A Phase II Clinical Trial to Evaluate the Immunogenicity and Reactogenicity of the Recombinant HIV-1 Envelope Vaccines SF-2 rgp120 (CHO) [Chiron Vaccines] in MF59 Adjuvant and MN rgp120/HIV-1 [VaxGen] in Alum Adjuvant in Healthy Adults

Summary

To evaluate the safety and immunogenicity of SF-2 rgp120 vaccine in MF59 versus MN rgp120 vaccine in alum in volunteers who are seronegative for HIV-1. AS PER AMENDMENT 07/02/97: To determine the ability of immunization with MN rgp120/HIV-1 in combination with alum or SF-2 rgp120 in combination with MF59 to induce an HIV-1 envelope-specific delayed-type hypersensitivity (DTH) response in volunteers who receive rsgp120/MN skin testing. The amino acid sequence of HIV-1 gp120 can vary as much as 40 percent from isolate to isolate. Thus, the identification of an immunogen that can elicit broadly neutralizing antibodies to HIV-1 is a major challenge in AIDS vaccine development. Two candidate vaccines, recombinant envelope subunit proteins from the SF-2 and MN isolates of HIV-1, have shown immunogenicity and good tolerance in healthy immunocompetent adults. This study will expand testing into a larger population base, particularly targeting individuals at high risk for HIV infection.

Timeline

Start

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Primary completion

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Completion

1997-12

Publications

• Background McElrath MJ, Corey L, Clements ML, Belshe R, Keefer M, Graham B, Fast P, Matthews T, Duliege AM, Francis D. A phase II HIV vaccine trial in seronegative subjects: safety, immunogenicity, and future directions. Int Conf AIDS. 1994 Aug 7-12;10(1):91 (abstract no 317A)
• Background McElrath MJ, Montefiori DM, Clements ML, Belshe RB, Dolin R, Graham BS, Duliege A-M, Francis D, Bolognesi DP, Matthews TJ, Wolff M, Fast P, Corey L. Longitudinal vaccine-induced immunity and risk behavior of study participants of AVEG phase II protocol 201. Conf Adv AIDS Vaccine Dev. 1996 Feb 11-15;216 [Poster 96]
• Background McElrath MJ, Corey L, Montefiori D, Wolff M, Schwartz D, Keefer M, Belshe R, Graham BS, Matthews T, Wright P, Gorse G, Dolin R, Berman P, Francis D, Duliege AM, Bolognesi D, Stablein D, Ketter N, Fast P. A phase II study of two HIV type 1 envelope vaccines, comparing their immunogenicity in populations at risk for acquiring HIV type 1 infection. AIDS Vaccine Evaluation Group. AIDS Res Hum Retroviruses. 2000 Jun 10;16(9):907-19. doi: 10.1089/08892220050042846.
• Background Harrison K, Vlahov D, Jones K, Charron K, Clements ML. Medical eligibility, comprehension of the consent process, and retention of injection drug users recruited for an HIV vaccine trial. J Acquir Immune Defic Syndr Hum Retrovirol. 1995 Nov 1;10(3):386-90.
• Background McElrath MJ, Montefiori D, Wolff M, Clements M, Gorse G, Keefer M, Graham B, Duliege AM, Francis D, Matthews T, Fast P, Corey L. Safety, immunity, and risk behavior in HIV-1-uninfected volunteers representing diverse risk populations following recombinant envelope vaccinations: a three-year followup. Int Conf AIDS. 1996 Jul 7-12;11(1):10 (abstract no MoA284)

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