Consolidation Therapy in Patients With Metastatic Solid Malignancies

Cancer Clinical Trial

Official title: Phase I/II Study of Low-Dose Cyclophosphamide, Tumor Associated Peptide Antigen (TAPA)-Pulsed Dendritic Cell (DC) Therapy and Low Dose GM-CSF, as Consolidation Therapy in Patients With Metastatic Solid Malignancies

Status Withdrawn

Clinical Trial Summary

This study evaluates the effectiveness of Tumor Associated Peptide Antigens (TAPA) pulsed dendritic cell injections as a potential consolidation therapy for patients with metastatic solid malignancies (SM). The investigators hypothesize that treatment of patients with metastatic SM who demonstrate a tumor response, or whose disease remains stable, after conventional first-line systemic therapy AND who lack an available, potentially curative therapeutic intervention and whose tumor cells and/or blood express at least one (1) TAPA of a defined panel of TAPAs will result in TAPA-specific T-cell responses without significant toxicities. The investigators also hypothesize CD4+ and CD8+ T-cell responses generated against specific TAPAs may translate into clinical antitumor activity.

Clinical Trial Description

Patients diagnosed with metastatic solid malignancies (SM), who have responded or whose disease remains stable following first line systemic therapy, and without available, potential curative therapeutic options, will be candidates for this Phase I/II study. Potentially eligible patients who agree to participate and sign a consent form will have their neoplastic cells and/or blood analyzed for the expression of a specific panel of Tumor Associated Peptide Antigens (TAPAs), including Sp17, ropporin, AKAP-4, PTTG1, Span-xb, Her-2/neu, HM1.24, NY-ESO-1 and MAGE-1. Patients whose tumors express one (1) or more of these TAPAs will receive three (3) days of subcutaneous Granulocyte Macrophage Colony Stimulating Factor (GM-CSF) to increase bone marrow production of monocytes and dendritic cell (DC) precursors, and whole blood will be obtained by phlebotomy and/or leukapheresis for generation of autologous DCs. Patient's DCs will be generated in Kiromic's Cell Processing Good Manufacturing Process (GMP) facility, according to established Standard Operating Procedures, and activated by pulsing/loading them with the TAPA(s) relevant for each particular patient. Patients will receive five (5) days of low-dose cyclophosphamide prior to each vaccination with TAPA-pulsed DCs to decrease Treg activity. TAPA-pulsed DCs will be administered at a fixed dose of up to 1 X 107 DCs at least two (2) days following cyclophosphamide administration. DC vaccination schedule will be once every fourteen (14) days via subcutaneous (SC) and intradermal (ID) injections for a total of 6 vaccinations. Low dose GM-CSF will also be administered SC for five (5) consecutive days, starting three (3) to six (6) hours after each TAPA-pulsed DC treatment, to optimize immune responses. Patients will be followed on a weekly basis (or more frequently if required) to evaluate treatment-related toxicity. Immune responses and anti-tumor responses will be evaluated per protocol specifications. Continuation and stopping rules for the study will be defined based on toxicity/tolerability (Phase I) and/or immune responses (Phase II). ;

Related Conditions & MeSH terms

• Cancer
• Metastatic Solid Malignancies
• Neoplasms

• NCT number: NCT02705703
• Study type: Interventional
• Source: Kiromic, Inc.
• Status: Withdrawn
• Phase: Phase 1/Phase 2
• Start date: July 28, 2017
• Completion date: January 31, 2019