Epitope peptides derived from vascular endothelial growth factor receptor 1 and vaccines containing these peptides

Abstract

The present invention provides immunogenic peptides comprising the amino acid sequence of SEQ ID NO: 1, 2, 13, 32, and peptides comprising the above-mentioned amino acid sequences in which 1, 2, or several amino acids are substituted or added, and having cytotoxic T cell inducibility, and also provides drugs for treating or preventing tumors comprising these peptides. The peptides of this invention can be used as vaccines.

1 . A method of treating angiogenesis-mediated disease in a subject comprising administering to the subject a composition comprising a peptide selected from the group consisting of:
 (a) an isolated peptide consisting of the amino acid sequence of SEQ ID NO: 1,   (b) an isolated peptide having cytotoxic T cell inducibility, wherein the peptide consists of the amino acid sequence of SEQ ID NO: 1, in which 1 or 2 amino acids are substituted,   and wherein the second amino acid from the N terminus is leucine or methionine, and the C-terminal amino acid is valine or leucine.   
     
     
         2 . The method of  claim 1 , wherein the angiogenesis-mediated disease is selected from the group consisting of diabetic retinopathy, chronic rheumatoid arthritis, psoriasis, and atherosclerosis. 
     
     
         3 . A method of inhibiting angiogenesis at a diseased site in a subject comprising administering to the subject a composition comprising a peptide selected from the group consisting of:
 (a) an isolated peptide consisting of the amino acid sequence of SEQ ID NO: 1,   (b) an isolated peptide having cytotoxic T cell inducibility, wherein the peptide consists of the amino acid sequence of SEQ ID NO: 1, in which 1 or 2 amino acids are substituted,   and wherein the second amino acid from the N terminus is leucine or methionine, and the C-terminal amino acid is valine or leucine, as the active ingredient.   
     
     
         4 . The method of  claim 3 , wherein the subject expresses HLA-A02. 
     
     
         5 . The method of  claim 3 , wherein the diseased site comprises a malignant tumor or metastasis of a malignant tumor. 
     
     
         6 . The method of  claim 3 , wherein the diseased site comprises VEGFR1 expressing cells.