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Related Experiment Videos

Long-term cardiac gene expression using a coxsackieviral vector.

Byung-Kwan Lim1, Jae-Ok Shin, Sang-Chol Lee

  • 1Department of Medicine, Sungkyunkwan University School of Medicine, Cardiac and Vascular Center, Samsung Medical Center, 50 Il-won Dong, Kangnam-Ku, Seoul 135-710, South Korea.

Journal of Molecular and Cellular Cardiology
|April 27, 2005
PubMed
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Researchers engineered a recombinant coxsackievirus B3 (CVB3) to deliver genes to the heart. This novel viral vector achieved efficient gene expression in cardiac cells for at least eight weeks without causing mortality.

Area of Science:

  • Virology
  • Cardiology
  • Gene Therapy

Background:

  • Efficient myocardial gene transfer in adult hearts is challenging with traditional vectors.
  • Coxsackievirus B3 (CVB3) exhibits cardiotropism, suggesting its potential for targeted cardiac gene delivery.

Purpose of the Study:

  • To develop a recombinant coxsackievirus B3 (CVB3) vector for efficient gene transfer to the intact heart.
  • To assess the efficacy and duration of gene expression in cardiac myocytes using the engineered CVB3 vector.

Main Methods:

  • A recombinant CVB3 carrying a green fluorescent protein (GFP) gene (rCVB3-GFP) was constructed.
  • In vitro studies involved infecting HeLa cells and neonatal rat cardiac myocytes to confirm GFP expression.
  • In vivo studies administered rCVB3-GFP intraperitoneally to Balb/C mice to evaluate cardiac gene expression and safety.

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Main Results:

  • Recombinant CVB3 efficiently expressed GFP in infected HeLa cells and cardiac myocytes.
  • In vivo, GFP expression was detected in up to 30% of cardiac myocytes for 8 weeks post-infection.
  • Infection with rCVB3-GFP resulted in no mortality in mice, indicating a favorable safety profile.

Conclusions:

  • The cardiac tropism of CVB3 can be harnessed to create effective gene transfer vectors for the intact heart.
  • Recombinant CVB3 demonstrates sustained gene expression in cardiac tissue with minimal adverse effects.
  • This approach offers a promising strategy for myocardial gene therapy applications.