  In the past decades microRNAs (miRNA) have much attracted the attention of
researchers at the interface between life and theoretical sciences for their
involvement in post-transcriptional regulation and related diseases. Thanks to
the always more sophisticated experimental techniques, the role of miRNAs as
"noise processing units" has been further elucidated and two main ways of miRNA
noise-control have emerged by combinations of theoretical and experimental
studies. While on one side miRNA were thought to buffer gene expression noise,
it has recently been suggested that miRNA could also increase the cell-to-cell
variability of their targets. In this Mini Review, we focus on the miRNA role
in noise processing and on the inference of the parameters defined by the
related theoretical modelling.
