Induction of antigen specific immunologic tolerance

A - Human Necessities – 61 – K

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A61K 39/00 (2006.01) A61K 31/522 (2006.01) A61K 31/7024 (2006.01) A61K 38/00 (2006.01) A61K 38/11 (2006.01) A61K 38/13 (2006.01) A61K 38/17 (2006.01) A61K 38/28 (2006.01) A61K 38/43 (2006.01) A61K 39/395 (2006.01)

Patent

CA 2492394

Antigen specific immune tolerance is induced in a mammalian host by administration of a toleragen in combination with a regimen of immunosuppression. The methods optionally include a preceding conditioning period, where immunosuppressive agents are administered in the absence of the toleragen. After the tolerizing regimen, the host is withdrawn from the suppressive agents, but is able to maintain specific immune tolerance to the immunogenic epitopes present on the toleragen. Optimally, the toleragen will have high uptake properties that allow uptake in vivo at low concentrations in a wide variety of tolerizing cell types.

Selon la présente invention, une tolérance immunitaire spécifique d'antigènes est induite chez un hôte mammalien par administration d'un tolérogène en combinaison avec un régime d'immunosuppression. Ces méthodes comprennent facultativement une période de conditionnement antérieure, au cours de laquelle des agents immunosuppresseurs sont administrés en l'absence du tolérogène. Après le régime de tolérance, l'hôte est retiré des agents suppresseurs, mais il est capable de maintenir une tolérance immunitaire spécifique vis-à-vis des épitopes immunogéniques présents sur le tolérogène. De façon optimale, le tolérogène présente des propriétés de reprise élevée qui lui permettent de reprendre in vivo à des concentrations basses dans une grande variété de types cellulaires de tolérance.

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