Skip to main content
Fig. 2 | BMC Neuroscience

Fig. 2

From: SCN11A gene deletion causes sensorineural hearing loss by impairing the ribbon synapses and auditory nerves

Fig. 2

Distribution of Nav1.9 in primary auditory afferents. a The voltage-gated sodium channel Nav1.9 and Nav1.1 mRNA levels in modiolus of WT ICR mice at the postnatal 0, 7th, 14th, 21th, 28th and 60th day. Each time point contains 5 mice. *p = 0.028, **p = 0.004. b A schematic representing the localization of Nav1.9 channels at primary afferent peripheral nerve endings on hair cells in cochlea, in SGN somata, in the auditory nerve located within the modiolus, and in the cochlear nuclei. c Nav1.9 is present in cochlea basilar membrane by surface preparation technique and immunofluorescence staining in cryo-section. c1 Horizontal section showing three rows of OHCs and one row of IHCs. In a linear distribution below the IHCs, Nav1.9 (purple) is in the afferent endings beneath the IHC bases. Also stained are the afferent radial fibers leading through the tunnel of Corti to their first hemi-nodes beneath the foramina nervosa. Scales = 75 μm. c2 The diagram of the cochlea’s afferent innervations pattern. c3 Nav1.9 is in the nerve endings of internal spiral fibers or radial fibers beneath IHC (red), the cilia of which exhibit phalloidin labeling (green). Scales = 50 μm. c4 The high magnification image of c3. Scale = 10 μm. d The expression of Nav1.9 in the SGNs of P60 WT mouse was measured by immunofluorescence. Nav1.9, MBP, and cell nucleus are stained as red, green and blue, respectively. e Some neurons from the dorsal cochlear nucleus are labeled by Nav1.9 (red)

Back to article page