Observational Study of the Preventive Trial With HIV-1 Tat Protein

Observational Study of the Phase I Safety and Immunogenicity Trial of Recombinant HIV-1 Tat in HIV-1 Uninfected Adult Volunteers

The results of the Phase I Safety and Immunogenicity Trial of Recombinant HIV-1 Tat (ISS P-001 and ISS T-001) indicate that the vaccine based on the recombinant Tat protein is safe, well tolerated and immunogenic. The present study is intended to extend the follow-up of the volunteers for additional 3 years to evaluate the persistence of the anti-Tat humoral and cellular immune response. The results of the present study will be key for the design of future phase II trials, particularly for the definition of the optimal schedule for boosting immunizations.

All individuals (20) will be enrolled in a 120-weeks observational study and monitored every 24 weeks for the following 3 years. During these visits, in addition to the hematological and biochemical assessment, the anti-Tat specific humoral and cellular immune responses will be evaluated.

Inclusion Criteria:

• Previous participation to the Phase I Clinical Trial ISS P-001