HSV amplicon vectors for cancer therapy

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Updated: Aug 7, 2026

Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
12:42

Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo

Published on: January 7, 2019

Khalid Shah1, Xandra O Breakefield

  • 1Center for Molecular Imaging Research and Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02129, USA. kshah@helix.mgh.harvard.edu

Current Gene Therapy
|June 22, 2006
PubMed

Insights

Herpes simplex virus (HSV) amplicon vectors offer a powerful platform for cancer gene therapy due to their large capacity and versatility. These vectors enable targeted delivery of therapeutic genes, enhancing anti-tumor immunity and treatment efficacy.

Area of Science:

  • Oncolytic virotherapy
  • Gene therapy
  • Cancer research

Background:

  • Herpes simplex virus (HSV) amplicon vectors are advanced tools for cancer treatment.
  • They possess a large transgene capacity (up to 150 kb), allowing for multiple and large gene insertions.
  • Methods for heritable transgene transmission via episomal replication or genomic integration have been developed.

Purpose of the Study:

  • To explore the therapeutic potential of HSV amplicon vectors in cancer treatment.
  • To highlight the versatility of these vectors in delivering various therapeutic agents and facilitating gene expression control.
  • To investigate their utility in combination therapies and diagnostic applications.

Main Methods:

  • Incorporation of therapeutic transgenes, including anti-angiogenic agents, immune enhancers, and apoptosis-inducing factors.
  • Combination of amplicon vectors with oncolytic HSV vectors for broader therapeutic applications.
  • Utilizing promoter manipulation for targeted gene expression and drug-regulated expression.
  • Employing vectors for tumor vaccination via dendritic cell targeting.
  • Converting tumor cells into packaging cells for generating other viral vectors.
  • Exploring imaging modalities for monitoring gene delivery and therapeutic response.

Main Results:

  • Demonstrated capacity to carry large transgenes and control their fate in host cells.
  • Successful delivery of various therapeutic payloads, including inhibitory RNAs.
  • Enhanced tumor vaccination through high infectivity of dendritic cells and intrinsic immune-enhancing properties.
  • Capability to target both dividing and non-dividing tumor cells.
  • Versatility in generating vectors in situ and monitoring treatment outcomes via imaging.

Conclusions:

  • HSV amplicon vectors represent a highly adaptable and potent platform for cancer gene therapy.
  • Their large capacity, targeted delivery, and immune-modulating properties offer significant therapeutic advantages.
  • These vectors hold promise for combination therapies, in situ vector generation, and advanced imaging applications in oncology.

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