Efficacy Evaluation of Enobosarm Monotherapy in Treatment of AR+/ER+/HER2- Metastatic Breast Cancer

Metastatic Breast Cancer Clinical Trial

— ARTEST  

Official title:

Randomized Crossover Ph3 to Evaluate Efficacy/Safety of Enobosarm Monotherapy vs Active Control for Treatment of AR+/ER+/HER2- MBC With AR Staining Previously Treated w/Nonsteroidal Aromatase Inhibitor, SERD & CDK 4/6 Inhibitor

Clinical Trial Details — Status: Terminated

Administrative data

• NCT number: NCT04869943
• Other study ID #: V3002401
• Status: Terminated
• Phase: Phase 3
• Start date: October 12, 2021
• Est. completion date: January 9, 2024

Study information

• Verified date: January 2024
• Source: Veru Inc.
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

To demonstrate the efficacy of enobosarmin the treatment of androgen receptor positive (AR+) and estrogen receptor positive (ER+) metastatic breast cancer (MBC) as measured by radiographic progression free survival (rPFS).

Description:

This study is a multicenter, randomized, open-label, two treatment arm, efficacy and safety study, comprised of two sections, the main study and the post-study extension period. Subjects will be randomized to the two treatment arms in a 1:1 fashion (into the main study), with the opportunity for subjects initially randomized to the Control Treatment Group to cross over to receive the investigational treatment in the post-study extension period.

The primary efficacy endpoint of the study will be the median rPFS. Subjects will continue study treatment until disease progression confirmed by blinded independent central reader (BICR) is observed. A safety follow up visit will occur approximately 30 days after last dose of study drug. Thereafter, survival follow up will be completed monthly for one year. Survival follow up may be completed by phone or records review. After one year, survival follow up will be completed every 90 days.

After radiographic progression (by RECIST 1.1) is confirmed by blinded independent central reader (BICR) and have received approval from Medical Monitor, subjects in the Control Treatment Group may be crossed over to receive enobosarm treatment (9mg per day). Treatment will continue in this population (Enobosarm Post-study Group (EPG)) until radiographic progression (by RECIST 1.1), confirmed by BICR, is observed. The efficacy database for this crossover group will be completely separate from the main portion of the study and the data will be analyzed separately.

Recruitment information / eligibility

• Status: Terminated
• Enrollment: 52
• Est. completion date: January 9, 2024
• Est. primary completion date: January 9, 2024
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 100 Years

Eligibility

Inclusion Criteria:

• Provide informed consent

• Be able to communicate effectively with the study personnel

• Aged =18 years

• For Female Subjects

• Menopausal status

• Be postmenopausal as defined by the National Comprehensive Cancer Network as either:

• Age =55 years and one year or more of amenorrhea

• Age <55 years and one year or more of amenorrhea, with an estradiol assay <20 pg/mL

• Age <55 years and surgical menopause with bilateral oophorectomy

• Be premenopausal or perimenopausal on ovarian suppression with LHRH agonist for at least 4 months, with an estradiol assay <20 pg/mL and a negative urine pregnancy test.

• If subject is of child bearing potential, the subject must agree to use acceptable methods of contraception:

• If female study participant could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6 months following administration of the last dose of study medication. Acceptable methods of contraception are as follows: Condom with spermicidal foam/gel/film/cream/suppository [i.e., barrier method of contraception], surgical sterilization of male partner (vasectomy with documentation of azoospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}

• If female study participant has undergone documented tubal ligation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) should also be used

• If female study participant has undergone documented placement of an intrauterine device (IUD) or intrauterine system (IUS), a barrier method (condom with spermicidal foam/gel/film/cream/suppository) should also be used

• For Male Subjects

• Subject must agree to use acceptable methods of contraception:

• If the study subject's partner could become pregnant, use acceptable methods of contraception from the time of the first administration of study medication until 6 months following administration of the last dose of study medication. Acceptable methods of contraception are as follows: Condom with spermicidal foam/gel/ film/cream/suppository [i.e., barrier method of contraception], surgical sterilization (vasectomy with documentation of azoospermia) and a barrier method {condom used with spermicidal foam/gel/film/cream/suppository}, the female partner uses oral contraceptives (combination estrogen/progesterone pills), injectable progesterone or subdermal implants and a barrier method (condom used with spermicidal foam/gel/film/cream/suppository)

• If female partner of a study subject has undergone documented tubal ligation (female sterilization), a barrier method (condom used with spermicidal foam/gel/film/cream/suppository) should also be used

• If female partner of a study subject has undergone documented placement of an intrauterine device (IUD) or intrauterine system (IUS), a barrier method (condom with spermicidal foam/gel/film/cream/suppository) should also be used

• Eastern Cooperative Oncology Group (ECOG) performance status of =2

• Documented evidence of ER+/HER2- metastatic breast cancer

• Measurable disease is required as per RECIST 1.1 (NOTE: Bone only metastatic disease is acceptable but requires a measurable component

• Have androgen receptor nuclei staining =40% as assessed by central laboratory

• Received at least 2 prior lines of treatment in MBC setting which must have included both an AI (monotherapy or combination) and fulvestrant (monotherapy or combination); at least one must have been given in combination with a CDK 4/6 inhibitor.

