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Mouse Eye Enucleation for Remote High-throughput Phenotyping
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Published on: November 19, 2011

Ccdc66 null mutation causes retinal degeneration and dysfunction.

Wanda M Gerding1, Sabrina Schreiber, Tobias Schulte-Middelmann

  • 1Department of Human Genetics, Ruhr-University,44780 Bochum, Germany.

Human Molecular Genetics
|June 18, 2011
PubMed
Summary
This summary is machine-generated.

A new Ccdc66 mutant mouse model shows early, progressive retinal degeneration, mimicking human retinitis pigmentosa (RP). This discovery aids in understanding RP pathogenesis and developing future therapies.

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Area of Science:

  • Genetics and Molecular Biology
  • Ophthalmology
  • Animal Models of Disease

Background:

  • Retinitis pigmentosa (RP) encompasses diverse retinal disorders caused by mutations in over 100 genes.
  • Canine and murine models with naturally occurring mutations offer valuable insights into human RP.
  • A mutation in the CCDC66 gene causes generalized progressive retinal atrophy (gPRA) in Schapendoes dogs, a condition analogous to RP.

Purpose of the Study:

  • To investigate the function of protein CCDC66 and the pathogenesis of gPRA using a novel mouse model.
  • To characterize the effects of Ccdc66 gene disruption on retinal structure and function.
  • To establish a new mouse model for studying rod-cone dysplasia.

Main Methods:

  • Generation and characterization of Ccdc66 knockout mice.
  • Light and electron microscopy for retinal structure analysis.
  • Electroretinography (ERG) to assess retinal function.
  • Subcellular analysis to determine protein localization.

Main Results:

  • Ccdc66 mutant mice exhibited early photoreceptor degeneration and progressive retinal atrophy.
  • ERG revealed reduced scotopic a-wave and early photopic b-wave dysfunction.
  • Protein CCDC66 is highly expressed in developing rod outer segments, crucial for early retinal development.

Conclusions:

  • The absence of protein CCDC66 leads to early-onset, slow progressive rod-cone dysplasia in mice.
  • The novel Ccdc66 mutant mouse model is suitable for studying RP pathogenesis.
  • This model provides a basis for developing therapeutic strategies for RP and related disorders.