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Enzalutamide

Phase 2

Breast Cancer | Small molecule | Oncology |United Therapeutics Corporation|Last Updated: Jul 9, 2025

Target and mechanism

Molecular targetAR
Target classAntagonist
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedPLACEBO_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment61

FDA Designations

No designations recorded

Clinical trial landscape

Enzalutamide · 1 trial · 1 indication

Phase 2 1
NCT02955394Preoperative Fulvestrant With or Without Enzalutamide in ER+/Her2- Breast CancerBreast Cancer
ACTIVE NOT_RECRUITING61 Analytics
PHASE2ACTIVE NOT_RECRUITING
Preoperative Fulvestrant With or Without Enzalutamide in ER+/Her2- Breast Cancer
Breast CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Patients With a PEPI Score Equal to Zero at Post Treatment
16 Weeks

The preoperative endocrine prognostic index (PEPI) is a validated measure of pathologic response to endocrine therapy. It is a model that combines estrogen receptor (ER) level, pathologic tumor site, nodal status, and Ki67 score at the time of surgery to predict subsequent risk of cancer recurrence. PEPI scoring is typically discretized into three risk groups: 0 (low risk of recurrence and best outcome), 1-3 (intermediate risk), and \>= 4 (high risk). This study was concerned only with the distinction between zero and non-zero PEPI scores. Zero is the minimum score, and there is no maximum score. Lower scores are better.

Secondary Endpoints

Disease-free Survival
15 months
Correlation Between PEPI Score and Disease-free Survival, Clinical Benefit Rate, and Overall Response Rate
4 years
Androgen Receptor (AR) Expression
16 Weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Fulvestrant Without EnzalutamidePLACEBO_COMPARATOR500 mg of Fulvestrant will be given IM on days 1, 15, 28, then every 4 weeks as per standard of care (SOC)
Fulvestrant With EnzalutamideEXPERIMENTAL500 mg of Fulvestrant will be given IM on days 1, 15, 28, then every 4 weeks as per standard of care (SOC), plus160mg of Enzalutamide will be given daily.

Interventions

NameTypeDescription
EnzalutamideDRUG160mg of Enzalutamide will be given daily in conjunction with Fulvestrant.
FulvestrantDRUG500mg Fulvestrant will be given IM on days 1, 15, 28, then every 4 weeks as per standard of care (SOC)
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Eligibility Criteria

Age Range18 Years to 101 Years
SexFEMALE
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: * ER+ Her2- breast cancer * Stage at least T2 or greater * Planned to get local surgery * Postmenopausal, or if pre- or peri- menopausal, then will need to have concurrent ovarian suppression. * At least 18 years of age * Not on anticoagulants * PS 0-2 * Able to swallow study dr...

Countries:United States
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Competitive Landscape -Breast Cancer 402 trials

Top 20 of 92 competitors

CompanyTickerTrialsLead PhaseDrugs
AstraZeneca PLCAZN47PHASE3Fulvestrant, Capivasertib
Merck & Co., Inc.MRK12PHASE3Pembrolizumab, Paclitaxel, Doxorubicin, Epirubicin, Cyclophosphamide
Eli Lilly and CompanyLLY27PHASE3Abemaciclib, Standard Adjuvant Endocrine Therapy
BioNTech SE Sponsored ADRBNTX7PHASE3DB-1303/BNT323, T-DM1
Gilead Sciences, Inc.GILD13PHASE3Sacituzumab Govitecan-hziy, Eribulin, Capecitabine Product, Gemcitabine, Vinorelbine
Novartis AG Sponsored ADRNVS30PHASE3Ribociclib
Pfizer Inc.PFE34PHASE3ARV-471, Fulvestrant
BeOne Medicines Ltd. Sponsored ADRONC5PHASE3BGB-43395, Letrozole, Abemaciclib, Palbociclib, Ribociclib
Olema Pharmaceuticals, Inc.OLMA5PHASE3Palazestrant, Fulvestrant, Anastrozole, Letrozole, Exemestane
Jazz Pharmaceuticals Public Limited CompanyJAZZ3PHASE3Zanidatamab, Trastuzumab, Eribulin, Vinorelbine, Gemcitabine
Celcuity Inc.CELC3PHASE3Gedatolisib, Palbociclib, Fulvestrant, Alpelisib
Relay Therapeutics, Inc.RLAY2PHASE3Zovegalisib, Capivasertib, Fulvestrant
GSK plc Sponsored ADRGSK2PHASE3Niraparib
Greenwich LifeSciences, Inc.GLSI1PHASE3GLSI-100
Bristol-Myers Squibb CompanyBMY5PHASE2Iza-bren, Nab-paclitaxel, Paclitaxel, Capecitabine, Carboplatin
BriaCell Therapeutics CorpBCTX2PHASE3SV-BR-1-GM, Cyclophosphamide, Interferon infiltration of the inoculation site, Retifanlimab, Treatment of Physician's Choice
Incyte CorporationINCY4PHASE2Ruxolitinib, Capecitabine, Regorafenib
Natera, Inc.NTRA3PHASE2Discontinuation of the anti-HER2 maintenance therapy
Puma Biotechnology, Inc.PBYI3PHASE2Neratinib, Loperamide, Colesevelam
Atossa Therapeutics, Inc.ATOS1PHASE2endoxifen, goserelin
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Frequently asked questions about Enzalutamide

What is Enzalutamide used for in breast cancer?

Enzalutamide is being studied for the treatment of breast cancer, specifically in patients with ER+/HER2- breast cancer. It is currently in Phase 2 clinical development as a preoperative therapy, given with or without fulvestrant. The drug is being evaluated in a clinical trial enrolling female patients aged 18 years and older.

What does Enzalutamide target?

Enzalutamide is a small molecule that targets the androgen receptor. It works by blocking the androgen receptor signaling pathway, which is relevant in certain types of breast cancer. This mechanism is being investigated in the context of ER+/HER2- breast cancer, where androgen receptor activity may play a role in tumor growth.

Who is developing Enzalutamide for breast cancer?

Enzalutamide is being developed by United Therapeutics Corporation, a company traded under the ticker UTHR. The company is conducting a Phase 2 clinical trial to evaluate the drug as a preoperative treatment for ER+/HER2- breast cancer. The trial is active but not recruiting participants.

What phase is Enzalutamide in for breast cancer?

Enzalutamide is in Phase 2 clinical development for breast cancer. It is being studied as a preoperative therapy in combination with fulvestrant or as a single agent. The drug is investigational and has not been approved for this indication. The ongoing trial is active but not recruiting, with a planned enrollment of 61 participants.

What clinical trials is Enzalutamide in for breast cancer?

Enzalutamide is being evaluated in a Phase 2 clinical trial with the identifier NCT02955394. The trial is titled 'Preoperative Fulvestrant With or Without Enzalutamide in ER+/Her2- Breast Cancer' and is being conducted in the United States. The study is active but not recruiting, with an enrollment of 61 female patients.

Is Enzalutamide the same as Xtandi?

Enzalutamide is the generic name for the drug also known as Xtandi. In the context of breast cancer, it is being studied under the name Enzalutamide. The drug is a small molecule androgen receptor inhibitor. It is currently in Phase 2 trials for breast cancer, developed by United Therapeutics Corporation.