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. 1985 Jan;82(2):426–430. doi: 10.1073/pnas.82.2.426

Distinctive effects of the viral oncogenes myc, erb, fps, and src on the differentiation program of quail myogenic cells.

G Falcone, F Tatò, S Alemà
PMCID: PMC397051  PMID: 2982156

Abstract

The relationship between susceptibility to transformation in vitro by different oncogenes and terminal differentiation was analyzed in embryonic quail myogenic cells. Infection with Rous sarcoma virus (RSV), Fujinami sarcoma virus (FSV), avian erythroblastosis virus (AEV), and the avian myelocytomatosis virus MC29 led to rapid and massive transformation. Transformed cells had distinctive morphological alterations, increased proliferation rates, and the ability to grow in agar suspension. Furthermore, homogeneously transformed cultures failed to fuse into multinucleated myotubes and to express muscle-specific genes. However, cloned populations of RSV-, FSV-, and AEV-transformed myogenic cells could, under appropriate culture conditions, partially differentiate into atypical "revertant" myotubes. In contrast, competence for terminal differentiation was completely and irreversibly suppressed on transformation by MC29. The specificity of action of a given oncogenic sequence on the inhibition of differentiation was further studied by using conditional and nonconditional transformation mutants. Myogenic cells infected with temperature-sensitive (ts) mutants of RSV and FSV exhibited a fully reversible block of differentiation after shift to restrictive temperature, while cells infected with ts34 AEV were not temperature sensitive for differentiation. Cultures infected with the partially transformation-defective mutant of MC29 td10H were morphologically transformed and acquired anchorage independence for proliferation but maintained a residual competence for terminal differentiation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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