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J Virol. 1985 August; 55(2): 500-503

Early clonality and high-frequency proviral integration into the c-myc locus in AKR leukemias.

ABSTRACT

Blot hybridization of thymocyte DNA from AKR/J mice was used to detect new proviral junction fragments as markers of clonality at different stages of viral leukemogenesis and to detect DNA rearrangements at the c-myc locus due to proviral insertion. Clonal populations of thymocytes were observed in mink cell focus-forming virus-injected mice as early as 35 days postinjection, at a stage distinguishable from frank leukemia by flow cytometric analysis and transplantation bioassay. Specific proviral integrations in the c-myc locus were detected in 15% of these early clones and in up to 65% of late-developing thymomas and frank leukemias. Thus, in this system c-myc activation appears to be a common mechanism in T-cell leukemogenesis.

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