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Stable and efficient gene transfer into the retina using an HIV-based lentiviral vector
H Miyoshi1, M Takahashi, F H Gage
1Laboratory of Genetics, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.
Summary
HIV-based lentiviral vectors efficiently transfer genes into retinal cells, including photoreceptor cells and retinal pigment epithelium. This method shows promise for treating retinal diseases like retinitis pigmentosa.
Area of Science:
- Ophthalmology
- Molecular Biology
- Gene Therapy
Background:
- Efficient gene transfer to terminally differentiated retinal cells is crucial for understanding retinal function and developing gene therapies.
- Lentiviral vector systems based on Human Immunodeficiency Virus (HIV) have demonstrated efficacy in transducing terminally differentiated neurons in vivo.
Purpose of the Study:
- To evaluate the capability of HIV-based lentiviral vectors for gene transfer into retinal cells.
- To assess the expression patterns and persistence of genes delivered via HIV vectors in the retina.
Main Methods:
- An HIV vector encoding the green fluorescent protein (GFP) was administered into the subretinal space of rat eyes.
- Gene expression was analyzed using different promoters (cytomegalovirus and rhodopsin) to determine cell-specific transduction and long-term expression.
Main Results:
- Efficient expression of the GFP gene was observed in both photoreceptor cells and retinal pigment epithelium when driven by the cytomegalovirus promoter.
- The rhodopsin promoter primarily directed GFP expression to photoreceptor cells.
- Sustained GFP expression was detected in over 80% of the retinal area in successfully transduced eyes for at least 12 weeks.
Conclusions:
- HIV-based lentiviral vectors provide efficient gene transfer to terminally differentiated retinal cells, particularly photoreceptors.
- The sustained expression achieved with these vectors holds significant potential for the gene therapy of inherited retinal diseases, such as retinitis pigmentosa.