Cited by 146Sirtuins and Resveratrol in MedicineGut microbiota and healthFolate and B Vitamins Research

NAD precursors cycle between host tissues and the gut microbiome

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Chellappa, Karthikeyani, McReynolds, Melanie R., Lu, Wenyun, Zeng, Xianfeng, Makarov, Mikhail, Hayat, Faisal, Mukherjee, Sarmistha, Bhat, Yashaswini R. +12 more·2022·Cell Metabolism

Published version of a preprint

Abstract

Nicotinamide adenine dinucleotide (NAD) is an essential redox cofactor in mammals and microbes. Here we use isotope tracing to investigate the precursors supporting NAD synthesis in the gut microbiome of mice. We find that dietary NAD precursors are absorbed in the proximal part of the gastrointestinal tract and not available to microbes in the distal gut. Instead, circulating host nicotinamide enters the gut lumen and supports microbial NAD synthesis. The microbiome converts host-derived nicotinamide into nicotinic acid, which is used for NAD synthesis in host tissues and maintains circulating nicotinic acid levels even in the absence of dietary consumption. Moreover, the main route from oral nicotinamide riboside, a widely used nutraceutical, to host NAD is via conversion into nicotinic acid by the gut microbiome. Thus, we establish the capacity for circulating host micronutrients to feed the gut microbiome, and in turn be transformed in a manner that enhances host metabolic flexibility.

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Crossref · 10.1016/j.cmet.2022.11.004

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Authors
Chellappa, K., McReynolds, M. R., Lu, W., Zeng, X., Makarov, M., Hayat, F., Mukherjee, S., Bhat, Y. R., Lingala, S. R., Shima, R. T., Descamps, H. C., Cox, T., Ji, L., Jankowski, C., Chu, Q., Davidson, S. M., Thaiss, C. A., Migaud, M. E., Rabinowitz, J. D., & Baur, J. A.
Affiliations
  • University of Pennsylvania (US)
  • Princeton University (US)
  • USA Mitchell Cancer Institute (US)
Corresponding author
  • Rabinowitz, Joshua D.
  • Baur, Joseph A.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2022-12
Volume
34
Issue
12
Pages
1947-1959.e5
ISSN
1550-4131 (ISSN-L)
OpenAlex
W4311572757
Cited by
146
References
88
Citations by year
2026: 39 · 2025: 50 · 2024: 33 · 2023: 21 · 2022: 3
FWCI
15.22
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • NIDDK (R01DK098656)
  • Burroughs Wellcome Fund
  • Rutgers Cancer Institute of New Jersey
  • Diabetes Research Center (P30-DK19525, S10-OD025098)
  • Howard Hughes Medical Institute
  • National Institutes of Health (CA211437, DP1DK113643, R01AG043483)
Topics
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Rheumatology › Folate and B Vitamins Research
Keywords
NAD+ synthesis, nicotinamide, nicotinic acid, nicotinamide riboside, gut microbiota, isotope tracing, redox cofactors
MeSH terms
Animals, Mammals, NAD, Niacin, Niacinamide, Mice

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