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Updated: Aug 17, 2026

Production of Replication-Defective Retrovirus by Transient Transfection of 293T cells
Published on: December 4, 2007
[Isolation and characterization of retroviruses expressed in murine osteosarcomas induced by 90Sr]
Abstract:
The induction of osteosarcomas with 90Sr in CF1 mice is associated with the expression of ecotropic type-C RNA viruses devoid of sarcomatogenic activity. In contrast, the FBR murine osteosarcoma virus complex, isolated from a 90 Sr-induced osteosarcoma of a X/Gf mouse [M. Finkel et al. (1)], causes the rapid appearance of osteosarcomas in newborn mice and transforms fibroblasts in vitro. The transforming capacity of FBR murine sarcoma virus has been associated as an oncogene homologous to v-fos.
Insights
Strontium-90 (90Sr) induces osteosarcomas in mice, linked to non-sarcomagenic viruses. However, the FBR murine osteosarcoma virus complex rapidly causes tumors and transforms cells, driven by a v-fos oncogene.
Area of Science:
- Oncology
- Virology
- Genetics
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