Fig. 8.

The relative expression levels of four let-7 miRNA family members (a, b, c and d) [(shown in (A), (B), (C) and (D) respectively] were detected by RT-qPCR in mouse lungs at different phases of injury following irradiation. The expression levels of the let-7 miRNA family members were normalized to that of U6 and calculated using the 2-ΔΔCt method. The data presented were obtained from three independent experiments per sample and are shown as the mean ± SD. Statistical analyses between groups were performed using Student’s t-test. ^*P < 0.05, ^**P < 0.01, ^***P < 0.001. h, hour, w, week, m, month.