Evidence map›Paper›PMID 22217096›Full record

ArticleChronobiology international2012

Effects of aging on the molecular circadian oscillations in Drosophila.

Kuntol Rakshit, Natraj Krishnan, Elżbieta M Guzik, Elżbieta Pyza, Jadwiga M Giebultowicz

Open access · greenAbstract read
In one paragraph

Article in Chronobiology international, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
3.1field-weighted citation impact, top 8% 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

61 citing papers in PubMed, 94 citations in OpenAlex.

  1. Article
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  4. Sleep regulation inFrontiers in neuroscience · 2026
    Review
  5. Journal of biological rhythms · 2025
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  6. A millisecond parameter space for phase-shifting the circadian pacemaker with near-ultraviolet light.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2025
    Article
  7. Article
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  12. Evolutionary formation of melatonin and vitamin D in early life forms: insects take centre stage.Biological reviews of the Cambridge Philosophical Society · 2024
    Review
  13. Article
  14. Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article

1 more citing papers are in PubMed but not listed here.

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

5 authors at 2 institutions in 2 countries.

Kuntol RakshitDepartment of Zoology, Oregon State University, Corvallis, Oregon 97331, USA.
Natraj Krishnan
Elżbieta M Guzik
Elżbieta Pyza
Jadwiga M Giebultowicz
Oregon State University · USJagiellonian University · PL

Funding

Circadian Clocks and AgingR01AG045830 · NIA · OREGON STATE UNIVERSITY · PI GIEBULTOWICZ, JADWIGA M, KRETZSCHMAR, DORIS · 2013 to 2017
$1.3M
Role of circadian clocks in maintaining a healthy nervous systemR21NS075500 · NINDS · OREGON STATE UNIVERSITY · PI GIEBULTOWICZ, JADWIGA M, RADYUK, SVETLANA NIKOLAEVNA · 2011 to 2012
$448k
Exploring links between circadian clocks and aging.R21AG038989 · NIA · OREGON STATE UNIVERSITY · PI GIEBULTOWICZ, JADWIGA M, KRISHNAN, NATRAJ · 2011 to 2012
$393k
NIA NIH HHS 1R21AG038989NIA NIH HHS R01 AG045830NIA NIH HHS R21 AG038989NINDS NIH HHS R21 NS075500NINDS NIH HHS R21-NS-075500
6 · The paper itself

Abstract

Circadian clocks maintain temporal homeostasis by generating daily output rhythms in molecular, cellular, and physiological functions. Output rhythms, such as sleep/wake cycles and hormonal fluctuations, tend to deteriorate during aging in humans, rodents, and fruit flies. However, it is not clear whether this decay is caused by defects in the core transcriptional clock, or weakening of the clock-output pathways, or both. The authors monitored age-related changes in behavioral and molecular rhythms in Drosophila melanogaster. Aging was associated with disrupted rest/activity patterns and lengthening of the free-running period of the circadian locomotor activity rhythm. The expression of core clock genes was measured in heads and bodies of young, middle-aged, and old flies. Transcriptional oscillations of four clock genes, period, timeless, Par domain protein 1ϵ, and vrille, were significantly reduced in heads, but not in bodies, of aging flies. It was determined that reduced transcription of these genes was not caused by the deficient expression of their activators, encoded by Clock and cycle genes. Interestingly, transcriptional activation by CLOCK-CYCLE complexes was impaired despite reduced levels of the PERIOD repressor protein in old flies. These data suggest that aging alters the properties of the core transcriptional clock in flies such that both the positive and the negative limbs of the clock are attenuated.

Indexed as

AgingCircadian RhythmAnimalsCLOCK ProteinsCrosses, GeneticDrosophila melanogasterMaleMicroscopy, FluorescenceModels, BiologicalMovementOscillometryReal-Time Polymerase Chain ReactionTime FactorsTranscription, GeneticCLOCK Proteins

Identifiers

PMID22217096
PMCPMC3265550
OpenAlexW2112237181

What OpenQuestion holds

Textmetadata
LicenceTDM
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.