Abstract
The inoculation of a mixture of drugs and guinea pig hepatoma cells (line-10) induced tumor-specific immunity in about 20% of guinea pigs. When guinea pigs with established intradermal tumors were given various drugs ip, no cures were observed; in contrast, multiple intralesional injections of actinomycin D, 1,3-bis(2-chlorethyl)-1-nitrosourea, adriamycin, mitomycin C, and melphalan were effective in curing animals of their intradermal tumors at a time when there were tumor cells in the draining lymph nodes; dimethyl-triazenoimidazole carboxamide, methotrexate, 5-fluorouracil, and 6-mercaptopurine were not effective. More than 80% of the cured animals were immune to rechallenge with 10(6) line-10 tumor cells.
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