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Gene Electrotransfer in 3D Reconstructed Human Dermal Tissue.

Moinecha Madi, Marie-Pierre Rols1, Laure Gibot2

  • 1IPBS-CNRS, 205 route de Narbonne, 31077 Toulouse, France; and Université de Toulouse, UPS, 31077 Toulouse, France. rols@ipbs.fr.

Current Gene Therapy
|April 1, 2016
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Summary

Gene electrotransfer into human skin shows promise for medical treatments. Using engineered human skin tissue, researchers demonstrated efficient DNA delivery and expression, highlighting the importance of plasmid mobility for successful transfection.

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Area of Science:

  • Biomedical Engineering
  • Molecular Biology
  • Dermatology

Background:

  • Gene electrotransfer holds potential for skin-related medical applications like DNA vaccination and cancer therapy.
  • Current understanding of DNA electrotransfer mechanisms in human skin is limited, hindering clinical translation.
  • Rodent models used in current research do not accurately reflect human skin's cellular composition and architecture.

Purpose of the Study:

  • To investigate gene electrotransfer mechanisms within a human tissue context using a tissue-engineering approach.
  • To establish a reliable in vitro model for studying DNA electrotransfer in human skin, reducing reliance on animal models.

Main Methods:

  • Development of 3D reconstructed human dermal tissue using primary human dermal fibroblasts via a self-assembly method.
  • Application of millisecond electric pulses for cell electropermeabilization and reporter gene electrotransfer into the engineered tissue.
  • Analysis of gene expression and cell viability post-electrotransfer, alongside investigation of factors influencing transfection success.

Main Results:

  • Efficient electropermeabilization of cells within the reconstructed human tissue using millisecond electric pulses, with preserved cell viability.
  • Successful reporter gene electrotransfer and detectable gene expression for up to 48 hours.
  • Transfected cells were localized to the tissue surface; transfection success correlated with plasmid mobility within the collagen-rich tissue, not cell proliferation status.

Conclusions:

  • Tissue-engineered human skin provides a viable in vitro model for studying gene electrotransfer mechanisms, offering an alternative to animal testing.
  • Understanding plasmid mobility within the extracellular matrix is crucial for optimizing DNA electrotransfer in human dermal tissues.
  • This approach facilitates the study of gene electrotransfer in a relevant human tissue context for advancing medical applications.