Studies of HIV-1 Infection in Newly Infected Individuals in Southern Africa

This study has been completed.
Sponsor:
Information provided by:
National Institute of Allergy and Infectious Diseases (NIAID)
ClinicalTrials.gov Identifier:
NCT00006298
First received: September 26, 2000
Last updated: September 24, 2008
Last verified: July 2004

September 26, 2000
September 24, 2008
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Complete list of historical versions of study NCT00006298 on ClinicalTrials.gov Archive Site
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Studies of HIV-1 Infection in Newly Infected Individuals in Southern Africa
Virological and Immunological Studies of HIV-1 Infection in Newly Infected Individuals in Southern Africa

The main goal of this study is to find out how the immune system responds to a specific type of HIV infection, known as C HIV-1, in order to develop a vaccine against this type of infection. The study involves Southern African populations.

The HIV-1 virus changes rapidly and many different subtypes have been found. In South Africa, limited data have suggested Subtype C HIV-1 is the most common. This study strives to verify the most common subtype and also look at genetic differences and immune responses among newly infected individuals. Results will aid in the development of vaccines specific for certain geographical areas.

HIV-1 evolves rapidly and multiple genetic subtypes have been isolated from a number of geographic locations. There are limited data on the distribution of subtypes in the Southern African HIVNET sites. Data suggest subtype C HIV-1 predominates and this study is designed to substantiate and extend these observations to understand the biological relationship between HIV-1 subtypes, genetic variability, and immune responses. Earlier studies were conducted using individuals who had been seropositive for 3 to 9 years with advanced disease status; this study will test reactivity during the early stage of infection. This will assist in the rational selection of prototypic isolates for inclusion in either a single universal vaccine or vaccines tailored for specific subtypes/geographical regions.

Volunteers are recruited from Malawi, South Africa, Zambia, and Zimbabwe. The earliest possible cases of seroconversion are included. At enrollment, participants are counseled appropriately for their HIV status and demographic information is obtained. Participants are followed quarterly up to 12 months. Epidemiological, clinical, and laboratory data are collected during physical exams and blood draws at each visit. Blood samples are used to assess CD4 counts, plasma viral load, genetic parameters, and individual immune responses. Participants who are seronegative or whose status is unknown are tested for HIV at each visit, with post-test counseling when participants return to the clinic for test results.

In addition to enrolling the HIV-infected and uninfected volunteers, each site contributes a 5-ml blood sample from 50 seronegative individuals for DNA extraction and HLA genotyping.

Observational
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  • HIV Infections
  • HIV Seronegativity
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*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
125
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Inclusion Criteria

Participants may be eligible for this study if they:

  • Are first HIV-negative and later test HIV-positive; or are HIV-positive and have evidence of being HIV-negative within the 8 months prior to first testing HIV-positive; or are HIV-positive with one test and HIV-negative with another test.

Exclusion Criteria

Participants will not be eligible for this study if they:

  • Have a mental disorder that interferes with agreeing to do the study or with participating in the study.
  • Are receiving anti-HIV treatment for more than 4 weeks.
  • Have tuberculosis.
Both
18 Years to 45 Years
Yes
Contact information is only displayed when the study is recruiting subjects
United States
 
NCT00006298
HIVNET 028
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National Institute of Allergy and Infectious Diseases (NIAID)
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Study Chair: Haynes Sheppard
Study Chair: Desmond Martin
Study Chair: Clive Gray
National Institute of Allergy and Infectious Diseases (NIAID)
July 2004

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP