New tumorantigens are continuously being discovered due to the improvement of immunologic techniques.
随着免疫学技术的进步，大量肿瘤抗原不断被发现。
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It has taken several periods before the existence of tumorantigens are proved and their new direction is considered as tumor rejection antigen peptides (TRAP).
Hence, dendritic cells (DC) were cultured and engineered to present tumorantigens to CIK cells hoping that this might enhance the recognition of tumor cells and its subsequent killing.