Cell for use in immunotherapy which contains modified nucleic acid construct encoding wilms tumor gene product or fragment thereof, method for producing said cell, and said nucleic acid construct

A cell for immunotherapy, comprising:

• a nucleic acid construct encoding a Wilms tumor gene product or a fragment of the Wilms tumor gene product,
• the nucleic acid construct including (i) a region encoding a fragment of the Wilms tumor gene product, the fragment being indicated by positions 194 to 493 of SEQ ID NO:
• 1 or by positions corresponding to the positions 194 to 493 of a sequence corresponding to SEQ ID NO:
• 1 and (ii) only one AUG as a functional start codon, connected to a 5′ terminal side of the region via 3m (m is 0 or a positive integer) bases intervening between the 5′ terminal side of the region and the AUG as the functional start codon.