Deciphering the porcine intestinal microRNA transcriptome

BMC Genomics

Research Article

Lena Hoeke¹  Soroush Sharbati¹  Ralf Einspanier¹  Jutta Sharbati¹  Marc R Friedländer²  Nikolaus Rajewsky²  Wei Chen³  Peer F Stähler⁴  Andreas Keller⁴ 

[1] Freie Universität Berlin, Institute of Veterinary Biochemistry, Oertzenweg 19b, 14163, Berlin, Germany;Max Delbrück Centrum für Molekulare Medizin, Robert-Rössle-Strasse 10, 13125, Berlin, Germany;Max Delbrück Centrum für Molekulare Medizin, Robert-Rössle-Strasse 10, 13125, Berlin, Germany;Max Planck Institute for Molecular Genetics, Department of Human Molecular Genetics, Ihnestrasse 73, 14195, Berlin, Germany;febit biomed gmbh, Im Neuenheimer Feld 519, 69120, Heidelberg, Germany;

关键词: Deep Sequencing;    Mature miRNAs;    Proximal Jejunum;    Viral miRNAs;    Distal Jejunum;   

DOI  :  10.1186/1471-2164-11-275

 received in 2010-02-09, accepted in 2010-04-30,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundWhile more than 700 microRNAs (miRNAs) are known in human, a comparably low number has been identified in swine. Because of the close phylogenetic distance to humans, pigs serve as a suitable model for studying e.g. intestinal development or disease. Recent studies indicate that miRNAs are key regulators of intestinal development and their aberrant expression leads to intestinal malignancy.ResultsHere, we present the identification of hundreds of apparently novel miRNAs in the porcine intestine. MiRNAs were first identified by means of deep sequencing followed by miRNA precursor prediction using the miRDeep algorithm as well as searching for conserved miRNAs. Second, the porcine miRNAome along the entire intestine (duodenum, proximal and distal jejunum, ileum, ascending and transverse colon) was unraveled using customized miRNA microarrays based on the identified sequences as well as known porcine and human ones. In total, the expression of 332 intestinal miRNAs was discovered, of which 201 represented assumed novel porcine miRNAs. The identified hairpin forming precursors were in part organized in genomic clusters, and most of the precursors were located on chromosomes 3 and 1, respectively. Hierarchical clustering of the expression data revealed subsets of miRNAs that are specific to distinct parts of the intestine pointing to their impact on cellular signaling networks.ConclusionsIn this study, we have applied a straight forward approach to decipher the porcine intestinal miRNAome for the first time in mammals using a piglet model. The high number of identified novel miRNAs in the porcine intestine points out their crucial role in intestinal function as shown by pathway analysis. On the other hand, the reported miRNAs may share orthologs in other mammals such as human still to be discovered.

【 授权许可】

CC BY   
© Sharbati et al; licensee BioMed Central Ltd. 2010