<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "RNA degradation compromises the reliability of microRNA expression profiling"^^ . "Background: MicroRNAs are small non-coding RNAs that post-transcriptionally regulate gene expression and their expression is frequently altered in human diseases, including cancer. To correlate clinically relevant parameters with microRNA expression, total RNA is frequently prepared from samples that were archived for various time periods in frozen tissue banks but, unfortunately, RNA integrity is not always preserved in these frozen tissues. Here, we investigate whether experimentally induced RNA degradation affects microRNA expression profiles. Results: Tissue samples were maintained on ice for defined time periods prior to total RNA extraction, which resulted in different degrees of RNA degradation. MicroRNA expression was then analyzed by microarray analysis (miCHIP) or microRNA-specific real-time quantitative PCR (miQPCR). Our results demonstrate that the loss of RNA integrity leads to in unpredictability of microRNA expression profiles for both, array-based and miQPCR assays. Conclusion: MicroRNA expression cannot be reliably profiled in degraded total RNA. For the profiling of microRNAs we recommend use of RNA samples with a RNA integrity number equal to or above seven."^^ . "2009" . . "9" . "102" . . "BioMed Central"^^ . . . "BMC Biotechnology"^^ . . . "14726750" . . . . . . . . . . . . . . "David"^^ . "Ibberson"^^ . "David Ibberson"^^ . . "Mirco"^^ . "Castoldi"^^ . "Mirco Castoldi"^^ . . "Martina U."^^ . "Muckenthaler"^^ . "Martina U. Muckenthaler"^^ . . "Vladimir"^^ . "Benes"^^ . "Vladimir Benes"^^ . . . . . . "RNA degradation compromises the reliability of microRNA expression profiling (Other)"^^ . . . . . . "preview.jpg"^^ . . . "RNA degradation compromises the reliability of microRNA expression profiling (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "RNA degradation compromises the reliability of microRNA expression profiling (Other)"^^ . . . . . . "medium.jpg"^^ . . . "RNA degradation compromises the reliability of microRNA expression profiling (PDF)"^^ . . . "12896_2009_Article_468.pdf"^^ . . . "RNA degradation compromises the reliability of microRNA expression profiling (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "RNA degradation compromises the reliability of microRNA expression profiling (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #19930 \n\nRNA degradation compromises the reliability of microRNA expression profiling\n\n" . "text/html" . . . "570 Biowissenschaften, Biologie"@de . "570 Life sciences"@en . .