Association of endogenous retroviruses with radiation-induced leukemias of BALB/c mice
- PMID: 6157834
- PMCID: PMC288589
- DOI: 10.1128/JVI.33.2.652-660.1980
Association of endogenous retroviruses with radiation-induced leukemias of BALB/c mice
Abstract
X-irradiation of BALB/c mice in the second month of life induced a high incidence of generalized lymphatic leukemia of T-cell origin, beginning at 7 months of age. Infectious ecotropic murine leukemia virus (B-tropic predominant over N-tropic) was isolable from all tumor extracts but exhibited a wide titer range among individual leukemias. Detection of infectious xenotropic virus usually required extensive amplification on indicator cells. Dual-tropic (mink cell focus-forming) virus has not been found in the leukemias. Expression of ecotropic virus in tail extracts prepared at 6.5 months of age, although greatly enhanced compared with unirradiated controls, was not found to be prognostic of tumor development in individual mice. We conclude that leukemogenesis does not show a simple dependence on infectious murine leukemia virus expression in these mice.
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