Abstract
The discovery that the human genome codes for thousands (if not millions) of previously unrecognized non-protein coding RNAs with regulatory functions has changed our understanding of many physiological and pathological processes. A prominent class of non-coding RNAs with important functions in cancer initiation and progression comprised by very short single-stranded, mRNA translation modulating RNAs, termed microRNAs. The determination of microRNA expression profiles is now widely used in biology and pathology, employing a range of methodologies. A steadily growing number of studies describe the analysis of formalin-fixed paraffin-embedded, so-called “archival” specimens. However, procedures for data processing and calculations are far from standardized and differ considerably between published studies, making comparisons and meta-analyses still quite difficult. In this review, we provide a short overview of profiling methods used for archival samples and describe in detail a modified method for normalization and processing of raw data obtained by fluorescence-labeled bead technology from Luminex.Inc.
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Acknowledgments
The authors would like to thank Britta Hasemeier for indispensable help in preparing the figures.
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Streichert, T., Otto, B. & Lehmann, U. microRNA Expression Profiling in Archival Tissue Specimens: Methods and Data Processing. Mol Biotechnol 50, 159–169 (2012). https://doi.org/10.1007/s12033-011-9427-1
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DOI: https://doi.org/10.1007/s12033-011-9427-1