MYO7A and sensorineural hearing loss disorder: Myosin VIIa (MYO7A), a cochlear hair-cell-specific marker, was used to stain the whole-mount cochleae of the three SNHL models (Figures 1C–F), indicating that the numbers of MYO7A-positive out hair cells (OHCs) significantly decreased in 8Mon, 1HPN, and 1DPC mice, and further in 12Mon, 24HPN, and 3DPC mice when compared with the controls (P < 0.05, two-tailed Student’ t tests; Figures 1G–I).