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Feline lymphomas: immunological and cytochemical characterization
J L Rojko1, G J Kociba, J L Abkowitz
1Department of Veterinary Pathobiology, Ohio State University, Columbus 43210.
Cancer Research
|January 15, 1989
Summary
Feline leukemia virus (FeLV) can cause lymphomas in cats. This study reveals FeLV-induced lymphomas originate from diverse immature cell types, not just mature T-cells, indicating broader precursor involvement in feline cancer.
Area of Science:
- Immunology
- Veterinary Pathology
- Oncology
Background:
- Feline leukemia virus (FeLV) is a known oncogenic retrovirus in cats.
- Previous research suggested FeLV leukemogenesis primarily affects mature T-cells.
- Understanding the cellular origin of FeLV-induced lymphomas is crucial for diagnosis and treatment.
Purpose of the Study:
- To characterize the immunological and cytochemical phenotypes of primary feline lymphomas and lymphoma cell lines.
- To determine the cellular origin of lymphomas induced by different strains of FeLV.
- To re-evaluate the cell types involved in FeLV-induced leukemogenesis.
Main Methods:
- Analysis of immunological markers (surface receptors, Ia antigens).
- Cytochemical staining for terminal deoxynucleotidyl transferase and nonspecific esterase.
- Assessment of cortisone sensitivity.
- Erythrocyte rosette formation assays (guinea pig erythrocytes).
Main Results:
- FeLV-R induced thymic lymphomas exhibit phenotypes of prothymocyte or immature cortical thymocytes.
- Lymphomas associated with other FeLV strains show heterogeneity, suggesting origins from helper T-cells, monocyte/macrophages, or null cells.
- Observed phenotypes include terminal deoxynucleotidyl transferase, Ia antigens, and nonspecific esterase expression.
Conclusions:
- FeLV leukemogenesis is not restricted to mature T-cells.
- Feline lymphomas display significant phenotypic heterogeneity, indicating diverse cellular origins.
- FeLV likely transforms multipotent lymphoid or monocytoid precursors in the bone marrow.