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. 1986 Dec;60(3):868–873. doi: 10.1128/jvi.60.3.868-873.1986

Rat embryo fibroblast cells expressing human papillomavirus 1a genes exhibit altered growth properties and tumorigenicity.

M Green, K H Brackmann, P M Loewenstein
PMCID: PMC253308  PMID: 3023676

Abstract

Human papillomavirus 1a (HPV1a) induces benign tumors (papillomas or warts) in humans under natural conditions of infection but has not been found to replicate significantly in cell culture or in experimental animals. To establish model systems to study the oncogenic properties and expression of HPV genes, we established cell lines by cotransfecting the 3Y1 rat fibroblast cell line with HPV1a DNA constructs containing an intact early gene region and the Tn5 neomycin resistance gene. Most cell lines selected for expression of the neomycin resistance gene by treatment with the antibiotic G-418 contained viral DNA in a high-molecular-weight form. The growth characteristics of several cell lines containing high copy numbers of HPV1a DNA were studied further. They were shown to differ from the parental cell line and from G-418-resistant cell lines that did not incorporate viral DNA in the following properties: morphological alteration, increased cell density at confluence, growth in 0.5% serum, efficient anchorage-independent growth in soft agar, and rapid formation of tumors in nude mice. Those cell lines that possessed altered growth properties and tumorigenicity were found to express abundant quantities of polyadenylated virus-specific RNA species in the cytoplasm.

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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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