The present invention relates to an active polypeptide including the amino acid sequence of SEQ ID NO:3, or having at least 50%, preferably 70%, more preferably 90% identity with the amino acid sequence of SEQ ID NO:3, or fragments thereof having at least 21 contiguous amino acids, or peptides having at least 50%, preferably 70%, more preferably 90% identity with the amino acid sequence of the fragments, provided that the polypeptide is not SEQ ID NO:2, variants and antigenic fragments thereof, SEQ ID NO 16 or SEQ ID NO 17, and uses thereof in a method of treating cancer and/or tumours of the human or animal body.
