Abstract：
:v-erb-B is the principal transforming gene of avian erythroblastosis virus, a replication defective retrovirus that transforms erythroid and fibroblast cells in vitro and causes erythroleukemia and fibrosarcoma in vivo. We have used a recombinant murine retrovirus, based on the truncated genome of Moloney murine leukemia virus and containing a chimeric gag-v-erb-B gene, to determine the murine hematopoietic cells transformed by v-erb-B. Infection of day 16.5 murine embryonal cells in liquid culture with this virus resulted in the outgrowth of foci of loosely to non-adherent hematopoietic cells which grew in close association with an adherent monolayer. After several weeks in culture a clonal population of transformed pre-B-lymphocytes emerged from this transformation initiated, though still growth factor dependent, population. These transformed cells were growth factor independent, and were tumorigenic in syngeneic mice. The results indicate that although v-erb-B can initiate transformation of murine hematopoietic cells, additional events are required for establishment of the fully transformed growth factor independent, tumorigenic phenotype. This v-erb-B induced progression from growth factor dependence to independence provides an in vitro model system for analysing events involved in the initiation and maintenance of leukemia.
journal_name
Leukemiajournal_title
Leukemiaauthors
Miller M,Kennewell A,Symonds Gsubject
Has Abstractpub_date
1992-01-01 00:00:00pages
18-28issue
1eissn
0887-6924issn
1476-5551journal_volume
6pub_type
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