Mutations in a novel cochlear gene cause DFNA9, a human nonsyndromic deafness with vestibular dysfunction

Nahid G. Robertson, Leonard Lu, Stefan Heller, Saumil N. Merchant, Roland D. Eavey, Michael McKenna, Joseph B. Nadol, Richard T. Miyamoto, Frederick H. Linthicum, José F. Lubianca Neto, A. J. Hudspeth, Christine E. Seidman, Cynthia C. Morton, J. G. Seidman

Research output: Contribution to journalArticlepeer-review

264 Scopus citations


DFNA9 is an autosomal dominant, nonsyndromic, progressive sensorineurat hearing loss with vestibular pathology. Here we report three missense mutations in human COCH (previously described as Coch5b2), a novel cochlear gene, in three unrelated kindreds with DFNA9. All three residues mutated in DFNA9 are conserved in mouse and chicken Coch, and are found in a region containing four conserved cysteines with homology to a domain in factor C, a lipopolysaccharide-binding coagulation factor in Limulus polyphemus. COCH message, found at high levels in human cochlear and vestibular organs, occurs in the chicken inner ear in the regions of the auditory and vestibular nerve fibres, the neural and abneural limbs adjacent to the cochlear sensory epithelium and the stroma of the crista ampullaris of the vestibular labyrinth. These areas correspond to human inner ear structures which show histopathological findings of acidophilic ground substance in DFNA9 patients.

Original languageEnglish (US)
Pages (from-to)299-303
Number of pages5
JournalNature genetics
Issue number3
StatePublished - Nov 17 1998

ASJC Scopus subject areas

  • Genetics

Fingerprint Dive into the research topics of 'Mutations in a novel cochlear gene cause DFNA9, a human nonsyndromic deafness with vestibular dysfunction'. Together they form a unique fingerprint.

Cite this