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Radiation Therapy with or without Olaparib in Treating Patients with Inflammatory Breast Cancer

Status
Active
Cancer Type
Breast Cancer
Unknown Primary
Trial Phase
Phase II
Eligibility
18 Years and older, Male and Female
Study Type
Treatment
NCD ID
NCT03598257
Protocol IDs
S1706 (primary)
S1706
NCI-2018-01519
Study Sponsor
SWOG
NCI Full Details
http://clinicaltrials.gov/show/NCT03598257

Summary

This phase II trial studies how well radiation therapy with or without olaparib works in treating patients with inflammatory breast cancer. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Olaparib is an inhibitor of PARP, an enzyme that helps repair deoxyribonucleic acid (DNA) when it becomes damaged. Blocking PARP may help keep cancer cells from repairing their damaged DNA, causing them to die. PARP inhibitors are a type of targeted therapy. It is not yet known whether radiation therapy with or without olaparib may work better in treating patients with inflammatory breast cancer.

Objectives

PRIMARY OBJECTIVE:
I. To compare the invasive disease-free survival (IDFS) of patients with inflammatory breast cancer receiving concurrent administration of olaparib with standard doses of radiotherapy to the chest wall and regional lymph nodes compared to standard doses of radiotherapy alone to the chest wall and regional lymph nodes.

SECONDARY OBJECTIVE:
I. To compare the effect of concurrent administration of olaparib with radiotherapy versus radiotherapy alone on improvement in locoregional control (measured by locoregional recurrence-free interval), distant relapse-free survival, and overall survival in inflammatory breast cancer patients.

ADDITIONAL OBJECTIVE:
I. To collect tissue and whole blood for processing and banking in anticipation of future correlative studies in this patient population.

OUTLINE: Patients are randomized to 1 of 2 groups.

GROUP I: Patients receive olaparib orally (PO) twice daily (BID) the day before standard radiation therapy (RT) commences (Day 0) and throughout the RT course until the last day of RT administration. Olaparib is also continued on weekends (routine days without RT) throughout the RT course. Patients undergo radiation therapy 5 days per week for 6 weeks in the absence of disease progression or unacceptable toxicity.

GROUP II: Patients undergo standard radiation therapy 5 days per week for 6 weeks in the absence of disease progression or unacceptable toxicity.

Patients undergo blood sample collection throughout the study.

After completion of study treatment, patients are followed up within 5 weeks, then every 3 months until 3 years after registration, and then every 6 months for up to 8 years after registration.
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