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a genetically-engineered vaccinia virus (encoding Renilla luciferase-Aequorea green fluorescent protein fusion, β-galactosidase, and β-glucuronidase )

GL-ONC1

Johann de Bono, MD FRCP MSc PhD

Kevin Harrington, MBBS MRCP FRCR

Hardev Pandha, MD,FRCP,FRACP,PhD

The main purpose of this study is to determine whether, GL-ONC1, an Oncolytic Virus, can safely be administered intravenously in patients with advanced solid tumors.

In preclinical studies, GL-ONC1 an oncolytic vaccinia virus, has shown the ability to preferentially locate, colonize and destroy tumor cells. This study seeks to evaluate the safety profile of an attenuated vaccinia virus when administered intravenously to patients with advanced solid tumors. The study also seeks to detect virus delivery to primary and/or metastatic tumors, including evaluation of viral delivery by fluorescence imaging (GFP expression); whether anti-vaccinia virus immune response occurs; and will record evidence of any anti-tumor activity. For Cohorts 8 and Expansion Cohort 1B, CTC counts, virus-encoded marker gene analysis and Dynamic Contrast (DCE-MRI) MRI imaging will be used to evaluate tumor micro-circulation in vivo. These measures will be evaluated for their potential predictive value of survival outcomes, and to evaluate any correlation of such pharmacodynamic and response rate indicators in the GL-ONC1 treatment context.

Safety Study of GL-ONC1, an Oncolytic Virus, in Patients With Advanced Solid Tumors

Phase I Study of the Safety, Tolerability,and Tumor-Specific Replication of the Intravenous Administration of Green Fluorescent Protein Encoded Genetically Engineered Attenuated Vaccinia Virus, GL-ONC1, in Patients With Advanced Solid Organ Cancers.

Generally CT scan (conventional or spiral), PET/CT, MRI or clinical examination will be used for patients in Cohorts 1-7, however tumor markers can also be used to assess response. For patients enrolled in Cohort 8 and the Phase IB expansion cohort of this trial, tumor evaluation will also be performed by DCE and DW-MRIs as well as FDG-PET-CT and CT scans. RECIST and modified CHOI criteria for response will be employed in image evaluations.

Circulating Tumor Cells are present in patients with advanced metastatic solid tumor cancers. Beta-glucomidase analysis will be used to determine expression of the virus encoded marker genes. CTC counts and Beta-glucomidase values together may be a prognostic indicator (measure of survival outcomes) for patients with solid tumors.

For patients in Cohort 8 and a Phase 1B expansion study group who have high circulating blood cell counts and solid tumors that may be safely, serially biopsied, the study seeks to demonstrate the correlation of CTC number with radiological outcomes, including Dynamic Contrast Enhanced (DCE) and Diffusion Weighted (DW) magnetic resonance imaging (MRI) and fluoro-deoxy glucose (FDG)-positron emission tomography (PET)-computed tomography (CT) scan changes as early pharmacodynamic and response rate indicators in the GL-ONC1 treatment context.

Spots Global Cancer Trial Database for advanced cancers (solid tumors)