Evidence map›Paper›PMID 25633578›Full record

ArticlePLoS biology2015

Calorie restriction-mediated replicative lifespan extension in yeast is non-cell autonomous.

Szu-Chieh Mei, Charles Brenner

Open access · goldAbstract read
In one paragraph

Article in PLoS biology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.7field-weighted citation impact, top 17% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed, 24 citations in OpenAlex.

  1. Redox Molecules in Aging and Neurodegenerative Disorders.International journal of molecular sciences · 2026
    Review
  2. Review
  3. Article
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  5. Article
  6. Review
  7. Article
  8. Article
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  10. Slowing ageing by design: the rise of NADNature reviews. Molecular cell biology · 2016
    Review
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  12. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Szu-Chieh MeiDepartment of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America.
Charles BrennerDepartment of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, Iowa, United States of America.
University of Iowa · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In laboratory yeast strains with Sir2 and Fob1 function, wild-type NAD+ salvage is required for calorie restriction (CR) to extend replicative lifespan. CR does not significantly alter steady state levels of intracellular NAD+ metabolites. However, levels of Sir2 and Pnc1, two enzymes that sequentially convert NAD+ to nicotinic acid (NA), are up-regulated during CR. To test whether factors such as NA might be exported by glucose-restricted mother cells to survive later generations, we developed a replicative longevity paradigm in which mother cells are moved after 15 generations on defined media. The experiment reveals that CR mother cells lose the longevity benefit of CR when evacuated from their local environment to fresh CR media. Addition of NA or nicotinamide riboside (NR) allows a moved mother to maintain replicative longevity despite the move. Moreover, conditioned medium from CR-treated cells transmits the longevity benefit of CR to moved mother cells. Evidence suggests the existence of a longevity factor that is dialyzable but is neither NA nor NR, and indicates that Sir2 is not required for the longevity factor to be produced or to act. Data indicate that the benefit of glucose-restriction is transmitted from cell to cell in budding yeast, suggesting that glucose restriction may benefit neighboring cells and not only an individual cell.

Indexed as

Caloric RestrictionCulture Media, ConditionedGene Expression Regulation, FungalGlucoseMicrobial ViabilitySaccharomyces cerevisiaeSilent Information Regulator Proteins, Saccharomyces cerevisiaeSirtuin 2Culture Media, ConditionedGlucoseSilent Information Regulator Proteins, Saccharomyces cerevisiaeSIR2 protein, S cerevisiaeSirtuin 2

Identifiers

PMID25633578
PMCPMC4310591
OpenAlexW2114193791

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.