Testing the Addition of Radium Therapy (Radium-223 Dichloride) to the Usual Chemotherapy Treatment (Paclitaxel) for Advanced Breast Cancer That Has Spread to the Bones

Summary

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Description

PRIMARY OBJECTIVE: I. To determine if the combination of radium Ra 223 dichloride (radium-223 dichloride) and paclitaxel improves progression-free survival (PFS) compared to paclitaxel alone. SECONDARY OBJECTIVES: I. To determine the time to the first symptomatic skeletal event [SSE] (defined as 1st...

PRIMARY OBJECTIVE: I. To determine if the combination of radium Ra 223 dichloride (radium-223 dichloride) and paclitaxel improves progression-free survival (PFS) compared to paclitaxel alone. SECONDARY OBJECTIVES: I. To determine the time to the first symptomatic skeletal event [SSE] (defined as 1st use of radiation therapy to relieve skeletal symptoms, new symptomatic pathologic vertebral or non-vertebral bone fractures, spinal cord compression, or tumor-related orthopedic surgical intervention). II. To measure the objective response rate (ORR). III. To determine the safety of radium-223 dichloride with paclitaxel. IV. To measure overall survival (OS). EXPLORATORY OBJECTIVES: I. To perform molecular profiling assays on malignant and normal tissues, including, but not limited to, whole exome sequencing (WES) and messenger ribonucleic (RNA) sequencing (RNAseq), in order to: Ia. Investigate if molecular alterations in deoxyribonucleic acid (DNA) repair genes are associated with response to radium-223 dichloride, and. Ib. Investigate if loss of heterozygosity in triple negative tumors is associated with response to radium-223 dichloride. II. To contribute genetic analysis data from de-identified biospecimens to Genomic Data Commons (GDC), a well annotated cancer molecular and clinical data repository, for current and future research; specimens will be annotated with key clinical data, including presentation, diagnosis, staging, summary treatment, and if possible, outcome. III. To correlate change in level of total alkaline phosphatase, bone-specific alkaline phosphatase, and serum osteocalcin to response to radium-223 dichloride therapy. IV. To examine the radium-223 dichloride bio-distribution and absorbed dose in each bone metastatic lesions as well as elsewhere in the body including critical organs using dosimetry. V. To bank formalin-fixed, paraffin-embedded (FFPE) tissue, blood, and nucleic acids obtained from patients at the Experimental Therapeutics Clinical Trials Network (ETCTN) Biorepository at Nationwide Children's Hospital. VI. To explore the symptomatic adverse events (AE) for tolerability of each treatment arm. OUTLINE: Patients are randomized to 1 of 2 arms. ARM I: Patients receive paclitaxel intravenously (IV) over 1 hour on days 1, 8, and 15 and radium Ra 223 dichloride IV over 1 minute on day 1. Treatment with radium Ra 223 dichloride repeats every 28 days for 6 cycles and treatment with paclitaxel repeats every 28 days in the absence of disease progression or unacceptable toxicity. ARM II: Patients receive paclitaxel IV over 1 hour on days 1, 8, and 15. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 days, then every 3 months for 2 years.

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