"Gene Therapy of Hepatoma: Bystander Effects and Non-Apoptotic Cell Death Induced by Thymidine Kinase and Ganciclovir."

According to the authors' abstract of an article published in Cancer Letters, "A retroviral vector carrying herpes simplex virus thymidine kinase gene was constructed, and transfected into the psi 2 packaging cells. The replication-defective retrovirus produced by this cell line (psi 2tkn cells) was transduced into XC rat hepatoma cells, from which a cell line (XCtkn2) highly sensitive to ganciclovir was cloned. Ganciclovir suppressed the growth of XCtkn2 hepatoma and psi 2tkn cells. Both of these HSV-tk-carrying cells treated with ganciclovir showed potent 'bystander effect' on co-culturing with genetically unmodified XC hepatoma cells. In addition, intratumoral injection of XCtkn2...

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