Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/18500
Title: Progressive Characterization of Visual Phenotype in Bardet-Biedl Syndrome Mutant MiceVisual Phenotype in Bardet-Biedl Syndrome Mice
Authors: Kretschmer, V
Patnaik, SR
Kretschmer, F
Chawda, MM
Hernandez-Hernandez, V
May-Simera, HL
Keywords: Bardet-Biedl syndrome;BBSome;Primary cilia;Retinal disease;Mouse mutants
Issue Date: 2019
Publisher: Association for Research in Vision and Ophthalmology
Citation: Investigative Ophthalmology & Visual Science, 2019, 60 pp. 1132 - 1143
Abstract: Bardet-Biedl syndrome (BBS) is an archetypical ciliopathy caused by defective ciliary trafficking and consequent function. Insights gained from BBS mouse models are applicable to other syndromic and nonsyndromic retinal diseases. This progressive characterization of the visual phenotype in three BBS mouse models sets a baseline for testing therapeutic interventions. Longitudinal acquisition of electroretinograms, optical coherence tomography scans, and visual acuity using the optomotor reflex in Bbs6/Mkks, Bbs8/Ttc8, and Bbs5 knockout mice. Gene and protein expression analysis in vivo and in vitro. Complete loss of BBS5, BBS6, or BBS8 leads to different rates of retinal degeneration and visual function over time. BBS8-deficient mice showed the fastest rate of degeneration, and BBS8 seems to be required for cone photoreceptors to reach functional maturity. In contrast, the loss of BBS5 (a further BBSome component) showed very little degeneration. Loss of BBS8 versus BBS5 resulted in different physiologic responses both in vivo and in vitro. BBS6-deficient mice show a slower rate of degeneration with both rod and cone function reducing at a similar rate. The mouse models analyzed show distinct and diverging courses of degeneration upon loss of BBS5, BBS6, or BBS8, which can be used as a benchmark to test therapeutic interventions. Close consideration of the different phenotypes reveal subtle but important differences relating to their function. Because we also see differences in terms of phenotype depending on the type of visual assessment used, our data highlight the importance of using a combinatorial approach for assessment of visual function.
URI: http://bura.brunel.ac.uk/handle/2438/18500
DOI: http://dx.doi.org/10.1167/iovs.18-25210
ISSN: 1552-5783
Appears in Collections:Dept of Life Sciences Research Papers

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