microRNA Expression Profiling in Archival Tissue Specimens: Methods and Data Processing |
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Authors: | Thomas Streichert Benjamin Otto Ulrich Lehmann |
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Institution: | 1. Department of Clinical Chemistry/Central Laboratories, Universit?tsklinikum Hamburg-Eppendorf, 20246, Hamburg, Germany 2. Institute of Pathology, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
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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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