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Related Experiment Videos

Dominant inheritance of optic pits

S T Stefko1, P Campochiaro, P Wang

  • 1Johns Hopkins Center for Hereditary Eye Diseases, Wilmer Ophthalmological Institute, USA.

American Journal of Ophthalmology
|July 1, 1997
PubMed
Summary

Familial optic pits can be inherited in an autosomal dominant pattern. Genetic analysis did not find mutations in the PAX2 gene, suggesting other genetic factors may be involved in optic pit development.

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Area of Science:

  • Ophthalmology
  • Medical Genetics

Background:

  • Optic pits are rare congenital abnormalities of the optic nerve head.
  • Their etiology is often unknown, and familial occurrence is infrequently reported.
  • The PAX2 gene is associated with renal-optic coloboma syndrome, a condition sometimes involving optic nerve abnormalities.

Purpose of the Study:

  • To document the occurrence of optic pits within a family across multiple generations.
  • To investigate the inheritance pattern of optic pits in this family.
  • To screen the PAX2 gene for mutations as a potential cause.

Main Methods:

  • A clinical family study was conducted.
  • Standard mutation analysis of all exons of the PAX2 gene was performed on affected individuals.

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Main Results:

  • Unilateral optic pits were identified in three generations of the studied family.
  • The condition demonstrated an autosomal dominant inheritance pattern.
  • No pathogenic mutations were detected in the coding regions of the PAX2 gene.

Conclusions:

  • Unilateral optic pits can exhibit autosomal dominant inheritance.
  • PAX2 gene mutations are not associated with optic pits in this family.
  • The genetic basis for optic pits in this cohort likely involves other genes or mechanisms.