RAKE and LNA-ISH Reveal MicroRNA Expression and Localization in Archival Human Brain

Overview

Journal RNA

Specialty Molecular Biology

Date 2005 Dec 24

PMID 16373485

Citations 143

Authors

Peter T Nelson

Don A Baldwin

Wigard P Kloosterman

Sakari Kauppinen

Ronald H A Plasterk

Zissimos Mourelatos

Affiliations

Soon will be listed here.

Abstract

microRNAs (miRNAs) are small (approximately 22 nucleotide) regulatory RNAs which play fundamental roles in many biological processes. Recent studies have shown that the expression of many miRNAs is altered in various human tumors and some miRNAs may function as oncogenes or tumor suppressor genes. However, with the exception of glioblastoma multiforme, the expression of miRNAs in brain tumors is unknown. Furthermore, methods to profile miRNAs from formalin-fixed, paraffin-embedded (FFPE) archival tissues or to study their cellular and subcellular localization in FFPE tissues have been lacking. Here we report the coordinated miRNA expression analysis from the tissue level to the subcellular level, using the RAKE (RNA-primed, array-based, Klenow Enzyme) miRNA microarray platform in conjunction with Locked Nucleic Acid (LNA)-based in situ hybridization (LNA-ISH) on archival FFPE human brains and oligodendroglial tumors. The ability to profile miRNAs from archival tissues at the tissue level, by RAKE microarrays, and at the cellular level by LNA-ISH, will accelerate studies of miRNAs in human diseases.

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