Effect of hibernation on the expression of selected microRNAs in skeletal muscle of M. lucifugus A. Representative RT-PCR data were shown for expression of indicated miRNAs under control and hibernation conditions. B. Relative expression of miRNA-21, miR-1a-1, miR-29b, miR-107, miR-23a, miR-181b, miR-15a, miR-20a, miR-128 and miR-206. Expression of the indicated miRNAs was normalized to that of 5S rRNA from the same pectoral muscle RNA samples and shown in histogram. Data are presented as means ± S.E.M of independent samples from separate animals (n = 3–4). ∗indicated that expression of the indicated miRNA in hibernated bats was significantly different from controls (P < 0.05).