Cited by 265Neurogenesis and neuroplasticity mechanismsSirtuins and Resveratrol in MedicineNuclear Receptors and Signaling

Specific ablation of Nampt in adult neural stem cells recapitulates their functional defects during aging

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Stein, Liana R, Imai, Shin‐ichiro·2014·The EMBO Journal

Abstract

Neural stem/progenitor cell (NSPC) proliferation and self-renewal, as well as insult-induced differentiation, decrease markedly with age. The molecular mechanisms responsible for these declines remain unclear. Here, we show that levels of NAD(+) and nicotinamide phosphoribosyltransferase (Nampt), the rate-limiting enzyme in mammalian NAD(+) biosynthesis, decrease with age in the hippocampus. Ablation of Nampt in adult NSPCs reduced their pool and proliferation in vivo. The decrease in the NSPC pool during aging can be rescued by enhancing hippocampal NAD(+) levels. Nampt is the main source of NSPC NAD(+) levels and required for G1/S progression of the NSPC cell cycle. Nampt is also critical in oligodendrocytic lineage fate decisions through a mechanism mediated redundantly by Sirt1 and Sirt2. Ablation of Nampt in the adult NSPCs in vivo reduced NSPC-mediated oligodendrogenesis upon insult. These phenotypes recapitulate defects in NSPCs during aging, giving rise to the possibility that Nampt-mediated NAD(+) biosynthesis is a mediator of age-associated functional declines in NSPCs.

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Authors
Stein, L. R., & Imai, S.
Affiliations
Washington University in St. Louis (US)
Corresponding author
Imai, Shin‐ichiro
Venue
The EMBO Journal
Published
2014-05-08
Volume
33
Issue
12
Pages
1321-1340
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2003701712
Cited by
265
References
86
Citations by year
2026: 3 · 2025: 18 · 2024: 15 · 2023: 31 · 2022: 24 · 2021: 32 · 2020: 35 · 2019: 25 · 2018: 21 · 2017: 28 · 2016: 17 · 2015: 12 · 2014: 4
FWCI
7.01
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (AG024150, AG037457)
  • Ellison Medical Foundation
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
Keywords
visfatin, NAD biosynthesis, neural stem/progenitor cells, aging, hippocampus, cell proliferation, self-renewal, G1/S cell cycle progression, oligodendrogenesis, SIRT1, SIRT2, oligodendrocyte differentiation, NAD+ supplementation
MeSH terms
Aging, Animals, Bromodeoxyuridine, Cell Differentiation, Crosses, Genetic, Cuprizone, Fluorescent Antibody Technique, Mice, Transgenic, Nicotinamide Mononucleotide, Cytokines, Cell Culture Techniques, Cell Proliferation, Mice, Adult Stem Cells, Nicotinamide Phosphoribosyltransferase, Neural Stem Cells

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