MicroRNAs (miRNAs), endogenous noncoding regulatory mRNAs of - nucleotides, have rapidly emerged as the central players in gene expression regulation. Owing to their ever-increasing implications in the control of various biological and pathological processes, miRNAs have now been considered novel biomarkers of various human diseases including, cancer, viral disease, cardiov- cular disorders, metabolic disturbances, etc. Particular expression pro?les have been associated with particular pathological states. Expression pro?ling of miR- NAs have therefore become extremely important not only for fundamentalists but also for clinicians. However, the methodologies used for detecting protein-coding mRNAs cannot be directly applied to miRNAs because of their small size. Over the past years, researchers have made great efforts to developing techniques suitable for miRNA detection and quanti?cation; a wide spectrum of creative and inno- tive techniques (more than 30 different methods) have been invented and validated. It has come to the time now to summarize these methods and present them in an orderly manner for better understanding and utilization of these methods to miRNA research and applications. In particular, the development of methods for quantifying circulating miRNAs opens up a fascinating opportunity for realizing miRNA as diagnostic and prognostic biomarkers of human disease. A book on this subject may help boosting up the passion of researchers to further improve the existing techniques and develop more new methods to ?t to new application needs. These considerations prompted us and urged us to undertake the work: writing a book focusing on miRNA expression detection methods.

Table of Contents:
General Remarks.- Detection, Profiling, and Quantification of miRNA Expression.- miRNA Microarray Methods.- Microarray and Its Variants for miRNA Profiling.- Northern Blotting Methods.- Northern Blotting and Its Variants for Detecting Expression and Analyzing Tissue Distribution of miRNAs.- In Situ Hybridization Methods.- In Situ Hybridization and Its Variants for Detecting Expression and Analyzing Cellular Distribution of miRNAs.- Real-Time RT-PCR Methods.- End-Point Stem-Loop Real-Time RT-PCR for miRNA Quantification.- miR-Q RT-PCR for miRNA Quantification.- Poly(A)-Tailed Universal Reverse Transcription.- Multiplexing RT-PCR for High-Throughput miRNA Profiling.- miRNA Amplification Profiling (mRAP).- Cloning Methods.- miRNA Serial Analysis of Gene Expression (miRAGE or SAGE).- Nanoparticle Methods.- Electrocatalytic Nanoparticle Tags Technique for High-Sensitivity miRNA Expression Analysis.- Nanoparticle-Amplified SPR Imaging for High-Sensitivity miRNA Profiling.- Conducting Polymer Nanowires Technique for High-Sensitivity miRNA Expression Analysis.- Gold Nanoparticle Probe Method for miRNA Quantification.- Other Methods.- Splinted Ligation Method.- Padlock-Probes and Rolling-Circle Amplification.- Invader Assay.- Single Molecule Method.- Enzymatic Method.- Surface-Enhanced Raman Spectroscopy Method.- RAKE Assay.- Bead-Based Flow Cytometric miRNA Expression Profiling.- Bioluminescence miRNA Detection Method.- Molecular Beacon Method.- Ribozyme Method.- Electrocatalytic Moiety Labeling Technique for High-Sensitivity miRNA Expression Analysis.- Circulating miRNA Detection Methods.- Serum and Plasma miRNA Detection.- miRNA Detection from Peripheral Blood Microvesicles.- Detection of Placental miRNAs in Maternal Plasma.- Single-cell miRNA Detection Methods.- QuantitativeLNA-ELF-FISH Method for miRNA Detection in Single Mammalian Cell.- Single Cell Stem-Looped Real-Time PCR.- miRNA Function-Reporter Expression Assay.- Whole Mount In Situ Analysis.- Whole Mount In Situ Hybridization (WM-ISH) for miRNA Expression Profiling During Vertebrate Development.