Related Experiment Video
Updated: Jun 23, 2026
05:48
Micromanipulation of Gene Expression in the Adult Zebrafish Brain Using Cerebroventricular Microinjection of Morpholino Oligonucleotides
Published on: May 23, 2013
Parallel DNA pyrosequencing unveils new zebrafish microRNAs
Ana R Soares1, Patrícia M Pereira, Bruno Santos
1RNA Biology Laboratory, Department of Biology & CESAM, University of Aveiro, Aveiro 3810-193, Portugal. arsoares@cnc.cj.uc.pt
BMC Genomics
|April 29, 2009
Summary
Next-generation sequencing rapidly identifies microRNAs (miRNAs) in zebrafish. This study expands the known zebrafish miRNA repertoire and reveals their expression patterns during development and in organs.
Area of Science:
- Molecular Biology
- Genomics
- Developmental Biology
Background:
- MicroRNAs (miRNAs) are small regulatory RNAs controlling gene expression.
- They are crucial for diverse biological processes, including development and immunity.
- Efficient identification of miRNAs is vital for understanding eukaryotic biology.
Purpose of the Study:
- To discover microRNAs (miRNAs) in zebrafish (Danio rerio) using 454 DNA pyrosequencing.
- To identify novel miRNAs, miRNA star sequences, and potential miRNA targets.
- To establish a miRNA expression profile during zebrafish development and in adult organs.
Main Methods:
- Isolation of miRNAs from various embryonic stages and adult zebrafish organs.
- Preparation and tagging of cDNA libraries.
- Sequencing using Roche FLX genome sequencer (454 DNA pyrosequencing).
Main Results:
- Pyrosequencing identified 90% of previously known zebrafish miRNAs.
- Discovery of 25 novel miRNAs, 107 miRNA star sequences, and 41 candidate targets.
- Generated a miRNA expression profile, highlighting developmental and tissue-specific expression patterns.
Conclusions:
- 454 DNA pyrosequencing is an effective method for comprehensive miRNA identification in zebrafish.
- The study increased the known zebrafish miRNA count to 217.
- Abundant miRNA star sequences suggest potential regulatory functions in this vertebrate model.
