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Related Experiment Videos

Adenovirus vector expressing functional herpes simplex virus ICP0.

X X Zhu1, C S Young, S Silverstein

  • 1Department of Microbiology, College of Physicians and Surgeons, Columbia University, New York, New York 10032.

Journal of Virology
|December 1, 1988
PubMed
Summary

Herpes simplex virus ICP0 protein, a potent transcription activator, was studied using recombinant adenoviruses. Results show ICP0 is biologically active and can transactivate gene expression, despite not substituting for adenovirus E1a functions.

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Area of Science:

  • Virology
  • Molecular Biology
  • Gene Regulation

Background:

  • Herpes simplex virus (HSV) immediate-early (IE) protein ICP0 is a known potent activator of transcription.
  • Understanding ICP0's biological activities and mechanisms is crucial for viral research.

Purpose of the Study:

  • To assess the biological activities of HSV ICP0.
  • To explore the mechanisms of ICP0 action using recombinant adenoviruses.

Main Methods:

  • Construction of two helper-independent recombinant adenoviruses with ICP0 gene.
  • ICP0 gene controlled by either adenovirus major late promoter (MLP-0) or HSV IE-0 promoter (0PRO-0).
  • Infection of HeLa and 293 cells to analyze ICP0 mRNA and protein synthesis, viral replication, and gene transactivation.

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Main Results:

  • Recombinant adenovirus MLP-0 produced more ICP0 mRNA and protein than 0PRO-0 in HeLa and 293 cells.
  • ICP0 did not substitute for adenovirus E1a in supporting viral DNA replication in HeLa cells.
  • Recombinant adeno-ICP0 viruses demonstrated biological activity by transactivating a transfected TK-CAT cassette.

Conclusions:

  • ICP0 is biologically active and capable of transactivating gene expression.
  • Recombinant adenoviruses are viable tools for studying ICP0's functions.
  • ICP0's role in viral transcription activation is confirmed, though it cannot replace essential adenovirus functions.