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microRNA-7 inhibits the epidermal growth factor receptor and the Akt pathway and is down-regulated in glioblastoma.

by: Benjamin Kefas, Jakub Godlewski, Laurey Comeau, Yunqing Li, Roger Abounader, Michael Hawkinson, Jeongwu Lee, Howard Fine, E. Antonio Chiocca, Sean Lawler, Benjamin Purow
Cancer research, Vol. 68, No. 10. (15 May 2008), pp. 3566-3572, doi:10.1158/0008-5472.can-07-6639  Key: citeulike:3859532

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Abstract

microRNAs are noncoding RNAs inhibiting expression of numerous target genes, and a few have been shown to act as oncogenes or tumor suppressors. We show that microRNA-7 (miR-7) is a potential tumor suppressor in glioblastoma targeting critical cancer pathways. miR-7 potently suppressed epidermal growth factor receptor expression, and furthermore it independently inhibited the Akt pathway via targeting upstream regulators. miR-7 expression was down-regulated in glioblastoma versus surrounding brain, with a mechanism involving impaired processing. Importantly, transfection with miR-7 decreased viability and invasiveness of primary glioblastoma lines. This study establishes miR-7 as a regulator of major cancer pathways and suggests that it has therapeutic potential for glioblastoma.


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