• Previously responded (without disease progression for at least 6 months) to one of the following treatments: fulvestrant monotherapy or fulvestrant plus CDK 4/6 inhibitor or nonsteroidal aromatase inhibitor monotherapy or nonsteroidal aromatase inhibitor plus CDK 4/6 inhibitor for metastatic breast cancer.

• Subject is willing to comply with the requirements of the protocol through the end of the study

Exclusion Criteria:

• Known hypersensitivity or allergy to enobosarm

• Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >2.5 X upper limit of normal (ULN) or total bilirubin >ULN (an elevated total bilirubin up to 1.5 X ULN attributed to a previously confirmed diagnosis of Gilbert's disease is acceptable if all other eligibility criteria are met). In patients with documented metastases to the liver, the limits for inclusion are ALT or AST >5.0 X ULN or total bilirubin >1.5 X ULN.

• Patients with biliary catheter.

• Creatinine clearance < 30 mL/min as measured using the Cockcoft Gault formula (patients with mild and moderate renal failure are not excluded from participation in this study)

• Previously received >1 course of systemic chemotherapy (not including immunotherapies or targeted therapies) for the treatment of metastatic breast cancer.

Note: Subjects may have received 1 course of chemotherapy in the adjuvant or neoadjuvant setting would not count as a line of therapy.

• Subjects with radiographic evidence of central nervous system (CNS) metastases as assessed by CT or MRI that are not well-controlled (symptomatic or requiring control with continuous corticosteroid therapy [e.g., dexamethasone]) Note: Subjects with CNS metastases are permitted to participate in the study if the CNS metastases are medically well-controlled and stable for at least 30 days after receiving local therapy (irradiation, surgery, etc.)

• Radiotherapy within 14 days prior to randomization except in case of localized radiotherapy for analgesic purpose or for lytic lesions at risk of fracture, which can then be completed within 7 days prior to randomization. Subjects must have recovered from radiotherapy toxicities prior to randomization

• Any comorbid disease or condition (medical or surgical) which might compromise the hematologic, cardiovascular, endocrine, pulmonary, severe renal impairment, gastrointestinal, hepatic, or central nervous system; or other conditions that may interfere with the absorption, distribution, metabolism or excretion of study drug, or would place the subject at increased risk

• Treatment with any investigational product within < 4 half-lives for each individual investigational product OR within 30 days prior to randomization

• Major surgery within 30 days prior to randomization

• Treatment with testosterone, methyltestosterone, oxandrolone (Oxandrin®), oxymetholone, danazol, fluoxymesterone (Halotestin®), testosterone-like agents (such as dehydroepiandrosterone, androstenedione, and other androgenic compounds, including herbals), or antiandrogens (enzalutamide, abiraterone, bicalutamide, apalutamide, or darolutamide). Previous therapy with testosterone and testosterone-like agents is acceptable with a 30-day washout (if previous testosterone therapy was long term depot within the past 6 months, the site should contact the Medical Monitor) or any other androgenic agent.

• Treatment with any of the following hormone replacement therapies for metastatic breast cancer. Prior use in the adjuvant or neoadjuvant setting is allowed if the treatment is, discontinued greater than 30 days prior to randomization

• Estrogens

• Megesterol acetate

• Testosterone

• All other concurrent anticancer treatments (including, but not limited to, all SERMs unless randomized to the Control Treatment Group with a SERM as the control treatment, AIs unless randomized to Control Treatment Group (exemestane or exemestane plus everolimus) with the AI containing treatment as the control treatment, and all CDK 4/6 inhibitors)

• An abnormal ECG result which, based on the investigator's clinical judgment, would place the subject at increased risk

• Has a known additional, invasive, malignancy that is progressing or required active treatment in the last 5 years [note: subjects with basal cell carcinoma of the skin, squamous cell carcinoma of the skin, ductal breast carcinoma in situ, bladder cancer (superficial treated), or cervical carcinoma in situ that have undergone potentially curative therapy are not excluded]

• Pregnant, lactating, or breastfeeding, or intending to become pregnant during the study or within 60 days after the final dose of study treatment

Related Conditions & MeSH terms

• Breast Neoplasms
• Metastatic Breast Cancer

Intervention

Drug:
• Enobosarm
Oral Enobosarm 9mg per day
• Exemestane
Exemestane monotherapy, exemestane plus everolimus, or selective estrogen receptor modulator (SERM)

