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Mitochondrial Genetics and Optic Neuropathy.

Janey L Wiggs1

  • 1Department of Ophthalmology, Harvard Medical School and Massachusetts Eye and Ear, Boston, Massachusetts 02114;

Annual Review of Vision Science
|May 24, 2017
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Summary
This summary is machine-generated.

Mitochondrial dysfunction causes optic nerve disease and blindness. Genetic mutations affecting mitochondrial network dynamics and energy production are key factors, guiding gene therapies and genetic counseling for visual system disorders.

Keywords:
iron-sulfur complexesmitochondriamitochondrial networkoptic neuropathyoxidative phosphorylationpapillomacular bundlevisual field

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Area of Science:

  • Ophthalmology
  • Genetics
  • Mitochondrial Biology

Background:

  • Mitochondrial dysfunction is implicated in various human diseases, notably those affecting the visual system.
  • Retinal ganglion cells, crucial for vision, are vulnerable to mitochondrial-related damage, potentially leading to blindness.
  • Optic nerve diseases can arise from mutations in both mitochondrial DNA (mtDNA) and nuclear genes.

Purpose of the Study:

  • To review the genetic basis of mitochondrial optic neuropathies.
  • To highlight the role of mitochondrial network dynamics, oxidative phosphorylation, and iron-sulfur cluster biogenesis in these diseases.
  • To discuss the implications of genetic knowledge for counseling and therapeutic strategies.

Main Methods:

  • Literature review of genetic mutations and mitochondrial pathways involved in optic neuropathies.
  • Analysis of the impact of impaired mitochondrial functions on retinal ganglion cells.
  • Synthesis of current genetic knowledge and its therapeutic potential.

Main Results:

  • Mutations affecting mitochondrial network dynamics (fusion/fission), oxidative phosphorylation (OXPHOS), and iron-sulfur cluster formation are significant contributors to optic nerve disease.
  • Genetic factors play a critical role in the pathogenesis of mitochondrial optic neuropathies.
  • Understanding these genetic underpinnings is essential for developing targeted therapies.

Conclusions:

  • Genetic insights into mitochondrial dysfunction provide a basis for improved genetic counseling.
  • Identifying novel genes and understanding existing ones are crucial for developing effective, potentially neuroprotective, gene-based therapies for mitochondrial optic neuropathies.