Evidence map›Paper›PMID 26162914›Full record

ArticleEndocrine-related cancer2015

Evaluation of the pharmacological activities of RAD1901, a selective estrogen receptor degrader.

Suzanne E Wardell, Erik R Nelson, Christina A Chao, Holly M Alley, Donald P McDonnell

Open access · bronzeAbstract readEvaluation Study
In one paragraph

Article in Endocrine-related cancer, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed, 1 pooled it
4.7field-weighted citation impact, top 5% 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

61 citing papers in PubMed, 1 synthesis or guideline pooled it, 112 citations in OpenAlex.

  1. Pooled it
  2. Imlunestrant with or without abemaciclib in advanced breast cancer: updated efficacy results from the phase III EMBER-3 trial.Annals of oncology : official journal of the European Society for Medical Oncology · 2026
    Trial
  3. Trial
  4. Trial
  5. US Food and Drug Administration Approval Summary: Elacestrant for Estrogen Receptor-Positive, Human Epidermal Growth Factor Receptor 2-Negative,Journal of clinical oncology : official journal of the American Society of Clinical Oncology · 2024
    Trial
  6. Trial
  7. Trial
  8. Review
  9. Targeting Estrogen Receptor for Breast Cancer.Current issues in molecular biology · 2026
    Review
  10. Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Review
  16. Review
  17. Article
  18. Article
  19. Review
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1 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

5 authors at 2 institutions in 1 country.

Suzanne E WardellDepartment of Pharmacology and Cancer Biology Duke University School of Medicine, Box 3813, Durham, North Carolina 27710, USA.
Erik R NelsonDepartment of Pharmacology and Cancer Biology Duke University School of Medicine, Box 3813, Durham, North Carolina 27710, USA.
Christina A ChaoDepartment of Pharmacology and Cancer Biology Duke University School of Medicine, Box 3813, Durham, North Carolina 27710, USA.
Holly M AlleyDepartment of Pharmacology and Cancer Biology Duke University School of Medicine, Box 3813, Durham, North Carolina 27710, USA.
Donald P McDonnellDepartment of Pharmacology and Cancer Biology Duke University School of Medicine, Box 3813, Durham, North Carolina 27710, USA donald.mcdonnell@duke.edu.
Duke University · USUniversity of Illinois Urbana-Champaign · US

Funding

Mechanism of Action of Estrogens and AntiestrogensR37DK048807 · NIDDK · DUKE UNIVERSITY · PI MCDONNELL, DONALD P · 2005 to 2014
$5.0M
MECHANISM OF ESTROGENS AND ANTIESTROGENSR01DK048807 · NIDDK · DUKE UNIVERSITY · PI MCDONNELL, DONALD P · 1995 to 2019
$4.3M
NIDDK NIH HHS R01 DK048807NIDDK NIH HHS R37 DK048807NIDDK NIH HHS R37DK048807
6 · The paper itself

Abstract

Endocrine therapy, using tamoxifen or an aromatase inhibitor, remains a first-line treatment for estrogen receptor 1 (ESR1) positive breast cancer. However, tumor resistance limits the duration of response. The clinical efficacy of fulvestrant, a selective ER degrader (SERD) that triggers receptor degradation, has confirmed that ESR1 often remains engaged in endocrine therapy resistant cancers. Recently developed, selective ER modulators (SERMs)/SERD hybrids (SSHs) that facilitate ESR1 degradation in breast cancer cells and reproductive tissues have been advanced as an alternative treatment for advanced breast cancer, particularly in the metastatic setting. RAD1901 is one SSH currently being evaluated clinically that is unique among ESR1 modulators in that it readily enters the brain, a common site of breast cancer metastasis. In this study, RAD1901 inhibited estrogen activation of ESR1 in vitro and in vivo, inhibited estrogen-dependent breast cancer cell proliferation and xenograft tumor growth, and mediated dose-dependent downregulation of ESR1 protein. However, doses of RAD1901 insufficient to induce ESR1 degradation were shown to result in the activation of ESR1 target genes and in the stimulation of xenograft tumor growth. RAD1901 is an SSH that exhibits complex pharmacology in breast cancer models, having dose-dependent agonist/antagonist activity displayed in a tissue-selective manner. It remains unclear how this unique pharmacology will impact the utility of RAD1901 for breast cancer treatment. However, being the only SERD currently known to access the brain, RAD1901 merits evaluation as a targeted therapy for the treatment of breast cancer brain metastases.

Indexed as

AnimalsApoptosisBlotting, WesternCell ProliferationEstrogen Receptor alphaFemaleHumansImmunoenzyme TechniquesMiceMice, Inbred C57BLReal-Time Polymerase Chain ReactionReverse Transcriptase Polymerase Chain ReactionRNA, MessengerSelective Estrogen Receptor ModulatorsTumor Cells, CulturedUterine Cervical NeoplasmsEstrogen Receptor alphaRNA, MessengerSelective Estrogen Receptor Modulatorsendocrine-resistant breast cancerRAD1901selective estrogen receptor degraderSERM

Identifiers

PMID26162914
PMCPMC4545300
OpenAlexW2243467818

What OpenQuestion holds

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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.