TITLE

High miR-196a levels promote the oncogenic phenotype of colorectal cancer cells

AUTHOR(S)
Schimanski, Carl Christoph; Frerichs, Kirsten; Rahman, Fareed; Berger, Martin; Lang, Hauke; Galle, Peter R.; Moehler, Markus; Gockel, Ines; Veysey, Martin J.
PUB. DATE
May 2009
SOURCE
World Journal of Gastroenterology;5/7/2009, Vol. 15 Issue 17, p2089
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
AIM: To analyze the relevance of the microRNA miR-196a for colorectal oncogenesis. METHODS: The impact of miR-196a on the restriction targets HoxA7, HoxB8, HoxC8 and HoxD8 was analyzed by reverse transcription polymerase chain reaction (RT-PCR) after transient transfection of SW480 cancer cells. The miR-196a transcription profile in colorectal cancer samples, mucosa samples and diverse cancer cell lines was quantified by RT-PCR. Transiently miR-196a-transfected colorectal cancer cells were used for diverse functional assays in vitro and for a xenograft lung metastasis model in vivo. RESULTS: HoxA7, HoxB8, HoxC8 and HoxD8 were restricted by miR-196a in a dose-dependent and gene-specific manner. High levels of miR-196a activated the AKT signaling pathway as indicated by increased phosphorylation of AKT. In addition, high levels of miR-196a promoted cancer cell detachment, migration, invasion and chemosensitivity towards platin derivatives but did not impact on proliferation or apoptosis. Furthermore, miR-196a increased the development of lung metastases in mice after tail vein injection. CONCLUSION: miR-196a exerts a pro-oncogenic influence in colorectal cancer.
ACCESSION #
42834331

 

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