Evidence map›Paper›PMID 32669118›Full record

ArticleGenome medicine2020

ASXL3 bridges BRD4 to BAP1 complex and governs enhancer activity in small cell lung cancer.

Aileen Patricia Szczepanski, Zibo Zhao, Tori Sosnowski, Young Ah Goo, Elizabeth Thomas Bartom, Lu Wang

Open access · goldAbstract read
In one paragraph

Article in Genome medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
3.0field-weighted citation impact, top 8% 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

36 citing papers in PubMed, 60 citations in OpenAlex.

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  12. Additional Sex Combs-like Family Associated with Epigenetic Regulation.International journal of molecular sciences · 2024
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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 1 institution in 1 country.

Aileen Patricia SzczepanskiSimpson Querrey Center for Epigenetics, Northwestern University Feinberg School of Medicine, 303 East Superior Street, Chicago, IL, 60611, USA.
Zibo ZhaoSimpson Querrey Center for Epigenetics, Northwestern University Feinberg School of Medicine, 303 East Superior Street, Chicago, IL, 60611, USA.
Tori SosnowskiProteomics Center of Excellence, Northwestern University, 2145 North Sheridan Rd, Evanston, IL, 60208, USA.
Young Ah GooSimpson Querrey Center for Epigenetics, Northwestern University Feinberg School of Medicine, 303 East Superior Street, Chicago, IL, 60611, USA.
Elizabeth Thomas BartomSimpson Querrey Center for Epigenetics, Northwestern University Feinberg School of Medicine, 303 East Superior Street, Chicago, IL, 60611, USA.
Lu WangSimpson Querrey Center for Epigenetics, Northwestern University Feinberg School of Medicine, 303 East Superior Street, Chicago, IL, 60611, USA. lu.wang1@northwestern.edu.ORCID 0000-0003-0441-0747
Northwestern University · US

Funding

Tumor Environment and Metastasis (TEAM) Research ProgramP30CA060553 · NCI · NORTHWESTERN UNIVERSITY AT CHICAGO · PI LEONIDAS C. PLATANIAS · 1993 to 2026
$153.9M
TR&D 7: Cell Specific ProteomicsP41GM108569 · NIGMS · NORTHWESTERN UNIVERSITY · PI KELLEHER, NEIL L · 2015 to 2024
$13.6M
TRAINING PROGRAM IN SIGNAL TRANSDUCTION AND CANCERT32CA070085 · NCI · NORTHWESTERN UNIVERSITY AT CHICAGO · PI LEONIDAS C. PLATANIAS · 1997 to 2026
$5.7M
Bioinformatics Analysis of Next Generation Sequencing Data from Cancer CellsR50CA221848 · NCI · NORTHWESTERN UNIVERSITY AT CHICAGO · PI Elizabeth Thomas Bartom · 2017 to 2026
$1.8M
Acquisition of a Thermo Fisher Scientific Q Exactive UHMR mass spectrometerS10OD025194 · OD · NORTHWESTERN UNIVERSITY · PI COMPTON, PHILIP DANIEL · 2018 to 2018
$795k
NCI NIH HHS P30 CA060553NCI NIH HHS R50 CA221848NCI NIH HHS T32 CA070085NIGMS NIH HHS P41 GM108569NIH HHS S10 OD025194
6 · The paper itself

Abstract

backgroundSmall cell lung cancer (SCLC) is a more aggressive subtype of lung cancer that often results in rapid tumor growth, early metastasis, and acquired therapeutic resistance. Consequently, such phenotypical characteristics of SCLC set limitations on viable procedural options, making it difficult to develop both screenings and effective treatments. In this study, we examine a novel mechanistic insight in SCLC cells that could potentially provide a more sensitive therapeutic alternative for SCLC patients.

methodsBiochemistry studies, including size exclusion chromatography, mass spectrometry, and western blot analysis, were conducted to determine the protein-protein interaction between additional sex combs-like protein 3 (ASXL3) and bromodomain-containing protein 4 (BRD4). Genomic studies, including chromatin immunoprecipitation sequencing (ChIP-seq), RNA sequencing, and genome-wide analysis, were performed in both human and mouse SCLC cells to determine the dynamic relationship between BRD4/ASXL3/BAP1 epigenetic axis in chromatin binding and its effects on transcriptional activity.

resultsWe report a critical link between BAP1 complex and BRD4, which is bridged by the physical interaction between ASXL3 and BRD4 in an SCLC subtype (SCLC-A), which expresses a high level of ASCL1. We further showed that ASXL3 functions as an adaptor protein, which directly interacts with BRD4's extra-terminal (ET) domain via a novel BRD4 binding motif (BBM), and maintains chromatin occupancy of BRD4 to active enhancers. Genetic depletion of ASXL3 results in a genome-wide reduction of histone H3K27Ac levels and BRD4-dependent gene expression in SCLC. Pharmacologically induced inhibition with BET-specific chemical degrader (dBET6) selectively inhibits cell proliferation of a subtype of SCLC that is characterized with high expression of ASXL3.

conclusionsCollectively, this study provides a mechanistic insight into the oncogenic function of BRD4/ASXL3/BAP1 epigenetic axis at active chromatin enhancers in SCLC-A subtype, as well as a potential new therapeutic option that could become more effective in treating SCLC patients with a biomarker of ASXL3-highly expressed SCLC cells.

Indexed as

Enhancer Elements, GeneticBasic Helix-Loop-Helix ProteinsBromodomain Containing ProteinsCell Cycle ProteinsDrug DiscoveryGene Expression ProfilingGene Expression Regulation, NeoplasticGene Regulatory NetworksHumansLung NeoplasmsModels, BiologicalMultiprotein ComplexesPromoter Regions, GeneticProtein BindingRepressor ProteinsSmall Cell Lung CarcinomaASCL1 protein, humanASXL3 protein, humanBAP1 protein, humanBasic Helix-Loop-Helix ProteinsBRD4 protein, humanBromodomain Containing ProteinsCell Cycle ProteinsMultiprotein ComplexesRepressor ProteinsTranscription FactorsTumor Suppressor ProteinsUbiquitin ThiolesteraseASXL3BAP1 complexBET inhibitorsBRD4Enhancer activitySCLC

Identifiers

PMID32669118
PMCPMC7362484
OpenAlexW3042567621

What OpenQuestion holds

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LicenceCC BY
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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.