Evidence map›Paper›PMID 19166512›Full record

ArticleJournal of neurochemistry2009

Phosphatidylinositol 3 kinase-Akt signaling serves as a circadian output in the retina.

Michael L Ko, Kuihuan Jian, Liheng Shi, Gladys Y-P Ko

Open access · greenAbstract read
In one paragraph

Article in Journal of neurochemistry, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
1.7field-weighted citation impact, top 16% 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

29 citing papers in PubMed, 40 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Circadian regulation in the retina: From molecules to network.The European journal of neuroscience · 2020
    Review
  8. Article
  9. The Contribution of L-Type CaFrontiers in molecular neuroscience · 2017
    Article
  10. Review
  11. Cone Viability Is Affected by Disruption of Melatonin Receptors Signaling.Investigative ophthalmology & visual science · 2016
    Article
  12. Article
  13. High-Fat Diet-Induced Retinal Dysfunction.Investigative ophthalmology & visual science · 2015
    Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
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

4 authors at 1 institution in 1 country.

Michael L KoDepartment of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA.
Kuihuan Jian
Liheng Shi
Gladys Y-P Ko
Texas A&M University · US

Funding

WASTE SITE ASSESSMENTP42ES004917 · NIEHS · TEXAS A&M UNIVERSITY SYSTEM · PI SAFE, STEPHEN H. · 1989 to 2009
$10.4M
Pilot--Health Science ResearchP30ES009106 · NIEHS · TEXAS A&M UNIVERSITY SYSTEM · PI SAFE, STEPHEN H. · 1998 to 2006
$9.2M
Circadian Rhythm In Cone Photoreceptors: Cellular MechanismsR01EY017452 · NEI · TEXAS A&M UNIVERSITY · PI KO, GLADYS Y · 2007 to 2012
$1.8M
ACQUISITION OF A CONFOCAL/MULTIPHOTON MICROSCOPY SYSTEMS10RR022532 · NCRR · TEXAS A&M UNIVERSITY · PI BURGHARDT, ROBERT C · 2006 to 2006
$499k
NCRR NIH HHS S10 RR022532NCRR NIH HHS S10RR022532NEI NIH HHS R01 EY017452NEI NIH HHS R01EY017452NIEHS NIH HHS P30 ES009106NIEHS NIH HHS P30ES009106NIEHS NIH HHS P42 ES004917NIEHS NIH HHS P42ES004917
6 · The paper itself

Abstract

The daily rhythm of L-type voltage-gated calcium channels (L-VGCCs) is part of the cellular mechanism underlying the circadian regulation of retina physiology and function. However, it is not completely understood how the circadian clock regulates L-VGCC current amplitudes without affecting channel gating properties. The phosphatidylinositol 3 kinase-protein kinase B (PI3K-Akt) signaling pathway has been implicated in many vital cellular functions especially in trophic factor-induced ion channel trafficking and membrane insertion. Here, we report that PI3K-Akt signaling participates in the circadian phase-dependent modulation of L-VGCCs. We found that there was a circadian regulation of Akt phosphorylation on Thr308 that peaked at night. Inhibition of PI3K or Akt significantly decreased L-VGCC current amplitudes and the expression of membrane-bound L-VGCCalpha1D subunit only at night but not during the subjective day. Photoreceptors transfected with a dominant negative Ras had significantly less expression of phosphorylated Akt and L-VGCCalpha1D subunit compared with non-transfected photoreceptors. Interestingly, both PI3K-Akt and extracellular signal-related kinase were downstream of Ras, and they appeared to be parallel and equally important pathways to regulate L-VGCC rhythms. Inhibition of either pathway abolished the L-VGCC rhythm indicating that there were multiple mechanisms involved in the circadian regulation of L-VGCC rhythms in retina photoreceptors.

Indexed as

AnimalsBiophysical PhenomenaBiotinylationCalcium Channels, L-TypeCells, CulturedChick EmbryoCircadian RhythmElectric StimulationEnzyme InhibitorsGene Expression RegulationMembrane PotentialsOncogene Protein v-aktPatch-Clamp TechniquesPhosphatidylinositol 3-KinasesProtein TransportRetinaCalcium Channels, L-TypeEnzyme InhibitorsOncogene Protein v-aktPhosphatidylinositol 3-Kinases

Identifiers

PMID19166512
PMCPMC2746019
OpenAlexW1993123079

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.