Evidence map›Paper›PMID 24626186›Full record

ArticleCell cycle (Georgetown, Tex.)2014

Partial inhibition of Cdk1 in G 2 phase overrides the SAC and decouples mitotic events.

Rachael A McCloy, Samuel Rogers, C Elizabeth Caldon, Thierry Lorca, Anna Castro, Andrew Burgess

Open access · bronzeAbstract read
In one paragraph

Article in Cell cycle (Georgetown, Tex.), 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 518 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
518citing papers in PubMed, 1 pooled it
36.2field-weighted citation impact, top 1% 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

518 citing papers in PubMed, 1 synthesis or guideline pooled it, 878 citations in OpenAlex.

  1. Pooled it
  2. Trial
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458 more citing papers are in PubMed but not listed here.

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 4 institutions in 3 countries.

Rachael A McCloyThe Kinghorn Cancer Centre; Garvan Institute of Medical Research; Sydney, New South Wales, Australia.
Samuel RogersThe Kinghorn Cancer Centre; Garvan Institute of Medical Research; Sydney, New South Wales, Australia.
C Elizabeth CaldonThe Kinghorn Cancer Centre; Garvan Institute of Medical Research; Sydney, New South Wales, Australia; St. Vincent's Clinical School; Faculty of Medicine; UNSW; Sydney, New South Wales, Australia.
Thierry LorcaUniversités Montpellier 2 et 1; Centre de Recherche de Biochimie Macromoléculaire; CNRS UMR 5237; Montpellier, France.
Anna CastroUniversités Montpellier 2 et 1; Centre de Recherche de Biochimie Macromoléculaire; CNRS UMR 5237; Montpellier, France.
Andrew BurgessThe Kinghorn Cancer Centre; Garvan Institute of Medical Research; Sydney, New South Wales, Australia; St. Vincent's Clinical School; Faculty of Medicine; UNSW; Sydney, New South Wales, Australia.
Centre National de la Recherche Scientifique · FRFaculty (United Kingdom) · GBGarvan Institute of Medical Research · AUThe Kinghorn Cancer Centre · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Entry and progression through mitosis has traditionally been linked directly to the activity of cyclin-dependent kinase 1 (Cdk1). In this study we utilized low doses of the Cdk1-specific inhibitor, RO3306 from early G 2 phase onwards. Addition of low doses of RO3306 in G 2 phase induced minor chromosome congression and segregation defects. In contrast, mild doses of RO3306 during G 2 phase resulted in cells entering an aberrant mitosis, with cells fragmenting centrosomes and failing to fully disassemble the nuclear envelope. Cells often underwent cytokinesis and metaphase simultaneously, despite the presence of an active spindle assembly checkpoint, which prevented degradation of cyclin B1 and securin, resulting in the random partitioning of whole chromosomes. This highly aberrant mitosis produced a significant increase in the proportion of viable polyploid cells present up to 3 days post-treatment. Furthermore, cells treated with medium doses of RO3306 were only able to reach the threshold of Cdk1 substrate phosphorylation required to initiate nuclear envelope breakdown, but failed to reach the levels of phosphorylation required to correctly complete pro-metaphase. Treatment with low doses of Okadaic acid, which primarily inhibits PP2A, rescued the mitotic defects and increased the number of cells that completed a normal mitosis. This supports the current model that PP2A is the primary phosphatase that counterbalances the activity of Cdk1 during mitosis. Taken together these results show that continuous and subtle disruption of Cdk1 activity from G 2 phase onwards has deleterious consequences on mitotic progression by disrupting the balance between Cdk1 and PP2A.

Indexed as

G2 PhaseMitosisCDC2 Protein KinaseCentrosomeCytokinesisHeLa CellsHumansOkadaic AcidPhosphorylationPolyploidyQuinolinesSpindle ApparatusThiazolesCDC2 Protein KinaseOkadaic AcidQuinolinesRO 3306ThiazolesCdk1cyclin B1mitosisPP2ARO3306SAC

Identifiers

PMID24626186
PMCPMC4050138
OpenAlexW2039879202

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.