Locations

Country	Name	City	State
Poland	Instytut Centrum Zdrowia Matki Polki	Lódz
Poland	Wojewódzka Przychodnia Onkologiczna, Wojewódzkie Wielospecjalistyczne Centrum Onkologii i Traumatologii im. M. Kopernika w Lodzi	Lódz
Poland	Centrum Onkologii Ziemi Lubelskiej im. sw. Jana z Dukli	Lublin
Poland	Specjalistyczny Szpital Onkologiczny NU-MED	Maków Mazowiecki
Poland	"Oddzial Onkologii Klinicznej i Chemioterapii Europejskie Centrum Zdrowia Otwock"	Otwock
Poland	Klinika Nowotworów Piersi i Chirurgii Rekonstrukcyjnej, Narodowy Instytut Onkologii im. Marii Sklodowskiej-Curie Panstwowy Instytut Badawczy	Warsaw
Spain	A Coruña University Hospital	A Coruña
Spain	Hospital Universitari Dexeus	Barcelona
Spain	Hospital Universitari Vall d'Hebron - Vall d'Hebron Institut d'Oncologia (VHIO)	Barcelona
Spain	Institut Catala d'Oncologia (ICO)	Barcelona
Spain	Hospital Universitari Arnau de Vilanova de Lleida	Lleida
Spain	Hospital Ruber Internacional	Madrid
Spain	Hospital Universitario 12 de Octubre (H12O)	Madrid
Spain	Hospital Universitario HM Sanchinarro	Madrid
Spain	Hospital Clínico Universitario de Valencia (CHUV)	Valencia
Ukraine	Municipal Institution "Dnipropetrovsk City Multi-field Clinical Hospital #4", Dnepropetrovsk state m	Dnepropetrovsk
Ukraine	State institution "V.T. Zaycev Institute of general and urgent surgery of National academy medical sciences of Ukraine"	Kharkiv
Ukraine	Khmelnytsky Regional Antitumor Center, Department of Breast, Skin, Soft Tissues and Bones Tumorsa	Khmelnytskyi
Ukraine	Kyiv City Clinical Oncology Center	Kyiv
Ukraine	Odessa Regional Oncological Dispensary	Odessa
United States	University Cancer & Blood Center	Athens	Georgia
United States	Dana-Farber Cancer Institute Breast Oncology	Boston	Massachusetts
United States	Ironwood Cancer and Research Centers	Chandler	Arizona
United States	The Lindner Center for Research and Education at the Christ Hospital	Cincinnati	Ohio
United States	Morton Plant Hospital/ BayCare Health System, Inc	Clearwater	Florida
United States	Texas Oncology Sammons Cancer Center	Dallas	Texas
United States	Rocky Mountain Cancer Centers	Denver	Colorado
United States	Astera Cancer Care	East Brunswick	New Jersey
United States	Virginia Cancer Specialists	Fairfax	Virginia
United States	Banner Health/ Banner MD Anderson Cancer Center	Gilbert	Arizona
United States	The Oncology Insitute of Hope and Innovation	Glendale	California
United States	Marin Cancer Care, Inc.	Greenbrae	California
United States	Tennessee Cancer Specialists	Knoxville	Tennessee
United States	Comprehensive Cancer Centers of Nevada	Las Vegas	Nevada
United States	California Research Institute (CRI)	Los Angeles	California
United States	Miami Cancer Institute	Miami	Florida
United States	University of Miami- Sylvester Comprehensive Cancer Center	Miami	Florida
United States	Inspira Medical Center Mullica Hill	Mullica Hill	New Jersey
United States	Tidelands Health	Murrells Inlet	South Carolina
United States	Baptist Clinical Research Institute	Nashville	Tennessee
United States	Virginia Oncology Associates	Norfolk	Virginia
United States	Woodlands Medical Specialists, PA	Pensacola	Florida
United States	Magee-Women's Hospital	Pittsburgh	Pennsylvania
United States	Miami Cancer Institute, Plantation MCIP	Plantation	Florida
United States	MultiCare Institute for Research and Innovation	Puyallup	Washington
United States	Blessing Corporate Services	Quincy	Illinois
United States	Oncology and Hematology Associates of Southwest Virginia, Inc.	Roanoke	Virginia
United States	University of California San Francisco Comprehensive Cancer Center	San Francisco	California
United States	Providence Medical Group	Santa Rosa	California
United States	MBCCOP - LSU Health Sciences Center	Shreveport	Louisiana
United States	Cancer Care Northwest	Spokane	Washington
United States	MultiCare Institute for Research and Innovation	Spokane	Washington
United States	Texas Oncology - Tyler	Tyler	Texas
United States	Inspira Medical Center	Vineland	New Jersey

Sponsors (1)

Lead Sponsor	Collaborator
Veru Inc.

Countries where clinical trial is conducted

United States,  Poland,  Spain,  Ukraine, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	To demonstrate the efficacy of Enobosarm in the treatment of androgen receptor positive (AR+) and estrogen receptor positive (ER+) metastatic breast cancer (MBC) as measured by radiographic progression free survival (rPFS).	The primary endpoint for the study is the median radiographic progression free survival (rPFS) in the Enobosarm Treatment Group compared to the Control Treatment Group.; Progression will be defined based on RECIST 1.1.	Day 120
Secondary	Objective Response Rate (ORR)	Objective Response Rate (ORR), proportion of subjects with a best tumor response of ORR (PR or CR) on study	Day 180