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Peter McGannon1, Yasumasa Miyazaki, Pankaj C Gupta

  • 1Center for Genetic Eye Diseases, Cole Eye Institute, Cleveland, OH 44195, USA.

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A novel mouse model lacking the Ski proto-oncogene develops persistent hyperplastic primary vitreous (PHPV) and other ocular abnormalities, offering insights into human developmental eye disorders.

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Area of Science:

  • Developmental biology
  • Ophthalmology
  • Genetics

Background:

  • Persistent hyperplastic primary vitreous (PHPV) is a congenital ocular malformation.
  • PHPV often occurs with other ocular abnormalities.
  • A novel mouse model for PHPV has been developed.

Purpose of the Study:

  • To investigate the role of the Ski proto-oncogene in ocular development.
  • To characterize ocular abnormalities in a novel Ski-/- mouse model.
  • To compare findings in the mouse model to human PHPV and related conditions.

Main Methods:

  • Morphologic and histologic analyses of Ski-/- mice.
  • Immunohistochemical studies using markers like Pax6, beta-III tubulin, and Flk1.
  • Comparison of ocular development in mutant and wild-type littermates.

Main Results:

  • Ski-/- mice exhibited 100% incidence of PHPV and microphthalmia.
  • Anterior segment dysgenesis, lens defects, retinal folds, and Peters anomaly were observed.
  • PHPV tissue was vascular, lacked neuronal markers, and contained no pigmented cells.

Conclusions:

  • Normal ocular development requires Ski proto-oncogene function.
  • Ski-/- mice display features of human PHPV and Peters anomaly.
  • Ski may regulate ocular development by modulating retinoic acid signaling.