Evidence map›Paper›PMID 34968386›Full record

ArticlePLoS biology2021

Ultradian rhythms of AKT phosphorylation and gene expression emerge in the absence of the circadian clock components Per1 and Per2.

Rona Aviram, Vaishnavi Dandavate, Gal Manella, Marina Golik, Gad Asher

Open access · goldAbstract read
In one paragraph

Article in PLoS biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
2.1field-weighted citation impact, top 13% 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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Bioinformatics advances · 2026
    Article
  6. Article
  7. Circadian Control of Protein Synthesis.BioEssays : news and reviews in molecular, cellular and developmental biology · 2025
    Review
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  9. Review
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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

5 authors at 1 institution in 1 country.

Rona AviramDepartment of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel.
Vaishnavi DandavateDepartment of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel.
Gal ManellaDepartment of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel.ORCID 0000-0002-2642-3568
Marina GolikDepartment of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel.ORCID 0000-0001-8384-1582
Gad AsherDepartment of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel.ORCID 0000-0001-9403-7856
Weizmann Institute of Science · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Rhythmicity of biological processes can be elicited either in response to environmental cycles or driven by endogenous oscillators. In mammals, the circadian clock drives about 24-hour rhythms of multitude metabolic and physiological processes in anticipation to environmental daily oscillations. Also at the intersection of environment and metabolism is the protein kinase-AKT. It conveys extracellular signals, primarily feeding-related signals, to regulate various key cellular functions. Previous studies in mice identified rhythmicity in AKT activation (pAKT) with elevated levels in the fed state. However, it is still unknown whether rhythmic AKT activation can be driven through intrinsic mechanisms. Here, we inspected temporal changes in pAKT levels both in cultured cells and animal models. In cultured cells, pAKT levels showed circadian oscillations similar to those observed in livers of wild-type mice under free-running conditions. Unexpectedly, in livers of Per1,2-/- but not of Bmal1-/- mice we detected ultradian (about 16 hours) oscillations of pAKT levels. Importantly, the liver transcriptome of Per1,2-/- mice also showed ultradian rhythms, corresponding to pAKT rhythmicity and consisting of AKT-related genes and regulators. Overall, our findings reveal ultradian rhythms in liver gene expression and AKT phosphorylation that emerge in the absence of environmental rhythms and Per1,2-/- genes.

Indexed as

AnimalsCells, CulturedCircadian ClocksGene ExpressionGene Expression RegulationLiverMaleMiceMice, Inbred C57BLPeriod Circadian ProteinsPhosphorylationProto-Oncogene Proteins c-aktTranscription FactorsTranscriptomeUltradian RhythmPer1 protein, mousePer2 protein, mousePeriod Circadian ProteinsProto-Oncogene Proteins c-aktTranscription Factors

Identifiers

PMID34968386
PMCPMC8718012
OpenAlexW4200456620

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.