Abstract
We have prepared a retroviral expression construct, pPS-IL-2, in which human IL-2 cDNA has been inserted into the polylinker region, and have used the retroviral vector to introduce the functional IL-2 gene into a fibroblast cell line, RAT-1. Peritumoral administration of IL-2-producing RAT-1 cells into congenitally athymic (nu/nu) mice carrying subcutaneous transplants of human carcinoma cells inhibited the growth of the human tumour xenografts.
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