Evidence map›Paper›PMID 34784791›Full record

ArticleOpen biology2021

Palbociclib-mediated cell cycle arrest can occur in the absence of the CDK inhibitors p21 and p27.

Betheney R Pennycook, Alexis R Barr

Open access · goldAbstract read
In one paragraph

Article in Open biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
5.4field-weighted citation impact, top 3% 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

28 citing papers in PubMed, 47 citations in OpenAlex.

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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

2 authors at 1 institution in 1 country.

Betheney R PennycookInstitute of Clinical Sciences, Faculty of Medicine, Imperial College London, Du Cane Road, London W12 0NN, UK.ORCID 0000-0001-5721-6994
Alexis R BarrInstitute of Clinical Sciences, Faculty of Medicine, Imperial College London, Du Cane Road, London W12 0NN, UK.ORCID 0000-0002-6684-8114
MRC London Institute of Medical Sciences · GB

Funding

Cancer Research UK 25729Cancer Research UK C63833/A25729Medical Research Council MC_UP_1605/8
6 · The paper itself

Abstract

The use of CDK4/6 inhibitors in the treatment of a wide range of cancers is an area of ongoing investigation. Despite their increasing clinical use, there is limited understanding of the determinants of sensitivity and resistance to these drugs. Recent data have cast doubt on how CDK4/6 inhibitors arrest proliferation, provoking renewed interest in the role(s) of CDK4/6 in driving cell proliferation. As the use of CDK4/6 inhibitors in cancer therapies becomes more prominent, an understanding of their effect on the cell cycle becomes more urgent. Here, we investigate the mechanism of action of CDK4/6 inhibitors in promoting cell cycle arrest. Two main models explain how CDK4/6 inhibitors cause G1 cell cycle arrest, which differ in their dependence on the CDK inhibitor proteins p21 and p27. We have used live and fixed single-cell quantitative imaging, with inducible degradation systems, to address the roles of p21 and p27 in the mechanism of action of CDK4/6 inhibitors. We find that CDK4/6 inhibitors can initiate and maintain a cell cycle arrest without p21 or p27. This work clarifies our current understanding of the mechanism of action of CDK4/6 inhibitors and has implications for cancer treatment and patient stratification.

Indexed as

Cell LineCyclin-Dependent Kinase Inhibitor p21Cyclin-Dependent Kinase Inhibitor p27G1 Phase Cell Cycle CheckpointsGene Expression ProfilingGene Expression RegulationHumansMCF-7 CellsPiperazinesPyridinesRetinal Pigment EpitheliumSingle-Cell AnalysisCDKN1A protein, humanCDKN1B protein, humanCyclin-Dependent Kinase Inhibitor p21Cyclin-Dependent Kinase Inhibitor p27palbociclibPiperazinesPyridinescancer biologycell cyclecyclin-dependent kinasesproliferation

Identifiers

PMID34784791
PMCPMC8596008
OpenAlexW3212919263

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.