HIV Infections, HIV Seronegativity
Conditions
Keywords
Vaccines, Synthetic, Vaccinia Virus, Viral Vaccines, Smallpox Vaccine, HIV-1, HIV Envelope Protein gp160, AIDS Vaccines, HIV Seronegativity, HIV Preventive Vaccine
Brief summary
AMENDED 8/94: To expand the safety and immunogenicity profile of MN rgp160 vaccine (Immuno-AG) by administering a higher dose (800 mcg) at 0, 1, 6, and 12 months and 0, 2, 8 and 14 months (these two schedules were compared in VEU 013A using a dose of 200 mcg). To obtain plasma following the fourth immunization. To evaluate skin test reactivity. ORIGINAL (replaced): To determine in healthy volunteers the safety and immunogenicity of two immunizations of MN rgp160 vaccine (Immuno-AG) in combination with a live recombinant vaccinia virus LAV HIV-1 gp160 vaccine (HIVAC-1e) versus DryVax (the standard smallpox vaccine that was used for many years) control in combination with placebo. ORIGINAL (replaced): A gp160 vaccine derived from the MN strain, the most prevalent strain of HIV-1 in the United States, has been developed. A previous study showed that a combination vaccine strategy, consisting of priming with HIVAC-1e followed by boosting with a gp160 subunit vaccine, resulted in humoral and cellular immune responses of greater and longer duration than either vaccine alone. Thus, a live vector/subunit boost approach using the MN rgp160 vaccine merits investigation.
Detailed description
ORIGINAL (replaced): A gp160 vaccine derived from the MN strain, the most prevalent strain of HIV-1 in the United States, has been developed. A previous study showed that a combination vaccine strategy, consisting of priming with HIVAC-1e followed by boosting with a gp160 subunit vaccine, resulted in humoral and cellular immune responses of greater and longer duration than either vaccine alone. Thus, a live vector/subunit boost approach using the MN rgp160 vaccine merits investigation. AMENDED 8/94: Volunteers are randomized to receive 800 mcg MN rgp160 vaccine (Immuno-AG) or adjuvant control (placebo) on one of two dosing schedules. Sixteen volunteers receive candidate vaccine and four volunteers receive placebo. ORIGINAL (replaced): Volunteers are randomized to receive either HIVAC-1e on days 0 and 56 followed by immunization with MN rgp160 vaccine on days 224 and 364, or DryVax control on days 0 and 56 followed by placebo on days 224 and 364. Ten volunteers are entered on the MN rgp160 vaccine arm and two volunteers on the placebo arm. PER AMENDMENT 7/96: Two additional booster immunizations of 600 mcg of MN rgp 120/HIV-1 vaccine given at study months 22 and 24 to consenting St. Louis University volunteers.
Interventions
BIOLOGICALgp160 Vaccine (Immuno-AG)
Sponsors
National Institute of Allergy and Infectious Diseases (NIAID)
Study design
Primary purpose
PREVENTION
Eligibility
Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
Yes
Inclusion criteria
Subjects must have: * Normal history and physical exam. * Negative test for HIV by ELISA within 6 weeks prior to immunization. * Negative test for HIV by Western blot. * CD4 count \>= 400 cells/mm3. * No history of smallpox vaccination. * Normal urine dipstick with esterase and nitrate. * No history of immunodeficiency, chronic illness, autoimmune disease, or use of immunosuppresssive medications.
Exclusion criteria
Co-existing Condition: Subjects with the following conditions are excluded: * Positive for hepatitis B surface antigen. * Medical or psychiatric condition or occupational responsibilities that preclude compliance. * Active syphilis (NOTE: If serology is documented to be a false positive or due to a remote (\> 6 months) infection, subject is eligible). * Active tuberculosis (NOTE: Subjects with a positive PPD and normal x-ray showing no evidence of TB and who do not require INH therapy are eligible). * Eczema. Household contact with persons meeting any of the following criteria: * pregnancy, \< 12 months of age, eczema, or immunodeficiency disease or use of immunosuppressive medications. Subjects with the following prior conditions are excluded: * History of anaphylaxis or other serious adverse reactions to vaccines. * Eczema within the past year. * PER 8/94 AMENDMENT: History of cancer unless surgically excised with reasonable assurance of cure. * PER 8/94 AMENDMENT: History of serious allergic reaction requiring hospitalization or emergent medical care. Prior Medication: Excluded: * Prior HIV vaccines. * Live attenuated vaccines within the past 60 days. NOTE: Medically indicated subunit or killed vaccines (e.g., influenza, pneumococcal) do not exclude but should be administered at least 2 weeks prior to HIV immunizations. * Experimental agents within the past 30 days. Prior Treatment: Excluded: * Blood products or immunoglobulin within the past 6 months. Higher risk behavior for HIV infection as determined by screening questionnaire, including: * History of injection drug use within 12 months prior to study entry. * Higher or intermediate risk sexual behavior.
Countries
United States
Outcome results
None listed