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Research Article

Properties of a murine retroviral recombinant of avian acute leukemia virus E26: a murine fibroblast assay for v-ets function.

C C Yuan, N Kan, K J Dunn, T S Papas, D G Blair
C C Yuan
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N Kan
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K J Dunn
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T S Papas
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D G Blair
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ABSTRACT

A replication-defective murine retroviral construct, termed pME26, was generated by inserting avian gag-myb-ets sequences derived from the cloned avian acute leukemia virus E26 into an Abelson murine leukemia virus-derived retroviral vector. ME26 virus can be rescued efficiently from transfected NIH 3T3 cells by replicating murine leukemia viruses. Either pME26-transfected nonproducers or ME26 virus-infected NIH 3T3 cells expressed a 135-kilodalton fusion protein (p135) which was detectable by immunoprecipitation with antiserum directed against avian leukemia virus p27gag, myb or ets oncogene protein, or murine leukemia virus p15gag and was principally localized in the nucleus. NIH 3T3 cells infected with ME26 exhibited morphological alterations and increased proliferation in reduced serum and formed small colonies in agar suspension. Discrete foci could be readily recognized in cells maintained in a defined medium containing 0.03 to 0.1% calf serum. In newborn NFS/N mice, ME26 induced a significantly higher mortality and incidence of erythroid and myeloid leukemias. Analysis of a series of mutants affecting the expression of various portions of p135 indicated that the v-ets gene acts to mitogenically stimulate the proliferation of NIH 3T3 fibroblasts and reduces or abolishes their serum dependence. These properties provide an assay system to study functions of the ets gene family.

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Properties of a murine retroviral recombinant of avian acute leukemia virus E26: a murine fibroblast assay for v-ets function.
C C Yuan, N Kan, K J Dunn, T S Papas, D G Blair
Journal of Virology Jan 1989, 63 (1) 205-215; DOI:

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Properties of a murine retroviral recombinant of avian acute leukemia virus E26: a murine fibroblast assay for v-ets function.
C C Yuan, N Kan, K J Dunn, T S Papas, D G Blair
Journal of Virology Jan 1989, 63 (1) 205-215; DOI:
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