Cited by 112Sirtuins and Resveratrol in MedicineBiochemical and Molecular ResearchGenetics, Aging, and Longevity in Model Organisms

NAD+ flux is maintained in aged mice despite lower tissue concentrations

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McReynolds, Melanie R., Chellappa, Karthikeyani, Chiles, Eric, Jankowski, Connor, Shen, Yihui, Chen, Li, Descamps, Hélène C., Mukherjee, Sarmistha +13 more·2021·Cell Systems

Abstract

NAD+ is an essential coenzyme for all living cells. NAD+ concentrations decline with age, but whether this reflects impaired production or accelerated consumption remains unclear. We employed isotope tracing and mass spectrometry to probe age-related changes in NAD+ metabolism across tissues. In aged mice, we observed modest tissue NAD+ depletion (median decrease ∼30%). Circulating NAD+ precursors were not significantly changed, and isotope tracing showed the unimpaired synthesis of nicotinamide from tryptophan. In most tissues of aged mice, turnover of the smaller tissue NAD+ pool was modestly faster such that absolute NAD+ biosynthetic flux was maintained, consistent with more active NAD+-consuming enzymes. Calorie restriction partially mitigated age-associated NAD+ decline by decreasing consumption. Acute inflammatory stress induced by LPS decreased NAD+ by impairing synthesis in both young and aged mice. Thus, the decline in NAD+ with normal aging is relatively subtle and occurs despite maintained NAD+ production, likely due to increased consumption.

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Crossref · 10.1016/j.cels.2021.09.001

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  • NAD+ levels decrease in various tissues during aging and play a critical role in the pathophysiology of age-associated metabolic disorders, neurodegenerative diseases, and mental disorders.

    “It is recognized the decrease of NAD+ levels in various tissues during aging [11, 13, 96, 97], playing a critical role in the pathophysiology of several diseases, including age-associated metabolic disorders, neurodegenerative diseases, and mental disorders [14].”

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Authors
McReynolds, M. R., Chellappa, K., Chiles, E., Jankowski, C., Shen, Y., Chen, L., Descamps, H. C., Mukherjee, S., Bhat, Y. R., Lingala, S. R., Chu, Q., Botolin, P., Hayat, F., Doke, T., Susztak, K., Thaiss, C. A., Lu, W., Migaud, M. E., Su, X., Rabinowitz, J. D., & Baur, J. A.
Affiliations
  • Princeton University (US)
  • University of Pennsylvania (US)
  • Rutgers, The State University of New Jersey (US)
  • USA Mitchell Cancer Institute (US)
Corresponding author
  • Rabinowitz, Joshua D.
  • Baur, Joseph A.
Venue
Cell Systems
Publisher
Elsevier BV
Published
2021-12
Volume
12
Issue
12
Pages
1160-1172.e4
ISSN
2405-4712 (ISSN-L)
OpenAlex
W3199408799
Cited by
112
References
79
Citations by year
2026: 19 · 2025: 21 · 2024: 25 · 2023: 28 · 2022: 17 · 2021: 2
FWCI
9.92
Type
journal article
Language
en
Open access
Locations
  • Cell Systems (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • NIDDK (R01DK098656, DP1DK113643)
  • Crohn's and Colitis Foundation of America
  • National Institutes of Health
  • Princeton University
  • Children's Hospital of Philadelphia
  • Rutgers Cancer Institute of New Jersey
  • Diabetes Research Center (P30-DK19525)
  • Burroughs Wellcome Fund
  • NIA (R01AG043483)
  • Howard Hughes Medical Institute
  • NCI (CA211437, -CCSG P30CA072720-5923)
Topics
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Molecular Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
NAD+ metabolism, aging, NAD biosynthesis, NAD+ consumption, tryptophan, NAD+ precursors, caloric restriction, lipopolysaccharide, inflammation, aged mice
MeSH terms
Aging, Animals, NAD, Niacinamide, Caloric Restriction, Mice

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