Although microRNAs are known to have roles in regulating immune responses, our understanding of the exact functions of individual microRNAs in the immune system is still in its infancy. Two papers, ...

MicroRNAs (miRNAs) are ∼22-nucleotide, evolutionarily conserved, small RNAs that can control gene expression by targeting mRNA for degradation or translational repression. Now, Xiao et al. show that ...