Radio-immunotherapy (CDX-301, Radiotherapy, CDX-1140 and Poly-ICLC) for the Treatment of Unresectable or Metastatic Breast Cancer Patients

Summary

Participation Requirements

Description

PRIMARY OBJECTIVE: I. To evaluate the safety profile of in situ immunomodulation with recombinant Flt3 ligand (CDX-301), radiotherapy, agonistic anti-CD40 monoclonal antibody CDX-1140, and Poly-ICLC in unresectable and metastatic breast cancer patients with injectable palpable disease. SECONDARY OBJ...

PRIMARY OBJECTIVE: I. To evaluate the safety profile of in situ immunomodulation with recombinant Flt3 ligand (CDX-301), radiotherapy, agonistic anti-CD40 monoclonal antibody CDX-1140, and Poly-ICLC in unresectable and metastatic breast cancer patients with injectable palpable disease. SECONDARY OBJECTIVE: I. To evaluate the immune signatures in the tumor microenvironment before and after in situ immunomodulation with CDX-301, radiotherapy, CDX-1140, and Poly-ICLC. EXPLORATORY OBJECTIVES: I. To record the overall response rate (ORR) (complete response [CR] and partial response [PR]) of distant uninjected metastatic lesions in metastatic breast cancer patients with injectable palpable disease treated with in situ immunomodulation with CDX-301, radiotherapy, CDX-1140, and Poly-ICLC by immune-related Response Evaluation Criteria In Solid Tumors (irRECIST) response assessment, and compare intratumoral alone versus (vs.) intratumoral + intravenous administration of CDX-1140. II. To record the overall survival (OS) and progression free survival (PFS) in unresectable and metastatic breast cancer patients with injectable palpable disease treated with in situ immunomodulation with CDX-301, radiotherapy, CDX-1140, and Poly-ICLC, and compare intratumoral alone vs. intratumoral + intravenous administration of CDX-1140. III. Examine changes in the levels of T-cell subsets/myeloid derived suppressor cells (MDSC)/cytokines in peripheral blood (PB) of unresectable and metastatic breast cancer patients with injectable palpable disease treated with in situ immunomodulation with CDX-301, radiotherapy, CDX-1140, and Poly-ICLC. OUTLINE:Cohort A will evaluate safety of intratumoral administration of CDX-1140 in combination with CDX-301, radiotherapy and Poly-ICLC. Once cohort A is finished, patients will be enrolled to cohort B to evaluate safety of intratumoral + intravenous administration of CDX-1140 in combination with CDX-301, radiotherapy and Poly-ICLC. COHORT A: Patients receive recombinant Flt3 ligand intratumorally (IT) on days 1-5 and agonistic anti-CD40 monoclonal antibody CDX-1140 IT with Poly-ICLC IT on day 9 or 10. Patients also undergo radiation therapy on day 8 or 9. Treatment repeats every 21 days for 4 cycles in the absence of disease progression or unacceptable toxicity. COHORT B: Patients receive recombinant Flt3 ligand IT on days 1-5 and agonistic anti-CD40 monoclonal antibody CDX-1140 IT and intravenously (IV) over 90 minutes with Poly-ICLC IT on day 9 or 10. Patients also undergo radiation therapy on day 8 or 9. Treatment repeats every 21 days for 4 cycles in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 days and then every 6 months for 2 years.

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