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

Authors: Robertson, NG  Lu, L  Heller, S  Merchant, SN  Eavey, RD  McKenna, M  Nadol JB, JR  Miyamoto, RT  Linthicum FH, JR  Lubianca Neto, JF  Hudspeth, AJ  Seidman, CE  Morton, CC  Seidman, JG 
Citation: Robertson NG, etal., Nat Genet. 1998 Nov;20(3):299-303.
Pubmed: (View Article at PubMed) PMID:9806553
DOI: Full-text: DOI:10.1038/3118

DFNA9 is an autosomal dominant, nonsyndromic, progressive sensorineural 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.


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RGD Object Information
RGD ID: 1600878
Created: 2007-03-29
Species: All species
Last Modified: 2007-03-29
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.