Vascular Defects and Sensorineural Deafness in a Mouse Model of Norrie Disease
2002; Society for Neuroscience; Volume: 22; Issue: 11 Linguagem: Inglês
10.1523/jneurosci.22-11-04286.2002
ISSN1529-2401
AutoresHeidi L. Rehm, Duan-Sun Zhang, M. Christian Brown, Barbara J. Burgess, Chris Halpin, Wolfgang Berger, Cynthia C. Morton, David P. Corey, Zheng‐Yi Chen,
Tópico(s)Retinal Development and Disorders
ResumoNorrie disease is an X-linked recessive syndrome of blindness, deafness, and mental retardation. A knock-out mouse model with an Ndp gene disruption was studied. We examined the hearing phenotype, including audiological, histological, and vascular evaluations. As is seen in humans, the mice had progressive hearing loss leading to profound deafness. The primary lesion was localized to the stria vascularis, which houses the main vasculature of the cochlea. Fluorescent dyes showed an abnormal vasculature in this region and eventual loss of two-thirds of the vessels. We propose that one of the principal functions of norrin in the ear is to regulate the interaction of the cochlea with its vasculature.
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