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Influence of tumor-associated E-cadherin mutations on tumorgenicity and metastasis.
Carcinogenesis 24, 1879-1886 (2003)
In this study, we investigated whether tumor-associated E-cadherin mutations impair the tumor-suppressive function of the cell adhesion molecule and influence metastasis formation in a severe combined immunodeficiency mouse model. The investigated E-cadherin mutations were in frame deletions of exons 8 (del 8) or 9 (del 9) and a point mutation in exon 8 (p8). Transfected human MDA-MB-435S carcinoma cells stably expressing wild-type (wt) or mutant E-cadherin were injected into the mouse mammary fat pad. Mice transplanted with wt E-cadherin transfectants developed significantly smaller tumors than animals transplanted with the E-cadherin-negative parental cell line. Animals transplanted with del 9 or p8 E-cadherin transfectants produced medium size tumors, indicating that these mutations impair the tumor-suppressive function of E-cadherin. In contrast, mice transplanted with del 8 E-cadherin transfectants developed tumors of approximately the same sizes as animals transplanted with wt E-cadherin expressing cells. Lung metastases were induced by all cell lines without significant differences. Immunohistochemical analysis of E-cadherin expression in the tumors revealed a heterogeneous staining pattern, indicating loss or down-regulation of E-cadherin in some tumor cells. Metastases were completely negative for E-cadherin. Our data suggest that the type of mutation determines whether the tumor-suppressive function of E-cadherin is impaired.
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Publication type
Article: Journal article
Document type
Scientific Article
Language
english
Publication Year
2003
HGF-reported in Year
0
ISSN (print) / ISBN
0143-3334
e-ISSN
1460-2180
Journal
Carcinogenesis
Quellenangaben
Volume: 24,
Issue: 12,
Pages: 1879-1886
Publisher
Oxford University Press
Reviewing status
Peer reviewed
Institute(s)
Institute of Pathology (PATH)
POF-Topic(s)
30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
Research field(s)
Enabling and Novel Technologies
PSP Element(s)
G-500300-001
Erfassungsdatum
2003-12-12