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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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[Gene Replacement Therapy for Inherited Retinal Dystrophies].

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[Gene replacement therapy in achromatopsia type 2].

R Mühlfriedel1, N Tanimoto1, M W Seeliger1

  • 1Forschungsinstitut für Augenheilkunde, Department für Augenheilkunde, Eberhard Karls-Universität, Tübingen.

Klinische Monatsblatter Fur Augenheilkunde
|March 25, 2014
PubMed
Summary

Gene therapy successfully restored cone photoreceptor function in an animal model of achromatopsia (ACHM2). This breakthrough offers hope for treating this inherited retinal disease in humans.

Area of Science:

  • Ophthalmology
  • Genetics
  • Molecular Biology

Context:

  • Achromatopsia (ACHM2) is an inherited retinal disease causing complete loss of cone photoreceptor function.
  • Mutations in CNGA3, encoding a subunit of the cyclic nucleotide-gated (CNG) channel, are a common cause of achromatopsia.
  • CNGA3-deficient mice models exhibit cone photoreceptor dysfunction and degeneration, mirroring human disease.

Purpose:

  • To detail a recombinant adeno-associated virus (AAV)-based gene therapy approach for treating achromatopsia (ACHM2).
  • To describe non-invasive diagnostic techniques (ERG, SLO, OCT) for monitoring therapy quality and success.
  • To report the restoration of cone photoreceptor function and visual behavior in a mouse model.

Summary:

  • A gene therapy using recombinant adeno-associated virus (AAV) successfully treated achromatopsia (ACHM2) in a mouse model.

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  • The therapy restored cone photoreceptor function and associated neuronal signaling.
  • Non-invasive techniques like ERG, SLO, and OCT were used for quality control and success assessment.

    • Impact:

    • This study presents a successful gene therapy for achromatopsia in an animal model, demonstrating restored cone function and behavior.
    • The findings pave the way for the first human clinical translation of gene therapy for achromatopsia in Germany.
    • This research advances the potential treatment of inherited retinal diseases through gene augmentation strategies.