Evidence map›Paper›PMID 18687681›Full record

ArticleThe Journal of biological chemistry2008

CLOCK is required for maintaining the circadian rhythms of Opsin mRNA expression in photoreceptor cells.

Ping Li, Shyam S Chaurasia, Yan Gao, Aprell L Carr, P Michael Iuvone, Lei Li

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
0.6field-weighted citation impact, top 42% 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

17 citing papers in PubMed, 44 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Article
  6. Article
  7. Daily mitochondrial dynamics in cone photoreceptors.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  8. Ontogenetic expression rhythms of visual opsins in senegalese sole are modulated by photoperiod and light spectrum.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2020
    Article
  9. Article
  10. Zebrafish Lacking Circadian GeneFrontiers in behavioral neuroscience · 2018
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. 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

6 authors at 3 institutions in 2 countries.

Ping LiDepartment of Biological Sciences, University of Notre Dame, Notre Dame, Indiana 46556, USA.
Shyam S Chaurasia
Yan Gao
Aprell L Carr
P Michael Iuvone
Lei Li
University of Notre Dame · USEmory University · USNankai University · CN

Funding

P30-Core Grant for Vision Research Core CP30EY006360 · NEI · EMORY UNIVERSITY · PI BOATRIGHT, JEFFREY H · 1986 to 2025
$15.3M
Neuromodulators and Circadian Clocks: Roles in Retinal Function and DysfunctionR01EY004864 · NEI · EMORY UNIVERSITY · PI IUVONE, P MICHAEL · 1985 to 2018
$7.0M
Centrifugal Modulation of Visual SensitivityR01EY013147 · NEI · UNIVERSITY OF NOTRE DAME · PI LI, LEI · 2002 to 2010
$1.8M
Neuromodulators and Signaling Cascades in RetinaR01EY014764 · NEI · EMORY UNIVERSITY · PI IUVONE, P MICHAEL · 2004 to 2007
$1.4M
NEI NIH HHS EY004864NEI NIH HHS EY 014764NEI NIH HHS P30 EY006360NEI NIH HHS P30 EY03630NEI NIH HHS R01 EY004864NEI NIH HHS R01 EY013147
6 · The paper itself

Abstract

In zebrafish, the expression of long-wavelength cone (LC) opsin mRNA fluctuated rhythmically between the day and night. In a 24-h period, expression was high in the afternoon and low in the early morning. This pattern of fluctuation persisted in zebrafish that were kept in constant darkness, suggesting an involvement of circadian clocks. Functional expression of Clock, a circadian clock gene that contributes to the central circadian pacemaker, was found to play an important role in maintaining the circadian rhythms of LC opsin mRNA expression. In zebrafish embryos, in which the translation of Clock was inhibited by anti-Clock morpholinos, the circadian rhythms of LC opsin mRNA expression diminished. CLOCK may regulate the circadian rhythms of LC opsin mRNA expression via cyclic adenosine monophosphate (cAMP)-dependent signaling pathways. In control retinas, the concentration of cAMP was high in the early morning and low in the remainder of the day and night. Inhibition of Clock translation abolished the fluctuation in the concentration of cAMP, thereby diminishing the circadian rhythms of opsin mRNA expression. Transient increase of cAMP concentrations in the early morning (i.e. by treating the embryos with 8-bromo-cAMP) restored the circadian rhythms of LC opsin mRNA expression in morpholino-treated embryos. Together, the data suggest that Clock plays important roles in regulating the circadian rhythms in photoreceptor cells.

Indexed as

AnimalsCircadian RhythmCLOCK ProteinsCyclic AMPGene Expression RegulationPhotoreceptor CellsRNA, MessengerRod OpsinsTrans-ActivatorsZebrafishCLOCK ProteinsCyclic AMPRNA, MessengerRod OpsinsTrans-Activators

Identifiers

PMID18687681
PMCPMC2581545
OpenAlexW1990849545

What OpenQuestion holds

Textmetadata
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.