Interplay between microRNAs and RNA-binding proteins determines developmental processes
- PMID: 18414021
- DOI: 10.4161/cc.7.7.5644
Interplay between microRNAs and RNA-binding proteins determines developmental processes
Abstract
MicroRNAs (miRNAs) are genes involved in normal development and cancer. They inhibit gene expression by associating with 3'-Untranslated regions (3'UTRs) of messenger RNAs (mRNAs), and are thought to regulate a large proportion of protein coding genes. However, it is becoming apparent that miRNA activity is not necessarily always determined by its expression in the cell. MiRNA activity can be affected by RNA-binding proteins (RBPs). For example, the RNA-binding protein HuR associates with the 3'UTR of the CAT1 mRNA after stress, counteracting the effect of miR-122. Second, we found that the expression of an RNA-binding protein called Dead end (Dnd1) prohibits the function of several miRNAs by blocking the accessibility of target mRNAs.(2) Dnd1 function is essential for proper development of primordial germ cells (PGCs) in zebrafish and mammals, indicating a crucial role for RBP/miRNA interplay on 3'UTRs of mRNAs in developmental decisions. In this perspective we discuss the interplay between RBPs and miRNAs in the context of germ cells and review current observations implicating RBPs in miRNA function.
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