RECRUITING

Study of Belzutifan (MK-6482) Plus Fulvestrant for ER+/HER2- Metastatic Breast Cancer (MK-6482-029/LITESPARK-029)

Conditions

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Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

The purpose of this study is to assess the efficacy and safety of belzutifan (MK-6482) plus fulvestrant compared to everolimus plus endocrine therapy (ET) (investigator's choice of fulvestrant or exemestane) in adults with estrogen receptor-positive, human epidermal growth factor receptor 2-negative (ER+/HER2-) unresectable metastatic breast cancer. There is no formal hypothesis testing in this study.

Official Title

A Phase 2, Randomized, Active-controlled, Open-label, Multicenter Study of Belzutifan Plus Fulvestrant in Participants With Estrogen Receptor Positive, HER2 Negative Unresectable Locally Advanced or Metastic Breast Cancer After Progression on Previous Endocrine Therapy (LITESPARK-029)

Quick Facts

Study Start:2024-11-27

Study Completion:2028-10-07

Study Type:Not specified

Phase:Not Applicable

Enrollment:Not specified

Status:RECRUITING

Study ID

NCT06428396

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Ages Eligible for Study:18 Years

Sexes Eligible for Study:ALL

Accepts Healthy Volunteers:No

Standard Ages:ADULT, OLDER_ADULT

Inclusion Criteria	Exclusion Criteria
* Has a diagnosis of estrogen receptor positive (ER+)/human epidermal growth factor receptor negative (HER2-) invasive breast carcinoma that is either locally advanced disease not amenable to resection or metastatic disease not treatable with curative intent * Has documented radiographic confirmation of disease progression during or after the last administered endocrine therapy (ET) * Provides additional tissue from the same sample used to determine ER and HER2 status locally * Has received ET in the noncurative setting and has 1) Radiographic disease progression on 12 months or more of ET in combination with CDK4/6 inhibitor in the noncurative setting or 2) Received at least 2 lines of ET in the noncurative setting including CDK4/6 inhibitor where the CDK 4/6 inhibitor was discontinued due to intolerance * Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 assessed within 7 days of randomization * Participants who have AEs due to previous anticancer therapies must have recovered to ≤Grade 1 or baseline. Participants with endocrine-related AEs who are adequately treated with hormone replacement or participants who have ≤Grade 2 neuropathy are eligible * Participants who are hepatitis B surface antigen (HBsAg) positive are eligible if they have received hepatitis B virus (HBV) antiviral therapy for at least 4 weeks prior to the first dose of study intervention and have undetectable HBV viral load prior to randomization	* Has Breast cancer amenable to treatment with curative intent * Is unable to receive any of the endocrine therapies (ETs) (ie, fulvestrant or exemestane) * Has known difficulty in tolerating oral medications, unable to swallow orally administered medication, or conditions which would impair absorption of oral medications such as uncontrolled nausea or vomiting (ie, CTCAE =Grade 3 despite antiemetic therapy), ongoing gastrointestinal obstruction, motility disorder, malabsorption syndrome, or prior gastric bypass * Has advanced/metastatic, symptomatic visceral spread at risk of rapidly evolving into life-threatening complications * Has active, bleeding diathesis, or on oral anti-vitamin K medication * Has history of noninfectious pneumonitis/interstitial lung disease including radiation pneumonitis that required steroids or has current pneumonitis/interstitial lung disease * Has a known germline BRCA mutation (deleterious or suspected deleterious) and has received previous treatment with poly-ADP ribose polymerase (PARP) inhibition either in the adjuvant or metastatic setting * Has received prior fulvestrant in the adjuvant, unresectable locally advanced, or metastatic setting * Has received any line of cytotoxic chemotherapy or PARP inhibitor in the unresectable or noncurative advanced/metastatic setting * Has received prior radiotherapy for non-central nervous system (CNS) disease or required corticosteroids for radiation-related toxicities including radiation pneumonitis, within 14 days of the first dose of study intervention * Is currently receiving either a strong inhibitor or inducer of CYP3A4 that cannot be discontinued for the duration of the study * Has received prior systemic anticancer therapy including investigational agents within 4 weeks before randomization * Has received a live or live-attenuated vaccine within 30 days before the first dose of study intervention * Has concurrent active Hepatitis B and Hepatitis C virus infection * Has clinically significant cardiac disease, including unstable angina, acute myocardial infarction within 6 months from Day 1 of study medication administration, or New York Heart Association Class III or Class IV congestive heart failure * Has not adequately recovered from major surgery or have ongoing surgical complications

