Re-boosting of HIV-1 Infected Subjects With Vacc-4x

Summary

During the course of HIV infection the number of CD4 cells decreases, resulting in a reduced immunological response and eventually immune deficiency. Vacc-4x is a peptide-based HIV immunotherapy vaccine and is anticipated to strengthen the immune system's response to HIV. All patients participating in this trial have previously received the vacc-4x vaccine in order to reduce the amount of HIV-1 virus in the blood and increase the immune response. The primary objective of this study is to evaluate if a re-boost with Vacc-4x could further reduce the amount of HIV-1 virus and increase the immune response.

Timeline

Start

2012-12

Primary completion

2014-01

Completion

2014-01

Publications

• Background Kran AM, Sommerfelt MA, Baksaas I, Sorensen B, Kvale D. Delayed-type hypersensitivity responses to HIV Gag p24 relate to clinical outcome after peptide-based therapeutic immunization for chronic HIV infection. APMIS. 2012 Mar;120(3):204-9. doi: 10.1111/j.1600-0463.2011.02843.x. Epub 2011 Nov 27.
• Background Lind A, Sommerfelt M, Holmberg JO, Baksaas I, Sorensen B, Kvale D. Intradermal vaccination of HIV-infected patients with short HIV Gag p24-like peptides induces CD4 + and CD8 + T cell responses lasting more than seven years. Scand J Infect Dis. 2012 Aug;44(8):566-72. doi: 10.3109/00365548.2011.653581. Epub 2012 Feb 19.
• Background Jones T. Vacc-4x, a therapeutic vaccine comprised of four engineered peptides for the potential treatment of HIV infection. Curr Opin Investig Drugs. 2010 Aug;11(8):964-70.
• Background Kran AM, Sorensen B, Sommerfelt MA, Nyhus J, Baksaas I, Kvale D. Long-term HIV-specific responses and delayed resumption of antiretroviral therapy after peptide immunization targeting dendritic cells. AIDS. 2006 Feb 28;20(4):627-30. doi: 10.1097/01.aids.0000210620.75707.ac.
• Rockstroh JK, Asmuth D, Pantaleo G, Clotet B, Podzamczer D, van Lunzen J, Arasteh K, Mitsuyasu R, Peters B, Silvia N, Jolliffe D, Okvist M, Krogsgaard K, Sommerfelt MA. Re-boost immunizations with the peptide-based therapeutic HIV vaccine, Vacc-4x, restores geometric mean viral load set-point during treatment interruption. PLoS One. 2019 Jan 30;14(1):e0210965. doi: 10.1371/journal.pone.0210965. eCollection 2019.

Drugs

Indications