HS-tk vector bearing the gene for thymidine kinase: Began Phase I/II trial in 15 patients, with direct injection of the vector into tumor, followed by treatment

Genetic Therapy Inc. (GTII), Gaithersburg, Md. Product: HS-tk vector bearing the gene for thymidine kinase, which confers sensitivity to the anti-viral drug ganciclovir Indication: Inoperable brain ma...