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J Virol. 1986 October; 60(1): 230-241

Tumor progression in murine leukemia virus-induced T-cell lymphomas: monitoring clonal selections with viral and cellular probes.

ABSTRACT

Clonal selections occurring during the progression of Moloney murine leukemia virus (MuLV)-induced T-cell lymphomas in mice were examined in primary and transplanted tumors by monitoring various molecular markers: proviral integration patterns, MuLV insertions near c-myc and pim-1, and rearrangements of the immunoglobulin heavy chain and beta-chain T-cell receptor genes. The results were as follows. Moloney MuLV frequently induced oligoclonal tumors with proviral insertions near c-myc or pim-1 in the independent clones. Moloney MuLV acted as a highly efficient insertional mutagen, able to activate different (putative) oncogenes in one cell lineage. Clonal selections during tumor progression were frequently marked by the acquisition of new proviral integrations. Independent tumor cell clones exhibited a homing preference upon transplantation in syngeneic hosts and were differently affected by the route of transplantation.

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