and cancer risk.
  • To elucidate niacin's involvement in ADP-ribosylation and calcium signaling pathways.

Main Methods:

  • Review of biochemical pathways involving niacin and NAD.
  • Analysis of ADP-ribosylation reactions, including PARP-1 activity.
  • Examination of NAD's role in mono(ADP-ribose) and cyclic nucleotide synthesis.
  • Investigation of calcium signaling mediators like NAADP.
  • Synthesis of evidence from animal models and human epidemiological data.

Main Results:

  • Niacin, via NAD, is essential for ADP-ribosylation reactions, particularly by PARP-1 in DNA damage response.
  • NAD is involved in mono(ADP-ribose) synthesis and calcium signaling pathways.
  • Disruptions in these niacin-dependent pathways can impair genomic stability and promote cancer.
  • Evidence from animal and human studies supports niacin's impact on cancer risk.

Conclusions:

  • Niacin status significantly affects DNA repair, genomic stability, and immune function.
  • Impaired niacin metabolism can lead to genomic instability and increased cancer susceptibility.
  • Niacin plays a critical role in cellular signaling and stress responses, impacting overall health and disease risk.

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