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Research Article
Harmonin (Ush1c) is required in zebrafish Müller glial cells for photoreceptor synaptic development and function
Jennifer B. Phillips, Bernardo Blanco-Sanchez, Jennifer J. Lentz, Alexandra Tallafuss, Kornnika Khanobdee, Srirangan Sampath, Zachary G. Jacobs, Philip F. Han, Monalisa Mishra, David S. Williams, Bronya J. Keats, Philip Washbourne, Monte Westerfield
Disease Models & Mechanisms 2011 : dmm.006429 doi: 10.1242/dmm.006429 Published 14 July 2011
Jennifer B. Phillips
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Bernardo Blanco-Sanchez
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Jennifer J. Lentz
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Alexandra Tallafuss
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Kornnika Khanobdee
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Srirangan Sampath
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Zachary G. Jacobs
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Philip F. Han
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Monalisa Mishra
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David S. Williams
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Bronya J. Keats
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Philip Washbourne
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SUMMARY

Usher syndrome is the most prevalent cause of hereditary deaf-blindness, characterized by congenital sensorineural hearing impairment and progressive photoreceptor degeneration beginning in childhood or adolescence. Diagnosis and management of this disease are complex, and the molecular changes underlying sensory cell impairment remain poorly understood. Here we characterize two zebrafish models for a severe form of Usher syndrome, Usher syndrome type 1C (USH1C): one model is a mutant with a newly identified ush1c nonsense mutation, and the other is a morpholino knockdown of ush1c. Both have defects in hearing, balance and visual function from the first week of life. Histological analyses reveal specific defects in sensory cell structure that are consistent with these behavioral phenotypes and could implicate Müller glia in the retinal pathology of Usher syndrome. This study shows that visual defects associated with loss of ush1c function in zebrafish can be detected from the onset of vision, and thus could be applicable to early diagnosis for USH1C patients.

Footnotes

  • ↵* These authors contributed equally to this work

  • ↵‡ Present address: School of Biology, Institute of Science, Suranaree University of Technology, Muang, Nakhon Ratchasima 30000, Thailand

  • ↵§ Present address: Research School of Biology, Australian National University, Canberra, ACT 2601, Australia

  • Received July 30, 2010.
  • Accepted May 23, 2011.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial Share Alike License (http://creativecommons.org/licenses/by-nc-sa/3.0), which permits unrestricted non-commercial use, distribution and reproduction in any medium provided that the original work is properly cited and all further distributions of the work or adaptation are subject to the same Creative Commons License terms

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Harmonin (Ush1c) is required in zebrafish Müller glial cells for photoreceptor synaptic development and function
Jennifer B. Phillips, Bernardo Blanco-Sanchez, Jennifer J. Lentz, Alexandra Tallafuss, Kornnika Khanobdee, Srirangan Sampath, Zachary G. Jacobs, Philip F. Han, Monalisa Mishra, David S. Williams, Bronya J. Keats, Philip Washbourne, Monte Westerfield
Disease Models & Mechanisms 2011 : dmm.006429 doi: 10.1242/dmm.006429 Published 14 July 2011
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Harmonin (Ush1c) is required in zebrafish Müller glial cells for photoreceptor synaptic development and function
Jennifer B. Phillips, Bernardo Blanco-Sanchez, Jennifer J. Lentz, Alexandra Tallafuss, Kornnika Khanobdee, Srirangan Sampath, Zachary G. Jacobs, Philip F. Han, Monalisa Mishra, David S. Williams, Bronya J. Keats, Philip Washbourne, Monte Westerfield
Disease Models & Mechanisms 2011 : dmm.006429 doi: 10.1242/dmm.006429 Published 14 July 2011

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