Evidence map›Paper›PMID 25063362›Full record

ArticleBrain research2014

Circadian modulation of memory and plasticity gene products in a diurnal species.

Carmel A Martin-Fairey, Antonio A Nunez

Open access · greenAbstract read
In one paragraph

Article in Brain research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.7field-weighted citation impact, top 18% 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

16 citing papers in PubMed, 36 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Time-of-day as a critical biological variable.Neuroscience and biobehavioral reviews · 2021
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Article
  14. Synchrony and desynchrony in circadian clocks: impacts on learning and memory.Learning & memory (Cold Spring Harbor, N.Y.) · 2015
    Review
  15. Article
  16. 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

2 authors at 1 institution in 1 country.

Carmel A Martin-FaireyDepartment of Psychology, Michigan State University, East Lansing, MI 48824, USA. Electronic address: nunez@msu.edu.
Antonio A NunezDepartment of Psychology, Michigan State University, East Lansing, MI 48824, USA; Neuroscience Program, Michigan State University, East Lansing, MI 48824, USA. Electronic address: Martinf3@msu.edu.
Michigan State University · US

Funding

The Psychobiology of Rhythms in Diurnal MammalsR01MH053433 · NIMH · MICHIGAN STATE UNIVERSITY · PI SMALE, LAURA · 1995 to 2009
$2.4M
NIMH NIH HHS R01 MH053433NIMH NIH HHS R01MH53433
6 · The paper itself

Abstract

Cognition is modulated by circadian rhythms, in both nocturnal and diurnal species. Rhythms of clock gene expression occur in brain regions that are outside the master circadian oscillator of the suprachiasmatic nucleus and that control cognitive functions, perhaps by regulating the expression neural-plasticity genes such as brain derived neurotrophic factor (BDNF) and its high affinity receptor, tyrosine kinase B (TrkB). In the diurnal grass rat (Arvicanthis niloticus), the hippocampus shows rhythms of clock genes that are 180° out of phase with those of nocturnal rodents. Here, we examined the hypothesis that this reversal extends to the optimal phase for learning a hippocampal-dependent task and to the phase of hippocampal rhythms in BDNF/TrkB expression. We used the Morris water maze (MWM) to test for time of day differences in reference memory and monitored daily patterns of hippocampal BDNF/TrkB expression in grass rats. Grass rats showed superior long-term retention of the MWM, when the training and testing occurred during the day as compared to the night, at a time when nocturnal laboratory rats show superior retention; acquisition of the MWM was not affected by time of day. BDNF/TrkB expression was rhythmic in the hippocampus of grass rats, and the phase of the rhythms was reversed compared to that of nocturnal rodents. Our findings provide correlational evidence for the claim that the circadian regulation of cognition may involve rhythms of BDNF/TrkB expression in the hippocampus and that their phase may contribute to species differences in the optimal phase for learning.

Indexed as

AnimalsBrain-Derived Neurotrophic FactorCircadian RhythmGene ExpressionHippocampusMaleMaze LearningMurinaeNeuropsychological TestsPhotoperiodRandom AllocationReceptor, trkBSpatial MemoryBrain-Derived Neurotrophic FactorReceptor, trkBBDNF/TrkBCircadian rhythmCognitionHippocampusMorris water mazePlasticity genes

Identifiers

PMID25063362
PMCPMC4157103
OpenAlexW2078702268

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.