Gene Therapy for Stargardt Disease Associated with ABCA4 Gene

Conference paper

DOI: 10.1007/978-1-4614-3209-8_90

Volume 801 of the book series Advances in Experimental Medicine and Biology
Cite this paper as:
Han Z., Conley S., Naash M. (2014) Gene Therapy for Stargardt Disease Associated with ABCA4 Gene. In: Ash J., Grimm C., Hollyfield J., Anderson R., LaVail M., Bowes Rickman C. (eds) Retinal Degenerative Diseases. Advances in Experimental Medicine and Biology, vol 801. Springer, New York, NY

Abstract

Mutations in the photoreceptor-specific flippase ABCA4 lead to accumulation of the toxic bisretinoid A2E, resulting in atrophy of the retinal pigment epithelium (RPE) and death of the photoreceptor cells. Many blinding diseases are associated with these mutations including Stargardt’s disease (STGD1), cone-rod dystrophy, retinitis pigmentosa (RP), and increased susceptibility to age-related macular degeneration. There are no curative treatments for any of these dsystrophies. While the monogenic nature of many of these conditions makes them amenable to treatment with gene therapy, the ABCA4 cDNA is 6.8 kb and is thus too large for the AAV vectors which have been most successful for other ocular genes. Here we review approaches to ABCA4 gene therapy including treatment with novel AAV vectors, lentiviral vectors, and non-viral compacted DNA nanoparticles. Lentiviral and compacted DNA nanoparticles in particular have a large capacity and have been successful in improving disease phenotypes in the Abca4-/- murine model. Excitingly, two Phase I/IIa clinical trials are underway to treat patients with ABCA4-associated Startgardt’s disease (STGD1). As a result of the development of these novel technologies, effective therapies for ABCA4-associated diseases may finally be within reach.

Keywords

ABCA4 Gene therapy Nanoparticles Lentivirus STGD1 Viral Non-viral 

Copyright information

© Springer Science+Business Media, LLC 2014

Authors and Affiliations

  • Zongchao Han
    • 1
  • Shannon M. Conley
    • 1
  • Muna I. Naash
    • 1
  1. 1.Department of Cell BiologyUniversity of Oklahoma Health Sciences CenterOklahoma CityUSA