Evidence map›Paper›PMID 27140928›Full record

ArticleClinical cancer research : an official journal of the American Association for Cancer Research2016

Targeting Androgen Receptor Activation Function-1 with EPI to Overcome Resistance Mechanisms in Castration-Resistant Prostate Cancer.

Yu Chi Yang, Carmen Adriana Banuelos, Nasrin R Mawji, Jun Wang, Minoru Kato, Simon Haile, Iain J McEwan, Stephen Plymate, Marianne D Sadar

Open access · greenAbstract read
In one paragraph

Article in Clinical cancer research : an official journal of the American Association for Cancer Research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 80 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
80citing papers in PubMed, 2 pooled it
9.7field-weighted citation impact, top 2% 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

80 citing papers in PubMed, 2 syntheses or guidelines pooled it, 107 citations in OpenAlex.

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20 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

9 authors at 1 institution in 1 country.

Yu Chi YangDepartment of Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada.
Carmen Adriana BanuelosDepartment of Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada.
Nasrin R MawjiDepartment of Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada.
Jun WangDepartment of Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada.
Minoru KatoDepartment of Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada.
Simon HaileDepartment of Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada.
Iain J McEwanSchool of Medical Sciences, University of Aberdeen, Aberdeen, Scotland.
Stephen PlymateDepartment of Medicine, University of Washington, Harborview Medical Center, Seattle, Washington.
Marianne D SadarDepartment of Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada. msadar@bcgsc.ca.
Harborview Medical Center · US

Funding

Novel compounds that inhibit transactivation of N-terminal domain of the androgenR01CA105304 · NCI · PROVINCIAL HEALTH SERVICES AUTHORITY · PI SADAR, MARIANNE D · 2004 to 2021
$3.7M
Chief Scientist Office ETM/258NCI NIH HHS R01 CA105304
6 · The paper itself

Abstract

purposePersistent androgen receptor (AR) transcriptional activity is clinically evident in castration-resistant prostate cancer (CRPC). Therefore, AR remains as a viable therapeutic target for CRPC. All current hormonal therapies target the C-terminus ligand-binding domain (LBD) of AR. By using EPI to target AR activation function-1 (AF-1), in the N-terminal domain that is essential for AR transactivation, we evaluate the ability of EPI to overcome several clinically relevant AR-related mechanisms of resistance. EXPERIMENTAL

designTo study the effect of EPI on AR transcriptional activity against overexpressed coactivators, such as SRC1-3 and p300, luciferase reporter assays were performed using LNCaP cells. AR-negative COS-1 cells were employed for reporter assays to examine whether the length of polyglutamine tract affects inhibition by EPI. The effect of EPI on constitutively active AR splice variants was studied in LNCaP95 cells, which express AR-V7 variant. To evaluate the effect of EPI on the proliferation of LNCaP95 cells, we performed in vitro BrdUrd incorporation assay and in vivo studies using xenografts in mice.

resultsEPI effectively overcame several molecular alterations underlying aberrant AR activity, including overexpressed coactivators, AR gain-of-function mutations, and constitutively active AR-V7. EPI inhibited AR transcriptional activity regardless of the length of polyglutamine tract. Importantly, EPI significantly inhibited the in vitro and in vivo proliferation of LNCaP95 prostate cancer cells, which are androgen independent and enzalutamide resistant.

conclusionsThese findings support EPI as a promising therapeutic agent to treat CRPC, particularly against tumors driven by constitutively active AR splice variants that are resistant to LBD-targeting drugs. Clin Cancer Res; 22(17); 4466-77. ©2016 AACRSee related commentary by Sharp et al., p. 4280.

Indexed as

Drug Resistance, NeoplasmAndrogen Receptor AntagonistsAnimalsApoptosisBenzhydryl CompoundsCell Line, TumorChlorocebus aethiopsChlorohydrinsCOS CellsDisease Models, AnimalGene Expression Regulation, NeoplasticHumansMaleMiceMutationProstatic Neoplasms, Castration-ResistantAndrogen Receptor AntagonistsBenzhydryl CompoundsChlorohydrinsEPI-506Receptors, Androgen

Identifiers

PMID27140928
PMCPMC5010454
OpenAlexW2345499901

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.