Suppression of retroviral tumors in hosts immune to viral oncogene product
1994
Feline sarcoma virus of Snyder-Theilen strain (ST-FeSV) induces sarcomas in Wistar/Ma rats following neonatal virus injection. Induced tumors express the viral oncogene product (P85) and elicit in hosts the specific serum anti-P85 antibody detectable by Western blot analysis. Syngeneic adult female rats were immunized with an ST-FeSV induced sarcoma that was 100% transplantable to syngeneic adult rats. Newborns from immunized rats (vaccinated rats) were found to carry anti-P85 in their sera at birth. Following neonatal injection of the virus to vaccinated and non-vaccinated control rats, tumor incidence was found 0 be lower and survival time significantly longer in vaccinated rats than in controls (p<0.01). A nonapeptide known to be thymic hormone (FTS) showed suppressive effects on tumor development
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