Method of treatment using ligand-immunogen conjugates

A - Human Necessities – 61 – K

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A61K 39/00 (2006.01) A61K 31/02 (2006.01) A61K 31/04 (2006.01) A61K 31/63 (2006.01) A61K 31/655 (2006.01) A61K 38/00 (2006.01) A61K 39/385 (2006.01) A61K 39/39 (2006.01) A61K 39/395 (2006.01)

Patent

CA 2405299

A method and pharmaceutical composition is provided for enhancing the endogenous immune response-mediated elimination of a population of pathogenic cells in a host animal wherein the pathogenic cells preferentially express, uniquely express, or overexpress a binding site for a particular ligand. The invention comprises administering the ligand conjugated to an immunogen to a host animal harboring the population of pathogenic cells. Antibodies, preexisting or administered to the host animal to establish a passive immunity, directed against the immunogen bind to the ligand-immunogen conjugate resulting in elimination of the pathogenic cell by the host's immune response. At least one additional therapeutic factor is administered selected from the group consisting of a cell killing agent, a tumor penetration enhancer, a chemotherapeutic agent, antimicrobial agent, a cytotoxic immune cells, and a compound capable of stimulating an endogenous immune response wherein the compound does not bind to the ligand-immunogen conjugate.

Méthode et composition pharmaceutique favorisant l'élimination endogène, provoquée par la réponse immunitaire, d'une population de cellules pathogènes dans un animal hôte, les cellules pathogènes exprimant de préférence, exclusivement ou surexprimant un site de liaison pour un ligand particulier. La présente invention consiste à administrer le ligand conjugué à un immunogène à un animal hôte porteur de ladite population de cellules pathogènes. Des anticorps, préexistants ou administrés à l'animal hôte pour établir l'immunité passive, et dirigés contre l'immunogène, se lient au conjugué ligand-immunogène, ce qui a pour résultat l'élimination des cellules pathogènes par la réponse immunitaire de l'hôte. Au moins un agent thérapeutique supplémentaire est administré. Ledit agent est sélectionné dans le groupe constitué par un agent tueur de cellules, un agent favorisant la pénétration dans les tumeurs, un agent chimiothérapeutique, un agent antimicrobien, une cellule immunitaire cytotoxique et un composé capable de stimuler une réponse immunitaire endogène, ledit composé ne se liant pas au conjugué ligand-immunogène.

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