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. 1971 Jun;7(6):770–775. doi: 10.1128/jvi.7.6.770-775.1971

Transformation of Murine Cells by Two “Slow Viruses,” Visna Virus and Progressive Pneumonia Virus

Kenneth K Takemoto 1, Lawrence B Stone 1
PMCID: PMC356196  PMID: 4998321

Abstract

Visna and progressive pneumonia virus (PPV), two antigenically related, non-oncogenic “slow viruses” which have ribonucleic acid (RNA)-dependent deoxyribonucleic acid (DNA) polymerase activity, were examined for their ability to transform cells. Murine cells which had been exposed to either visna or PPV developed foci of altered, spindle-shaped cells 3 to 4 weeks after infection. Visna and PPV transformed lines were established from these cultures. There was no evidence that other oncogenic DNA or RNA viruses were involved in the observed transformation. Visna or PPV could be “rescued” from all transformed lines by co-cultivation with normal sheep testis cells. “Rescued” virus was identified as visna or PPV, and they retained the capacity to transform mouse cells. These experiments may have important implications in the understanding of both viral carcinogenesis and “slow” viral infections.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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