Composite peptide compounds for diagnosis and treatment of...

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 14/47 (2006.01) A61K 47/48 (2006.01) C07K 16/18 (2006.01) C07K 19/00 (2006.01) G01N 33/68 (2006.01)

Patent

CA 2496952

The present invention relates to diseases caused by prion proteins, Novel composite peptide compounds are disclosed which comprise two or more peptides or peptide fragments optionally linked to a backbone and the peptides or peptide fragments are spatially positioned relative to each other so that they together form a non-linear sequence which mimics the tertiary structure of one or more PrPSc-specific epitopes as evidenced by the test described herein. The use of such conjugates as immunogens for the production of antibodies that specifically bind to the pathogenic form of a prion protein is revealed. Other uses of the composite peptide compounds are also disclosed, such as use in diagnostic assays, production of antibodies and uses as vaccine immunogens for the prophylactic protection and therapeutic treatment of subjects against transmissible prion disease.

L'invention concerne des maladies induites par des protéines prions, ainsi que des composés peptidiques composites contenant deux ou plusieurs polypeptides ou des fragments de polypeptides éventuellement liés à une structure et des peptides ou des fragments de peptides positionnés spatialement les uns par rapport aux autres de sorte qu'ils forment, entre eux, une séquence non linéaire, laquelle imite la structure tertiaire d'un ou plusieurs épitopes spécifiques PrP?Sc¿ tels que mis en évidence par le test décrit dans cette application. L'utilisation de ces conjugués en tant qu'immunogènes dans la production d'anticorps se liant de manière spécifique à une forme pathogénique d'une protéine prions est détectée. L'invention concerne également d'autres utilisations de ces composés peptidiques composites, notamment dans des méthodes diagnostiques, dans la production d'anticorps et en tant qu'immunogènes de vaccin destinés à la protection prophylactique et au traitement thérapeutique de sujets contre la maladie à prions transmissible.

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