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Active Immunization of Asymptomatic, HIV-Infected Individuals With Recombinant GP160 HIV-1 Antigen: A Phase I/II Study of Immunogenicity and Toxicity
This study has been completed.
Sponsored by: | MicroGeneSys |
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Information provided by: | National Institute of Allergy and Infectious Diseases (NIAID) |
Purpose
To determine the minimal effective (immunogenic) dose of vaccine in asymptomatic HIV-1 seropositive individuals with > 400 cells/mm3 (CD4). To determine the dose-response to a 4 fold escalation of the immunizing dose. To describe both cellular and humoral immune responses to HIV-1 in the immunized individuals. To describe the effects of this immunization on general immunological, virological and clinical parameters. To evaluate the safety of injecting recombinant gp160 in this population. To evaluate the extent of variability between different lots of gp160 (arms C1 and C2). It might be possible to increase immune responses or to induce new types of immune responses to HIV in some infected individuals by means of a vaccine, which could result in an immunological, virological or clinical benefit.
Condition | Treatment or Intervention | Phase |
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HIV Infections |
Vaccine: gp160 Vaccine (MicroGeneSys) |
Phase I |
MedlinePlus related topics: AIDS
Study Type: Interventional
Study Design: Treatment
Expected Total Enrollment: 52
It might be possible to increase immune responses or to induce new types of immune responses to HIV in some infected individuals by means of a vaccine, which could result in an immunological, virological or clinical benefit.
ORIGINAL DESIGN: Patients are randomized to one of five groups to receive, intramuscularly, one of four dosages of gp160 or hepatitis B vaccine as a control. Treatments are given at 0, 1, 3, 6, 9, and 12 months and patients are followed for up to 2 years. Patients in any of the 5 groups will have the option of switching to another dosage group if an interim analysis at 6 months shows significant differences in patient response. AMENDED: 10/23/90 52 eligible patients are randomized to one of 6 study groups. Five groups of 8 individuals receive one of 4 dosage levels of gp160 (Groups A, B, C1, C2, and D), and 12 patients receive a single dosage level of hepatitis B vaccine as a control (Group E). Per 2/19/92 amendment, patients may elect to continue receiving vaccine beyond 12 months, with the doses given either every 3 months or every 6 months.
Eligibility
Ages Eligible for Study: 18 Years and above, Genders Eligible for Study: Both
Criteria
Inclusion Criteria
Concurrent Medication: Allowed:
An additional group of up to 20 patients may be added to the study. Patients from ACTG 148 with a repeatedly negative delayed-type hypersensitivity (DTH) reaction who have reached their third dose of ID gp160 at 32 mcg and have failed to develop new proliferative response have the option, after a 2-month interval, to enter this protocol.
Exclusion Criteria
Co-existing Condition: Patients with the following conditions or symptoms are excluded:
Concurrent Medication: Excluded:
Patients with the following are excluded:
Prior Medication: Excluded within 90 days of study entry:
Active substance abuse (either continuing daily alcohol abuse or intravenous drug use).
Location Information
More Information
Publications
Valentine F, et al. A randomized, controlled study of immunogenicity of rgp160 vaccine in HIV-infected subjects. Int Conf AIDS. 1992 Jul 19-24;8(1):Tu39 (abstract no TuB 0561)
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