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Related Experiment Videos

Delivery using herpes simplex virus: an overview.

William F Goins1, Darren Wolfe, David M Krisky

  • 1Department of Molecular Genetics and Biochemistry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.

Methods in Molecular Biology (Clifton, N.J.)
|February 19, 2004
PubMed
Summary
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Human herpesviruses, like herpes simplex virus type 1 (HSV-1), are promising gene vectors. Replication-defective HSV-1 can establish lifelong, non-reactivating latent infections in neurons for gene therapy.

Area of Science:

  • Virology
  • Gene Therapy
  • Molecular Biology

Background:

  • Human herpesviruses are large DNA viruses capable of lifelong latency.
  • Herpes simplex virus type 1 (HSV-1) naturally establishes latent infections in neurons as episomal DNA.
  • Latent HSV-1 genomes persist without causing disease in immunocompetent hosts.

Purpose of the Study:

  • To evaluate human herpesviruses, particularly HSV-1, as gene vector candidates.
  • To investigate the potential of replication-defective HSV-1 for persistent gene delivery.

Main Methods:

  • Analysis of herpesvirus characteristics for gene vector suitability.
  • Construction of replication-defective HSV-1 mutants.
  • Assessment of latency establishment and persistence in neurons.

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Main Results:

  • HSV-1 genomes can persist lifelong as nonintegrated episomes in neurons.
  • Replication-defective HSV-1 establishes quiescent latent infections.
  • Latent HSV-1 genomes retain the ability to express latency-associated transcripts (LATs).

Conclusions:

  • Replication-defective HSV-1 is a viable gene vector for establishing persistent, non-reactivating latent infections in neurons.
  • HSV-1's natural latency mechanisms are effective for long-term gene persistence without adverse effects.