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Advances in AAV Vector Development for Gene Therapy in the Retina

  • Timothy P. Day
  • Leah C. Byrne
  • David V. Schaffer
  • John G. FlanneryEmail author
Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 801)

Abstract

Adeno-associated virus (AAV) is a small, non-pathogenic dependovirus that has shown great potential for safe and long-term expression of a genetic payload in the retina. AAV has been used to treat a growing number of animal models of inherited retinal degeneration, though drawbacks—including a limited carrying capacity, slow onset of expression, and a limited ability to transduce some retinal cell types from the vitreous—restrict the utility of AAV for treating some forms of inherited eye disease. Next generation AAV vectors are being created to address these needs, through rational design efforts such as the creation of self-complementary AAV vectors for faster onset of expression and specific mutations of surface-exposed residues to increase transduction of viral particles. Furthermore, directed evolution has been used to create, through an iterative process of selection, novel variants of AAV with newly acquired, advantageous characteristics. These novel AAV variants have been shown to improve the therapeutic potential of AAV vectors, and further improvements may be achieved through rational design, directed evolution, or a combination of these approaches, leading to broader applicability of AAV and improved treatments for inherited retinal degeneration.

Keywords

Adeno-associated virus Gene therapy Mutagenesis Directed evolution Retinal degeneration 

Abbreviations

AAV

Adeno-associated virus

ITR

Inverted terminal repeats

RPE

Retinal pigment epithelium

LCA2

Leber’s congenital amaurosis type 2

scAAV

Self-complementary adeno-associated virus

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Copyright information

© Springer Science+Business Media, LLC 2014

Authors and Affiliations

  • Timothy P. Day
    • 1
  • Leah C. Byrne
    • 1
  • David V. Schaffer
    • 1
    • 2
  • John G. Flannery
    • 1
    Email author
  1. 1.Helen Wills Neuroscience InstituteThe University of California BerkeleyBerkeleyUSA
  2. 2.Department of Chemical and Biomolecular EngineeringThe University of CaliforniaBerkeleyUSA

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