Active clinical trials for "HIV Infections"

To prevent individuals who have had a massive accidental exposure to HIV from becoming infected with HIV and possibly developing AIDS, by treating them with zidovudine (AZT). Although the number of persons who have been (or will be) exposed to a high concentration of HIV is quite small, these persons have a high risk of becoming infected and treatments are needed to prevent infection after such an exposure. In animal studies, AZT has prevented the development of infections after exposure of the animals to a retrovirus (the HIV is a retrovirus). In patients with AIDS, AZT has been effective in delaying the progression of the disease. For these reasons a trial of AZT is indicated.

AMENDED 11/17/93: To determine whether the pattern of response to MN rgp120 vaccine is altered by pre-exposure to IIIB rgp120. ORIGINAL DESIGN: To evaluate the safety (clinical and immunologic) of rgp120/HIV-1IIIB vaccine (gp120 vaccine) immunization in healthy HIV-1 seronegative adult subjects. To compare the immune response to 100 mcg gp120 vaccine versus 300 mcg gp120 vaccine. To determine whether gp120 vaccine immunization causes a significant immune response as defined by specific parameters (e.g., induction of neutralizing antibodies to the IIIB isolate of HIV-1, gp120 antigen-specific lymphocytic proliferation). Recent evidence suggests that gp120 is the HIV-1 protein with the greatest potential as a vaccine against HIV-1 infection. The gp120 envelope protein may be produced by recombinant DNA technology, and studies have shown that the vaccine is capable of eliciting neutralizing antibody activity in both rodents and nonhuman primate species.

AMENDED 10/1/93: To evaluate the influence of prior immunization with an rgp120 vaccine on immune response to a subsequent immunization with a different strain of rgp120 (VEU 009X extension - in patients previously enrolled on VEU 009). ORIGINAL DESIGN: To evaluate the clinical and immunologic safety of MN rgp120/HIV-1 vaccine (MN rgp120 vaccine) given alone or concurrently with the IIIB rgp120/HIV-1 vaccine (IIIB rgp120 vaccine) in healthy HIV-1 seronegative adult subjects. To compare the immune response to MN rgp120 vaccine given at 100, 300, or 600 mcg. To determine the immune response to 300 mcg MN rgp120 vaccine and 300 mcg IIIB rgp120 vaccine given concurrently. Recent studies suggest that immunity to the HIV-1 rgp120 protein may prevent primary infection. MN rgp120 vaccine and IIIB rgp120 vaccine are both prepared by recombinant DNA technology. Because the two vaccines are derived from distinct HIV-1 strains, they may elicit some immunologic responses that differ. Unlike IIIB rgp120 vaccine, the MN rgp120 vaccine has not yet been evaluated in humans, although it is expected that the MN type will result in similar safety and immunogenicity as the IIIB type.

PRIMARY: To compare the immunogenicity and safety of each of several HIV-1 derived immunogens versus control in HIV-infected individuals with CD4 counts greater than or equal to 500 cells/mm3. SECONDARY: To determine whether significant advantages to any one vaccine exist. Before large clinical trials of anti-HIV vaccines are undertaken, it is important to determine whether there are significant advantages to any one of the vaccines currently offered for such studies.

To evaluate the safety and immune response of 100 mcg Env 2-3 antigen administered on days 0, 30, 180, and 365. Preliminary immunologic data from protocol VEU 005B show evidence of the development of functional antibodies in the form of increased peptide binding and development of neutralizing antibodies. Evaluation of an antigen dose having potentially greater immunogenicity is therefore of particular interest.

The purpose of this study is determine whether different antiretroviral therapy (ART) changes the effects on body fat and predict the weight change in Black and Hispanic females.

