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Feline sarcoma virus induced in vitro progression from premalignant to neoplastic transformation of human diploid cells

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Summary

Human diploid cells morphologically transformed by feline sarcoma virus were serially propagated under selective cell culture conditions. When injected into nude mice prior to passage in soft agar (0.35%), morphologically transformed cells did not produce tumors. However, when propagated under selective cell culture conditions, transformed cells grew in soft agar and, when injected subcutaneously into the subcapsular region of the nμ/nμ mice, produced neoplastic nodules histopathologically interpreted as fibromas. Karyological examination of cell populations grown out from the tumors confirmed that the tumors were composed of human cells. Examination of electron micrographs of the excised tumor tissue revealed the presence of budding virus particles. Tumor cells isolated from nude mice and morphologicaly transformed cells both contained the feline concornativirus-associated cell membrane antigen. It was concluded that expression of feline oncornavirus-associated cell membrane antigen is associated with an early stage of feline rerovirus-induced carcinogenesis, namely focus formation. In addition, it was shown that FeLV-FeSV can induce morphological transformation in human cells in vitro and that there is a requirement for the cells to passage through soft agar before subsequent tumor formation (neoplastic transformation) can be demonstrated.

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This work was supported in part by NIH-NCI RO1-259007, NO1-CP-3571 and CPV08 103563, and Air Force F49620-77-C-110.

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Milo, G.E., Olsen, R.G., Weisbrode, S.E. et al. Feline sarcoma virus induced in vitro progression from premalignant to neoplastic transformation of human diploid cells. In Vitro 16, 813–822 (1980). https://doi.org/10.1007/BF02619317

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  • DOI: https://doi.org/10.1007/BF02619317

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