Evidence map›Paper›PMID 19346450›Full record

ArticleJournal of biological rhythms2009

Vasoactive intestinal polypeptide entrains circadian rhythms in astrocytes.

Luciano Marpegan, Thomas J Krall, Erik D Herzog

Open access · greenAbstract read
In one paragraph

Article in Journal of biological rhythms, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
1.6field-weighted citation impact, top 20% 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

31 citing papers in PubMed, 56 citations in OpenAlex.

  1. The inferred functional connectome underlying circadian synchronization in the mouse suprachiasmatic nucleus.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  2. Article
  3. Article
  4. Review
  5. Review
  6. Article
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  8. Control of complex behavior by astrocytes and microglia.Neuroscience and biobehavioral reviews · 2022
    Review
  9. Astrocyte Circadian Timekeeping in Brain Health and Neurodegeneration.Advances in experimental medicine and biology · 2021
    Article
  10. Review
  11. Article
  12. Aging and the clock: Perspective from flies to humans.The European journal of neuroscience · 2020
    Review
  13. Review
  14. Review
  15. Article
  16. Article
  17. Review
  18. Review
  19. Glial cell regulation of rhythmic behavior.Methods in enzymology · 2015
    Review
  20. Network-mediated encoding of circadian time: the suprachiasmatic nucleus (SCN) from genes to neurons to circuits, and back.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2014
    Review
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

3 authors at 1 institution in 1 country.

Luciano MarpeganDepartment of Biology, Washington University, St. Louis, Missouri 63130-4899, USA.
Thomas J Krall
Erik D Herzog
Washington University in St. Louis · US

Funding

CELLULAR BASIS OF CIRCADIAN RHYTHMS IN MAMMALSR01MH063104 · NIMH · WASHINGTON UNIVERSITY · PI HERZOG, ERIK · 2000 to 2013
$4.2M
NIMH NIH HHS R01 MH063104PHS HHS 63104
6 · The paper itself

Abstract

Many mammalian cell types show daily rhythms in gene expression driven by a circadian pacemaker. For example, cultured astrocytes display circadian rhythms in Period1 and Period2 expression. It is not known, however, how or which intercellular factors synchronize and sustain rhythmicity in astrocytes. Because astrocytes are highly sensitive to vasoactive intestinal polypeptide (VIP), a neuropeptide released by neurons and important for the coordination of daily cycling, the authors hypothesized that VIP entrains circadian rhythms in astrocytes. They used astrocyte cultures derived from knock-in mice containing a bioluminescent reporter of PERIOD2 (PER2) protein, to assess the effects of VIP on the rhythmic properties of astrocytes. VIP induced a dose-dependent increase in the peak-to-trough amplitude of the ensemble rhythms of PER2 expression with maximal effects near 100 nM VIP and threshold values between 0.1 and 1 nM. VIP also induced dose- and phase-dependent shifts in PER2 rhythms and daily VIP administration entrained bioluminescence rhythms of astrocytes to a predicted phase angle. This is the first demonstration that a neuropeptide can entrain glial cells to a phase predicted by a phase-response curve. The authors conclude that VIP potently entrains astrocytes in vitro and is a candidate for coordinating daily rhythms among glia in the brain.

Indexed as

AnimalsAstrocytesBiological ClocksCell Cycle ProteinsCells, CulturedCircadian RhythmGene Knock-In TechniquesMiceNuclear ProteinsPeriod Circadian ProteinsTranscription FactorsVasoactive Intestinal PeptideCell Cycle ProteinsNuclear ProteinsPer2 protein, mousePeriod Circadian ProteinsTranscription FactorsVasoactive Intestinal Peptide

Identifiers

PMID19346450
PMCPMC2679954
OpenAlexW2051788318

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.