Cochlear supporting cell

Cochlear supporting cells are a heterogeneous population of non-sensory cells within the organ of Corti, including Deiters', pillar, Hensen's, and Claudius cells. They provide essential structural, metabolic, and homeostatic support to the sensory hair cells, which are responsible for converting sound vibrations into neural signals (Wan et al., 2013). A critical function of these cells is the maintenance of the endolymphatic potential through potassium ion recycling, a process vital for the sensitivity of hearing (Zheng et al., 2000). While mammalian cochlear supporting cells do not naturally regenerate lost hair cells, certain subpopulations, such as those expressing the Lgr5 marker, possess latent progenitor-like properties (McLean et al., 2017). In regenerative medicine, these cells are targeted to treat sensorineural hearing loss by inducing their conversion into new sensory hair cells. Pharmacological interventions often involve the use of Notch inhibitors, such as LY3056480, or Wnt signaling activators to trigger trans-differentiation or proliferation (Maass et al., 2015). However, therapeutic development faces significant challenges, including the risk of disrupting the cochlea's delicate structural architecture and the potential for off-target effects from modulating fundamental developmental pathways (Tona et al., 2014). Successful targeting of cochlear supporting cells represents a promising frontier for restoring hearing in patients with permanent auditory deficits.

Other names

Deiters' cellPillar cellHensen's cellClaudius cellInner phalangeal cellBorder cell

Induction of trans-differentiation into sensory hair cells via Notch signaling inhibition or Wnt signaling activation; stimulation of progenitor cell proliferation followed by differentiation.