alexa MiRNA expression patterns predict survival in glioblastoma.
Biomedical Sciences

Biomedical Sciences

Biology and Medicine

Author(s): Niyazi M, Zehentmayr F, Niemller OM, Eigenbrod S, Kretzschmar H,

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Abstract BACKGROUND: In order to define new prognostic subgroups in patients with glioblastoma a miRNA screen (> 1000 miRNAs) from paraffin tissues followed by a bio-mathematical analysis was performed. METHODS: 35 glioblastoma patients treated between 7/2005 - 8/2008 at a single institution with surgery and postoperative radio(chemo)therapy were included in this retrospective analysis. For microarray analysis the febit biochip "Geniom® Biochip MPEA homo-sapiens" was used. Total RNA was isolated from FFPE tissue sections and 1100 different miRNAs were analyzed. RESULTS: It was possible to define a distinct miRNA expression pattern allowing for a separation of distinct prognostic subgroups. The defined miRNA pattern was significantly associated with early death versus long-term survival (split at 450 days) (p = 0.01). The pattern and the prognostic power were both independent of the MGMT status. CONCLUSIONS: At present, this is the first dataset defining a prognostic role of miRNA expression patterns in patients with glioblastoma. Having defined such a pattern, a prospective validation of this observation is required.
This article was published in Radiat Oncol and referenced in Biology and Medicine

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