Inclusion Criteria

Exclusion Criteria

* Has a diagnosis of estrogen receptor positive (ER+)/human epidermal growth factor receptor negative (HER2-) invasive breast carcinoma that is either locally advanced disease not amenable to resection or metastatic disease not treatable with curative intent
* Has documented radiographic confirmation of disease progression during or after the last administered endocrine therapy (ET)
* Provides additional tissue from the same sample used to determine ER and HER2 status locally
* Has received ET in the noncurative setting and has 1) Radiographic disease progression on 12 months or more of ET in combination with CDK4/6 inhibitor in the noncurative setting or 2) Received at least 2 lines of ET in the noncurative setting including CDK4/6 inhibitor where the CDK 4/6 inhibitor was discontinued due to intolerance
* Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 assessed within 7 days of randomization
* Participants who have AEs due to previous anticancer therapies must have recovered to ≤Grade 1 or baseline. Participants with endocrine-related AEs who are adequately treated with hormone replacement or participants who have ≤Grade 2 neuropathy are eligible
* Participants who are hepatitis B surface antigen (HBsAg) positive are eligible if they have received hepatitis B virus (HBV) antiviral therapy for at least 4 weeks prior to the first dose of study intervention and have undetectable HBV viral load prior to randomization

* Has Breast cancer amenable to treatment with curative intent
* Is unable to receive any of the endocrine therapies (ETs) (ie, fulvestrant or exemestane)
* Has known difficulty in tolerating oral medications, unable to swallow orally administered medication, or conditions which would impair absorption of oral medications such as uncontrolled nausea or vomiting (ie, CTCAE =Grade 3 despite antiemetic therapy), ongoing gastrointestinal obstruction, motility disorder, malabsorption syndrome, or prior gastric bypass
* Has advanced/metastatic, symptomatic visceral spread at risk of rapidly evolving into life-threatening complications
* Has active, bleeding diathesis, or on oral anti-vitamin K medication
* Has history of noninfectious pneumonitis/interstitial lung disease including radiation pneumonitis that required steroids or has current pneumonitis/interstitial lung disease
* Has a known germline BRCA mutation (deleterious or suspected deleterious) and has received previous treatment with poly-ADP ribose polymerase (PARP) inhibition either in the adjuvant or metastatic setting
* Has received prior fulvestrant in the adjuvant, unresectable locally advanced, or metastatic setting
* Has received any line of cytotoxic chemotherapy or PARP inhibitor in the unresectable or noncurative advanced/metastatic setting
* Has received prior radiotherapy for non-central nervous system (CNS) disease or required corticosteroids for radiation-related toxicities including radiation pneumonitis, within 14 days of the first dose of study intervention
* Is currently receiving either a strong inhibitor or inducer of CYP3A4 that cannot be discontinued for the duration of the study
* Has received prior systemic anticancer therapy including investigational agents within 4 weeks before randomization
* Has received a live or live-attenuated vaccine within 30 days before the first dose of study intervention
* Has concurrent active Hepatitis B and Hepatitis C virus infection
* Has clinically significant cardiac disease, including unstable angina, acute myocardial infarction within 6 months from Day 1 of study medication administration, or New York Heart Association Class III or Class IV congestive heart failure
* Has not adequately recovered from major surgery or have ongoing surgical complications

Contacts and Locations

Study Contact

Toll Free Number

CONTACT

1-888-577-8839

Trialsites@msd.com

Principal Investigator

Medical Director

STUDY_DIRECTOR

Merck Sharp & Dohme LLC

Study Locations (Sites)

Northwest Georgia Oncology Centers, a Service of Wellstar Cobb Hospital ( Site 0011)

Marietta, Georgia, 30060

United States

CHRISTUS Highland ( Site 0005)

Shreveport, Louisiana, 71105

United States

Renown Regional Medical Center ( Site 0018)

Reno, Nevada, 89502

United States

Collaborators and Investigators

Sponsor: Merck Sharp & Dohme LLC

Medical Director, STUDY_DIRECTOR, Merck Sharp & Dohme LLC

Study Record Dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

Study Start Date2024-11-27

Study Completion Date2028-10-07

Study Record Updates

Study Start Date2024-11-27

Study Completion Date2028-10-07

Terms related to this study

Additional Relevant MeSH Terms

Metastatic Breast Cancer