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PMID: 8065359 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Differential transformation of mammary epithelial cells by Wnt genes.

Molecular and cellular biology ·Vol. 14 ·No. 9 ·1994-09-00 ·Pages 6278-86

Wong GT, Gavin BJ, McMahon AP

Abstract

The mouse Wnt family includes at least 10 genes that encode structurally related secreted glycoproteins. Wnt-1 and Wnt-3 were originally identified as oncogenes activated by the insertion of mouse mammary tumor virus in virus-induced mammary adenocarcinomas, although they are not expressed in the normal mammary gland. However, five other Wnt genes are differentially expressed during development of adult mammary tissue, suggesting that they may play distinct roles in various phases of mammary gland growth and development. Induction of transformation by Wnt-1 and Wnt-3 may be due to interference with these normal regulatory events; however, there is no direct evidence for this hypothesis. We have tested Wnt family members for the ability to induce transformation of cultured mammary cells. The results demonstrate that the Wnt gene family can be divided into three groups depending on their ability to induce morphological transformation and altered growth characteristics of the C57MG mammary epithelial cell line. Wnt-1, Wnt-3A, and Wnt-7A were highly transforming and induced colonies which formed and shed balls of cells. Wnt-2, Wnt-5B, and Wnt-7B also induced transformation but with a lower frequency and an apparent decrease in saturation density. In contrast, Wnt-6 and two other family members which are normally expressed in C57MG cells, Wnt-4 and Wnt-5A, failed to induce transformation. These data demonstrate that the Wnt genes have distinct effects on cell growth and should not be regarded as functionally equivalent.

MeSH Terms
Animals Cell Cycle Cell Line Cell Transformation, Neoplastic/genetics Culture Media Epithelial Cells Gene Expression Glycoproteins/physiology In Vitro Techniques Mammary Glands, Animal/cytology Mice Proto-Oncogene Proteins/genetics Proto-Oncogenes RNA, Messenger/genetics Transfection
Chemicals
Culture Media Glycoproteins Proto-Oncogene Proteins RNA, Messenger
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Wong G T
Roche Institute of Molecular Biology, Nutley, New Jersey 07110.
Gavin B J
McMahon A P
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Article Info
Journal
Molecular and cellular biology
Abbr.
Mol Cell Biol
ISSN
0270-7306
Published
1994-09-00
Pages
6278-86
Language
English
Region
United States
NLM ID
8109087
PMCID
PMC359154
Subset
IM
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