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Inhibition of cellular Cdk2 activity blocks human cytomegalovirus replication

W A Bresnahan1, I Boldogh, P Chi

  • 1Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston 77550, USA.

Virology
|May 12, 1997
PubMed

Insights

Human cytomegalovirus (HCMV) requires cellular cyclin-dependent kinase 2 (Cdk2) for replication. Inhibiting Cdk2 activity blocks HCMV DNA synthesis, progeny production, and viral antigen expression, indicating Cdk2 is essential for the virus.

Area of Science:

  • Virology
  • Molecular Biology
  • Cell Biology

Background:

  • Human cytomegalovirus (HCMV) is a ubiquitous herpesvirus that manipulates host cellular processes.
  • Cellular cyclin-dependent kinase 2 (Cdk2) plays a crucial role in regulating the cell cycle at the G1 and S phases.

Purpose of the Study:

  • To investigate the necessity of cellular Cdk2 activity for HCMV replication.
  • To determine if inhibiting Cdk2 impacts HCMV infection outcomes.

Main Methods:

  • Inhibition of Cdk2 activity using the specific inhibitor roscovitine.
  • Expression of a dominant-negative Cdk2 mutant in infected cells.
  • Assessment of HCMV DNA synthesis, infectious progeny production, and late antigen expression.

Main Results:

  • Roscovitine treatment inhibited HCMV DNA synthesis, progeny production, and late antigen expression in a dose-dependent manner.
  • Expression of a dominant-negative Cdk2 mutant significantly blocked HCMV replication.
  • Expression of wild-type Cdk2 did not affect viral replication.

Conclusions:

  • Cellular Cdk2 activation is a necessary event for successful HCMV replication.
  • Targeting Cdk2 activity represents a potential antiviral strategy against HCMV infections.

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