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Related Experiment Videos

Gene therapy: promises and problems.

A Pfeifer1, I M Verma

  • 1The Salk Institute, La Jolla, California 92037, USA. apfeifer@ems.salk.edu

Annual Review of Genomics and Human Genetics
|November 10, 2001
PubMed
Summary
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Gene therapy uses viral vectors to deliver genetic material for treating diseases. Current viral vectors show promise but require further development for safe and effective clinical use in humans.

Area of Science:

  • Biotechnology
  • Molecular Biology
  • Virology

Background:

  • Gene therapy aims to treat diseases by transferring genetic material into cells.
  • Viruses are engineered as vectors to deliver therapeutic genes.
  • Viral vectors are classified as RNA or DNA based.

Purpose of the Study:

  • To review current viral vector systems for gene therapy.
  • To discuss the limitations of existing vectors.
  • To highlight the need for improved vector development.

Main Methods:

  • Classification of viral vectors based on their genome (RNA vs. DNA).
  • Discussion of retroviral vectors, including lentiviral vectors derived from HIV.
  • Overview of DNA viral vectors, such as adenoviruses and adeno-associated viruses.

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Main Results:

  • Simple retroviral vectors cannot transduce nondividing cells.
  • Lentiviral vectors show potential for transducing nondividing cells.
  • Adenovirus and adeno-associated virus vectors are commonly used DNA vectors.

Conclusions:

  • Existing viral vector systems can deliver genes in vivo.
  • The ideal gene therapy delivery vehicle has not yet been identified.
  • Further research and caution are necessary for the clinical application of viral vectors.