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Prospects and problems of gene therapy: an update
1Molecular Medicine Unit, School of Pharmacy and Biomedical Sciences, University of Portsmouth, St. Michael's Building, White Swan Road, Portsmouth, PO1 2DT, UK. darek.gorecki@port.ac.uk
Expert Opinion on Emerging Drugs
|July 2, 2005
Summary
Gene therapy delivers genes to treat diseases, with viral vectors being a common method. Current research focuses on improving gene delivery, expression, and overcoming challenges like immune responses and safety concerns.
Area of Science:
- Biotechnology
- Molecular Biology
- Genetics
Background:
- Gene therapy offers diverse approaches, including gene addition, genome modification, and cell injection.
- Repairing mutated genes in target tissues is the ultimate goal, but current techniques are still developing.
- Gene addition via vectors is the predominant method, applicable to genetic disorders, cancer, cardiovascular diseases, and infections.
Purpose of the Study:
- To review current gene therapy strategies, focusing on vectors, delivery methods, and expression regulation.
- To identify major research areas and challenges in developing effective gene therapy clinical products.
- To highlight recent advancements and persistent obstacles in the field of gene therapy.
Main Methods:
- Utilizing viral and non-viral vectors for ex vivo and in vivo gene targeting.
- Investigating methods for regulating transgene expression.
- Assessing the stability of gene expression in therapeutic applications.
Main Results:
- Significant technical achievements and initial positive clinical results have emerged.
- Key challenges include low and unstable transgene expression, and immune responses to vectors and gene products.
- Safety concerns, including a death linked to gene therapy, remain critical.
Conclusions:
- Progress in adeno-associated virus (AAV) and lentiviral vectors, gene expression regulation, and stem cell technology are promising.
- Overcoming barriers to expression stability and immune tolerance is crucial for clinical success.
- Continued research is essential to refine gene therapy safety and efficacy for broader therapeutic applications.