MicroRNAs are short ribonucleotides that bind to messenger RNA to modify protein translation or promote RNA degradation. Knowledge of the function and regulation of miRNA is rapidly expanding. They appear to be sensitive to the extracellular environment and could be important regulators of a cell’s response to diabetes. Can miRNA signatures detect early signs of DN? Can knowledge of miRNA signatures be translated to therapies based on novel antagomirs, synthetic analogues of miRNA, to interfere with their involvement in DN?