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Gene Therapies for Retinitis Pigmentosa that Target Glucose Metabolism

Yunlu Xue1, Constance L Cepko2

  • 1Lingang Laboratory, Shanghai 200031, China ylxue@lglab.ac.cn cepko@genetics.med.harvard.edu.

Cold Spring Harbor Perspectives in Medicine
|July 17, 2023
PubMed

Insights

Gene therapy may treat retinitis pigmentosa by addressing a glucose shortage in cone photoreceptors, which die secondarily to rod loss. This approach targets a potential metabolic cause of cone degeneration.

Area of Science:

  • Ophthalmology
  • Genetics
  • Cell Biology

Background:

  • Retinitis pigmentosa (RP) is a group of inherited retinal diseases causing progressive vision loss.
  • RP initially affects rod photoreceptors, leading to night blindness, followed by cone photoreceptor degeneration and further vision impairment.
  • The precise mechanisms driving secondary cone death in RP remain incompletely understood.

Purpose of the Study:

  • This review explores gene therapy strategies for retinitis pigmentosa.
  • It specifically focuses on addressing the potential metabolic deficit, particularly glucose availability, in cone photoreceptors during RP progression.

Main Methods:

  • The review synthesizes current research on the metabolic demands of photoreceptors.
  • It examines the role of glucose metabolism in cone survival.
  • It discusses various gene therapy approaches aimed at ameliorating metabolic dysfunction in cones.

Main Results:

  • Photoreceptors, especially cones, have high energy requirements and depend on glucose.
  • Early stages of RP degeneration suggest cones experience a glucose shortage.
  • Gene therapy offers potential to correct metabolic issues contributing to cone loss.

Conclusions:

  • Targeting the metabolic shortcomings, such as glucose availability, in cone photoreceptors is a promising therapeutic avenue for retinitis pigmentosa.
  • Gene therapy presents a viable strategy to potentially preserve cone function and vision in RP patients.

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