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Gene targeting for gene therapy: prospects
1Petersburg Nuclear Physics Institute, Russian Academy of Sciences, Gatchina/St. Petersburg, 188350, Russia.
Molecular Genetics and Metabolism
|October 21, 1999
Summary
Improving gene therapy requires efficient gene targeting in mammalian cells. Strategies like artificial DNA breaks, long homology, and recombinase overproduction enhance homologous recombination for genetic defect correction.
Area of Science:
- Molecular Biology
- Genetics
- Biotechnology
Background:
- Gene therapy aims to correct genetic defects but faces challenges with targeting efficiency in mammalian cells.
- Current gene targeting methods rely on homologous recombination or DNA heteroduplex mismatch correction.
Purpose of the Study:
- To explore strategies for enhancing the efficiency and accuracy of gene targeting in mammalian cells.
- To review advancements in homologous recombination-based gene targeting approaches.
Main Methods:
- Inducing artificial double-strand breaks in exogenous and chromosomal DNA.
- Utilizing contiguous long homology between targeting DNA and chromosomal DNA.
- Transient overproduction of recombinase proteins (e.g., RecA) in mammalian cell nuclei.
Main Results:
- Combining double-strand breaks, long homology, and recombinase overproduction can improve gene targeting protocols.
- Chimeric RNA/DNA oligonucleotides show promise in enhancing recombinogenic activity.
- RecA-like proteins can facilitate homology searching and stable DNA heteroduplex formation.
Conclusions:
- Enhanced homologous recombination is crucial for effective gene therapy.
- Novel oligonucleotide designs and recombinase applications offer promising avenues for improved gene targeting accuracy and efficiency.