Safety of an Oral HIV Vaccine in HIV Uninfected Volunteers
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|ClinicalTrials.gov Identifier: NCT00062530|
Recruitment Status : Unknown
Verified September 2008 by National Institute of Allergy and Infectious Diseases (NIAID).
Recruitment status was: Not yet recruiting
First Posted : June 12, 2003
Last Update Posted : September 26, 2008
|Condition or disease||Intervention/treatment||Phase|
|HIV Infections||Biological: SCBaL/M9||Phase 1|
The transmission of HIV-1 by both sexual and parenteral routes makes it likely that a successful preventive vaccine against this virus will need to induce protective immunity in both mucosal and systemic compartments. The long-term objective of this program is to develop an HIV-1 vaccine that elicits protective immunity in both the mucosal and systemic compartments.
The study will evaluate the safety and immunogenicity of an oral recombinant Salmonella typhi HIV-1 gp120 vaccine (SCBaL/M9) in healthy human volunteers. This will be the first study in volunteers to use an intracellular bacterium to deliver a recombinant vector vaccine mucosally. The study will also develop an Env immunogen that elicits a broader spectrum of neutralizing antibodies than gp120 and that can be delivered by Salmonella typhi or as a soluble protein immunogen.
This is a Phase I dose-escalation study of two vaccine components that will be combined in a larger prime-boost protocol should the desired safety endpoints be obtained. Both components use a conformationally constrained gp120 that expresses epitopes recognized by broadly neutralizing antibodies. The priming immunogen will be the conformationally constrained gp120 gene delivered orally by live attenuated Salmonella typhi. The boosting immunogen will be a soluble subunit protein comprised solely of the conformationally constrained gp120.
All participants in this study will receive the vaccine. Participants will be randomized to different vaccine doses. Participants will have eight study visits over 20 weeks. Study visits will include brief medical interview, physical exam, blood and urine tests, and counseling on avoiding HIV infection and pregnancy. Participants will be tested for HIV infection 3 times during the study.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||38 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|Official Title:||Development of an Oral Prime-Boost AIDS Vaccine to Elicit Broadly Neutralizing Antibodies Against HIV-1|
All participants will receive oral vaccine at study entry, although dosage will vary
Oral recombinant Salmonella typhi HIV-1 gp120 vaccine
- Safety, as judged by the lack of an immune response to CD4 epitopes or other significant adverse events as defined by the HVTN toxicity tables [ Time Frame: Throughout study ]
- Neutralizing antibody response against HIV-1 [ Time Frame: Throughout study ]
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00062530
|Contact: George K. Lewis, PhD||410- firstname.lastname@example.org|
|United States, Maryland|
|Institute of Human Virology||Not yet recruiting|
|Baltimore, Maryland, United States, 21201|
|Principal Investigator:||George K. Lewis, PhD||Univesity of Maryland|