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Gene Therapy Development Service

Gene therapy involves the delivery of genetic material into target cells to correct or compensate for defective genes responsible for disease. From vector design to preclinical studies, Protheragen offers comprehensive gene therapy development services for ophthalmic diseases.

Overview of Ocular Gene Therapy

With very little size, having easy access and being separated from severe immune reactions, the eye is a prime candidate for gene therapy. Gene therapies for eye diseases can reverse vision loss in inherited retinal disorders like Leber congenital amaurosis, and in some cases, delay retina deterioration in retinitis pigmentosa. They further enable effective therapeutics of age-related macular degeneration (AMD) by constantly producing required therapeutic proteins, offering long-lasting remission, and eliminating the need for recurrent injections.

Schematic diagram of the evolution from lentivirus to the third-generation lentiviral vector system.Fig.1 From lentivirus to 3rd generation lentiviral vector system. (Arsenijevic Y., et al., 2022)

Gene Therapy Development for Ophthalmic Diseases

Recently, the gene therapy field that deals with eye diseases has improved dramatically. A lot of attention has been put to the genetic basis of different eye disorders which has resulted in refined therapies. The first-ever gene therapy approved by the FDA, Luxturna, turned out to be a major success because it was able to restore vision by treating an inherited retinal disease. Current clinical studies are still trying to test different therapeutic methodologies for other diseases such as retinitis pigmentosa, Stargardt disease, and AMD, and the results seem to be positive. These results prove how deep gene therapy can fundamentally change the therapeutic methods of diseases pertaining to the eyes.

Table 1. Summary of gene therapies for ophthalmic diseases. (Ghoraba H. H., et al., 2022)

Ocular Site Disease Vector (Serotype) Drug Route Development Status Clinical Trial Number
Cornea Herpes simplex keratitis CRISPR/Cas9 mRNA instantaneous gene editing product BD111: adults single group dose Intracorneal injection Phase I/II NCT04560790
Glaucoma Ocular hypertension and open angle glaucoma siRNA SYL040012 (bamosiran) Topical instillation Phases I & II NCT01227291
Retinal diseases X-linked retinoschisis AAV (AAV8) AAV8-scRS/IRBPhRS Intravitreal injection Phase I/II NCT02317887
Retinal diseases X-linked retinoschisis AAV (AAV2) rAAV2tYF-CB-hRS1 Intravitreal injection Phase I/II NCT02416622
Retinal diseases Choroideremia AAV (AAV2) AAV2-hCHM Subretinal injection Phase I/II NCT02341807
Retinal diseases X-linked RP (RPGR gene) AAV (AAV2) rAAV2tYF-GRK1-RPGR Subretinal injection Phase I/II NCT03316560
Retinal diseases X-linked RP (RPGR gene) AAV 4D-125 Intravitreal injection Phase I/II NCT04517149
Retinal diseases RP (MERTK gene) AAV (AAV2) rAAV2-VMD2-hMERTK Subretinal injection Phase I NCT01482195
Retinal diseases Achromatopsia AAV (AAV2) rAAV2tYF-PR1.7-hCNGB3 Subretinal injection Phase I/II NCT01482195
Retinal diseases LCA (RPE65 gene) AAV (AAV2) rAAV2-CB-hRPE65 Subretinal injection Phase I/II NCT00749957
Retinal diseases ARMD (wet type) AAV (AAV8) AAV8.anti-VEGFfab (RGX-314) Suprachoroidal injection Phase I/II NCT03066258
Optic nerve diseases LHON AAV (AAV2) scAAV2-P1ND4v2 Intravitreal injection Phase I NCT02161380
Optic nerve diseases LHON AAV (AAV2) rAAV2-ND4 Intravitreal injection Phase II/III NCT03153293
Tumors Recurrent retinoblastoma Adenovirus Oncolytic Adenovirus VCN-01 Intravitreal injection Phase I NCT03284268

Disclaimer: Protheragen focuses on providing preclinical research service. This table is for information exchange purposes only. This table is not a treatment plan recommendation. For guidance on treatment options, please visit a regular hospital.

Our Services

Protheragen knows very well that each gene therapy project has its characteristics and must be approached differently. So, we provide services that suit the specifications of our clients. From designing custom vectors to preclinical studies, our specialists work hand in hand with clients to tailor solutions that meet their needs.

Vector Design and Optimization

Protheragen specializes in the design and optimization of viral vectors, such as adeno-associated virus (AAV) vectors, which are known for their ability to efficiently deliver genetic material to target cells with minimal immune response. Our team of scientists works closely with clients to select the most appropriate vector type and optimize its design for maximum efficacy and safety.

  • Viral Vector: lentiviral vectors, AAV vectors
  • Non-Viral Vector: liposomal vectors, nanoparticle vectors
  • Hybrid Vector: dendrimer-coated virus particles, virus particles encapsulated liposomes
  • Pseudotyped Viral Vector: VSV-G pseudotyped viral vectors, LCMV-GP pseudotyped viral vectors

In Vitro and In Vivo Testing

Our state-of-the-art laboratories are equipped with advanced technologies for conducting preclinical studies in animal models. We perform extensive in vitro and in vivo testing to evaluate the safety and efficacy of gene therapies. These studies provide critical data on transduction efficiency, immune response, and long-term effects, ensuring that only the most promising candidates proceed to clinical trials.

Types of Gene Therapy Development

Protheragen is committed to advancing the field of gene therapy for ophthalmic diseases, offering a comprehensive suite of services to support the development of these innovative therapeutics. If you are interested in our services, please feel free to contact us.

References

  • Arsenijevic, Yvan, et al. "Lentiviral vectors for ocular gene therapy." Pharmaceutics 14.8 (2022): 1605.
  • Ghoraba, Hashem H., et al. "Ocular gene therapy: a literature review with special focus on immune and inflammatory responses." Clinical Ophthalmology (2022): 1753-1771.