Antigenic complex comprising immunostimulatory peptide, cd4,...

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 19/00 (2006.01) A61K 39/00 (2006.01) A61P 31/18 (2006.01) C07K 14/705 (2006.01) C07K 14/73 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2330235

The invention provides peptides comprising a sequence homologous to a portion of the CDR-2 like domain of CD4, covalently linked to a helper T cell epitope, and optionally to other immunostimulatory sequences as well. The invention provides for the use of such peptides as immunogens to elicit the production in mammals of high titer polyclonal auto-antibodies, which are specific to CD4 surface complex. These auto-antibodies prevent binding of HIV viral particles to CD4+ cells. The peptides are useful in pharmaceutical compositions, to provide an immunotherapy for HIV infection and to protect against HIV infection.

L'invention concerne des peptides comprenant une séquence homologue par rapport à une partie du domaine semblable à CDR-2 de CD4, et présentant une liaison covalente avec un déterminant antigénique de cellule T auxiliaire, ainsi qu'éventuellement avec d'autres séquences immunostimulatrices. Elle concerne l'utilisation de ces peptides en tant qu'immunogènes afin de provoquer la production chez des mammifères d'un titre important d'auto-anticorps polyclonaux spécifiques pour un complexe de surface de CD4. Ces auto-anticorps empêchent la fixation de particules virales de VIH à des cellules de CD4+. Ces peptides sont utiles dans des compositions pharmaceutiques afin d'exercer une immunothérapie et une protection contre l'infection par VIH.

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