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. 1990 Oct;1(11):863–872. doi: 10.1091/mbc.1.11.863

Neoplastic transformation of mouse mammary epithelial cells by deregulated myc expression.

N T Telang 1, M P Osborne 1, L A Sweterlitsch 1, R Narayanan 1
PMCID: PMC362853  PMID: 2088530

Abstract

A spontaneously immortalized, nontumorigenic mouse mammary epithelial cell line (MMEC) was transfected with an activated myc construct by electroporation. Constitutive expression of myc in MMEC resulted in anchorage independence in soft agar and tumorigenicity in nude mice. The myc-expressing MMEC showed higher saturation density, faster growth rate, and partial abrogation of serum-derived growth factor(s) requirement compared with parent MMEC. Epidermal growth factor or transforming growth factor alpha stimulated the anchorage-independent growth, but not the anchorage-dependent growth, of MMEC-myc cells. Type 1 transforming growth factor beta, on the other hand, inhibited both the anchorage-independent and anchorage-dependent growth of MMEC-myc cells. These results demonstrate that deregulated expression of myc results in neoplastic transformation iin mammary epithelial cells. Accompanying the transformation is altered sensitivity to polypeptide growth factors.

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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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