This phase I trial studies the side effects and best dose of deoxyribonucleic acid (DNA) vaccine therapy in treating patients with hepatitis C virus (HCV) infection that persists or progresses over a long period of time. Vaccines made from DNA may help the body build an effective immune response to kill cancer cells that express HCV infection.
PRIMARY OBJECTIVES: I. To determine the safety profile of the HCV DNA vaccine, consisting of INO-8000 (HCV antigen DNA) alone or co-administered with INO-9012 (interleukin \[IL\]-12 adjuvant DNA) (DNA plasmid encoding interleukin-12 INO-9012). II. To identify a dose of INO-9012 (IL-12 adjuvant DNA) for co-administration with INO-8000 (HCV antigen DNA) based on induction of HCV-specific interferon (IFN)-gamma production by peripheral blood mononuclear cells at 26 weeks compared to baseline in HCV-infected participants. TRANSLATIONAL OBJECTIVES: I. Determine the rate at which INO-8000 with different doses of INO-9012 induces a \> 1 log decrease (or undetectable) in HCV ribonucleic acid (RNA) level at weeks 14 and 26. II. Determine the rate at which INO-8000 with different doses of INO-9012 induces an end-of-treatment undetectable HCV RNA (end-of-treatment virologic response - EVR) at 26 weeks and a sustained virologic response (SVR) at 36 weeks. III. Determine the rate at which INO-8000 with different doses of INO-9012 induces other parameters of cluster of differentiation (CD)8 and CD4 T lymphocyte responses as measured by flow cytometry, and antibody responses to HCV antigen at weeks 14 and 26. OUTLINE: This is a dose-escalation study of INO-9012. Patients receive INO-8000 intramuscularly (IM) and DNA plasmid encoding interleukin-12 INO-9012 IM (dose levels 2-4) followed by electroporation (EP) at day 0 and at weeks 4, 12, and 24. After completion of study treatment, patients are followed up at weeks 48 and 76.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
PREVENTION
Masking
SINGLE
Enrollment
33
Mayo Clinic in Florida
Jacksonville, Florida, United States
Mayo Clinic in Rochester
Rochester, Minnesota, United States
Case Western Reserve University
Cleveland, Ohio, United States
Temple University Hospital
Philadelphia, Pennsylvania, United States
Incidence of dose-limiting toxicity
Will be defined as an adverse event occurring after the initial vaccine administration, based on the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0. The percentage of participants who experience grade 3 or worse adverse events and administration-site reactions following each dose will be summarized using descriptive statistics across each dose level.
Time frame: Baseline to 26 weeks
Mean change of interferon-gamma production by peripheral blood mononuclear cells
Change in production of interferon-gamma by peripheral blood mononuclear cells will be based on a one-way analysis of variance model using data from all dose levels at the 2-sided 5% level. Mean change (and % change) and the associated 95% confidence intervals in the production of IFN-gamma by peripheral blood mononuclear cells for all evaluable participants enrolled at each dose level will be computed, and compared across the dose levels in an exploratory fashion using graphical approaches, one-way analysis of variance models etc. to ascertain a dose-response curve.
Time frame: Baseline to 26 weeks
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Ancillary studies
Given IM
University of Puerto Rico
San Juan, Puerto Rico