A Phase I Multicenter Clinical Trial to Evaluate the Safety and Immunogenicity of Immuno-AG Recombinant HIV gp160 in Asymptomatic HIV Seropositive Individuals
Study Details
Study Description
Brief Summary
To determine the safety and immunogenicity of vaccinia-derived HIV-1 recombinant envelope glycoprotein (gp160) in asymptomatic HIV-infected adult volunteers. To compare safety and immunogenicity of two different schedules of gp160 administration. To examine the effects of gp160 and hepatitis B vaccine (Engerix-B) on various markers of viral load and on selected immune parameters.
Potentiation of a patient's immune response to HIV might possibly prolong the period of clinical latency and protect the patient indefinitely. Preliminary results from a study of Immuno-AG recombinant gp160 vaccine in healthy volunteers not infected with HIV suggest that the vaccine is safe and produces antibodies against the virus. Because another previous study failed to demonstrate a specific anti-HIV response in patients injected with a recombinant vaccinia virus containing HIV-1 genes, this study is also testing the immunotherapeutic role of other immunizations (such as hepatitis B vaccination) that would be expected to induce a nonspecific immune response in HIV-infected persons.
Condition or Disease | Intervention/Treatment | Phase |
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Phase 1 |
Detailed Description
Potentiation of a patient's immune response to HIV might possibly prolong the period of clinical latency and protect the patient indefinitely. Preliminary results from a study of Immuno-AG recombinant gp160 vaccine in healthy volunteers not infected with HIV suggest that the vaccine is safe and produces antibodies against the virus. Because another previous study failed to demonstrate a specific anti-HIV response in patients injected with a recombinant vaccinia virus containing HIV-1 genes, this study is also testing the immunotherapeutic role of other immunizations (such as hepatitis B vaccination) that would be expected to induce a nonspecific immune response in HIV-infected persons.
Fifty-five healthy HIV-positive volunteers are randomly assigned to one of the following treatment arms: six injections (arm I) or four injections (arm II) of HIV-1 gp160 vaccine, four injections of hepatitis B vaccine as a non-HIV viral vaccine control (arm III), or six placebo injections consisting of the adjuvant vehicle used for the gp160 vaccine (arm IV). Immunizations or placebo are given at 4-week intervals for 5 months. To maintain blinding, adjuvant vehicle placebo is administered on days 84 and 112 to those volunteers receiving four instead of six vaccine injections (arms II and III). Volunteers are followed at 4-month intervals for 2 years.
Study Design
Outcome Measures
Primary Outcome Measures
Eligibility Criteria
Criteria
Inclusion Criteria
Concurrent Medication: Recommended:
- Prophylaxis with isoniazid in patients not previously treated.
Patients must have:
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HIV seropositivity by Western blot.
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Normal history and physical exam (generalized lymphadenopathy is acceptable).
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Mean CD4 cell count = or > 600 cells/mm3 for all visits (minimum 2 counts) within 60 days prior to study entry, with no single count < 450 cells/mm3.
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Negative PPD test or normal chest x-ray with positive PPD (induration = or > 5 mm).
Exclusion Criteria
Co-existing Condition:
Patients with the following symptoms or conditions are excluded:
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Hepatitis B surface antigen positive.
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Evidence of an AIDS- or ARC-defining opportunistic infection.
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Evidence of disseminated tuberculosis, severe or persistent candidiasis, oral hairy leukoplakia, prolonged or very severe diarrhea, herpes zoster, or herpes simplex persisting more than one month.
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Active syphilis.
Patients with the following prior conditions are excluded:
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Evidence of psychiatric disorder within the past year that would impair adherence to the protocol.
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History of an AIDS- or ARC-defining opportunistic infection.
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History of disseminated tuberculosis, severe or persistent candidiasis, oral hairy leukoplakia, prolonged or very severe diarrhea, herpes zoster, or herpes simplex persisting more than one month.
Prior Medication:
Excluded:
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Immunomodulating agents (e.g., isoprinosine, imuthiol, lithium) within 90 days of screening.
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Immunosuppressive medications within the previous 3 months.
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Zidovudine (AZT) or any antiviral agent (including interferon) within the previous 6 months.
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Vaccination against other pathogens within 4 weeks of initial screening laboratory work.
Use of illicit drugs or significant amounts of alcohol that could significantly interfere with study compliance.
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
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1 | Johns Hopkins Adult AIDS CRS | Baltimore | Maryland | United States | 21287 |
2 | Washington U CRS | Saint Louis | Missouri | United States | 63104 |
Sponsors and Collaborators
- National Institute of Allergy and Infectious Diseases (NIAID)
- Immuno-US
Investigators
- Study Chair: Schwartz D,
Study Documents (Full-Text)
None provided.More Information
Publications
- Belshe RB, Clements ML, Dolin R, Graham BS, McElrath J, Gorse GJ, Schwartz D, Keefer MC, Wright P, Corey L, et al. Safety and immunogenicity of a fully glycosylated recombinant gp160 human immunodeficiency virus type 1 vaccine in subjects at low risk of infection. National Institute of Allergy and Infectious Diseases AIDS Vaccine Evaluation Group Network. J Infect Dis. 1993 Dec;168(6):1387-95.
- Keefer MC, Graham BS, Belshe RB, Schwartz D, Corey L, Bolognesi DP, Stablein DM, Montefiori DC, McElrath MJ, Clements ML, et al. Studies of high doses of a human immunodeficiency virus type 1 recombinant glycoprotein 160 candidate vaccine in HIV type 1-seronegative humans. The AIDS Vaccine Clinical Trials Network. AIDS Res Hum Retroviruses. 1994 Dec;10(12):1713-23.
- ACTG 205
- 11182
- AVEG 101