Track topics on Twitter Track topics that are important to you
There are a number of studies being performed to test HIV vaccines. The vaccines that seem to be the most promising are canarypox vaccines, known as ALVAC vaccines. The three experimental HIV vaccines used in this study are called ALVAC-HIV vCP205, HIV-1 SF-2 p24, and HIV-1 SF-2 rgp120. The HIV-1 SF-2 p24 and HIV-1 SF-2 rgp120 vaccines are mixed with an adjuvant, which is a substance that increases immune response.
There are currently several Phase I and II clinical trials being performed within AVEG to evaluate different HIV-1 vaccine candidates. The HIV-1 vaccination approach that is furthest along the clinical development pathway is the so-called prime-boost regimen of live recombinant canarypox priming (ALVAC-HIV vCP205) with recombinant subunit protein boosting (HIV-1 SF-2 rgp120 in MF59 adjuvant). The protein boost enhances neutralizing antibody responses against laboratory strains of HIV-1 in assays performed in vitro, as well as enhancing CD4 cell response and increasing the frequency of CD8 cytotoxic T lymphocytes (CTLs). In all of the ALVAC-HIV trials of the prime-boost regimen completed to date, the protein boost has been the HIV-1 SF-2 rgp120 subunit protein. This study is designed to explore whether boosting of live recombinant canarypox vaccination with a novel protein subunit, recombinant HIV-1 SF-2 p24, can enhance the CD4 and CD8 cell responses directed against HIV-1 antigens.
Volunteers are randomized to 1 of 5 groups. All volunteers receive a total of 4 immunizations, administered at Months 0, 1, 3, and 6. Each group receives a different combination of vaccines as follows:
Group 1: ALVAC-HIV vCP205 plus HIV-1 SF-2 p24. Group 2: ALVAC-HIV vCP205 plus MF59 adjuvant and citrate vehicle (control for HIV-1 SF-2 p24 and HIV-1 SF-2 rgp120) at Months 0 and 1; then ALVAC-HIV vCP205 plus HIV-1 SF-2 p24 at months 3 and 6.
Group 3: ALVAC-HIV vCP205 plus control at Months 0 and 1; then ALVAC-HIV vCP205 plus HIV-1 SF-2 p24 combined with HIV-1 SF-2 rgp120 at Months 3 and 6.
Group 4: ALVAC-HIV vCP205 plus control at Months 0 and 1; then ALVAC-HIV vCP205 plus HIV-1 SF-2 rgp 120 at Months 3 and 6.
Group 5: ALVAC-RG vCP65 (control for ALVAC-HIV vCP205) plus control at Months 0,1,3, and 6.
The study lasts for approximately 18 months; patients receive clinical evaluations to measure vaccine safety at 11 study visits at specified time intervals.
Endpoint Classification: Safety Study, Masking: Double-Blind, Primary Purpose: Prevention
HIV p24/MF59 Vaccine, ALVAC-HIV MN120TMG (vCP205), ALVAC-RG Rabies Glycoprotein (vCP65), rgp120/HIV-1 SF-2
Univ of Alabama at Birmingham
Active, not recruiting
National Institute of Allergy and Infectious Diseases (NIAID)
Published on BioPortfolio: 2014-08-27T03:59:50-0400
To evaluate the safety and immunogenicity of ALVAC-HIV MN120TMG (vCP205) in comparison to ALVAC-RG rabies glycoprotein (vCP65) as a control when administered in HIV-1 negative volunteers. ...
To evaluate the safety and immunogenicity of high-titered ALVAC-HIV MN120TMG (vCP205) given sequentially or simultaneously with rgp120/HIV-1SF2 in MF59 adjuvant emulsion in HIV-negative vo...
The purpose of this study is to see if it is safe to give ALVAC-HIV vCP205, a possible HIV vaccine, and to study the immune responses in adult HIV-1 uninfected volunteers. Uganda has been...
The purpose of this study is to see if it is safe to give an HIV vaccine (vCP205) to volunteers who received an HIV vaccine at least 2 years ago, and to study how the immune system respond...
The purpose of this study is to find out whether three different anti-HIV vaccines are safe and whether they help prevent HIV infection. These vaccines are called vCP205, vCP1433, and vCP1...
The concerns raised from adenovirus 5 (Ad5)-based HIV vaccine clinical trials, where excess HIV infections were observed in some vaccine recipients, have highlighted the importance of understanding ho...
Sexual transmission is the principal driver of the human immunodeficiency virus (HIV) pandemic. Understanding HIV vaccine-induced immune responses at mucosal surfaces can generate hypotheses regarding...
Although effective rabies virus vaccines have been existing for decades, each year, rabies virus infections still cause around 50.000 fatalities worldwide. Most of these cases occur in developing coun...
An HIV-1 vaccine continues to be a major target to halt the AIDS pandemic. The limited efficacy of the RV144 phase III clinical trial with the canarypox virus-based vector ALVAC and a gp120 protein co...
Rabies vaccine administration is the most effective method to prevent the occurrence of rabies disease. However, administration of rabies vaccine without adjuvant always shows low efficiency. As a mem...
Vaccines or candidate vaccines used to prevent and treat RABIES. The inactivated virus vaccine is used for preexposure immunization to persons at high risk of exposure, and in conjunction with rabies immunoglobulin, for postexposure prophylaxis.
A genus of the family RHABDOVIRIDAE that includes RABIES VIRUS and other rabies-like viruses.
A combined vaccine used to prevent infection with diphtheria and tetanus toxoid. This is used in place of DTP vaccine (DIPHTHERIA-TETANUS-PERTUSSIS VACCINE) when PERTUSSIS VACCINE is contraindicated.
The type species of LYSSAVIRUS causing rabies in humans and other animals. Transmission is mostly by animal bites through saliva. The virus is neurotropic multiplying in neurons and myotubes of vertebrates.
A live vaccine containing attenuated poliovirus, types I, II, and III, grown in monkey kidney cell tissue culture, used for routine immunization of children against polio. This vaccine induces long-lasting intestinal and humoral immunity. Killed vaccine induces only humoral immunity. Oral poliovirus vaccine should not be administered to immunocompromised individuals or their household contacts. (Dorland, 28th ed)
An antibody is a protein produced by the body's immune system when it detects harmful substances, called antigens. Examples of antigens include microorganisms (such as bacteria, fungi, parasites, and viruses) and chemicals. Antibodies may be produc...
Human Immuno Deficiency Virus (HIV)
Human Immunodeficiency Virus (HIV), the causative agent of AIDS. The Human Immunodeficiency Virus, more commonly known as HIV, is a member of the lentivirus sub-set of the retrovirus family of pathogens. It causes AIDS, or Acquired Immuno Deficiency Sy...