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  • Title: Feline oncornavirus-associated cell membrane antigen. V. Humoral immune response to virus and cell membrane antigens in cats inoculated with Gardner-Arnstein feline sarcoma virus.
    Author: Schaller JP, Essex M, Yohn DS, Olsen RG.
    Journal: J Natl Cancer Inst; 1975 Dec; 55(6):1373-8. PubMed ID: 1206756.
    Abstract:
    Tumor growth responses in 5- to 6-week-old kittens inoculated with the Gardner-Arnstein strain of feline sarcoma virus exhibited three distinct pattern: 1) complete tumor regression or no detectable tumor growth in approximately one-third of 43 inoculated kittens, 2) rapid tumor progression which led to debilitation and death within 16.2 +/- 4.2 weeks following infection in an additional one-third, and 3) slow tumor growth or temporary regressions in the remaining third. The feline oncornavirus-associated cell membrane antigen (FOCMA) antibody response was closely correlated with tumor progression; rapid progressors had the lowest antibody titers, whereas those in the "no tumor or permanent regression" categories had the highest titers. These results agreed with those previously observed with another virus strain, the Snyder-Theilen feline sarcoma virus. Cats in the intermediate categories of tumor growth also had intermediate levels of FOCMA antibody. The presence of virus-neutralizing (VN) activity was not always correlated with anti-FOCMA activity. Animals in the rapid-progressor category, compared to the regressors or slow progressors, were more likely to have detectable VN antibody during early periods. Conversely, animals in the regressor group or group with no tumors were more likely to show an early rise in detectable anti-FOCMA activity than animals in either of the progressor groups.
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