Abstract
MicroRNAs (miRNAs) are endogenously expressed RNAs consisting of 20–24 nucleotides. These molecules are thought to repress protein translation by binding to target mRNAs. However, biological functions have not been assigned to most of the 175 porcine miRNAs registered in miRBase (release 15.0). In an effort to uncover miR-103 important in pigs, we examined the integrative tissue expression profile and gene ontology (GO) term enrichment of predicted target genes to determine the global biological functions of miR-103. Our results demonstrated that miR-103 is involved in various biological processes including brain development, lipid metabolism, adipocyte differentiation, hematopoiesis, and immunity. Moreover, we also experimentally verified effects of miR-103 in porcine preadipocytes. miR-103 levels increased in differentiating adipocytes, and inhibition of miR-103 effectively inhibited preadipocyte differentiation. In addition, mRNA levels of the putative miR-103 target RAI14 were higher in miR-103 inhibitor-treated adipocytes. These results demonstrate that miR-103 is involved in porcine preadipocyte differentiation and may act through the putative target gene RAI14. In a word, our data provide new insights into the global biological role of miR-103.
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Acknowledgments
We are grateful to members of our laboratories for critical reading of the manuscript and helpful discussion. This work was supported by National Natural Science Foundation of China (NO.31072014) and the National High Technology Research and Development Program of China (863 Program) (No. 2006AA10Z138).
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Li, G., Wu, Z., Li, X. et al. Biological role of MicroRNA-103 based on expression profile and target genes analysis in pigs. Mol Biol Rep 38, 4777–4786 (2011). https://doi.org/10.1007/s11033-010-0615-z
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DOI: https://doi.org/10.1007/s11033-010-0615-z