Mucosal dtpa vaccines

A - Human Necessities – 61 – K

Patent

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Details

A61K 39/116 (2006.01) A61K 39/106 (2006.01) A61K 39/108 (2006.01) A61K 39/39 (2006.01) A61P 31/04 (2006.01)

Patent

CA 2386023

Mucosal DTPa vaccines, especially intranasal vaccines, comprising (a) a diphtheria antigen, a tetanus antigen and an acellular pertussis antigen, and (b) a detoxified mutant of cholera toxin (CT) or E.coli heat labile toxin (LT). Component (b) acts as a mucosal adjuvant. The acellular pertussis antigen preferably comprises pertussis holotoxin (PT) and filamentous haemagglutinin (FHA) and, optionally, pertactin. The mucosally-delivered combined DTPa formulation is capable of generating a level of protection against B.pertussis infection equivalent to that observed by alum-adjuvanted parenteral administration.

Cette invention concerne des vaccins DTPa administrés par les muqueuses, en particulier des vaccins intranasaux, comprenant (a) un antigène de la diphtérie, un antigène du tétanos et un antigène acellulaire de la coqueluche acellulaire, et (b) un mutant détoxifié de la toxine du choléra (CT) ou une toxine thermolabile deE.coli (LT). Le composant (b) agit comme un adjuvant pour les muqueuses. L'antigène acellulaire de la coqueluche comprend de préférence une holotoxine de la coqueluche, une hémo-agglutinine filamenteuse et éventuellement de la pertactine. La formulation DTPa combinée administrée dans les muqueuse assure un niveau de protection contre l'infection par B.pertussis équivalent à celui d'une administration parentérale avec adjuvant alun.

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