Peptides and method for detecting alzheimer's disease and...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/12 (2006.01) A61K 38/04 (2006.01) A61K 38/17 (2006.01) A61P 25/28 (2006.01) C07K 1/00 (2006.01) C07K 7/06 (2006.01) C07K 7/08 (2006.01) C07K 14/47 (2006.01) C07K 16/18 (2006.01) C12Q 1/68 (2006.01) G01N 33/48 (2006.01) G01N 33/53 (2006.01) G01N 33/68 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2467073

The invention relates to defined peptides and the quantitative determination thereof in the body fluids of patients suffering from Alzheimer's disease in relation to the concentration thereof in a control group of patients who are healthy or suffer from other demential diseases. The inventive peptides originate from the C3f fragment of the complement C3 protein precursor with the corresponding gene and are modified in a specific manner and are optionally post-translationally or chemically modified. Modification occurs with respect to the concentrations of said peptides in patients in a manner which is specific to each peptide when compared with the control group. A specific and significant modification of the concentration of said peptides in relation to the concentration thereof in healthy persons indicates a differentiation with respect to Alzheimer's disease. The invention also relates to the use of said peptides as a progress control, and in the development of diagnostic and therapeutic agents.

L'invention concerne des peptides définis et leur détermination quantitative dans des liquides corporels de patients souffrant de la maladie d'Alzheimer, quant à leur concentration dans un groupe témoin de patients sains ou souffrant d'autres maladies démentielles. Les peptides selon l'invention proviennent du fragment C3f du précurseur protéiniques complément C3 avec le gène correspondant et sont traités de manière spécifique et, le cas échéant, modifiés par post-translation ou modifiés chimiquement. Ils sont modifiés d'une manière spécifique pour chaque peptide, en ce qui concerne leurs concentrations chez des patients, par rapport au groupe témoin. Une modification spécifique et significative des concentrations de ces peptides par rapport à leurs concentrations chez des personnes saines présente une différenciation par rapport à des affections provoquées par la maladie d'Alzheimer. L'invention concerne en outre des utilisations de ces peptides en vue du contrôle de l'évolution, ainsi que pour le développement des diagnostics et des moyens thérapeutiques.

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