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. 1991 Oct;65(10):5203–5210. doi: 10.1128/jvi.65.10.5203-5210.1991

Cellular ras gene activity is required for full neoplastic transformation by polyomavirus.

L Raptis 1, R Marcellus 1, M J Corbley 1, A Krook 1, J Whitfield 1, S K Anderson 1, T Haliotis 1
PMCID: PMC248998  PMID: 1654439

Abstract

To investigate the role of ras gene activity in cellular transformation by polyomavirus, murine C3H10T1/2 cells were rendered ras deficient by transfection with an antisense ras gene construct. Ras deficiency resulted in a partial suppression of the polyomavirus-induced transformed phenotype. The production of viral middle T antigen and its association with pp60c-src, increased membrane-associated protein kinase C activity, and morphological transformation were unaffected by the downregulation of c-ras gene expression. On the other hand, stimulated proliferation, focus formation on confluent monolayers of normal cells, and colony formation in soft agar were all greatly reduced in cells containing reduced p21ras levels. It is concluded that ras gene activity is needed for full cell transformation by polyomavirus.

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