Phase II Study of Intravenous Rexin-G in Osteosarcoma

Osteosarcoma Clinical Trial

Official title: A Phase II Study of Intravenous Rexin-G in Recurrent or Metastatic Osteosarcoma

Status Completed

Clinical Trial Summary

Rexin-G is a tumor-targeted gene medicine that is designed to seek out and destroy both primary tumors and metastatic cancers without the side effects of standard chemotherapy. The objectives of the study are: (1) to evaluate the clinical effectiveness of intravenous injections of Rexin-G, a tumor-targeted gene vector, in controlling tumor growth and prolonging life, and (2) to evaluate its over-all safety.

Clinical Trial Description

The adaptive trial design of this advanced Phase II study incorporates (i) a dosing schedule based on the patient's estimated tumor burden and not on standard dosing per kilogram body weight or body surface area, and (2) a tumor response evaluation process that is unique to the manner in which osteosarcoma responds favorably to therapy, i.e., with necrosis and increasing calcification in metastatic tumors and decreased glucose utilization using PET-CT imaging studies.

Twenty to thirty patients will receive Rexin-G at either Dose Level 1 or 2. Patients will be assigned a dose level based on the estimated tumor burden as measured by PET-CT imaging studies. Estimated tumor burden is measured by multiplying the sum of the longest diameters of target lesions in cm by 10e9 cancer cells. If the tumor burden is less than 10 billion cells, the patient will be assigned to Dose Level 1, if the tumor burden is greater than 10 billion cells, the patient will be assigned to Dose Level 2.

*Treatment Cycle Dose Level Vector Dose/Day Max.Volume/Dose

Two times a week 1 1.0 x 10e11 cfu 200 ml

Three times a week 2 1.0 x 10e11 cfu 200 ml

• Each treatment cycle will be six weeks (four weeks of treatment and two weeks of rest). Patients who have resolution of toxicity to < grade I may have repeat cycles. After one or more treatment cycles, the principal investigator may recommend surgical debulking or complete surgical removal. If residual disease is present either by histopathological examination or by PET-CT scan, repeat treatment cycles may be given 3-4 weeks after surgery, if the surgical incision has healed, and if the patient has < grade I toxicity. ;

Study Design

Allocation: Non-Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Osteosarcoma

• NCT number: NCT00572130
• Study type: Interventional
• Source: Epeius Biotechnologies
• Status: Completed
• Phase: Phase 2
• Start date: December 2007
• Completion date: June 2011