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Molecular cloning of feline leukemia provirus genomes integrated in the feline large granular lymphoma cells

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Summary

Feline leukemia virus (FeLV) is a horizontally transmitted agent of the domestic cat which is known to be associated with wide spectrum of diseases of the hematopoietic system. In the present study, proviral DNAs of FeLV proviruses were examined in the tumor cells of natural killer cell lineage which is very rare in cats. In the chromosomal DNA of the tumor cells, 5 distinct bands corresponding to exogenous FeLV provirus genomes were detected by digestion withEcoRI which does not cut most FeLV isolates. Five clones of pLC1, pLC2, pLC3, pLC4, and pLC5 obtained from the 5 respective bands were analysed by restriction endonuclease mapping and Southern blot hybridization using gene-specific probes of FeLV. The results have clearly demonstrated that pLC4 and pLC5 contained large deletions in thepol and part ofgag regions, while the full-length proviruses could be observed in pLC1 and pLC2. Furthermore, pLC3 contained part of a variant FeLV genome having anEcoRI site in itsgag region. The molecular clones of defective and variant FeLV in this study may be useful for the further examination of tumorigenesis of large granular lymphoma in the cat.

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Matsumoto, Y., Tsujimoto, H., Fukasawa, M. et al. Molecular cloning of feline leukemia provirus genomes integrated in the feline large granular lymphoma cells. Archives of Virology 111, 177–185 (1990). https://doi.org/10.1007/BF01311052

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  • DOI: https://doi.org/10.1007/BF01311052

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