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MicroRNAs--regulators of signaling networks in dilated cardiomyopathy Naga Prasad SV; Karnik SSJ Cardiovasc Transl Res 2010[Jun]; 3 (3): 225-34MicroRNAs (miRNAs) are endogenous small non-coding ribonucleotides that regulate expression of target genes governing diverse biological functions. Mechanistically, miRNA binding to the target complimentary sequences on the mRNA results in degradation or inhibition of protein translation. The short guiding and binding sequence of miRNA allows them to target a large repertoire of transcripts altering expression of many proteins. These miRNA targets are not restricted to specific signaling pathways but to a diverse group of transcripts, which harbor the target complimentary sequence. miRNA targeting of these diverse transcripts result in regulation of multiple signaling pathways establishing miRNAs as regulators of systems biomolecular networks. Accumulating evidence shows that miRNAs play an important role in cardiac development, hypertrophy, and failure, thereby are integral to regulating adaptive and maladaptive remodeling. Since cardiac remodeling and failure is a complex phenotype, it is apparent that global biomolecular networks and miRNAs profiles would be altered. Indeed, the miRNA profiles are varied with different etiologies of heart failure indicating that miRNAs could be the global regulators. Although the idea of miRNA being global regulators is not new, we believe that the time is ripe to discuss the role of miRNAs in regulating biomolecular networks. We discuss in the review, the use of Ingenuity Pathways Analysis algorithms with predicted targets of altered miRNA in dilated cardiomyopathy to computationally determine the alterations in canonical functional pathways and to generate biomolecular networks.|Algorithms[MESH]|Animals[MESH]|Cardiomyopathy, Dilated/*genetics/metabolism/physiopathology[MESH]|Data Mining[MESH]|Databases, Genetic[MESH]|Gene Expression Regulation[MESH]|Gene Regulatory Networks[MESH]|Genotype[MESH]|Humans[MESH]|MicroRNAs/*metabolism[MESH]|Myocardium/*metabolism[MESH]|Phenotype[MESH]|Signal Transduction/*genetics[MESH] |
