Abstract
MicroRNAs (miRNAs) are short, stable, noncoding RNAs involved in post-transcriptional gene silencing via hybridization to mRNA. Few have been thoroughly characterized in any species. Here, we describe a method to detect miRNAs using micro-arrays, in which the miRNAs are directly hybridized to the array. We used this method to analyze miRNA expression across 17 mouse organs and tissues. More than half of the 78 miRNAs detected were expressed in specific adult tissues, suggesting that miRNAs have widespread regulatory roles in adults. By comparing miRNA levels to mRNA levels determined in a parallel microarray analysis of the same tissues, we found that the expression of target mRNAs predicted on the basis of sequence complementarity is unrelated to the tissues in which the corresponding miRNA is expressed.
MeSH Terms
Animals
Female
Fluorescent Dyes
Gene Expression Profiling
Male
Mice/genetics
MicroRNAs/genetics,metabolism
Oligonucleotide Array Sequence Analysis
Organ Specificity
RNA Processing, Post-Transcriptional
RNA, Messenger/analysis
Sensitivity and Specificity
Sequence Analysis, DNA
Tissue Distribution
Chemicals
Fluorescent Dyes
MicroRNAs
RNA, Messenger
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Babak Tomas
Banting and Best Department of Medical Research, 112 College St., University of Toronto, Toronto, Ontario M5G 1L6, Canada.
Zhang Wen
Morris Quaid
Blencowe Benjamin J
Hughes Timothy R
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