TK-gene system (retrovirus transfer of the herpes simplex virus thymidine kinase gene) is one of the much more mature plans. We have succeeded in transmitting herpes TK gene into human pancreatic cancer cells, named SW1990 by retrovirus.

• 由缺陷型逆转录病毒介导的TK基因系统（RV－HSV－TK）是众多肿瘤生物治疗方法中一个技术较为成熟的方案，本实验采用该系统在体外成功地转染了人胰腺癌细胞株SW1990并能够稳定传代培养，转染了TK基因的SW1990细胞（SW±K），其生长曲线与未转染的SW1990细胞无差异。