Modified HCV peptide immunogens

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Amino acid sequence disclosed in whole or in part; or...

Reexamination Certificate

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C424S184100, C424S185100, C424S186100, C424S204100, C424S228100, C435S320100, C536S023720

Reexamination Certificate

active

07341726

ABSTRACT:
Provided are an isolated peptide having the amino acid sequence DLMGYIPAV (SEQ ID NO: 1), an isolated HCV core polypeptide comprising an L→A substitution at amino acid position 139, an isolated HCV core polypeptide having the amino acid sequence of SEQ ID NO: 2, and a fragment of an HCV core polypeptide having fewer amino acids than the entire HCV core polypeptide and comprising the amino acid sequence of SEQ ID NO:1. Also provided are nucleic acids which encode the peptides and polypeptides of this invention, vectors comprising the nucleic acids of this invention and cells comprising the vectors and nucleic acids of this invention. Further provided are methods of producing an immune response in a subject and/or treating or preventing HCV infection in a subject, comprising administering to the subject, or to a cell of the subject, any of the compositions of this invention.

REFERENCES:
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patent: 2005/0222069 (2005-10-01), Punnonen et al.
patent: WO 95/12677 (1995-05-01), None
patent: WO 95/27733 (1995-10-01), None
patent: WO 97/41440 (1997-11-01), None
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Kalams et al., “T Cell Receptor Usage and Fine Specificity of Human Immunodeficiency Virus I—specific Cytotoxic T Lymphocyte Clones,”Journal of Experimental Medicine183:1669-1679 (1996).
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Sarobe et al. “Enhanced in vitro potency and in vivo immunogenicity of a CTL epitope from hepatitis C virus core protein following amino acid replacement at secondary HLA-A2.1 binding positions,”J. Clin. Invest., 102(6):1239-1248 (Sep. 1998).
Shirai et al. “CTL responses of HLA-A2.1-transgenic mice specific for hepatitis C viral peptides predict epitopes for CTL of humans carrying HLA-A2.1,”J. Immund., 154(6):2733-2742 (Mar. 1995).

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