Target intelligence / Profile preview

Otospiralin (OTOS)

Target: OTOS
Molecular classification: Other (secreted protein; not an enzyme, receptor, transporter, or ion channel)

Overview

Otospiralin is a novel 6.4 kDa protein synthesized by nonsensory inner ear fibrocytes. It is highly conserved among mammals and specifically expressed in the cochlea and vestibule. Otospiralin plays a crucial role in the survival and maintenance of neurosensory epithelium: experimental downregulation in animal models leads to irreversible deafness by inducing degeneration of hair cells in the organ of Corti. The precise molecular function remains unknown, but sequence analysis reveals partial homology to a retroviral nucleocapsid protein, suggesting a dedicated and possibly unique role in inner ear physiology. There are no known drugs that target otospiralin, and it is not a current focus for therapeutic intervention or biomarker development. Defects or downregulation of otospiralin have been implicated experimentally in hearing loss, but human genetic studies do not show a direct causal relationship between OTOS mutations and inherited deafness.

Other names: OTOSPOtospiralinOTOSOTOSP_HUMAN (UniProt)

Mechanism of action

null

Biological functions

Maintenance of inner ear fibrocyte integritySurvival of neurosensory epitheliumAuditory function/homeostasis

Disease associations

Deafness (both syndromic and nonsyndromic forms; experimental knockdown causes rapid, irreversible hearing loss)No specific role in other major diseases is documented

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