Clinical Trials Directory

Trials / Completed

CompletedNCT02971761

Pembrolizumab and Enobosarm in Treating Patients With Androgen Receptor Positive Metastatic Triple Negative Breast Cancer

A Phase 2 Clinical Trial of the Combination of Pembrolizumab and Selective Androgen Receptor Modulator (SARM) GTX-024 in Patients With Metastatic Androgen Receptor (AR) Positive Triple Negative Breast Cancer (TNBC)

Status
Completed
Phase
Phase 2
Study type
Interventional
Enrollment
18 (actual)
Sponsor
City of Hope Medical Center · Academic / Other
Sex
All
Age
18 Years
Healthy volunteers
Not accepted

Summary

This phase II trial studies the side effects and how well pembrolizumab and enobosarm work in treating patients with androgen receptor positive triple negative breast cancer that has spread to other places in the body (metastatic). Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Androgen can cause the growth of breast cancer cells. Hormone therapy using enobosarm may fight breast cancer by blocking the use of androgen by the tumor cells. Giving pembrolizumab and enobosarm may work better than pembrolizumab alone in treating patients with androgen receptor positive triple negative breast cancer.

Detailed description

PRIMARY OBJECTIVES: I. To evaluate the safety/tolerability of the combination regimen. II. To determine the response rate (complete response \[CR\] or partial response \[PR\] via Response Evaluation Criteria in Solid Tumors \[RECIST\] 1.1) of the combination of pembrolizumab with enobosarm (GTx-024) in patients with advanced androgen receptor (AR) positive (+) triple negative breast cancer (TNBC). SECONDARY OBJECTIVES: I. To evaluate clinical outcomes by RECIST 1.1 including clinical benefit rate (CBR) at 24 weeks, progression free-survival (PFS), duration of response (DOR), event free survival (EFS), time-to-treatment failure (TTF); and overall survival (OS). II. To evaluate the role of immune-related response criteria (irRECIST). III. To evaluate the association of AR by immunohistochemistry (IHC) and clinical response. EXPLORATORY OBJECTIVES: I. To evaluate the association of an AR gene expression signature and clinical response. II. To evaluate genomic and phenotypic status of breast tumor. III. To evaluate the effect of the combination therapy on peripheral blood circulating tumor cells (CTCs) and circulating tumor deoxyribonucleic acid (DNA) (ctDNA). IV. To evaluate the effect of combination therapy on tumor-derived exosomes (TEX) and TEX associated immune biomarkers. V. Immune correlatives: Va. To evaluate pre-treatment programmed death ligand 1 (PD-L1) and tumor infiltrating lymphocytes (TILs) as a predictor of response to combination therapy. Vb. To evaluate specific TIL subsets (e.g. CD4, CD8, regulatory T cell \[Treg\] distribution) and other immunological correlatives (e.g. T cell receptor \[TCR\] repertoire analysis) as possible predictors of response. Vc. To evaluate change in TILs as a result of the combination therapy. Vd. To evaluate peripheral blood, immune biomarkers. OUTLINE: Patients receive pembrolizumab intravenously (IV) over 30 minutes on day 1 and enobosarm orally (PO) once daily (QD) on days 1-21. Treatment repeats every 21 days for up to 35 cycles in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 and 90 days, every 3 months, and bi-annually.

Conditions

Interventions

TypeNameDescription
DRUGEnobosarmGiven PO
OTHERLaboratory Biomarker AnalysisCorrelative studies
BIOLOGICALPembrolizumabGiven IV

Timeline

Start date
2017-06-01
Primary completion
2020-10-28
Completion
2022-08-16
First posted
2016-11-23
Last updated
2024-02-20
Results posted
2022-06-10

Locations

7 sites across 1 country: United States

Regulatory

Source: ClinicalTrials.gov record NCT02971761. Inclusion in this directory is not an endorsement.