Part A: The purpose of this part of the study is to understand how the body's immune system responds to a new lab-made antibody against HIV. The study is looking to see if the way the antibody is given affects the immune response. The study will also look at whether the antibody is safe to give to people and does not make them too uncomfortable. Part B: The purpose of this part of the study is to understand how the body's immune system responds to lab-made antibodies against HIV when they are given in combination at different doses. The study also wants to see if the way the antibodies are given affects the immune response.

This study is designed to evaluate the safety of the FLSC vaccine and will be a randomized, placebo-controlled, modified double-blinded dose escalation study in 60 healthy adult volunteers (Human Immunodeficiency Virus-1 uninfected).

Recent breakthroughs in antiretroviral (ARV)-based prevention provide new opportunities to rethink HIV prevention and treatment strategies, especially for key populations such as Female Sex Workers (FSWs). Antiretroviral (ARV)-based prevention of HIV transmission has the potential to have a profound population-level impact on the course of the HIV/AIDS pandemic. Several recently completed randomized controlled trials of HIV Pre-exposure Prophylaxis (PrEP) have shown efficacy at reducing HIV acquisition in high-risk populations. How to translate these trial results into population-level effects is the next critical step. PrEP "demonstration" projects, in collaboration with local stakeholders and at sites of routine care for high-risk populations provide an opportunity to move promising research results into actual public health benefits. With these key features in mind, the investigators propose an HIV PrEP demonstration project in FSW in Dakar, Senegal, West Africa. The objective of the proposed demonstration project with Tenofovir DF/Emtricitabine (TDF/FTC) among Female Sex Workers (FSW) in Dakar Senegal is to build a sustainable HIV PrEP program for FSW in Dakar, Senegal while demonstrating the feasibility of providing daily oral PrEP with Truvada (TDF/FTC) for 12 months to the enrolled FSW at Ministry of Heath run clinics (Pikine, Mbao, Rufisque and Diamniadio Health Centers). Critical milestones for this demonstration project with be feasibility, uptake, acceptability, use of TDF/FTC PrEP and programmatic retention of FSWs in Dakar MoH clinics. The investigators have assembled an expert team from RARS,The University of Washington, and Westat that have had greater than 2 decades of collaboration on HIV related projects in FSWs in Senegal. The investigators expect the results of this project will show that Senegal provides a unique opportunity to assess acceptability, feasibility, uptake and effectiveness of oral HIV PrEP at reducing HIV transmission in a high-risk FSW population.

African American men have by far the highest rates of HIV in the US, but there are few randomized controlled trials (RCTs) of interventions to dissuade heterosexually active African American men from engaging sexual risk behavior. This research seeks to address this gap in the behavioral intervention literature. That self-initiated behavior change, as well as intervention-induced behavior change, is often short-lived, eroding over time, is widely known; accordingly, this research also seeks to test a strategy to sustain intervention efficacy. In a RCT, African American men 18 to 45 years reporting recent unprotected intercourse with a woman will be randomized to the Steering Together in a New Direction (STAND) HIV Risk Reduction Intervention or a No-Intervention Control Condition. To test a strategy to sustain intervention effects, the men also will be randomized to receive or not receive individually tailored text messages. The theoretical basis of the interventions is social cognitive theory and the reasoned action approach, which is an extension of the theory of planned behavior and the theory of reasoned action. Men will complete self-report measures via audio computer-assisted self-interviewing at baseline and immediately post and 6 and 12 months post-intervention. The trial will test whether the STAND HIV Risk Reduction Intervention as compared with the No-Intervention Control Condition, increases consistent condom use, the primary outcome. Secondary outcomes include unprotected intercourse, multiple sexual partners, insertive anal intercourse, and proportion condom-protected intercourse. The trial will also test whether STAND's efficacy is greater among men in the Text Messaging Intervention compared with men not receiving text messages. This will provide information on the utility of a low-cost strategy to extend an intervention's efficacy. Finally, the study will test for mediation of intervention effects: the hypothesis that STAND affects outcome expectancies and self-efficacy, which, in turn, affect consistent condom use.