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Updated: Sep 7, 2025

MicroRNA-based Regulation of Picornavirus Tropism
09:05

MicroRNA-based Regulation of Picornavirus Tropism

Published on: February 6, 2017

7.6K

Generation of a microRNA-Regulated Oncolytic Coxsackievirus B3

Babette Dieringer1, Leslie Elsner1, Ahmet Hazini1,2

  • 1Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Berlin, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|June 22, 2022
PubMed

Insights

Researchers engineered coxsackievirus B3 (CVB3) oncolytic viruses (OV) for cancer therapy. They inserted microRNA target sites (miR-TS) into the viral genome to enhance safety by limiting replication to tumor cells.

Area of Science:

  • Virology
  • Molecular Biology
  • Oncology

Background:

  • Picornaviruses exhibit oncolytic activity, showing potential for cancer treatment.
  • Oncolytic virus (OV) replication in normal tissues poses safety concerns.
  • MicroRNA target sites (miR-TS) absent in tumors but present in normal tissues can enhance OV safety.

Purpose of the Study:

  • To describe a method for inserting miR-TS into the coxsackievirus B3 (CVB3) genome.
  • To detail the generation, amplification, purification, and concentration of recombinant CVB3 carrying miR-TS.
  • To confirm the functionality of miR-TS within the engineered CVB3 genome.

Main Methods:

  • In-Fusion cloning technology was used to insert miR-TS into CVB3 cDNA.
  • Step-by-step protocols for generating recombinant CVB3 were provided.
  • Virus amplification, purification, concentration, and miR-TS functionality assays were performed.

Main Results:

  • Recombinant CVB3 carrying miR-TS was successfully generated using In-Fusion cloning.
  • Protocols for virus amplification, purification, and concentration were established.
  • The functionality of the inserted miR-TS in the viral genome was confirmed.

Conclusions:

  • The described method enables the straightforward engineering of CVB3 oncolytic viruses with enhanced tumor-targeting capabilities.
  • This approach offers a promising strategy to improve the safety profile of picornavirus-based OV therapies.
  • The developed protocol facilitates the production and validation of targeted oncolytic viruses for cancer treatment.
Keywords:
Coxsackievirus B3In-Fusion cloningOncolytic virusVirus plaque purificationcDNAmicroRNA target sitesmicroRNAs

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