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Updated: Aug 10, 2026
Experimental Metastasis and CTL Adoptive Transfer Immunotherapy Mouse Model
Published on: November 26, 2010
[Model studies on virus-induced tumors and their immunological treatment (author's transl)]
Abstract:
After a review of the general biological properties of C-type oncorna viruses, results are presented on the structure of an exogenous murine leukemia virus (FLV) and on the serobiological properties of its structural proteins. Our findings suggested a major role of the viral surface glycoprotein gp71 in immunological defense mechanisms. This was confirmed by vaccination experiments with isolated gp71 in mice. The induced immunity was highly specific and not operative against endogenous murine C-viruses belonging to other serotypes. Surprisingly the latter were found to be activated by the vaccination with gp71 of FLV. In heterologous animal species isolated FLV-gp71 induced the formation of broadly reacting antibodies. They were found to be effective in the therapy of infections with FLV in mice as well as with feline leukaemia virus in cats. Most impressive results were obtained with an antiserum prepared against feline leukaemia virus in a goat. This serum completely suppressed sarcomas induced by infection with feline sarcoma virus.
Insights
The surface glycoprotein gp71 of feline leukemia virus (FLV) is crucial for immune defense and can be used for vaccination and therapy against FLV and feline sarcoma virus infections.
Area of Science:
- Virology
- Immunology
- Oncology
Context:
- C-type oncornaviruses, including feline leukemia virus (FLV), are significant pathogens.
- Understanding viral structure and serobiological properties is key to developing countermeasures.
- Exogenous murine leukemia virus (FLV) serves as a model for studying C-type oncornaviruses.
Purpose:
- To investigate the structure and serobiological properties of feline leukemia virus (FLV) structural proteins.
- To evaluate the role of the viral surface glycoprotein gp71 in immunological defense.
- To explore the therapeutic potential of FLV-gp71 in vaccination and antibody-based treatments.
Summary:
- The study identified the viral surface glycoprotein gp71 of FLV as a key player in immunological defense mechanisms.
- Vaccination experiments with isolated gp71 in mice confirmed its role, inducing specific immunity against FLV.
- Surprisingly, FLV-gp71 vaccination activated endogenous murine C-viruses of other serotypes.
- Interspecies studies showed FLV-gp71 induced broadly reactive antibodies effective in treating FLV infections in mice and feline leukemia virus in cats.
- An antiserum against feline leukemia virus completely suppressed feline sarcoma virus-induced sarcomas.
Impact:
- FLV-gp71 is a promising target for developing vaccines and immunotherapies against retroviral infections.
- The findings have implications for understanding cross-serotype immune responses and potential viral activation.
- This research contributes to the development of novel strategies for controlling feline leukemia virus and feline sarcoma virus.
- The study highlights the potential of broadly reactive antibodies in treating retroviral diseases across different species.
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