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Updated: Jun 23, 2026

MicroRNA-based Regulation of Picornavirus Tropism
09:05

MicroRNA-based Regulation of Picornavirus Tropism

Published on: February 6, 2017

p53-dependent antiviral RNA-interference facilitates tumor-selective viral replication

Engin Gürlevik1, Norman Woller, Peter Schache

  • 1Department of Gastroenterology, Hepatology and Endocrinology, Medical School Hannover, Carl Neuberg Str. 1, 30625 Hannover, Germany.

Nucleic Acids Research
|May 16, 2009
PubMed

Insights

This study developed an adenovirus using RNA-interference (RNAi) to target p53-dysfunctional tumors. The novel virus selectively replicates in and lyses these tumors while minimizing liver viral load, offering a promising cancer therapy.

Area of Science:

  • Oncolytic virotherapy
  • Molecular biology
  • Gene therapy

Background:

  • RNA-interference (RNAi) enables specific gene silencing.
  • Adenoviruses are utilized as vectors for gene therapy and cancer treatment.
  • p53 tumor suppressor protein plays a critical role in cell cycle regulation and apoptosis.

Purpose of the Study:

  • To engineer an adenovirus for conditional replication in p53-dysfunctional tumor cells.
  • To utilize a microRNA-network for p53-selective gene silencing of essential viral genes.
  • To evaluate the therapeutic efficacy and safety of the developed oncolytic virus.

Main Methods:

  • Development of a replication-conditional adenovirus expressing a p53-selective microRNA-network.
  • In vitro and in vivo assessment of viral replication in p53-dysfunctional and normal cells/mice.
  • Evaluation of tumor lysis and viral DNA load in liver tissues.

Main Results:

  • Antiviral RNAi selectively attenuated viral replication in cells with transcriptionally active p53.
  • Both control and engineered viruses replicated equivalently in p53-dysfunctional tumor cells.
  • The RNAi-controlled virus efficiently lysed p53-dysfunctional tumors in vitro and in vivo with reduced liver viral DNA load.

Conclusions:

  • A broadly applicable adenovirus for selective destruction of p53-dysfunctional tumors was generated.
  • Virus-encoded RNAi-networks are efficient and versatile tools to modify viral functions.
  • This approach can be applied to transcriptionally regulated DNA-viruses to create specifically replicating vectors for clinical applications.

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