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Title 

Overexpression of membrane-type matrix metalloproteinase-1 gene induces mammary gland abnormalities and adenocarcinoma in transgenic mice

Authors 

Hye Yeong HaHyung Bae MoonMyoung Soo NamJeong Woong LeeZae Yoong RyooTae Hoon LeeKyung Kwang LeeByung Jan SoHiroshi SatoMotoharu SeikiDae Yeul Yu

Publisher 

American Association for Cancer Research

Issue Date 

2001

Citation 

Cancer Research, vol. 61, no. 3, pp. 984-990

Keywords 

breast carcinogenesisgene overexpressionmouseadenocarcinomagene expressionmammary glands, animalmammary neoplasms, experimentalmatrix metalloproteinase 14matrix metalloproteinases, membrane-associatedmice

Abstract 

To investigate the role of membrane-type matrix metalloproteinase-1 (MT1-MMP) in mammary gland development and tumorigenesis, transgenic mice overexpressing MT1-MMP in mammary gland under the control of the mouse mammary tumor virus long terminal repeat-promoter were generated. The mouse mammary tumor virus/MT1-MMP transgenic mice displayed abnormalities in 82% of female mammary glands. The abnormalities were verified as lymphocytic infiltration, fibrosis, hyperplasia, alveolar structure disruption, dysplasia, and adenocarcinoma. Northern and reverse transcription-PCR analyses demonstrated that MT1-MMP mRNA was overexpressed in mammary glands exhibiting abnormalities. Western blot analysis and immunohistochemical studies have revealed that the protein expression level was also increased in these glands. In addition, the β-casein gene as a functional epithelial cell marker was poorly expressed in the mammary glands of transgenic mice exhibiting abnormalities. Gelatin zymography showed significantly increased MMP-2 activation in these mammary glands. These results showed that overexpression of MT1-MMP induced remodeling of the extracellular matrix and tumor formation in the mammary glands of transgenic mice. Therefore, we suggest that overexpression of MT1-MMP may play a key role in development and tumorigenesis in mammary glands.

ISSN 

0008-5472

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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