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Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
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Herpes Virus Amplicon Vectors.

Suresh de Silva1, William J Bowers

  • 1Department of Biochemistry and Biophysics, University of Rochester, Rochester, NY 14642, USA; suresh_desilva@urmc.rochester.edu (S.d.S.).

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Summary
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Replication-defective Herpes Simplex Virus Type-1 (HSV-1) amplicons are versatile gene transfer tools with large capacity and low immunogenicity. Recent advances and challenges for HSV-1 amplicon clinical applications are discussed.

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Area of Science:

  • Gene Therapy
  • Virology
  • Molecular Biology

Background:

  • Herpes Simplex Virus Type-1 (HSV-1) amplicons have been utilized in gene therapy for approximately 25 years.
  • These viral vectors are recognized for their large transgene capacity, broad cellular tropism, and low immunogenicity.
  • Their genetic manipulability further enhances their utility as a gene transfer platform.

Purpose of the Study:

  • To review recent advancements in the design of HSV-1 amplicons.
  • To summarize the in vitro and in vivo applications of HSV-1 amplicon technology.
  • To identify current challenges hindering the clinical translation of HSV-1 amplicon gene transfer.

Main Methods:

  • Literature review of recent studies on HSV-1 amplicon development.
  • Analysis of published data on in vitro and in vivo applications.
  • Discussion of existing limitations and future prospects for clinical use.

Main Results:

  • HSV-1 amplicons demonstrate significant potential as gene delivery vehicles.
  • Diverse applications in preclinical research have been established.
  • Key challenges include optimizing production, delivery, and long-term safety for clinical trials.

Conclusions:

  • HSV-1 amplicons represent a promising gene therapy platform with notable advantages.
  • Continued research and development are crucial to overcome existing hurdles for clinical application.
  • Further investigation is needed to fully realize the therapeutic potential of HSV-1 amplicon vectors.