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Gene targeting by triple helix-forming oligonucleotides
Alokes Majumdar1, Nitin Puri, Nicholas McCollum
1Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224, USA.
Annals of the New York Academy of Sciences
|January 31, 2004
Summary
Triple helix-forming oligonucleotides (TFOs) show promise for gene targeting in mammalian cells. Oligonucleotide modifications and cell cycle manipulation enhance TFO bioactivity for genomic applications.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Gene targeting reagents are crucial for genomic manipulation, gene therapy, and basic research.
- Triple helix-forming oligonucleotides (TFOs) are being developed for gene targeting in mammalian cells.
- Challenges include physiological impediments, charge repulsion, and chromatin structure affecting TFO bioactivity.
Purpose of the Study:
- To develop an oligonucleotide modification format supporting TFO biological activity.
- To investigate the influence of cell biology, specifically the cell cycle, on TFO bioactivity.
Main Methods:
- Developing modified oligonucleotide formats for TFOs.
- Manipulating the cell cycle to assess its impact on TFOs.
- Assessing TFO bioactivity in living mammalian cells.
Main Results:
- A specific oligonucleotide modification format was identified that supports TFO biological activity.
- Cell cycle manipulation significantly influenced TFO bioactivity.
- These findings address key challenges in TFO-mediated gene targeting.
Conclusions:
- Modified TFOs demonstrate potential for effective gene targeting in mammalian cells.
- Cell cycle regulation is a critical factor in optimizing TFO-based gene targeting strategies.
- This research advances the development of TFOs for genomic applications and gene therapy.