Immunization against the polyoma tumor‐specific transplantation antigen (TSTA) with polyoma T‐antigens

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Abstract
The relationship between the polyoma virus tumor‐specific transplantation antigen (TSTA) and 2 of the virus proteins coded from the early region of polyomavirus was investigated. Mice were immunized with small T antigen and a truncated mutant of middle T antigen, both purified from genetically engineered Escherichia coli. The 2 proteins induced protective immunity against polyomavirus‐induced tumors, but not against non‐polyoma tumors, indicating that one or more of the polyoma T antigens are directly involved in a TSTA function.