Method for examining therapeutic effect on cancer and composition for inducing immune response

A reagent kit for examining cancer treatment effect, comprising:

• a support having immobilized thereon at least one selected from the group consisting of cancer/testis antigen, a peptide formed of part of cancer/testis antigens, p53, and a peptide formed of part of p53;
• a reagent containing an anti-human IgG antibody;
• and
• a reagent containing an anti-human IgA antibody.

At least one peptide selected from the group consisting of the following items a) to f):

• a) a peptide formed of part of XAGE1 formed of an amino acid sequence set forth in SEQ ID NO:
• 3, the peptide having an amino acid sequence that allows extension and/or deletion of up to five amino acids at an N-terminal side and/or a C-terminal side of an amino acid sequence set forth in SEQ ID NO:
• 1;
• b) a peptide with an amino acid sequence obtained by conservatively substituting one or two amino acids in the amino acid sequence of the peptide of the item a);
• c) a pharmaceutically acceptable salt or solvate of the peptide of the item a) or b);
• d) a peptide formed of part of XAGE1 formed of the amino acid sequence set forth in SEQ ID NO:
• 3, the peptide having an amino acid sequence that allows extension and/or deletion of up to five amino acids at an N-terminal side and/or a C-terminal side of an amino acid sequence set forth in SEQ ID NO:
• 2;
• e) a peptide with an amino acid sequence obtained by conservatively substituting one or two amino acids in the amino acid sequence of the peptide of the item d);
• and
• f) a pharmaceutically acceptable salt or solvate of the peptide of the item d) or e).