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DNA Microarrays

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...

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Updated: May 27, 2026

Performing Custom MicroRNA Microarray Experiments

Performing Custom MicroRNA Microarray Experiments

Published on: October 28, 2011

Performing custom microRNA microarray experiments.

Xiaoxiao Zhang¹, Yan Zeng

¹Department of Pharmacology, University of Minnesota, USA.

Journal of Visualized Experiments : Jove

|November 9, 2011

Summary

This summary is machine-generated.

MicroRNAs (miRNAs) regulate gene expression and are linked to diseases. This study details a custom miRNA microarray method for profiling miRNA expression, offering a cost-effective and accessible approach for research.

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Area of Science:

Molecular Biology
Genetics
Biochemistry

Background:

MicroRNAs (miRNAs) are small RNA molecules regulating gene expression post-transcriptionally.
Altered miRNA expression is implicated in human diseases, including cancers, highlighting their role as potential biomarkers.
Understanding miRNA expression is crucial for biological research and disease diagnostics.

Purpose of the Study:

To describe a method for performing custom microRNA microarray experiments.
To provide a detailed protocol for profiling microRNA expression using microarray technology.
To highlight the advantages of miRNA microarrays for research applications.

Main Methods:

Custom miRNA probe sets are printed on glass slides to create miRNA microarrays.
RNA is isolated, labeled with fluorescent dye, and hybridized to the microarray.
Reference DNA oligonucleotides are used for quality control and data normalization.

Main Results:

The described method allows for high-throughput profiling of miRNA expression.
Microarray slides can be stripped and regenerated, reducing costs and enhancing consistency.
The protocol is adaptable for various custom microarray experiments.

Conclusions:

Custom miRNA microarrays offer a cost-effective and accessible method for miRNA expression profiling.
This technique supports research into miRNA functions and their roles in disease.
The described methodology can be applied broadly in molecular biology laboratories.