A group of progenitor cells in the inner ear that can become the sensory hair cells and adjacent supporting cells that enable hearing have been identified, a potential breakthrough for people suffering from hearing loss due to damaged or impaired sensory hair cells, according to a paper in Development.
The inner ear is a highly specialized structure for gathering and transmitting vibrations in the air. The auditory compartment, called the cochlea, is a snail-shaped cavity that houses specialized cells with hair-like projections that sense vibration, much like seaweed waving in the ocean current. These hair cells are responsible for both hearing and balance, and are surrounded by supporting cells that are also critical for hearing.