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A hammerhead ribozyme suppresses expression of hepatocyte growth factor/scatter factor receptor c-MET and reduces migration and invasiveness of breast cancer cells

Jiang, Wen Guo, Grimshaw, Alfred David, Lane, Jane, Martin, Tracey Amanda, Abounader, R., Laterra, J. and Mansel, Robert Edward 2001. A hammerhead ribozyme suppresses expression of hepatocyte growth factor/scatter factor receptor c-MET and reduces migration and invasiveness of breast cancer cells. Clinical Cancer Research 7 , pp. 2555-2562.

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Abstract

PURPOSE: Hepatocyte growth factor/scatter factor (HGF/SF), via its receptor c-MET, has been implicated to play a pivotal role in breast cancer development and progression. This study examined a transgene-consisting of a combination of U1snRNA, hammerhead ribozyme, and antisense, designed to inhibit c-met expression-and its impact on the migration and in vitro invasion of breast cancer cells. EXPERIMENTAL DESIGN: A hammerhead ribozyme targeting human c-MET was cloned into a modified pZeoU1EcoSpe vector and transfected into breast cancer cells MDA MB 231 and MCF-7 by electroporation. Expression of MET mRNA and protein was determined. Migration and in vitro invasiveness of transfected cells were also analyzed. RESULTS: Breast cancer cells were transfected with the ribozyme-containing plasmids. Stable transfectants manifested an almost complete loss of MET mRNA and protein, as shown by reverse transcription-PCR, Northern blotting, and Western blotting, respectively, whereas the wild-type plasmid had no effects. Met-ribozyme transfected cells exhibited reduced migration and in vitro invasiveness through extracellular matrix (Matrigel), compared with the wild-type cells and cells transfected with empty plasmid. CONCLUSIONS: These data show that targeting c-MET by way of a hammerhead ribozyme encoding antisense to c-MET is an effective approach in reducing the invasiveness of breast cancer cells.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Subjects: R Medicine > R Medicine (General)
ISSN: 1078-0432
Last Modified: 18 Oct 2017 08:12
URI: http://orca-mwe.cf.ac.uk/id/eprint/105

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