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Safety and Immune Response to a Prime-Boost Vaccination Schedule in HIV-infected Patients

NCT00270465 · Status: COMPLETED · Phase: PHASE1 · Type: INTERVENTIONAL · Enrollment: 17

Last updated 2017-07-02

No results posted yet for this study

Summary

Study Design: This is a Phase I, randomized, placebo-controlled, double-blinded study to examine safety, tolerability and immune response of a prime-boost vaccination regimen for treatment of HIV infection. The vaccination schedule consists of three injections of a multiclade HIV plasmid DNA vaccine followed by one injection of a multiclade recombinant adenoviral vector vaccine (rAd), in HIV-infected adults. The hypothesis is that this vaccination regimen will be safe and elicit an immune response in HIV-infected subjects. The primary objectives are related to evaluating the safety and tolerability of the vaccination regimen and assessing the effect of vaccination on humoral and cellular immune responses to vaccine-specific HIV antigens.

Product Description: VRC-HIVDNA016-00-VP is composed of 6 closed, circular DNA plasmids that are each 16.67% (by weight) of the vaccine. Each of the 6 plasmids in this vaccine expresses a single gene product. Plasmids VRC 4401, VRC 4409 and VRC 4404 are designed to express clade B HIV-1 Gag, Pol and Nef, respectively. VRC 5736, VRC 5737, and VRC 5738 are designed to express HIV-1 Env glycoprotein from clade A, clade B, and clade C, respectively. Each DNA vaccination will be 1 mL of vaccine administered intramuscularly (IM) using the Biojector 2000 Needle-Free Injection Management System. Phosphate buffered saline (PBS) will be used as the placebo for the DNA vaccine.

VRC-HIVADV014-00-VP (rAd) is a recombinant product composed of 4 adenoviral vectors (Ad) (in a 3:1:1:1 ratio) that encode the HIV-1 Gag/Pol polyprotein from clade B and HIV-1 Env glycoproteins from clades A, B, and C, respectively. Injections of 10(10) PU will be administered IM by needle and syringe. The final formulation buffer (FFB) will be used as the placebo for the rAd vaccine.

Subjects: HIV-infected adult volunteers (18-50 years old) on stable highly active antiretroviral therapy (HAART) therapy who have a CD4+ cell count greater than 350 cells/mm3 and have had a viral load (VL) less than 400 copies/mL for at least six months and a viral load of less than 50 copies/mL within 4 weeks prior to enrollment.

Study Plan: Fifteen volunteers will be enrolled and randomized in a 2:1 ratio to vaccine:control (10 DNA prime with rAd boost:5 PBS with FFB placebo). A Data and Safety Monitoring Board (DSMB) will review the study every 6 months. Subjects will be evaluated for safety and immunogenicity for 48 weeks, which is 24 weeks after the target date for the booster vaccination.

Study Duration: Subjects will be followed for 48 weeks after enrollment into the study.

Conditions

Interventions

DRUG

VRC-HIVDNA016-00-VP

DRUG

VRC-HIVADV014-00-VP

Sponsors & Collaborators

  • National Institute of Allergy and Infectious Diseases (NIAID)

    lead NIH

Study Design

Purpose
TREATMENT

Eligibility

Min Age
18 Years
Max Age
50 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2005-12-21
Primary Completion
2009-06-25
Completion
2009-06-25

Countries

  • United States

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00270465 on ClinicalTrials.gov