Polypeptides, derivatives and uses thereof

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Peptide containing doai

Reexamination Certificate

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C514S002600, C514S017400, C530S300000, C530S330000, C530S331000, C530S333000, C530S345000

Reexamination Certificate

active

07622446

ABSTRACT:
The invention provides a compound having formula X1-Arg-Xaa-Arg-X2in which X1and X2are up to 30 amino acid residues and Xaa is an amino acid residue. A preferred compound is the tripeptide Arg-Glu-Arg which corresponds to amino acid residues 328 to 330 of human amyloid precursor protein. The invention further provides a derivative of a polypeptide having the formula: X1-Arg-Xaa-Arg-X2wherein X1and X2, which may be the same or different, each represents from zero to 30 natural or synthetic amino acid residues or derivatives thereof and Xaa represents a natural or synthetic amino acid residue or derivative thereof, at least one functional group of at least one said amino acid residue or derivative thereof being protected by a protective group. The compounds of the invention are believed to be useful in the treatment of Alzheimer's disease and as cognitive enhancers.

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