Stable gene transfer to the nervous system using a non-primate lentiviral vector

Area of Science:

• * Molecular Biology
• * Virology
• * Neuroscience

Background:

• * Lentiviral vectors are crucial tools for gene delivery.
• * Current vectors often derived from human immunodeficiency virus (HIV) raise safety concerns.
• * Need for non-primate lentiviral vectors for gene therapy.

Purpose of the Study:

• * To construct and characterize a non-primate lentiviral vector system based on equine infectious anemia virus (EIAV).
• * To assess the transduction efficiency of EIAV-based vectors in various cell types, including neural cells.
• * To identify the essential EIAV proteins for vector function and production.

Main Methods:

• * Construction of a lentiviral vector system using EIAV genetic components.
• * Transduction of dividing and non-dividing cells, including primary neurons and cells within the adult rat central nervous system (CNS).
• * Pseudotyping with different viral envelopes (e.g., rabies G, MLV 4070A) and concentration to high titers.

Main Results:

• * EIAV-based vectors efficiently transduced both dividing and non-dividing cells, including primary hippocampal neurons and adult rat CNS neurons/glia.
• * Transduction efficiencies were comparable to HIV-based vectors.
• * Only EIAV gag/pol and rev proteins were required for vector activity and production; pol-encoded dUTPase activity was dispensable.
• * Vectors could be pseudotyped and concentrated to high titers.

Conclusions:

• * A functional non-primate lentiviral vector system based on EIAV has been successfully developed.
• * EIAV vectors demonstrate broad tropism, efficiently transducing various cell types, including non-dividing neural cells.
• * This EIAV-based system offers a safe and effective alternative to primate-derived lentiviral vectors for gene therapy.